X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Fload-fragment.c;h=6e333aaf1599cd3a91f1d202d39b412da25716be;hp=2504d730dc43694aafa415abe78e8d614e33e100;hb=641906e9366891e0ad3e6e38b7396a427678c4cf;hpb=5198dabcce9da535c4531b53990cfa11bd9f7896

diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 2504d730d..6e333aaf1 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -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
@@ -47,6 +48,7 @@
 #include "utf8.h"
 #include "path-util.h"
 #include "syscall-list.h"
+#include "env-util.h"
 
 #ifndef HAVE_SYSV_COMPAT
 int config_parse_warn_compat(
@@ -85,23 +87,21 @@ int config_parse_unit_deps(
         assert(rvalue);
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+                char _cleanup_free_ *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;
+                        return log_oom();
 
                 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);
+                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s",
+                                  filename, line, k, strerror(-r));
         }
 
         return 0;
@@ -118,8 +118,7 @@ int config_parse_unit_string_printf(
                 void *userdata) {
 
         Unit *u = userdata;
-        char *k;
-        int r;
+        _cleanup_free_ char *k = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -128,12 +127,9 @@ int config_parse_unit_string_printf(
 
         k = unit_full_printf(u, rvalue);
         if (!k)
-                return -ENOMEM;
-
-        r = config_parse_string(filename, line, section, lvalue, ltype, k, data, userdata);
-        free (k);
+                return log_oom();
 
-        return r;
+        return config_parse_string(filename, line, section, lvalue, ltype, k, data, userdata);
 }
 
 int config_parse_unit_strv_printf(
@@ -147,8 +143,7 @@ int config_parse_unit_strv_printf(
                 void *userdata) {
 
         Unit *u = userdata;
-        char *k;
-        int r;
+        _cleanup_free_ char *k = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -157,12 +152,9 @@ int config_parse_unit_strv_printf(
 
         k = unit_full_printf(u, rvalue);
         if (!k)
-                return -ENOMEM;
-
-        r = config_parse_strv(filename, line, section, lvalue, ltype, k, data, userdata);
-        free(k);
+                return log_oom();
 
-        return r;
+        return config_parse_strv(filename, line, section, lvalue, ltype, k, data, userdata);
 }
 
 int config_parse_unit_path_printf(
@@ -176,8 +168,7 @@ int config_parse_unit_path_printf(
                 void *userdata) {
 
         Unit *u = userdata;
-        char *k;
-        int r;
+        _cleanup_free_ char *k = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -188,10 +179,7 @@ int config_parse_unit_path_printf(
         if (!k)
                 return log_oom();
 
-        r = config_parse_path(filename, line, section, lvalue, ltype, k, data, userdata);
-        free(k);
-
-        return r;
+        return config_parse_path(filename, line, section, lvalue, ltype, k, data, userdata);
 }
 
 int config_parse_socket_listen(
@@ -214,50 +202,39 @@ 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);
-
-        } else if (streq(lvalue, "ListenMessageQueue")) {
+                return log_oom();
 
-                p->type = SOCKET_MQUEUE;
+        if (ltype != SOCKET_SOCKET) {
 
-                if (!(p->path = unit_full_printf(UNIT(s), rvalue))) {
+                p->type = ltype;
+                p->path = unit_full_printf(UNIT(s), rvalue);
+                if (!p->path) {
                         free(p);
-                        return -ENOMEM;
+                        return log_oom();
                 }
 
                 path_kill_slashes(p->path);
 
         } else if (streq(lvalue, "ListenNetlink")) {
-                char  *k;
+                _cleanup_free_ char  *k = NULL;
                 int r;
 
                 p->type = SOCKET_SOCKET;
                 k = unit_full_printf(UNIT(s), rvalue);
-                r = socket_address_parse_netlink(&p->address, k);
-                free(k);
+                if (!k) {
+                        free(p);
+                        return log_oom();
+                }
 
+                r = socket_address_parse_netlink(&p->address, k);
                 if (r < 0) {
                         log_error("[%s:%u] Failed to parse address value, ignoring: %s", filename, line, rvalue);
                         free(p);
@@ -265,14 +242,17 @@ int config_parse_socket_listen(
                 }
 
