chiark / gitweb /
Make sure that we don't dereference NULL
[elogind.git] / src / core / load-fragment.c
index d24919f998fb0fca4af5d5cb942bced68ce0499f..f01843d65e77e28acbb984092ef6ec286f81f292 100644 (file)
@@ -4,6 +4,7 @@
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
+  Copyright 2012 Holger Hans Peter Freyther
 
   systemd is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
@@ -33,6 +34,8 @@
 #include <sys/time.h>
 #include <sys/resource.h>
 
+#include <systemd/sd-messages.h>
+
 #include "unit.h"
 #include "strv.h"
 #include "conf-parser.h"
 #include "securebits.h"
 #include "missing.h"
 #include "unit-name.h"
-#include "bus-errors.h"
+#include "unit-printf.h"
+#include "dbus-common.h"
 #include "utf8.h"
+#include "path-util.h"
+#include "syscall-list.h"
+#include "env-util.h"
+#include "cgroup.h"
 
 #ifndef HAVE_SYSV_COMPAT
-int config_parse_warn_compat(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        log_debug("[%s:%u] Support for option %s= has been disabled at compile time and is ignored", filename, line, lvalue);
+int config_parse_warn_compat(const char *unit,
+                             const char *filename,
+                             unsigned line,
+                             const char *section,
+                             const char *lvalue,
+                             int ltype,
+                             const char *rvalue,
+                             void *data,
+                             void *userdata) {
+
+        log_syntax(unit, LOG_DEBUG, filename, line, EINVAL,
+                   "Support for option %s= has been disabled at compile time and is ignored",
+                   lvalue);
         return 0;
 }
 #endif
 
-int config_parse_unit_deps(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_unit_deps(const char* unit,
+                           const char *filename,
+                           unsigned line,
+                           const char *section,
+                           const char *lvalue,
+                           int ltype,
+                           const char *rvalue,
+                           void *data,
+                           void *userdata) {
 
         UnitDependency d = ltype;
         Unit *u = userdata;
@@ -82,83 +92,41 @@ int config_parse_unit_deps(
         assert(rvalue);
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+                _cleanup_free_ char *t = NULL, *k = NULL;
                 int r;
 
                 t = strndup(w, l);
                 if (!t)
-                        return -ENOMEM;
+                        return log_oom();
 
-                k = unit_name_printf(u, t);
-                free(t);
-                if (!k)
-                        return -ENOMEM;
+                r = unit_name_printf(u, t, &k);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to resolve specifiers, ignoring: %s", strerror(-r));
+                        continue;
+                }
 
                 r = unit_add_dependency_by_name(u, d, k, NULL, true);
                 if (r < 0)
-                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", filename, line, k, strerror(-r));
-
-                free(k);
-        }
-
-        return 0;
-}
-
-int config_parse_unit_names(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        Unit *u = userdata;
-        char *w;
-        size_t l;
-        char *state;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
-                int r;
-
-                t = strndup(w, l);
-                if (!t)
-                        return -ENOMEM;
-
-                k = unit_name_printf(u, t);
-                free(t);
-                if (!k)
-                        return -ENOMEM;
-
-                r = unit_merge_by_name(u, k);
-                if (r < 0)
-                        log_error("Failed to add name %s, ignoring: %s", k, strerror(-r));
-
-                free(k);
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to add dependency on %s, ignoring: %s", k, strerror(-r));
         }
 
         return 0;
 }
 
-int config_parse_unit_string_printf(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_unit_string_printf(const char *unit,
+                                    const char *filename,
+                                    unsigned line,
+                                    const char *section,
+                                    const char *lvalue,
+                                    int ltype,
+                                    const char *rvalue,
+                                    void *data,
+                                    void *userdata) {
 
         Unit *u = userdata;
-        char *k;
+        _cleanup_free_ char *k = NULL;
         int r;
 
         assert(filename);
@@ -166,28 +134,27 @@ int config_parse_unit_string_printf(
         assert(rvalue);
         assert(u);
 
-        k = unit_full_printf(u, rvalue);
-        if (!k)
-                return -ENOMEM;
-
-        r = config_parse_string(filename, line, section, lvalue, ltype, k, data, userdata);
-        free (k);
+        r = unit_full_printf(u, rvalue, &k);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to resolve unit specifiers on %s, ignoring: %s", rvalue, strerror(-r));
 
-        return r;
+        return config_parse_string(unit, filename, line, section, lvalue, ltype,
+                                   k ? k : rvalue, data, userdata);
 }
 
-int config_parse_unit_strv_printf(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_unit_strv_printf(const char *unit,
+                                  const char *filename,
+                                  unsigned line,
+                                  const char *section,
+                                  const char *lvalue,
+                                  int ltype,
+                                  const char *rvalue,
+                                  void *data,
+                                  void *userdata) {
 
         Unit *u = userdata;
-        char *k;
+        _cleanup_free_ char *k = NULL;
         int r;
 
         assert(filename);
@@ -195,28 +162,27 @@ int config_parse_unit_strv_printf(
         assert(rvalue);
         assert(u);
 
-        k = unit_full_printf(u, rvalue);
-        if (!k)
-                return -ENOMEM;
-
-        r = config_parse_strv(filename, line, section, lvalue, ltype, k, data, userdata);
-        free(k);
+        r = unit_full_printf(u, rvalue, &k);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to resolve unit specifiers on %s, ignoring: %s", rvalue, strerror(-r));
 
-        return r;
+        return config_parse_strv(unit, filename, line, section, lvalue, ltype,
+                                 k ? k : rvalue, data, userdata);
 }
 
-int config_parse_unit_path_printf(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_unit_path_printf(const char *unit,
+                                  const char *filename,
+                                  unsigned line,
+                                  const char *section,
+                                  const char *lvalue,
+                                  int ltype,
+                                  const char *rvalue,
+                                  void *data,
+                                  void *userdata) {
 
         Unit *u = userdata;
-        char *k;
+        _cleanup_free_ char *k = NULL;
         int r;
 
         assert(filename);
@@ -224,28 +190,28 @@ int config_parse_unit_path_printf(
         assert(rvalue);
         assert(u);
 
-        k = unit_full_printf(u, rvalue);
-        if (!k)
-                return -ENOMEM;
-
-        r = config_parse_path(filename, line, section, lvalue, ltype, k, data, userdata);
-        free(k);
+        r = unit_full_printf(u, rvalue, &k);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to resolve unit specifiers on %s, ignoring: %s", rvalue, strerror(-r));
 
-        return r;
+        return config_parse_path(unit, filename, line, section, lvalue, ltype,
+                                 k ? k : rvalue, data, userdata);
 }
 
-int config_parse_socket_listen(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_socket_listen(const char *unit,
+                               const char *filename,
+                               unsigned line,
+                               const char *section,
+                               const char *lvalue,
+                               int ltype,
+                               const char *rvalue,
+                               void *data,
+                               void *userdata) {
 
         SocketPort *p, *tail;
         Socket *s;
+        int r;
 
         assert(filename);
         assert(lvalue);
@@ -254,67 +220,62 @@ int config_parse_socket_listen(
 
         s = SOCKET(data);
 
+        if (isempty(rvalue)) {
+                /* An empty assignment removes all ports */
+                socket_free_ports(s);
+                return 0;
+        }
+
         p = new0(SocketPort, 1);
         if (!p)
-                return -ENOMEM;
-
-        if (streq(lvalue, "ListenFIFO")) {
-                p->type = SOCKET_FIFO;
-
-                if (!(p->path = unit_full_printf(UNIT(s), rvalue))) {
-                        free(p);
-                        return -ENOMEM;
-                }
-
-                path_kill_slashes(p->path);
-
-        } else if (streq(lvalue, "ListenSpecial")) {
-                p->type = SOCKET_SPECIAL;
-
-                if (!(p->path = unit_full_printf(UNIT(s), rvalue))) {
-                        free(p);
-                        return -ENOMEM;
-                }
-
-                path_kill_slashes(p->path);
+                return log_oom();
 
-        } else if (streq(lvalue, "ListenMessageQueue")) {
+        if (ltype != SOCKET_SOCKET) {
 
-                p->type = SOCKET_MQUEUE;
-
-                if (!(p->path = unit_full_printf(UNIT(s), rvalue))) {
-                        free(p);
-                        return -ENOMEM;
+                p->type = ltype;
+                r = unit_full_printf(UNIT(s), rvalue, &p->path);
+                if (r < 0) {
+                        p->path = strdup(rvalue);
+                        if (!p->path) {
+                                free(p);
+                                return log_oom();
+                        } else
+                                log_syntax(unit, LOG_ERR, filename, line, -r,
+                                           "Failed to resolve unit specifiers on %s, ignoring: %s", rvalue, strerror(-r));
                 }
 
                 path_kill_slashes(p->path);
 
         } else if (streq(lvalue, "ListenNetlink")) {
-                char  *k;
-                int r;
+                _cleanup_free_ char  *k = NULL;
 
                 p->type = SOCKET_SOCKET;
-                k = unit_full_printf(UNIT(s), rvalue);
-                r = socket_address_parse_netlink(&p->address, k);
-                free(k);
+                r = unit_full_printf(UNIT(s), rvalue, &k);
+                if (r < 0)
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to resolve unit specifiers on %s, ignoring: %s", rvalue, strerror(-r));
 
+                r = socket_address_parse_netlink(&p->address, k ? k : rvalue);
                 if (r < 0) {
-                        log_error("[%s:%u] Failed to parse address value, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to parse address value, ignoring: %s", rvalue);
                         free(p);
                         return 0;
                 }
 
         } else {
-                char *k;
-                int r;
+                _cleanup_free_ char *k = NULL;
 
                 p->type = SOCKET_SOCKET;
-                k = unit_full_printf(UNIT(s), rvalue);
-                r = socket_address_parse(&p->address, k);
-                free(k);
+                r = unit_full_printf(UNIT(s), rvalue, &k);
+                if (r < 0)
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to resolve unit specifiers on %s, ignoring: %s", rvalue, strerror(-r));
 
+                r = socket_address_parse(&p->address, k ? k : rvalue);
                 if (r < 0) {
-                        log_error("[%s:%u] Failed to parse address value, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to parse address value, ignoring: %s", rvalue);
                         free(p);
                         return 0;
                 }
@@ -329,7 +290,8 @@ int config_parse_socket_listen(
                 }
 
                 if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
-                        log_error("[%s:%u] Address family not supported, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, ENOTSUP,
+                                   "Address family not supported, ignoring: %s", rvalue);
                         free(p);
                         return 0;
                 }
@@ -346,15 +308,15 @@ int config_parse_socket_listen(
         return 0;
 }
 
-int config_parse_socket_bind(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_socket_bind(const char *unit,
+                             const char *filename,
+                             unsigned line,
+                             const char *section,
+                             const char *lvalue,
+                             int ltype,
+                             const char *rvalue,
+                             void *data,
+                             void *userdata) {
 