         } else {
-                char *k;
+                _cleanup_free_ char *k = NULL;
                 int r;
 
                 p->type = SOCKET_SOCKET;
                 k = unit_full_printf(UNIT(s), rvalue);
-                r = socket_address_parse(&p->address, k);
-                free(k);
+                if (!k) {
+                        free(p);
+                        return log_oom();
+                }
 
+                r = socket_address_parse(&p->address, k);
                 if (r < 0) {
                         log_error("[%s:%u] Failed to parse address value, ignoring: %s", filename, line, rvalue);
                         free(p);
@@ -431,13 +411,20 @@ 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;
@@ -452,24 +439,27 @@ 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_error("[%s:%u] Executable path is not absolute, ignoring: %s",
+                                  filename, line, 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++;
@@ -477,19 +467,21 @@ 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;
                                 }
 
@@ -504,7 +496,7 @@ int config_parse_exec(
 
                                 c = n[k++] = cunescape_length(w, l);
                                 if (!c) {
-                                        r = -ENOMEM;
+                                        r = log_oom();
                                         goto fail;
                                 }
 
@@ -527,7 +519,7 @@ int config_parse_exec(
                 if (!path) {
                         path = strdup(n[0]);
                         if (!path) {
-                                r = -ENOMEM;
+                                r = log_oom();
                                 goto fail;
                         }
                 }
@@ -536,7 +528,7 @@ int config_parse_exec(
 
                 nce = new0(ExecCommand, 1);
                 if (!nce) {
-                        r = -ENOMEM;
+                        r = log_oom();
                         goto fail;
                 }
 
@@ -584,8 +576,9 @@ 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;
 
@@ -616,7 +609,8 @@ int config_parse_exec_io_class(
         assert(rvalue);
         assert(data);
 
-        if ((x = ioprio_class_from_string(rvalue)) < 0) {
+        x = ioprio_class_from_string(rvalue);
+        if (x < 0) {
                 log_error("[%s:%u] Failed to parse IO scheduling class, ignoring: %s", filename, line, rvalue);
                 return 0;
         }
@@ -675,12 +669,15 @@ int config_parse_exec_cpu_sched_policy(
         assert(rvalue);
         assert(data);
 
-        if ((x = sched_policy_from_string(rvalue)) < 0) {
+        x = sched_policy_from_string(rvalue);
+        if (x < 0) {
                 log_error("[%s:%u] Failed to parse CPU scheduling policy, ignoring: %s", filename, line, rvalue);
                 return 0;
         }
 
         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;
@@ -697,19 +694,27 @@ int config_parse_exec_cpu_sched_prio(
                 void *userdata) {
 
         ExecContext *c = data;
-        int i;
+        int i, min, max;
 
         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)) {
+        if (safe_atoi(rvalue, &i) < 0) {
                 log_error("[%s:%u] Failed to parse CPU scheduling priority, ignoring: %s", filename, line, rvalue);
                 return 0;
         }
 
+        /* 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);
+
+        if (i < min || i > max) {
+                log_error("[%s:%u] CPU scheduling priority is out of range, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
+
         c->cpu_sched_priority = i;
         c->cpu_sched_set = true;
 
@@ -736,23 +741,34 @@ 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;
+                char _cleanup_free_ *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_error("[%s:%u] Failed to parse CPU affinity %s, ignoring: %s",
+                                  filename, line, t, rvalue);
                         return 0;
                 }
 
@@ -780,9 +796,10 @@ int config_parse_exec_capabilities(
         assert(rvalue);
         assert(data);
 
-        if (!(cap = cap_from_text(rvalue))) {
+        cap = cap_from_text(rvalue);
+        if (!cap) {
                 if (errno == ENOMEM)
-                        return -ENOMEM;
+                        return log_oom();
 
                 log_error("[%s:%u] Failed to parse capabilities, ignoring: %s", filename, line, rvalue);
                 return 0;
@@ -815,6 +832,12 @@ 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;
@@ -829,7 +852,8 @@ int config_parse_exec_secure_bits(
                 else if (first_word(w, "noroot-locked"))
                         c->secure_bits |= SECURE_NOROOT_LOCKED;
                 else {
-                        log_error("[%s:%u] Failed to parse secure bits, ignoring: %s", filename, line, rvalue);
+                        log_error("[%s:%u] Failed to parse secure bits, ignoring: %s",
+                                  filename, line, rvalue);
                         return 0;
                 }
         }
@@ -859,6 +883,12 @@ int config_parse_bounding_set(
         assert(rvalue);
         assert(data);
 