         Socket *s;
         SocketAddressBindIPv6Only b;
@@ -366,11 +328,14 @@ int config_parse_socket_bind(
 
         s = SOCKET(data);
 
-        if ((b = socket_address_bind_ipv6_only_from_string(rvalue)) < 0) {
+        b = socket_address_bind_ipv6_only_from_string(rvalue);
+        if (b < 0) {
                 int r;
 
-                if ((r = parse_boolean(rvalue)) < 0) {
-                        log_error("[%s:%u] Failed to parse bind IPv6 only value, ignoring: %s", filename, line, rvalue);
+                r = parse_boolean(rvalue);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Failed to parse bind IPv6 only value, ignoring: %s", rvalue);
                         return 0;
                 }
 
@@ -381,31 +346,34 @@ int config_parse_socket_bind(
         return 0;
 }
 
-int config_parse_exec_nice(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec_nice(const char *unit,
+                           const char *filename,
+                           unsigned line,
+                           const char *section,
+                           const char *lvalue,
+                           int ltype,
+                           const char *rvalue,
+                           void *data,
+                           void *userdata) {
 
         ExecContext *c = data;
-        int priority;
+        int priority, r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if (safe_atoi(rvalue, &priority) < 0) {
-                log_error("[%s:%u] Failed to parse nice priority, ignoring: %s. ", filename, line, rvalue);
+        r = safe_atoi(rvalue, &priority);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to parse nice priority, ignoring: %s. ", rvalue);
                 return 0;
         }
 
         if (priority < PRIO_MIN || priority >= PRIO_MAX) {
-                log_error("[%s:%u] Nice priority out of range, ignoring: %s", filename, line, rvalue);
+                log_syntax(unit, LOG_ERR, filename, line, ERANGE,
+                           "Nice priority out of range, ignoring: %s", rvalue);
                 return 0;
         }
 
@@ -415,31 +383,34 @@ int config_parse_exec_nice(
         return 0;
 }
 
-int config_parse_exec_oom_score_adjust(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec_oom_score_adjust(const char* unit,
+                                       const char *filename,
+                                       unsigned line,
+                                       const char *section,
+                                       const char *lvalue,
+                                       int ltype,
+                                       const char *rvalue,
+                                       void *data,
+                                       void *userdata) {
 
         ExecContext *c = data;
-        int oa;
+        int oa, r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if (safe_atoi(rvalue, &oa) < 0) {
-                log_error("[%s:%u] Failed to parse the OOM score adjust value, ignoring: %s", filename, line, rvalue);
+        r = safe_atoi(rvalue, &oa);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to parse the OOM score adjust value, ignoring: %s", rvalue);
                 return 0;
         }
 
         if (oa < OOM_SCORE_ADJ_MIN || oa > OOM_SCORE_ADJ_MAX) {
-                log_error("[%s:%u] OOM score adjust value out of range, ignoring: %s", filename, line, rvalue);
+                log_syntax(unit, LOG_ERR, filename, line, ERANGE,
+                           "OOM score adjust value out of range, ignoring: %s", rvalue);
                 return 0;
         }
 
@@ -449,15 +420,15 @@ int config_parse_exec_oom_score_adjust(
         return 0;
 }
 
-int config_parse_exec(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec(const char *unit,
+                      const char *filename,
+                      unsigned line,
+                      const char *section,
+                      const char *lvalue,
+                      int ltype,
+                      const char *rvalue,
+                      void *data,
+                      void *userdata) {
 
         ExecCommand **e = data, *nce;
         char *path, **n;
@@ -469,13 +440,20 @@ int config_parse_exec(
         assert(rvalue);
         assert(e);
 
+        e += ltype;
+
+        if (isempty(rvalue)) {
+                /* An empty assignment resets the list */
+                exec_command_free_list(*e);
+                *e = NULL;
+                return 0;
+        }
+
         /* We accept an absolute path as first argument, or
          * alternatively an absolute prefixed with @ to allow
          * overriding of argv[0]. */
-
-        e += ltype;
-
         for (;;) {
+                int i;
                 char *w;
                 size_t l;
                 char *state;
@@ -490,24 +468,27 @@ int config_parse_exec(
                 if (rvalue[0] == 0)
                         break;
 
-                if (rvalue[0] == '-') {
-                        ignore = true;
-                        rvalue ++;
-                }
+                for (i = 0; i < 2; i++) {
+                        if (rvalue[0] == '-' && !ignore) {
+                                ignore = true;
+                                rvalue ++;
+                        }
 
-                if (rvalue[0] == '@') {
-                        honour_argv0 = true;
-                        rvalue ++;
+                        if (rvalue[0] == '@' && !honour_argv0) {
+                                honour_argv0 = true;
+                                rvalue ++;
+                        }
                 }
 
                 if (*rvalue != '/') {
-                        log_error("[%s:%u] Invalid executable path in command line, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Executable path is not absolute, ignoring: %s", rvalue);
                         return 0;
                 }
 
                 k = 0;
                 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                        if (strncmp(w, ";", MAX(l, 1U)) == 0)
+                        if (strneq(w, ";", MAX(l, 1U)))
                                 break;
 
                         k++;
@@ -515,24 +496,28 @@ int config_parse_exec(
 
                 n = new(char*, k + !honour_argv0);
                 if (!n)
-                        return -ENOMEM;
+                        return log_oom();
 
                 k = 0;
                 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                        if (strncmp(w, ";", MAX(l, 1U)) == 0)
+                        if (strneq(w, ";", MAX(l, 1U)))
                                 break;
+                        else if (strneq(w, "\\;", MAX(l, 1U)))
+                                w ++;
 
                         if (honour_argv0 && w == rvalue) {
                                 assert(!path);
 
                                 path = strndup(w, l);
                                 if (!path) {
-                                        r = -ENOMEM;
+                                        r = log_oom();
                                         goto fail;
                                 }
 
                                 if (!utf8_is_valid(path)) {
-                                        log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
+                                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                                   "Path is not UTF-8 clean, ignoring assignment: %s",
+                                                   rvalue);
                                         r = 0;
                                         goto fail;
                                 }
@@ -542,12 +527,14 @@ int config_parse_exec(
 
                                 c = n[k++] = cunescape_length(w, l);
                                 if (!c) {
-                                        r = -ENOMEM;
+                                        r = log_oom();
                                         goto fail;
                                 }
 
                                 if (!utf8_is_valid(c)) {
-                                        log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
+                                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                                   "Path is not UTF-8 clean, ignoring assignment: %s",
+                                                   rvalue);
                                         r = 0;
                                         goto fail;
                                 }
@@ -557,7 +544,8 @@ int config_parse_exec(
                 n[k] = NULL;
 
                 if (!n[0]) {
-                        log_error("[%s:%u] Invalid command line, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Invalid command line, ignoring: %s", rvalue);
                         r = 0;
                         goto fail;
                 }
@@ -565,7 +553,7 @@ int config_parse_exec(
                 if (!path) {
                         path = strdup(n[0]);
                         if (!path) {
-                                r = -ENOMEM;
+                                r = log_oom();
                                 goto fail;
                         }
                 }
@@ -574,7 +562,7 @@ int config_parse_exec(
 
                 nce = new0(ExecCommand, 1);
                 if (!nce) {
-                        r = -ENOMEM;
+                        r = log_oom();
                         goto fail;
                 }
 
@@ -603,15 +591,15 @@ fail:
 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
 
-int config_parse_socket_bindtodevice(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_socket_bindtodevice(const char* unit,
+                                     const char *filename,
+                                     unsigned line,
+                                     const char *section,
+                                     const char *lvalue,
+                                     int ltype,
+                                     const char *rvalue,
+                                     void *data,
+                                     void *userdata) {
 
         Socket *s = data;
         char *n;
@@ -622,8 +610,9 @@ int config_parse_socket_bindtodevice(
         assert(data);
 
         if (rvalue[0] && !streq(rvalue, "*")) {
-                if (!(n = strdup(rvalue)))
-                        return -ENOMEM;
+                n = strdup(rvalue);
+                if (!n)
+                        return log_oom();
         } else
                 n = NULL;
 
@@ -636,70 +625,78 @@ int config_parse_socket_bindtodevice(
 DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 DEFINE_CONFIG_PARSE_ENUM(config_parse_input, exec_input, ExecInput, "Failed to parse input specifier");
 
-int config_parse_facility(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
+int config_parse_exec_io_class(const char *unit,
+                               const char *filename,
+                               unsigned line,
+                               const char *section,
+                               const char *lvalue,
+                               int ltype,
+                               const char *rvalue,
+                               void *data,
+                               void *userdata) {
 
-        int *o = data, x;
+        ExecContext *c = data;
+        int x;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if ((x = log_facility_unshifted_from_string(rvalue)) < 0) {
-                log_error("[%s:%u] Failed to parse log facility, ignoring: %s", filename, line, rvalue);
+        x = ioprio_class_from_string(rvalue);
+        if (x < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Failed to parse IO scheduling class, ignoring: %s", rvalue);
                 return 0;
         }
 
-        *o = (x << 3) | LOG_PRI(*o);
+        c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
+        c->ioprio_set = true;
 
         return 0;
 }
 
-int config_parse_level(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
+int config_parse_exec_io_priority(const char *unit,
+                                  const char *filename,
+                                  unsigned line,
+                                  const char *section,
+                                  const char *lvalue,
+                                  int ltype,
+                                  const char *rvalue,
+                                  void *data,
+                                  void *userdata) {
 
-        int *o = data, x;
+        ExecContext *c = data;
+        int i, r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if ((x = log_level_from_string(rvalue)) < 0) {
-                log_error("[%s:%u] Failed to parse log level, ignoring: %s", filename, line, rvalue);
+        r = safe_atoi(rvalue, &i);
+        if (r < 0 || i < 0 || i >= IOPRIO_BE_NR) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to parse IO priority, ignoring: %s", rvalue);
                 return 0;
         }
 
-        *o = (*o & LOG_FACMASK) | x;
+        c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
+        c->ioprio_set = true;
+
         return 0;
 }
 
-int config_parse_exec_io_class(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec_cpu_sched_policy(const char *unit,
+                                       const char *filename,
+                                       unsigned line,
+                                       const char *section,
+                                       const char *lvalue,
+                                       int ltype,
+                                       const char *rvalue,
+                                       void *data,
+                                       void *userdata) {
+
 
         ExecContext *c = data;
         int x;
@@ -709,99 +706,55 @@ int config_parse_exec_io_class(
         assert(rvalue);
         assert(data);
 
-        if ((x = ioprio_class_from_string(rvalue)) < 0) {
-                log_error("[%s:%u] Failed to parse IO scheduling class, ignoring: %s", filename, line, rvalue);
+        x = sched_policy_from_string(rvalue);
+        if (x < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -x,
+                           "Failed to parse CPU scheduling policy, ignoring: %s", rvalue);
                 return 0;
         }
 