+        if (isempty(rvalue)) {
+                /* An empty assignment resets */
+                *capability_bounding_set_drop = 0;
+                return 0;
+        }
+
         if (rvalue[0] == '~') {
                 invert = true;
                 rvalue++;
@@ -870,19 +900,18 @@ int config_parse_bounding_set(
          * interface. */
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t;
+                char _cleanup_free_ *t = NULL;
                 int r;
                 cap_value_t cap;
 
                 t = strndup(w, l);
                 if (!t)
-                        return -ENOMEM;
+                        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);
+                        log_error("[%s:%u] Failed to parse capability in bounding set, ignoring: %s",
+                                  filename, line, t);
                         continue;
                 }
 
@@ -924,9 +953,11 @@ int config_parse_limit(
                 return 0;
         }
 
-        if (!*rl)
-                if (!(*rl = new(struct rlimit, 1)))
-                        return -ENOMEM;
+        if (!*rl) {
+                *rl = new(struct rlimit, 1);
+                if (!*rl)
+                        return log_oom();
+        }
 
         (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
         return 0;
@@ -947,31 +978,33 @@ int config_parse_unit_cgroup(
         size_t l;
         char *state;
 
+        if (isempty(rvalue)) {
+                /* An empty assignment resets the list */
+                cgroup_bonding_free_list(u->cgroup_bondings, false);
+                u->cgroup_bondings = NULL;
+                return 0;
+        }
+
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+                char _cleanup_free_ *t = NULL, *k = NULL, *ku = NULL;
                 int r;
 
                 t = strndup(w, l);
                 if (!t)
-                        return -ENOMEM;
+                        return log_oom();
 
                 k = unit_full_printf(u, t);
-                free(t);
-
                 if (!k)
-                        return -ENOMEM;
+                        return log_oom();
 
-                t = cunescape(k);
-                free(k);
-
-                if (!t)
-                        return -ENOMEM;
-
-                r = unit_add_cgroup_from_text(u, t);
-                free(t);
+                ku = cunescape(k);
+                if (!ku)
+                        return log_oom();
 
+                r = unit_add_cgroup_from_text(u, ku, true, NULL);
                 if (r < 0) {
-                        log_error("[%s:%u] Failed to parse cgroup value, ignoring: %s", filename, line, rvalue);
+                        log_error("[%s:%u] Failed to parse cgroup value %s, ignoring: %s",
+                                  filename, line, k, rvalue);
                         return 0;
                 }
         }
@@ -1055,7 +1088,8 @@ int config_parse_kill_signal(
         assert(rvalue);
         assert(sig);
 
-        if ((r = signal_from_string_try_harder(rvalue)) <= 0) {
+        r = signal_from_string_try_harder(rvalue);
+        if (r <= 0) {
                 log_error("[%s:%u] Failed to parse kill signal, ignoring: %s", filename, line, rvalue);
                 return 0;
         }
@@ -1085,15 +1119,22 @@ 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) {
+                char _cleanup_free_ *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_error("[%s:%u] Failed to parse mount flag %s, ignoring: %s",
+                                  filename, line, t, rvalue);
                         return 0;
                 }
         }
@@ -1113,30 +1154,53 @@ int config_parse_timer(
                 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_error("[%s:%u] Failed to parse timer base, ignoring: %s", filename, line, lvalue);
                 return 0;
         }
 
-        if (!(v = new0(TimerValue, 1)))
-                return -ENOMEM;
+        if (b == TIMER_CALENDAR) {
+                if (calendar_spec_from_string(rvalue, &c) < 0) {
+                        log_error("[%s:%u] Failed to parse calendar specification, ignoring: %s", filename, line, rvalue);
+                        return 0;
+                }
+
+                id = CLOCK_REALTIME;
+        } else {
+                if (parse_usec(rvalue, &u) < 0) {
+                        log_error("[%s:%u] Failed to parse timer value, ignoring: %s", filename, line, 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);
 
@@ -1157,6 +1221,7 @@ int config_parse_timer_unit(
         int r;
         DBusError error;
         Unit *u;
+        _cleanup_free_ char *p = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1165,12 +1230,16 @@ int config_parse_timer_unit(
 
         dbus_error_init(&error);
 
-        if (endswith(rvalue, ".timer")) {
+        p = unit_name_printf(UNIT(t), rvalue);
+        if (!p)
+                return log_oom();
+
+        if (endswith(p, ".timer")) {
                 log_error("[%s:%u] Unit cannot be of type timer, ignoring: %s", filename, line, rvalue);
                 return 0;
         }
 
-        r = manager_load_unit(UNIT(t)->manager, rvalue, NULL, NULL, &u);
+        r = manager_load_unit(UNIT(t)->manager, p, 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);
@@ -1202,6 +1271,12 @@ int config_parse_path_spec(
         assert(rvalue);
         assert(data);
 
+        if (isempty(rvalue)) {
+                /* Empty assignment clears list */
+                path_free_specs(p);
+                return 0;
+        }
+
         b = path_type_from_string(lvalue);
         if (b < 0) {
                 log_error("[%s:%u] Failed to parse path type, ignoring: %s", filename, line, lvalue);
@@ -1247,6 +1322,7 @@ int config_parse_path_unit(
         int r;
         DBusError error;
         Unit *u;
+        _cleanup_free_ char *p = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1255,13 +1331,18 @@ int config_parse_path_unit(
 
         dbus_error_init(&error);
 
-        if (endswith(rvalue, ".path")) {
-                log_error("[%s:%u] Unit cannot be of type path, ignoring: %s", filename, line, rvalue);
+        p = unit_name_printf(UNIT(t), rvalue);
+        if (!p)
+                return log_oom();
+
+        if (endswith(p, ".path")) {
+                log_error("[%s:%u] Unit cannot be of type path, ignoring: %s", filename, line, p);
                 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));
+        r = manager_load_unit(UNIT(t)->manager, p, NULL, &error, &u);
+        if (r < 0) {
+                log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, p, bus_error(&error, r));
                 dbus_error_free(&error);
                 return 0;
         }
@@ -1285,6 +1366,7 @@ int config_parse_socket_service(
         int r;
         DBusError error;
         Unit *x;
+        _cleanup_free_ char *p = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1293,12 +1375,16 @@ int config_parse_socket_service(
 
         dbus_error_init(&error);
 
-        if (!endswith(rvalue, ".service")) {
+        p = unit_name_printf(UNIT(s), rvalue);
+        if (!p)
+                return log_oom();
+
+        if (!endswith(p, ".service")) {
                 log_error("[%s:%u] Unit must be of type service, ignoring: %s", filename, line, rvalue);
                 return 0;
         }
 
-        r = manager_load_unit(UNIT(s)->manager, rvalue, NULL, &error, &x);
+        r = manager_load_unit(UNIT(s)->manager, p, NULL, &error, &x);
         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);
@@ -1331,33 +1417,30 @@ int config_parse_service_sockets(
         assert(data);
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *t, *k;
+                char _cleanup_free_ *t = NULL, *k = NULL;
 
                 t = strndup(w, l);
                 if (!t)
-                        return -ENOMEM;
+                        return log_oom();
 
                 k = unit_name_printf(UNIT(s), t);
-                free(t);
-
                 if (!k)
-                        return -ENOMEM;
+                        return log_oom();
 
                 if (!endswith(k, ".socket")) {
-                        log_error("[%s:%u] Unit must be of type socket, ignoring: %s", filename, line, rvalue);
-                        free(k);
+                        log_error("[%s:%u] Unit must be of type socket, ignoring: %s",
+                                  filename, line, k);
                         continue;
                 }
 