-        c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
-        c->ioprio_set = true;
+        c->cpu_sched_policy = x;
+        /* Moving to or from real-time policy? We need to adjust the priority */
+        c->cpu_sched_priority = CLAMP(c->cpu_sched_priority, sched_get_priority_min(x), sched_get_priority_max(x));
+        c->cpu_sched_set = true;
 
         return 0;
 }
 
-int config_parse_exec_io_priority(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec_cpu_sched_prio(const char *unit,
+                                     const char *filename,
+                                     unsigned line,
+                                     const char *section,
+                                     const char *lvalue,
+                                     int ltype,
+                                     const char *rvalue,
+                                     void *data,
+                                     void *userdata) {
 
         ExecContext *c = data;
-        int i;
+        int i, min, max, r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if (safe_atoi(rvalue, &i) < 0 || i < 0 || i >= IOPRIO_BE_NR) {
-                log_error("[%s:%u] Failed to parse io priority, ignoring: %s", filename, line, rvalue);
+        r = safe_atoi(rvalue, &i);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to parse CPU scheduling policy, ignoring: %s", rvalue);
                 return 0;
         }
 
-        c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
-        c->ioprio_set = true;
+        /* On Linux RR/FIFO range from 1 to 99 and OTHER/BATCH may only be 0 */
+        min = sched_get_priority_min(c->cpu_sched_policy);
+        max = sched_get_priority_max(c->cpu_sched_policy);
 
-        return 0;
-}
-
-int config_parse_exec_cpu_sched_policy(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-
-        ExecContext *c = data;
-        int x;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        if ((x = sched_policy_from_string(rvalue)) < 0) {
-                log_error("[%s:%u] Failed to parse CPU scheduling policy, ignoring: %s", filename, line, rvalue);
-                return 0;
-        }
-
-        c->cpu_sched_policy = x;
-        c->cpu_sched_set = true;
-
-        return 0;
-}
-
-int config_parse_exec_cpu_sched_prio(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        ExecContext *c = data;
-        int i;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        /* On Linux RR/FIFO have the same range */
-        if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
-                log_error("[%s:%u] Failed to parse CPU scheduling priority, ignoring: %s", filename, line, rvalue);
-                return 0;
-        }
+        if (i < min || i > max) {
+                log_syntax(unit, LOG_ERR, filename, line, ERANGE,
+                           "CPU scheduling priority is out of range, ignoring: %s", rvalue);
+                return 0;
+        }
 
         c->cpu_sched_priority = i;
         c->cpu_sched_set = true;
@@ -809,15 +762,15 @@ int config_parse_exec_cpu_sched_prio(
         return 0;
 }
 
-int config_parse_exec_cpu_affinity(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec_cpu_affinity(const char *unit,
+                                   const char *filename,
+                                   unsigned line,
+                                   const char *section,
+                                   const char *lvalue,
+                                   int ltype,
+                                   const char *rvalue,
+                                   void *data,
+                                   void *userdata) {
 
         ExecContext *c = data;
         char *w;
@@ -829,23 +782,34 @@ int config_parse_exec_cpu_affinity(
         assert(rvalue);
         assert(data);
 
+        if (isempty(rvalue)) {
+                /* An empty assignment resets the CPU list */
+                if (c->cpuset)
+                        CPU_FREE(c->cpuset);
+                c->cpuset = NULL;
+                return 0;
+        }
+
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t;
+                _cleanup_free_ char *t = NULL;
                 int r;
                 unsigned cpu;
 
-                if (!(t = strndup(w, l)))
-                        return -ENOMEM;
+                t = strndup(w, l);
+                if (!t)
+                        return log_oom();
 
                 r = safe_atou(t, &cpu);
-                free(t);
 
-                if (!(c->cpuset))
-                        if (!(c->cpuset = cpu_set_malloc(&c->cpuset_ncpus)))
-                                return -ENOMEM;
+                if (!c->cpuset) {
+                        c->cpuset = cpu_set_malloc(&c->cpuset_ncpus);
+                        if (!c->cpuset)
+                                return log_oom();
+                }
 
                 if (r < 0 || cpu >= c->cpuset_ncpus) {
-                        log_error("[%s:%u] Failed to parse CPU affinity, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, ERANGE,
+                                   "Failed to parse CPU affinity '%s', ignoring: %s", t, rvalue);
                         return 0;
                 }
 
@@ -855,15 +819,15 @@ int config_parse_exec_cpu_affinity(
         return 0;
 }
 
-int config_parse_exec_capabilities(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec_capabilities(const char *unit,
+                                   const char *filename,
+                                   unsigned line,
+                                   const char *section,
+                                   const char *lvalue,
+                                   int ltype,
+                                   const char *rvalue,
+                                   void *data,
+                                   void *userdata) {
 
         ExecContext *c = data;
         cap_t cap;
@@ -873,11 +837,10 @@ int config_parse_exec_capabilities(
         assert(rvalue);
         assert(data);
 
-        if (!(cap = cap_from_text(rvalue))) {
-                if (errno == ENOMEM)
-                        return -ENOMEM;
-
-                log_error("[%s:%u] Failed to parse capabilities, ignoring: %s", filename, line, rvalue);
+        cap = cap_from_text(rvalue);
+        if (!cap) {
+                log_syntax(unit, LOG_ERR, filename, line, errno,
+                           "Failed to parse capabilities, ignoring: %s", rvalue);
                 return 0;
         }
 
@@ -888,15 +851,15 @@ int config_parse_exec_capabilities(
         return 0;
 }
 
-int config_parse_exec_secure_bits(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec_secure_bits(const char *unit,
+                                  const char *filename,
+                                  unsigned line,
+                                  const char *section,
+                                  const char *lvalue,
+                                  int ltype,
+                                  const char *rvalue,
+                                  void *data,
+                                  void *userdata) {
 
         ExecContext *c = data;
         char *w;
@@ -908,21 +871,28 @@ int config_parse_exec_secure_bits(
         assert(rvalue);
         assert(data);
 
+        if (isempty(rvalue)) {
+                /* An empty assignment resets the field */
+                c->secure_bits = 0;
+                return 0;
+        }
+
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
                 if (first_word(w, "keep-caps"))
-                        c->secure_bits |= SECURE_KEEP_CAPS;
+                        c->secure_bits |= 1<<SECURE_KEEP_CAPS;
                 else if (first_word(w, "keep-caps-locked"))
-                        c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
+                        c->secure_bits |= 1<<SECURE_KEEP_CAPS_LOCKED;
                 else if (first_word(w, "no-setuid-fixup"))
-                        c->secure_bits |= SECURE_NO_SETUID_FIXUP;
+                        c->secure_bits |= 1<<SECURE_NO_SETUID_FIXUP;
                 else if (first_word(w, "no-setuid-fixup-locked"))
-                        c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
+                        c->secure_bits |= 1<<SECURE_NO_SETUID_FIXUP_LOCKED;
                 else if (first_word(w, "noroot"))
-                        c->secure_bits |= SECURE_NOROOT;
+                        c->secure_bits |= 1<<SECURE_NOROOT;
                 else if (first_word(w, "noroot-locked"))
-                        c->secure_bits |= SECURE_NOROOT_LOCKED;
+                        c->secure_bits |= 1<<SECURE_NOROOT_LOCKED;
                 else {
-                        log_error("[%s:%u] Failed to parse secure bits, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Failed to parse secure bits, ignoring: %s", rvalue);
                         return 0;
                 }
         }
@@ -930,17 +900,17 @@ int config_parse_exec_secure_bits(
         return 0;
 }
 
-int config_parse_exec_bounding_set(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        ExecContext *c = data;
+int config_parse_bounding_set(const char *unit,
+                              const char *filename,
+                              unsigned line,
+                              const char *section,
+                              const char *lvalue,
+                              int ltype,
+                              const char *rvalue,
+                              void *data,
+                              void *userdata) {
+
+        uint64_t *capability_bounding_set_drop = data;
         char *w;
         size_t l;
         char *state;
@@ -963,69 +933,41 @@ int config_parse_exec_bounding_set(
          * interface. */
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t;
+                _cleanup_free_ char *t = NULL;
                 int r;
                 cap_value_t cap;
 
-                if (!(t = strndup(w, l)))
-                        return -ENOMEM;
+                t = strndup(w, l);
+                if (!t)
+                        return log_oom();
 
                 r = cap_from_name(t, &cap);
-                free(t);
-
                 if (r < 0) {
-                        log_error("[%s:%u] Failed to parse capability bounding set, ignoring: %s", filename, line, rvalue);
-                        return 0;
+                        log_syntax(unit, LOG_ERR, filename, line, errno,
+                                   "Failed to parse capability in bounding set, ignoring: %s", t);
+                        continue;
                 }
 
                 sum |= ((uint64_t) 1ULL) << (uint64_t) cap;
         }
 
         if (invert)
-                c->capability_bounding_set_drop |= sum;
+                *capability_bounding_set_drop |= sum;
         else
-                c->capability_bounding_set_drop |= ~sum;
+                *capability_bounding_set_drop |= ~sum;
 
         return 0;
 }
 
-int config_parse_exec_timer_slack_nsec(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        ExecContext *c = data;
-        unsigned long u;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        if (safe_atolu(rvalue, &u) < 0) {
-                log_error("[%s:%u] Failed to parse time slack value, ignoring: %s", filename, line, rvalue);
-                return 0;
-        }
-
-        c->timer_slack_nsec = u;
-
-        return 0;
-}
-
-int config_parse_limit(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_limit(const char *unit,
+                       const char *filename,
+                       unsigned line,
+                       const char *section,
+                       const char *lvalue,
+                       int ltype,
+                       const char *rvalue,
+                       void *data,
+                       void *userdata) {
 
         struct rlimit **rl = data;
         unsigned long long u;
@@ -1039,87 +981,50 @@ int config_parse_limit(
 
         if (streq(rvalue, "infinity"))
                 u = (unsigned long long) RLIM_INFINITY;
-        else if (safe_atollu(rvalue, &u) < 0) {
-                log_error("[%s:%u] Failed to parse resource value, ignoring: %s", filename, line, rvalue);
-                return 0;
-        }
-
-        if (!*rl)
-                if (!(*rl = new(struct rlimit, 1)))
-                        return -ENOMEM;
-
-        (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
-        return 0;
-}
-
-int config_parse_unit_cgroup(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        Unit *u = userdata;
-        char *w;
-        size_t l;
-        char *state;
-
-        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+        else {
                 int r;
 
-                t = strndup(w, l);
-                if (!t)
-                        return -ENOMEM;
-
-                k = unit_full_printf(u, t);
-                free(t);
-
-                if (!k)
-                        return -ENOMEM;
-
-                t = cunescape(k);
-                free(k);
-
-                if (!t)
-                        return -ENOMEM;
-
-                r = unit_add_cgroup_from_text(u, t);
-                free(t);
-
+                r = safe_atollu(rvalue, &u);
                 if (r < 0) {
-                        log_error("[%s:%u] Failed to parse cgroup value, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to parse resource value, ignoring: %s", rvalue);
                         return 0;
                 }
         }
 
+        if (!*rl) {
+                *rl = new(struct rlimit, 1);
+                if (!*rl)
+                        return log_oom();
+        }
+
+        (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
         return 0;
 }
 
 #ifdef HAVE_SYSV_COMPAT
-int config_parse_sysv_priority(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_sysv_priority(const char *unit,
+                               const char *filename,
+                               unsigned line,
+                               const char *section,
+                               const char *lvalue,
+                               int ltype,
+                               const char *rvalue,
+                               void *data,
+                               void *userdata) {
 
         int *priority = data;
-        int i;
+        int i, r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if (safe_atoi(rvalue, &i) < 0 || i < 0) {
-                log_error("[%s:%u] Failed to parse SysV start priority, ignoring: %s", filename, line, rvalue);
+        r = safe_atoi(rvalue, &i);
+        if (r < 0 || i < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to parse SysV start priority, ignoring: %s", rvalue);
                 return 0;
         }
 
@@ -1128,26 +1033,28 @@ int config_parse_sysv_priority(
 }
 #endif
 
-int config_parse_fsck_passno(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_fsck_passno(const char *unit,
+                             const char *filename,
+                             unsigned line,
+                             const char *section,
+                             const char *lvalue,
+                             int ltype,
+                             const char *rvalue,
+                             void *data,
+                             void *userdata) {
 
         int *passno = data;
-        int i;
+        int i, r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if (safe_atoi(rvalue, &i) || i < 0) {
-                log_error("[%s:%u] Failed to parse fsck pass number, ignoring: %s", filename, line, rvalue);
+        r = safe_atoi(rvalue, &i);
+        if (r || i < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to parse fsck pass number, ignoring: %s", rvalue);
                 return 0;
         }
 
@@ -1157,15 +1064,15 @@ int config_parse_fsck_passno(
 
 DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
 
-int config_parse_kill_signal(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_kill_signal(const char *unit,
+                             const char *filename,
+                             unsigned line,
+                             const char *section,
+                             const char *lvalue,
+                             int ltype,
+                             const char *rvalue,
+                             void *data,
+                             void *userdata) {
 
         int *sig = data;
         int r;
@@ -1175,8 +1082,10 @@ int config_parse_kill_signal(
         assert(rvalue);
         assert(sig);
 
-        if ((r = signal_from_string_try_harder(rvalue)) <= 0) {
-                log_error("[%s:%u] Failed to parse kill signal, ignoring: %s", filename, line, rvalue);
+        r = signal_from_string_try_harder(rvalue);
+        if (r <= 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to parse kill signal, ignoring: %s", rvalue);
                 return 0;
         }
 
@@ -1184,15 +1093,15 @@ int config_parse_kill_signal(
         return 0;
 }
 
-int config_parse_exec_mount_flags(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_exec_mount_flags(const char *unit,
+                                  const char *filename,
+                                  unsigned line,
+                                  const char *section,
+                                  const char *lvalue,
+                                  int ltype,
+                                  const char *rvalue,
+                                  void *data,
+                                  void *userdata) {
 
         ExecContext *c = data;
         char *w;
@@ -1205,15 +1114,23 @@ int config_parse_exec_mount_flags(
         assert(rvalue);
         assert(data);
 
-        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                if (strncmp(w, "shared", MAX(l, 6U)) == 0)
+        FOREACH_WORD_SEPARATOR(w, l, rvalue, ", ", state) {
+                _cleanup_free_ char *t;
+
+                t = strndup(w, l);
+                if (!t)
+                        return log_oom();
+
+                if (streq(t, "shared"))
                         flags |= MS_SHARED;
-                else if (strncmp(w, "slave", MAX(l, 5U)) == 0)
+                else if (streq(t, "slave"))
                         flags |= MS_SLAVE;
-                else if (strncmp(w, "private", MAX(l, 7U)) == 0)
+                else if (streq(w, "private"))
                         flags |= MS_PRIVATE;
                 else {
-                        log_error("[%s:%u] Failed to parse mount flags, ignoring: %s", filename, line, rvalue);
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Failed to parse mount flag %s, ignoring: %s",
+                                   t, rvalue);
                         return 0;
                 }
         }
@@ -1222,48 +1139,77 @@ int config_parse_exec_mount_flags(
         return 0;
 }
 
-int config_parse_timer(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_timer(const char *unit,
+                       const char *filename,
+                       unsigned line,
+                       const char *section,
+                       const char *lvalue,
+                       int ltype,
+                       const char *rvalue,
+                       void *data,
+                       void *userdata) {
 
         Timer *t = data;
-        usec_t u;
+        usec_t u = 0;
         TimerValue *v;
         TimerBase b;
+        CalendarSpec *c = NULL;
+        clockid_t id;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if ((b = timer_base_from_string(lvalue)) < 0) {
-                log_error("[%s:%u] Failed to parse timer base, ignoring: %s", filename, line, lvalue);
+        if (isempty(rvalue)) {
+                /* Empty assignment resets list */
+                timer_free_values(t);
                 return 0;
         }
 
-        if (parse_usec(rvalue, &u) < 0) {
-                log_error("[%s:%u] Failed to parse timer value, ignoring: %s", filename, line, rvalue);
+        b = timer_base_from_string(lvalue);
+        if (b < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -b,
+                           "Failed to parse timer base, ignoring: %s", lvalue);
                 return 0;
         }
 
-        if (!(v = new0(TimerValue, 1)))
-                return -ENOMEM;
+        if (b == TIMER_CALENDAR) {
+                if (calendar_spec_from_string(rvalue, &c) < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Failed to parse calendar specification, ignoring: %s",
+                                   rvalue);
+                        return 0;
+                }
+
+                id = CLOCK_REALTIME;
+        } else {
+                if (parse_sec(rvalue, &u) < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Failed to parse timer value, ignoring: %s",
+                                   rvalue);
+                        return 0;
+                }
+
+                id = CLOCK_MONOTONIC;
+        }
+
+        v = new0(TimerValue, 1);
+        if (!v)
+                return log_oom();
 
         v->base = b;
+        v->clock_id = id;
         v->value = u;
+        v->calendar_spec = c;
 
         LIST_PREPEND(TimerValue, value, t->values, v);
 
         return 0;
 }
 
-int config_parse_timer_unit(
+int config_parse_trigger_unit(
+                const char *unit,
                 const char *filename,
                 unsigned line,
                 const char *section,
@@ -1273,74 +1219,107 @@ int config_parse_timer_unit(
                 void *data,
                 void *userdata) {
 
-        Timer *t = data;
+        _cleanup_free_ char *p = NULL;
+        Unit *u = data;
+        UnitType type;
         int r;
-        DBusError error;
-        Unit *u;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        dbus_error_init(&error);
+        if (!set_isempty(u->dependencies[UNIT_TRIGGERS])) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Multiple units to trigger specified, ignoring: %s", rvalue);
+                return 0;
+        }
 
-        if (endswith(rvalue, ".timer")) {
-                log_error("[%s:%u] Unit cannot be of type timer, ignoring: %s", filename, line, rvalue);
+        r = unit_name_printf(u, rvalue, &p);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to resolve specifiers, ignoring: %s", strerror(-r));
+
+        type = unit_name_to_type(p ?: rvalue);
+        if (type < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Unit type not valid, ignoring: %s", rvalue);
                 return 0;
         }
 
-        r = manager_load_unit(UNIT(t)->manager, rvalue, NULL, NULL, &u);
-        if (r < 0) {
-                log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r));
-                dbus_error_free(&error);
+        if (type == u->type) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Trigger cannot be of same type, ignoring: %s", rvalue);
                 return 0;
         }
 
-        unit_ref_set(&t->unit, u);
+        r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_TRIGGERS, p ?: rvalue, NULL, true);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to add trigger on %s, ignoring: %s", p ?: rvalue, strerror(-r));
+                return 0;
+        }
 
         return 0;
 }
 
-int config_parse_path_spec(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_path_spec(const char *unit,
+                           const char *filename,
+                           unsigned line,
+                           const char *section,
+                           const char *lvalue,
+                           int ltype,
+                           const char *rvalue,
+                           void *data,
+                           void *userdata) {
 
         Path *p = data;
         PathSpec *s;
         PathType b;
+        _cleanup_free_ char *k = NULL;
+        int r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if ((b = path_type_from_string(lvalue)) < 0) {
-                log_error("[%s:%u] Failed to parse path type, ignoring: %s", filename, line, lvalue);
+        if (isempty(rvalue)) {
+                /* Empty assignment clears list */
+                path_free_specs(p);
                 return 0;
         }
 
-        if (!path_is_absolute(rvalue)) {
-                log_error("[%s:%u] Path is not absolute, ignoring: %s", filename, line, rvalue);
+        b = path_type_from_string(lvalue);
+        if (b < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Failed to parse path type, ignoring: %s", lvalue);
                 return 0;
         }
 
-        if (!(s = new0(PathSpec, 1)))
-                return -ENOMEM;
+        r = unit_full_printf(UNIT(p), rvalue, &k);
+        if (r < 0) {
+                k = strdup(rvalue);
+                if (!k)
+                        return log_oom();
+                else
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to resolve unit specifiers on %s. Ignoring.",
+                                   rvalue);
+        }
 
-        if (!(s->path = strdup(rvalue))) {
-                free(s);
-                return -ENOMEM;
+        if (!path_is_absolute(k)) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Path is not absolute, ignoring: %s", k);
+                return 0;
         }
 
-        path_kill_slashes(s->path);
+        s = new0(PathSpec, 1);
+        if (!s)
+                return log_oom();
 
+        s->path = path_kill_slashes(k);
+        k = NULL;
         s->type = b;
         s->inotify_fd = -1;
 
@@ -1349,58 +1328,21 @@ int config_parse_path_spec(
         return 0;
 }
 
-int config_parse_path_unit(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        Path *t = data;
-        int r;
-        DBusError error;
-        Unit *u;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        dbus_error_init(&error);
-
-        if (endswith(rvalue, ".path")) {
-                log_error("[%s:%u] Unit cannot be of type path, ignoring: %s", filename, line, rvalue);
-                return 0;
-        }
-
-        if ((r = manager_load_unit(UNIT(t)->manager, rvalue, NULL, &error, &u)) < 0) {
-                log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r));
-                dbus_error_free(&error);
-                return 0;
-        }
-
-        unit_ref_set(&t->unit, u);
-
-        return 0;
-}
-
-int config_parse_socket_service(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_socket_service(const char *unit,
+                                const char *filename,
+                                unsigned line,
+                                const char *section,
+                                const char *lvalue,
+                                int ltype,
+                                const char *rvalue,
+                                void *data,
+                                void *userdata) {
 