                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_WANTS, UNIT_AFTER, k, NULL, true);
                 if (r < 0)
-                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", filename, line, k, strerror(-r));
+                        log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s",
+                                  filename, line, k, strerror(-r));
 
                 r = unit_add_dependency_by_name(UNIT(s), UNIT_TRIGGERED_BY, k, NULL, true);
                 if (r < 0)
                         return r;
-
-                free(k);
         }
 
         return 0;
@@ -1382,8 +1465,7 @@ int config_parse_service_timeout(
         assert(s);
 
         r = config_parse_usec(filename, line, section, lvalue, ltype, rvalue, data, userdata);
-
-        if (r)
+        if (r < 0)
                 return r;
 
         if (streq(lvalue, "TimeoutSec")) {
@@ -1405,32 +1487,90 @@ int config_parse_unit_env_file(
                 void *data,
                 void *userdata) {
 
-        char ***env = data, **k;
+        char ***env = data;
         Unit *u = userdata;
-        char *s;
+        _cleanup_free_ char *s = NULL;
+        int r;
 
         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
+        if (isempty(rvalue)) {
+                /* Empty assignment frees the list */
+                strv_free(*env);
+                *env = NULL;
+                return 0;
+        }
+
         s = unit_full_printf(u, rvalue);
         if (!s)
-                return -ENOMEM;
+                return log_oom();
 
         if (!path_is_absolute(s[0] == '-' ? s + 1 : s)) {
                 log_error("[%s:%u] Path '%s' is not absolute, ignoring.", filename, line, s);
-                free(s);
                 return 0;
         }
 
-        k = strv_append(*env, s);
-        free(s);
+        r = strv_extend(env, s);
+        if (r < 0)
+                return log_oom();
+
+        return 0;
+}
+
+int config_parse_environ(
+                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;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(u);
+
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                strv_free(*env);
+                *env = NULL;
+                return 0;
+        }
+
+        k = unit_full_printf(u, rvalue);
         if (!k)
-                return -ENOMEM;
+                return log_oom();
+
+        FOREACH_WORD_QUOTED(w, l, k, state) {
+                _cleanup_free_ char *n;
+                char **x;
+
+                n = cunescape_length(w, l);
+                if (!n)
+                        return log_oom();
+
+                if (!env_assignment_is_valid(n)) {
+                        log_error("[%s:%u] Invalid environment assignment, ignoring: %s", filename, line, rvalue);
+                        continue;
+                }
+
+                x = strv_env_set(*env, n);
+                if (!x)
+                        return log_oom();
 
-        strv_free(*env);
-        *env = k;
+                strv_free(*env);
+                *env = x;
+        }
 
         return 0;
 }
@@ -1452,11 +1592,11 @@ 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_error("[%s:%u] Failed to parse IP TOS value, ignoring: %s", filename, line, rvalue);
+                return 0;
+        }
 
         *ip_tos = x;
         return 0;
@@ -1483,6 +1623,13 @@ int config_parse_unit_condition_path(
         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++;
@@ -1493,7 +1640,7 @@ int config_parse_unit_condition_path(
 
         p = unit_full_printf(u, rvalue);
         if (!p)
-                return -ENOMEM;
+                return log_oom();
 
         if (!path_is_absolute(p)) {
                 log_error("[%s:%u] Path in condition not absolute, ignoring: %s", filename, line, p);
@@ -1502,7 +1649,7 @@ int config_parse_unit_condition_path(
 
         c = condition_new(cond, p, trigger, negate);
         if (!c)
-                return -ENOMEM;
+                return log_oom();
 
         LIST_PREPEND(Condition, conditions, u->conditions, c);
         return 0;
@@ -1529,6 +1676,13 @@ int config_parse_unit_condition_string(
         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++;
@@ -1539,7 +1693,7 @@ int config_parse_unit_condition_string(
 
         s = unit_full_printf(u, rvalue);
         if (!s)
-                return -ENOMEM;
+                return log_oom();
 
         c = condition_new(cond, s, trigger, negate);
         if (!c)
@@ -1569,13 +1723,23 @@ 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) {
+        b = parse_boolean(rvalue);
+        if (b < 0) {
                 log_error("[%s:%u] Failed to parse boolean value in condition, ignoring: %s", filename, line, rvalue);
                 return 0;
         }
@@ -1583,8 +1747,9 @@ int config_parse_unit_condition_null(
         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;
@@ -1604,7 +1769,7 @@ int config_parse_unit_cgroup_attr(
                 void *userdata) {
 