         Socket *s = data;
         int r;
         DBusError error;
         Unit *x;
+        _cleanup_free_ char *p = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1409,14 +1351,22 @@ int config_parse_socket_service(
 
         dbus_error_init(&error);
 
-        if (!endswith(rvalue, ".service")) {
-                log_error("[%s:%u] Unit must be of type service, ignoring: %s", filename, line, rvalue);
+        r = unit_name_printf(UNIT(s), rvalue, &p);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to resolve specifiers, ignoring: %s", rvalue);
+
+        if (!endswith(p ?: rvalue, ".service")) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Unit must be of type service, ignoring: %s", rvalue);
                 return 0;
         }
 
-        r = manager_load_unit(UNIT(s)->manager, rvalue, NULL, &error, &x);
+        r = manager_load_unit(UNIT(s)->manager, p ?: rvalue, NULL, &error, &x);
         if (r < 0) {
-                log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r));
+                log_syntax(unit, LOG_ERR, filename, line, r,
+                           "Failed to load unit %s, ignoring: %s",
+                           rvalue, bus_error(&error, r));
                 dbus_error_free(&error);
                 return 0;
         }
@@ -1426,15 +1376,15 @@ int config_parse_socket_service(
         return 0;
 }
 
-int config_parse_service_sockets(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_service_sockets(const char *unit,
+                                 const char *filename,
+                                 unsigned line,
+                                 const char *section,
+                                 const char *lvalue,
+                                 int ltype,
+                                 const char *rvalue,
+                                 void *data,
+                                 void *userdata) {
 
         Service *s = data;
         int r;
@@ -1447,87 +1397,190 @@ int config_parse_service_sockets(
         assert(data);
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+                _cleanup_free_ char *t = NULL, *k = NULL;
 
                 t = strndup(w, l);
                 if (!t)
-                        return -ENOMEM;
-
-                k = unit_name_printf(UNIT(s), t);
-                free(t);
+                        return log_oom();
 
-                if (!k)
-                        return -ENOMEM;
+                r = unit_name_printf(UNIT(s), t, &k);
+                if (r < 0)
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to resolve specifiers, ignoring: %s", strerror(-r));
 
-                if (!endswith(k, ".socket")) {
-                        log_error("[%s:%u] Unit must be of type socket, ignoring: %s", filename, line, rvalue);
-                        free(k);
+                if (!endswith(k ?: t, ".socket")) {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Unit must be of type socket, ignoring: %s", k ?: t);
                         continue;
                 }
 
-                r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_WANTS, UNIT_AFTER, k, NULL, true);
+                r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_WANTS, UNIT_AFTER, k ?: t, NULL, true);
                 if (r < 0)
-                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", filename, line, k, strerror(-r));
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to add dependency on %s, ignoring: %s",
+                                   k ?: t, strerror(-r));
 
-                r = unit_add_dependency_by_name(UNIT(s), UNIT_TRIGGERED_BY, k, NULL, true);
+                r = unit_add_dependency_by_name(UNIT(s), UNIT_TRIGGERED_BY, k ?: t, NULL, true);
                 if (r < 0)
                         return r;
-
-                free(k);
         }
 
         return 0;
 }
 
-int config_parse_unit_env_file(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_service_timeout(const char *unit,
+                                 const char *filename,
+                                 unsigned line,
+                                 const char *section,
+                                 const char *lvalue,
+                                 int ltype,
+                                 const char *rvalue,
+                                 void *data,
+                                 void *userdata) {
+
+        Service *s = userdata;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(s);
+
+        r = config_parse_sec(unit, filename, line, section, lvalue, ltype,
+                             rvalue, data, userdata);
+        if (r < 0)
+                return r;
+
+        if (streq(lvalue, "TimeoutSec")) {
+                s->start_timeout_defined = true;
+                s->timeout_stop_usec = s->timeout_start_usec;
+        } else if (streq(lvalue, "TimeoutStartSec"))
+                s->start_timeout_defined = true;
+
+        return 0;
+}
 
-        char ***env = data, **k;
+int config_parse_unit_env_file(const char *unit,
+                               const char *filename,
+                               unsigned line,
+                               const char *section,
+                               const char *lvalue,
+                               int ltype,
+                               const char *rvalue,
+                               void *data,
+                               void *userdata) {
+
+        char ***env = data;
         Unit *u = userdata;
-        char *s;
+        _cleanup_free_ char *n = NULL;
+        const char *s;
+        int r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        s = unit_full_printf(u, rvalue);
-        if (!s)
-                return -ENOMEM;
+        if (isempty(rvalue)) {
+                /* Empty assignment frees the list */
+                strv_free(*env);
+                *env = NULL;
+                return 0;
+        }
 
+        r = unit_full_printf(u, rvalue, &n);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, r,
+                           "Failed to resolve specifiers, ignoring: %s", rvalue);
+
+        s = n ?: rvalue;
         if (!path_is_absolute(s[0] == '-' ? s + 1 : s)) {
-                log_error("[%s:%u] Path '%s' is not absolute, ignoring.", filename, line, s);
-                free(s);
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Path '%s' is not absolute, ignoring.", s);
+                return 0;
+        }
+
+        r = strv_extend(env, s);
+        if (r < 0)
+                return log_oom();
+
+        return 0;
+}
+
+int config_parse_environ(const char *unit,
+                         const char *filename,
+                         unsigned line,
+                         const char *section,
+                         const char *lvalue,
+                         int ltype,
+                         const char *rvalue,
+                         void *data,
+                         void *userdata) {
+
+        Unit *u = userdata;
+        char*** env = data, *w, *state;
+        size_t l;
+        _cleanup_free_ char *k = NULL;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                strv_free(*env);
+                *env = NULL;
                 return 0;
         }
 
-        k = strv_append(*env, s);
-        free(s);
+        if (u) {
+                r = unit_full_printf(u, rvalue, &k);
+                if (r < 0)
+                        log_syntax(unit, LOG_ERR, filename, line, -r,
+                                   "Failed to resolve specifiers, ignoring: %s", rvalue);
+        }
+
         if (!k)
-                return -ENOMEM;
+                k = strdup(rvalue);
+        if (!k)
+                return log_oom();
+
+        FOREACH_WORD_QUOTED(w, l, k, state) {
+                _cleanup_free_ char *n;
+                char **x;
 
-        strv_free(*env);
-        *env = k;
+                n = cunescape_length(w, l);
+                if (!n)
+                        return log_oom();
+
+                if (!env_assignment_is_valid(n)) {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Invalid environment assignment, ignoring: %s", rvalue);
+                        continue;
+                }
+
+                x = strv_env_set(*env, n);
+                if (!x)
+                        return log_oom();
+
+                strv_free(*env);
+                *env = x;
+        }
 
         return 0;
 }
 
-int config_parse_ip_tos(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_ip_tos(const char *unit,
+                        const char *filename,
+                        unsigned line,
+                        const char *section,
+                        const char *lvalue,
+                        int ltype,
+                        const char *rvalue,
+                        void *data,
+                        void *userdata) {
 
         int *ip_tos = data, x;
 
@@ -1536,36 +1589,46 @@ int config_parse_ip_tos(
         assert(rvalue);
         assert(data);
 
-        if ((x = ip_tos_from_string(rvalue)) < 0)
-                if (safe_atoi(rvalue, &x) < 0) {
-                        log_error("[%s:%u] Failed to parse IP TOS value, ignoring: %s", filename, line, rvalue);
-                        return 0;
-                }
+        x = ip_tos_from_string(rvalue);
+        if (x < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Failed to parse IP TOS value, ignoring: %s", rvalue);
+                return 0;
+        }
 
         *ip_tos = x;
         return 0;
 }
 
-int config_parse_unit_condition_path(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_unit_condition_path(const char *unit,
+                                     const char *filename,
+                                     unsigned line,
+                                     const char *section,
+                                     const char *lvalue,
+                                     int ltype,
+                                     const char *rvalue,
+                                     void *data,
+                                     void *userdata) {
 
         ConditionType cond = ltype;
         Unit *u = data;
         bool trigger, negate;
         Condition *c;
+        _cleanup_free_ char *p = NULL;
+        int r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                condition_free_list(u->conditions);
+                u->conditions = NULL;
+                return 0;
+        }
+
         trigger = rvalue[0] == '|';
         if (trigger)
                 rvalue++;
@@ -1574,61 +1637,94 @@ int config_parse_unit_condition_path(
         if (negate)
                 rvalue++;
 
-        if (!path_is_absolute(rvalue)) {
-                log_error("[%s:%u] Path in condition not absolute, ignoring: %s", filename, line, rvalue);
+        r = unit_full_printf(u, rvalue, &p);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to resolve specifiers, ignoring: %s", rvalue);
+        if (!p) {
+                p = strdup(rvalue);
+                if (!p)
+                        return log_oom();
+        }
+
+        if (!path_is_absolute(p)) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Path in condition not absolute, ignoring: %s", p);
                 return 0;
         }
 
-        c = condition_new(cond, rvalue, trigger, negate);
+        c = condition_new(cond, p, trigger, negate);
         if (!c)
-                return -ENOMEM;
+                return log_oom();
 
         LIST_PREPEND(Condition, conditions, u->conditions, c);
         return 0;
 }
 
-int config_parse_unit_condition_string(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+int config_parse_unit_condition_string(const char *unit,
+                                       const char *filename,
+                                       unsigned line,
+                                       const char *section,
+                                       const char *lvalue,
+                                       int ltype,
+                                       const char *rvalue,
+                                       void *data,
+                                       void *userdata) {
 
         ConditionType cond = ltype;
         Unit *u = data;
         bool trigger, negate;
         Condition *c;
+        _cleanup_free_ char *s = NULL;
+        int r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        if ((trigger = rvalue[0] == '|'))
-                rvalue++;
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                condition_free_list(u->conditions);
+                u->conditions = NULL;
+                return 0;
+        }
 
-        if ((negate = rvalue[0] == '!'))
+        trigger = rvalue[0] == '|';
+        if (trigger)
                 rvalue++;
 
-        if (!(c = condition_new(cond, rvalue, trigger, negate)))
-                return -ENOMEM;
+        negate = rvalue[0] == '!';
+        if (negate)
+                rvalue++;
 
-        LIST_PREPEND(Condition, conditions, u->conditions, c);
-        return 0;
-}
+        r = unit_full_printf(u, rvalue, &s);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to resolve specifiers, ignoring: %s", rvalue);
+        if (!s) {
+                s = strdup(rvalue);
+                if (!s)
+                        return log_oom();
+        }
 
-int config_parse_unit_condition_null(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
+        c = condition_new(cond, s, trigger, negate);
+        if (!c)
+                return log_oom();
+
+        LIST_PREPEND(Condition, conditions, u->conditions, c);
+        return 0;
+}
+
+int config_parse_unit_condition_null(const char *unit,
+                                     const char *filename,
+                                     unsigned line,
+                                     const char *section,
+                                     const char *lvalue,
+                                     int ltype,
+                                     const char *rvalue,
+                                     void *data,
+                                     void *userdata) {
 
         Unit *u = data;
         Condition *c;
@@ -1640,22 +1736,35 @@ int config_parse_unit_condition_null(
         assert(rvalue);
         assert(data);
 
-        if ((trigger = rvalue[0] == '|'))
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                condition_free_list(u->conditions);
+                u->conditions = NULL;
+                return 0;
+        }
+
+        trigger = rvalue[0] == '|';
+        if (trigger)
                 rvalue++;
 
-        if ((negate = rvalue[0] == '!'))
+        negate = rvalue[0] == '!';
+        if (negate)
                 rvalue++;
 
-        if ((b = parse_boolean(rvalue)) < 0) {
-                log_error("[%s:%u] Failed to parse boolean value in condition, ignoring: %s", filename, line, rvalue);
+        b = parse_boolean(rvalue);
+        if (b < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -b,
+                           "Failed to parse boolean value in condition, ignoring: %s",
+                           rvalue);
                 return 0;
         }
 
         if (!b)
                 negate = !negate;
 
-        if (!(c = condition_new(CONDITION_NULL, NULL, trigger, negate)))
-                return -ENOMEM;
+        c = condition_new(CONDITION_NULL, NULL, trigger, negate);
+        if (!c)
+                return log_oom();
 
         LIST_PREPEND(Condition, conditions, u->conditions, c);
         return 0;
@@ -1664,7 +1773,8 @@ int config_parse_unit_condition_null(
 DEFINE_CONFIG_PARSE_ENUM(config_parse_notify_access, notify_access, NotifyAccess, "Failed to parse notify access specifier");
 DEFINE_CONFIG_PARSE_ENUM(config_parse_start_limit_action, start_limit_action, StartLimitAction, "Failed to parse start limit action specifier");
 
-int config_parse_unit_cgroup_attr(
+int config_parse_unit_requires_mounts_for(
+                const char *unit,
                 const char *filename,
                 unsigned line,
                 const char *section,
@@ -1674,365 +1784,462 @@ int config_parse_unit_cgroup_attr(
                 void *data,
                 void *userdata) {
 
-        Unit *u = data;
-        char **l;
-        int r;
+        Unit *u = userdata;
+        char *state;
+        size_t l;
+        char *w;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        l = strv_split_quoted(rvalue);
-        if (!l)
-                return -ENOMEM;
+        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
+                int r;
+                _cleanup_free_ char *n;
 
-        if (strv_length(l) != 2) {
-                log_error("[%s:%u] Failed to parse cgroup attribute value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
-                return 0;
-        }
+                n = strndup(w, l);
+                if (!n)
+                        return log_oom();
 
-        r = unit_add_cgroup_attribute(u, NULL, l[0], l[1], NULL);
-        strv_free(l);
+                if (!utf8_is_valid(n)) {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Path is not UTF-8 clean, ignoring assignment: %s", rvalue);
+                        continue;
+                }
 
-        if (r < 0) {
-                log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
-                return 0;
+                r = unit_require_mounts_for(u, n);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r,
+                                   "Failed to add required mount for, ignoring: %s", rvalue);
+                        continue;
+                }
         }
 
         return 0;
 }
 
-int config_parse_unit_cpu_shares(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) {
-        Unit *u = data;
+int config_parse_documentation(const char *unit,
+                               const char *filename,
+                               unsigned line,
+                               const char *section,
+                               const char *lvalue,
+                               int ltype,
+                               const char *rvalue,
+                               void *data,
+                               void *userdata) {
+
+        Unit *u = userdata;
         int r;
-        unsigned long ul;
-        char *t;
+        char **a, **b;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
-        assert(data);
+        assert(u);
 
-        if (safe_atolu(rvalue, &ul) < 0 || ul < 1) {
-                log_error("[%s:%u] Failed to parse CPU shares value, ignoring: %s", filename, line, rvalue);
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                strv_free(u->documentation);
+                u->documentation = NULL;
                 return 0;
         }
 
-        if (asprintf(&t, "%lu", ul) < 0)
-                return -ENOMEM;
+        r = config_parse_unit_strv_printf(unit, filename, line, section, lvalue, ltype,
+                                          rvalue, data, userdata);
+        if (r < 0)
+                return r;
 
-        r = unit_add_cgroup_attribute(u, "cpu", "cpu.shares", t, NULL);
-        free(t);
+        for (a = b = u->documentation; a && *a; a++) {
 
-        if (r < 0) {
-                log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
-                return 0;
+                if (is_valid_documentation_url(*a))
+                        *(b++) = *a;
+                else {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Invalid URL, ignoring: %s", *a);
+                        free(*a);
+                }
         }
+        if (b)
+                *b = NULL;
 
-        return 0;
+        return r;
 }
 
-int config_parse_unit_memory_limit(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) {
-        Unit *u = data;
-        int r;
-        off_t sz;
-        char *t;
+static void syscall_set(uint32_t *p, int nr) {
+        nr = SYSCALL_TO_INDEX(nr);
+        p[nr >> 4] |= 1 << (nr & 31);
+}
+
+static void syscall_unset(uint32_t *p, int nr) {
+        nr = SYSCALL_TO_INDEX(nr);
+        p[nr >> 4] &= ~(1 << (nr & 31));
+}
+
+int config_parse_syscall_filter(const char *unit,
+                                const char *filename,
+                                unsigned line,
+                                const char *section,
+                                const char *lvalue,
+                                int ltype,
+                                const char *rvalue,
+                                void *data,
+                                void *userdata) {
+
+        ExecContext *c = data;
+        Unit *u = userdata;
+        bool invert = false;
+        char *w;
+        size_t l;
+        char *state;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
-        assert(data);
+        assert(u);
 
-        if (parse_bytes(rvalue, &sz) < 0 || sz <= 0) {
-                log_error("[%s:%u] Failed to parse memory limit value, ignoring: %s", filename, line, rvalue);
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                free(c->syscall_filter);
+                c->syscall_filter = NULL;
                 return 0;
         }
 
-        if (asprintf(&t, "%llu", (unsigned long long) sz) < 0)
-                return -ENOMEM;
+        if (rvalue[0] == '~') {
+                invert = true;
+                rvalue++;
+        }
 
-        r = unit_add_cgroup_attribute(u,
-                                      "memory",
-                                      streq(lvalue, "MemorySoftLimit") ? "memory.soft_limit_in_bytes" : "memory.limit_in_bytes",
-                                      t, NULL);
-        free(t);
+        if (!c->syscall_filter) {
+                size_t n;
 
-        if (r < 0) {
-                log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
-                return 0;
+                n = (syscall_max() + 31) >> 4;
+                c->syscall_filter = new(uint32_t, n);
+                if (!c->syscall_filter)
+                        return log_oom();
+
+                memset(c->syscall_filter, invert ? 0xFF : 0, n * sizeof(uint32_t));
+
+                /* Add these by default */
+                syscall_set(c->syscall_filter, __NR_execve);
+                syscall_set(c->syscall_filter, __NR_rt_sigreturn);
+#ifdef __NR_sigreturn
+                syscall_set(c->syscall_filter, __NR_sigreturn);
+#endif
+                syscall_set(c->syscall_filter, __NR_exit_group);
+                syscall_set(c->syscall_filter, __NR_exit);
         }
 
-        return 0;
-}
+        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
+                int id;
+                _cleanup_free_ char *t = NULL;
 
-static int device_map(const char *controller, const char *name, const char *value, char **ret) {
-        char **l;
+                t = strndup(w, l);
+                if (!t)
+                        return log_oom();
 
-        assert(controller);
-        assert(name);
-        assert(value);
-        assert(ret);
+                id = syscall_from_name(t);
+                if (id < 0)  {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Failed to parse syscall, ignoring: %s", t);
+                        continue;
+                }
 
-        l = strv_split_quoted(value);
-        if (!l)
-                return -ENOMEM;
+                if (invert)
+                        syscall_unset(c->syscall_filter, id);
+                else
+                        syscall_set(c->syscall_filter, id);
+        }
 
-        assert(strv_length(l) >= 1);
+        c->no_new_privileges = true;
 
-        if (streq(l[0], "*")) {
+        return 0;
+}
 
-                if (asprintf(ret, "a *:*%s%s",
-                             isempty(l[1]) ? "" : " ", strempty(l[1])) < 0) {
-                        strv_free(l);
-                        return -ENOMEM;
-                }
+int config_parse_unit_slice(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
 
-        } else {
-                struct stat st;
+        _cleanup_free_ char *k = NULL;
+        Unit *u = userdata, *slice;
+        int r;
 
-                if (stat(l[0], &st) < 0) {
-                        log_warning("Couldn't stat device %s", l[0]);
-                        strv_free(l);
-                        return -errno;
-                }
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(u);
 
-                if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) {
-                        log_warning("%s is not a device.", l[0]);
-                        strv_free(l);
-                        return -ENODEV;
-                }
+        r = unit_name_printf(u, rvalue, &k);
+        if (r < 0)
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to resolve unit specifiers on %s. Ignoring.", rvalue);
+        if (!k) {
+                k = strdup(rvalue);
+                if (!k)
+                        return log_oom();
+        }
 
-                if (asprintf(ret, "%c %u:%u%s%s",
-                             S_ISCHR(st.st_mode) ? 'c' : 'b',
-                             major(st.st_rdev), minor(st.st_rdev),
-                             isempty(l[1]) ? "" : " ", strempty(l[1])) < 0) {
+        r = manager_load_unit(u->manager, k, NULL, NULL, &slice);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, -r,
+                           "Failed to load slice unit %s. Ignoring.", k);
+                return 0;
+        }
 
-                        strv_free(l);
-                        return -ENOMEM;
-                }
+        if (slice->type != UNIT_SLICE) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Slice unit %s is not a slice. Ignoring.", k);
+                return 0;
         }
 
-        strv_free(l);
+        unit_ref_set(&u->slice, slice);
         return 0;
 }
 
-int config_parse_unit_device_allow(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) {
-        Unit *u = data;
-        char **l;
+DEFINE_CONFIG_PARSE_ENUM(config_parse_device_policy, cgroup_device_policy, CGroupDevicePolicy, "Failed to parse device policy");
+
+int config_parse_cpu_shares(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        CGroupContext *c = data;
+        unsigned long lu;
         int r;
-        unsigned k;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
-        assert(data);
-
-        l = strv_split_quoted(rvalue);
-        if (!l)
-                return -ENOMEM;
 
-        k = strv_length(l);
-        if (k < 1 || k > 2) {
-                log_error("[%s:%u] Failed to parse device value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
+        if (isempty(rvalue)) {
+                c->cpu_shares = 1024;
                 return 0;
         }
 
-        if (!streq(l[0], "*") && !path_startswith(l[0], "/dev")) {
-                log_error("[%s:%u] Device node path not absolute, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
+        r = safe_atolu(rvalue, &lu);
+        if (r < 0 || lu <= 0) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "CPU shares '%s' invalid. Ignoring.", rvalue);
                 return 0;
         }
 
-        if (!isempty(l[1]) && !in_charset(l[1], "rwm")) {
-                log_error("[%s:%u] Device access string invalid, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
+        c->cpu_shares = lu;
+        return 0;
+}
+
+int config_parse_memory_limit(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        CGroupContext *c = data;
+        off_t bytes;
+        int r;
+
+        if (isempty(rvalue)) {
+                c->memory_limit = (uint64_t) -1;
                 return 0;
         }
-        strv_free(l);
 
-        r = unit_add_cgroup_attribute(u, "devices",
-                                      streq(lvalue, "DeviceAllow") ? "devices.allow" : "devices.deny",
-                                      rvalue, device_map);
+        assert_cc(sizeof(uint64_t) == sizeof(off_t));
 
+        r = parse_bytes(rvalue, &bytes);
         if (r < 0) {
-                log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Memory limit '%s' invalid. Ignoring.", rvalue);
                 return 0;
         }
 
+        c->memory_limit = (uint64_t) bytes;
         return 0;
 }
 
-static int blkio_map(const char *controller, const char *name, const char *value, char **ret) {
-        struct stat st;
-        char **l;
-        dev_t d;
-
-        assert(controller);
-        assert(name);
-        assert(value);
-        assert(ret);
+int config_parse_device_allow(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
 
-        l = strv_split_quoted(value);
-        if (!l)
-                return -ENOMEM;
+        _cleanup_free_ char *path = NULL;
+        CGroupContext *c = data;
+        CGroupDeviceAllow *a;
+        const char *m;
+        size_t n;
 
-        assert(strv_length(l) == 2);
+        if (isempty(rvalue)) {
+                while (c->device_allow)
+                        cgroup_context_free_device_allow(c, c->device_allow);
 
-        if (stat(l[0], &st) < 0) {
-                log_warning("Couldn't stat device %s", l[0]);
-                strv_free(l);
-                return -errno;
+                return 0;
         }
 
-        if (S_ISBLK(st.st_mode))
-                d = st.st_rdev;
-        else if (major(st.st_dev) != 0) {
-                /* If this is not a device node then find the block
-                 * device this file is stored on */
-                d = st.st_dev;
+        n = strcspn(rvalue, WHITESPACE);
+        path = strndup(rvalue, n);
+        if (!path)
+                return log_oom();
 
-                /* If this is a partition, try to get the originating
-                 * block device */
-                block_get_whole_disk(d, &d);
-        } else {
-                log_warning("%s is not a block device and file system block device cannot be determined or is not local.", l[0]);
-                strv_free(l);
-                return -ENODEV;
+        if (!path_startswith(path, "/dev")) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Invalid device node path '%s'. Ignoring.", path);
+                return 0;
         }
 
-        if (asprintf(ret, "%u:%u %s", major(d), minor(d), l[1]) < 0) {
-                strv_free(l);
-                return -ENOMEM;
+        m = rvalue + n + strspn(rvalue + n, WHITESPACE);
+        if (isempty(m))
+                m = "rwm";
+
+        if (!in_charset(m, "rwm")) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Invalid device rights '%s'. Ignoring.", m);
+                return 0;
         }
 
-        strv_free(l);
+        a = new0(CGroupDeviceAllow, 1);
+        if (!a)
+                return log_oom();
+
+        a->path = path;
+        path = NULL;
+        a->r = !!strchr(m, 'r');
+        a->w = !!strchr(m, 'w');
+        a->m = !!strchr(m, 'm');
+
+        LIST_PREPEND(CGroupDeviceAllow, device_allow, c->device_allow, a);
         return 0;
 }
 
-int config_parse_unit_blkio_weight(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) {
-        Unit *u = data;
+int config_parse_blockio_weight(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        CGroupContext *c = data;
+        unsigned long lu;
         int r;
-        unsigned long ul;
-        const char *device = NULL, *weight;
-        unsigned k;
-        char *t, **l;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
-        assert(data);
-
-        l = strv_split_quoted(rvalue);
-        if (!l)
-                return -ENOMEM;
-
-        k = strv_length(l);
-        if (k < 1 || k > 2) {
-                log_error("[%s:%u] Failed to parse weight value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
-                return 0;
-        }
-
-        if (k == 1)
-                weight = l[0];
-        else {
-                device = l[0];
-                weight = l[1];
-        }
 
-        if (device && !path_is_absolute(device)) {
-                log_error("[%s:%u] Failed to parse block device node value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
+        if (isempty(rvalue)) {
+                c->blockio_weight = 1000;
                 return 0;
         }
 
-        if (safe_atolu(weight, &ul) < 0 || ul < 10 || ul > 1000) {
-                log_error("[%s:%u] Failed to parse block IO weight value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
+        r = safe_atolu(rvalue, &lu);
+        if (r < 0 || lu < 10 || lu > 1000) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Block IO weight '%s' invalid. Ignoring.", rvalue);
                 return 0;
         }
 
-        if (device)
-                r = asprintf(&t, "%s %lu", device, ul);
-        else
-                r = asprintf(&t, "%lu", ul);
-        strv_free(l);
-
-        if (r < 0)
-                return -ENOMEM;
-
-        if (device)
-                r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight_device", t, blkio_map);
-        else
-                r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight", t, NULL);
-        free(t);
-
-        if (r < 0) {
-                log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
-                return 0;
-        }
+        c->blockio_weight = lu;
 
         return 0;
 }
 
-int config_parse_unit_blkio_bandwidth(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) {
-        Unit *u = data;
+int config_parse_blockio_device_weight(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_free_ char *path = NULL;
+        CGroupBlockIODeviceWeight *w;
+        CGroupContext *c = data;
+        unsigned long lu;
+        const char *weight;
+        size_t n;
         int r;
-        off_t bytes;
-        unsigned k;
-        char *t, **l;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
-        assert(data);
 
-        l = strv_split_quoted(rvalue);
-        if (!l)
-                return -ENOMEM;
+        if (isempty(rvalue)) {
+                while (c->blockio_device_weights)
+                        cgroup_context_free_blockio_device_weight(c, c->blockio_device_weights);
+
+                return 0;
+        }
 
-        k = strv_length(l);
-        if (k != 2) {
-                log_error("[%s:%u] Failed to parse bandwidth value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
+        n = strcspn(rvalue, WHITESPACE);
+        weight = rvalue + n;
+        if (!*weight) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Expected block device and device weight. Ignoring.");
                 return 0;
         }
 
-        if (!path_is_absolute(l[0])) {
-                log_error("[%s:%u] Failed to parse block device node value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
+        path = strndup(rvalue, n);
+        if (!path)
+                return log_oom();
+
+        if (!path_startswith(path, "/dev")) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Invalid device node path '%s'. Ignoring.", path);
                 return 0;
         }
 
-        if (parse_bytes(l[1], &bytes) < 0 || bytes <= 0) {
-                log_error("[%s:%u] Failed to parse block IO bandwith value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
+        weight += strspn(weight, WHITESPACE);
+        r = safe_atolu(weight, &lu);
+        if (r < 0 || lu < 10 || lu > 1000) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Block IO weight '%s' invalid. Ignoring.", rvalue);
                 return 0;
         }
 
-        r = asprintf(&t, "%s %llu", l[0], (unsigned long long) bytes);
-        strv_free(l);
 
-        if (r < 0)
-                return -ENOMEM;
+        w = new0(CGroupBlockIODeviceWeight, 1);
+        if (!w)
+                return log_oom();
 
-        r = unit_add_cgroup_attribute(u, "blkio",
-                                      streq(lvalue, "BlockIOReadBandwidth") ? "blkio.read_bps_device" : "blkio.write_bps_device",
-                                      t, blkio_map);
-        free(t);
+        w->path = path;
+        path = NULL;
 
-        if (r < 0) {
-                log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
-                return 0;
-        }
+        w->weight = lu;
 
+        LIST_PREPEND(CGroupBlockIODeviceWeight, device_weights, c->blockio_device_weights, w);
         return 0;
 }
 
-int config_parse_unit_requires_mounts_for(
+int config_parse_blockio_bandwidth(
+                const char *unit,
                 const char *filename,
                 unsigned line,
                 const char *section,
@@ -2042,24 +2249,70 @@ int config_parse_unit_requires_mounts_for(
                 void *data,
                 void *userdata) {
 
-        Unit *u = userdata;
+        _cleanup_free_ char *path = NULL;
+        CGroupBlockIODeviceBandwidth *b;
+        CGroupContext *c = data;
+        const char *bandwidth;
+        off_t bytes;
+        bool read;
+        size_t n;
         int r;
-        bool empty_before;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
-        assert(data);
 
-        empty_before = !u->requires_mounts_for;
+        read = streq("BlockIOReadBandwidth", lvalue);
 
-        r = config_parse_path_strv(filename, line, section, lvalue, ltype, rvalue, data, userdata);
+        if (isempty(rvalue)) {
+                CGroupBlockIODeviceBandwidth *next;
 
-        /* Make it easy to find units with requires_mounts set */
-        if (empty_before && u->requires_mounts_for)
-                LIST_PREPEND(Unit, has_requires_mounts_for, u->manager->has_requires_mounts_for, u);
+                LIST_FOREACH_SAFE (device_bandwidths, b, next, c->blockio_device_bandwidths)
+                        if (b->read == read)
+                                cgroup_context_free_blockio_device_bandwidth(c, b);
 
-        return r;
+                return 0;
+        }
+
+        n = strcspn(rvalue, WHITESPACE);
+        bandwidth = rvalue + n;
+        bandwidth += strspn(bandwidth, WHITESPACE);
+
+        if (!*bandwidth) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Expected space separated pair of device node and bandwidth. Ignoring.");
+                return 0;
+        }
+
+        path = strndup(rvalue, n);
+        if (!path)
+                return log_oom();
+
+        if (!path_startswith(path, "/dev")) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Invalid device node path '%s'. Ignoring.", path);
+                return 0;
+        }
+
+        r = parse_bytes(bandwidth, &bytes);
+        if (r < 0 || bytes <= 0) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Block IO Bandwidth '%s' invalid. Ignoring.", rvalue);
+                return 0;
+        }
+
+        b = new0(CGroupBlockIODeviceBandwidth, 1);
+        if (!b)
+                return log_oom();
+
+        b->path = path;
+        path = NULL;
+        b->bandwidth = (uint64_t) bytes;
+        b->read = read;
+
+        LIST_PREPEND(CGroupBlockIODeviceBandwidth, device_bandwidths, c->blockio_device_bandwidths, b);
+
+        return 0;
 }
 
 #define FOLLOW_MAX 8
@@ -2089,7 +2342,7 @@ static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
                 /* Add the file name we are currently looking at to
                  * the names of this unit, but only if it is a valid
                  * unit name. */
-                name = file_name_from_path(*filename);
+                name = path_get_file_name(*filename);
 
                 if (unit_name_is_valid(name, true)) {
 
@@ -2099,30 +2352,31 @@ static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
                                 if (!id)
                                         return -ENOMEM;
 
-                                r = set_put(names, id);
-                                if (r < 0) {
-                                        free(id);
+                                r = set_consume(names, id);
+                                if (r < 0)
                                         return r;
-                                }
                         }
                 }
 
                 /* Try to open the file name, but don't if its a symlink */
-                if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
+                fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+                if (fd >= 0)
                         break;
 
                 if (errno != ELOOP)
                         return -errno;
 
                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
-                if ((r = readlink_and_make_absolute(*filename, &target)) < 0)
+                r = readlink_and_make_absolute(*filename, &target);
+                if (r < 0)
                         return r;
 
                 free(*filename);
                 *filename = target;
         }
 
-        if (!(f = fdopen(fd, "re"))) {
+        f = fdopen(fd, "re");
+        if (!f) {
                 r = -errno;
                 close_nointr_nofail(fd);
                 return r;
@@ -2146,7 +2400,8 @@ static int merge_by_names(Unit **u, Set *names, const char *id) {
 
                 /* First try to merge in the other name into our
                  * unit */
-                if ((r = unit_merge_by_name(*u, k)) < 0) {
+                r = unit_merge_by_name(*u, k);
+                if (r < 0) {
                         Unit *other;
 
                         /* Hmm, we couldn't merge the other unit into
@@ -2156,11 +2411,13 @@ static int merge_by_names(Unit **u, Set *names, const char *id) {
                         other = manager_get_unit((*u)->manager, k);
                         free(k);
 
-                        if (other)
-                                if ((r = unit_merge(other, *u)) >= 0) {
+                        if (other) {
+                                r = unit_merge(other, *u);
+                                if (r >= 0) {
                                         *u = other;
                                         return merge_by_names(u, names, NULL);
                                 }
+                        }
 
                         return r;
                 }
@@ -2191,12 +2448,14 @@ static int load_from_path(Unit *u, const char *path) {
 
         if (path_is_absolute(path)) {
 
-                if (!(filename = strdup(path))) {
+                filename = strdup(path);
+                if (!filename) {
                         r = -ENOMEM;
                         goto finish;
                 }
 
-                if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
+                r = open_follow(&filename, &f, symlink_names, &id);
+                if (r < 0) {
                         free(filename);
                         filename = NULL;
 
@@ -2212,7 +2471,8 @@ static int load_from_path(Unit *u, const char *path) {
                         /* Instead of opening the path right away, we manually
                          * follow all symlinks and add their name to our unit
                          * name set while doing so */
-                        if (!(filename = path_make_absolute(path, *p))) {
+                        filename = path_make_absolute(path, *p);
+                        if (!filename) {
                                 r = -ENOMEM;
                                 goto finish;
                         }
@@ -2224,8 +2484,6 @@ static int load_from_path(Unit *u, const char *path) {
                                 r = open_follow(&filename, &f, symlink_names, &id);
 
                         if (r < 0) {
-                                char *sn;
-
                                 free(filename);
                                 filename = NULL;
 
@@ -2233,9 +2491,7 @@ static int load_from_path(Unit *u, const char *path) {
                                         goto finish;
 
                                 /* Empty the symlink names for the next run */
-                                while ((sn = set_steal_first(symlink_names)))
-                                        free(sn);
-
+                                set_clear_free(symlink_names);
                                 continue;
                         }
 
@@ -2250,7 +2506,8 @@ static int load_from_path(Unit *u, const char *path) {
         }
 
         merged = u;
-        if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
+        r = merge_by_names(&merged, symlink_names, id);
+        if (r < 0)
                 goto finish;
 
         if (merged != u) {
@@ -2259,7 +2516,6 @@ static int load_from_path(Unit *u, const char *path) {
                 goto finish;
         }
 
-        zero(st);
         if (fstat(fileno(f), &st) < 0) {
                 r = -errno;
                 goto finish;
@@ -2268,12 +2524,14 @@ static int load_from_path(Unit *u, const char *path) {
         if (null_or_empty(&st))
                 u->load_state = UNIT_MASKED;
         else {
+                u->load_state = UNIT_LOADED;
+
                 /* Now, parse the file contents */
-                r = config_parse(filename, f, UNIT_VTABLE(u)->sections, config_item_perf_lookup, (void*) load_fragment_gperf_lookup, false, u);
+                r = config_parse(u->id, filename, f, UNIT_VTABLE(u)->sections,
+                                 config_item_perf_lookup,
+                                 (void*) load_fragment_gperf_lookup, false, true, u);
                 if (r < 0)
                         goto finish;
-
-                u->load_state = UNIT_LOADED;
         }
 
         free(u->fragment_path);
@@ -2282,6 +2540,13 @@ static int load_from_path(Unit *u, const char *path) {
 
         u->fragment_mtime = timespec_load(&st.st_mtim);
 
+        if (u->source_path) {
+                if (stat(u->source_path, &st) >= 0)
+                        u->source_mtime = timespec_load(&st.st_mtim);
+                else
+                        u->source_mtime = 0;
+        }
+
         r = 0;
 
 finish:
@@ -2306,7 +2571,8 @@ int unit_load_fragment(Unit *u) {
         /* First, try to find the unit under its id. We always look
          * for unit files in the default directories, to make it easy
          * to override things by placing things in /etc/systemd/system */
-        if ((r = load_from_path(u, u->id)) < 0)
+        r = load_from_path(u, u->id);
+        if (r < 0)
                 return r;
 
         /* Try to find an alias we can load this with */
@@ -2316,7 +2582,8 @@ int unit_load_fragment(Unit *u) {
                         if (t == u->id)
                                 continue;
 
-                        if ((r = load_from_path(u, t)) < 0)
+                        r = load_from_path(u, t);
+                        if (r < 0)
                                 return r;
 
                         if (u->load_state != UNIT_STUB)
@@ -2326,7 +2593,8 @@ int unit_load_fragment(Unit *u) {
         /* And now, try looking for it under the suggested (originally linked) path */
         if (u->load_state == UNIT_STUB && u->fragment_path) {
 
-                if ((r = load_from_path(u, u->fragment_path)) < 0)
+                r = load_from_path(u, u->fragment_path);
+                if (r < 0)
                         return r;
 
                 if (u->load_state == UNIT_STUB) {
@@ -2342,7 +2610,8 @@ int unit_load_fragment(Unit *u) {
         if (u->load_state == UNIT_STUB && u->instance) {
                 char *k;
 
-                if (!(k = unit_name_template(u->id)))
+                k = unit_name_template(u->id);
+                if (!k)
                         return -ENOMEM;
 
                 r = load_from_path(u, k);
@@ -2357,7 +2626,8 @@ int unit_load_fragment(Unit *u) {
                                 if (t == u->id)
                                         continue;
 
-                                if (!(k = unit_name_template(t)))
+                                k = unit_name_template(t);
+                                if (!k)
                                         return -ENOMEM;
 
                                 r = load_from_path(u, k);
@@ -2402,12 +2672,9 @@ void unit_dump_config_items(FILE *f) {
                 { config_parse_level,                 "LEVEL" },
                 { config_parse_exec_capabilities,     "CAPABILITIES" },
                 { config_parse_exec_secure_bits,      "SECUREBITS" },
-                { config_parse_exec_bounding_set,     "BOUNDINGSET" },
-                { config_parse_exec_timer_slack_nsec, "TIMERSLACK" },
+                { config_parse_bounding_set,          "BOUNDINGSET" },
                 { config_parse_limit,                 "LIMIT" },
-                { config_parse_unit_cgroup,           "CGROUP [...]" },
                 { config_parse_unit_deps,             "UNIT [...]" },
-                { config_parse_unit_names,            "UNIT [...]" },
                 { config_parse_exec,                  "PATH [ARGUMENT [...]]" },
                 { config_parse_service_type,          "SERVICETYPE" },
                 { config_parse_service_restart,       "SERVICERESTART" },
@@ -2421,20 +2688,38 @@ void unit_dump_config_items(FILE *f) {
                 { config_parse_socket_listen,         "SOCKET [...]" },
                 { config_parse_socket_bind,           "SOCKETBIND" },
                 { config_parse_socket_bindtodevice,   "NETWORKINTERFACE" },
-                { config_parse_usec,                  "SECONDS" },
+                { config_parse_sec,                   "SECONDS" },
+                { config_parse_nsec,                  "NANOSECONDS" },
                 { config_parse_path_strv,             "PATH [...]" },
                 { config_parse_unit_requires_mounts_for, "PATH [...]" },
                 { config_parse_exec_mount_flags,      "MOUNTFLAG [...]" },
                 { config_parse_unit_string_printf,    "STRING" },
+                { config_parse_trigger_unit,          "UNIT" },
                 { config_parse_timer,                 "TIMER" },
-                { config_parse_timer_unit,            "NAME" },
                 { config_parse_path_spec,             "PATH" },
-                { config_parse_path_unit,             "UNIT" },
                 { config_parse_notify_access,         "ACCESS" },
                 { config_parse_ip_tos,                "TOS" },
                 { config_parse_unit_condition_path,   "CONDITION" },
                 { config_parse_unit_condition_string, "CONDITION" },
                 { config_parse_unit_condition_null,   "CONDITION" },
+                { config_parse_unit_slice,            "SLICE" },
+                { config_parse_documentation,         "URL" },
+                { config_parse_service_timeout,       "SECONDS" },
+                { config_parse_start_limit_action,    "ACTION" },
+                { config_parse_set_status,            "STATUS" },
+                { config_parse_service_sockets,       "SOCKETS" },
+                { config_parse_fsck_passno,           "PASSNO" },
+                { config_parse_environ,               "ENVIRON" },
+                { config_parse_syscall_filter,        "SYSCALL" },
+                { config_parse_cpu_shares,            "SHARES" },
+                { config_parse_memory_limit,          "LIMIT" },
+                { config_parse_device_allow,          "DEVICE" },
+                { config_parse_device_policy,         "POLICY" },
+                { config_parse_blockio_bandwidth,     "BANDWIDTH" },
+                { config_parse_blockio_weight,        "WEIGHT" },
+                { config_parse_blockio_device_weight, "DEVICEWEIGHT" },
+                { config_parse_long,                  "LONG" },
+                { config_parse_socket_service,        "SERVICE" },
         };
 
         const char *prev = NULL;
@@ -2456,7 +2741,7 @@ void unit_dump_config_items(FILE *f) {
                 prefix_len = dot-i;
 
                 if (dot)
-                        if (!prev || strncmp(prev, i, prefix_len+1) != 0) {
+                        if (!prev || !strneq(prev, i, prefix_len+1)) {
                                 if (prev)
                                         fputc('\n', f);