         Unit *u = data;
-        char **l;
+        _cleanup_strv_free_ char **l = NULL;
         int r;
 
         assert(filename);
@@ -1612,19 +1777,23 @@ int config_parse_unit_cgroup_attr(
         assert(rvalue);
         assert(data);
 
+        if (isempty(rvalue)) {
+                /* Empty assignment clears the list */
+                cgroup_attribute_free_list(u->cgroup_attributes);
+                u->cgroup_attributes = NULL;
+                return 0;
+        }
+
         l = strv_split_quoted(rvalue);
         if (!l)
-                return -ENOMEM;
+                return log_oom();
 
         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;
         }
 
-        r = unit_add_cgroup_attribute(u, NULL, l[0], l[1], NULL);
-        strv_free(l);
-
+        r = unit_add_cgroup_attribute(u, NULL, l[0], l[1], NULL, NULL);
         if (r < 0) {
                 log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
                 return 0;
@@ -1637,7 +1806,7 @@ int config_parse_unit_cpu_shares(const char *filename, unsigned line, const char
         Unit *u = data;
         int r;
         unsigned long ul;
-        char *t;
+        _cleanup_free_ char *t = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1650,11 +1819,9 @@ int config_parse_unit_cpu_shares(const char *filename, unsigned line, const char
         }
 
         if (asprintf(&t, "%lu", ul) < 0)
-                return -ENOMEM;
-
-        r = unit_add_cgroup_attribute(u, "cpu", "cpu.shares", t, NULL);
-        free(t);
+                return log_oom();
 
+        r = unit_add_cgroup_attribute(u, "cpu", "cpu.shares", t, NULL, NULL);
         if (r < 0) {
                 log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
                 return 0;
@@ -1667,7 +1834,7 @@ int config_parse_unit_memory_limit(const char *filename, unsigned line, const ch
         Unit *u = data;
         int r;
         off_t sz;
-        char *t;
+        _cleanup_free_ char *t = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1680,14 +1847,12 @@ int config_parse_unit_memory_limit(const char *filename, unsigned line, const ch
         }
 
         if (asprintf(&t, "%llu", (unsigned long long) sz) < 0)
-                return -ENOMEM;
+                return log_oom();
 
         r = unit_add_cgroup_attribute(u,
                                       "memory",
                                       streq(lvalue, "MemorySoftLimit") ? "memory.soft_limit_in_bytes" : "memory.limit_in_bytes",
-                                      t, NULL);
-        free(t);
-
+                                      t, NULL, NULL);
         if (r < 0) {
                 log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
                 return 0;
@@ -1697,7 +1862,7 @@ int config_parse_unit_memory_limit(const char *filename, unsigned line, const ch
 }
 
 static int device_map(const char *controller, const char *name, const char *value, char **ret) {
-        char **l;
+        _cleanup_strv_free_ char **l = NULL;
 
         assert(controller);
         assert(name);
@@ -1713,43 +1878,34 @@ static int device_map(const char *controller, const char *name, const char *valu
         if (streq(l[0], "*")) {
 
                 if (asprintf(ret, "a *:*%s%s",
-                             isempty(l[1]) ? "" : " ", strempty(l[1])) < 0) {
-                        strv_free(l);
+                             isempty(l[1]) ? "" : " ", strempty(l[1])) < 0)
                         return -ENOMEM;
-                }
-
         } else {
                 struct stat st;
 
                 if (stat(l[0], &st) < 0) {
                         log_warning("Couldn't stat device %s", l[0]);
-                        strv_free(l);
                         return -errno;
                 }
 
                 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;
                 }
 
                 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) {
-
-                        strv_free(l);
+                             isempty(l[1]) ? "" : " ", strempty(l[1])) < 0)
                         return -ENOMEM;
-                }
         }
 
-        strv_free(l);
         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;
+        _cleanup_strv_free_ char **l = NULL;
         int r;
         unsigned k;
 
@@ -1760,31 +1916,27 @@ int config_parse_unit_device_allow(const char *filename, unsigned line, const ch
 
         l = strv_split_quoted(rvalue);
         if (!l)
-                return -ENOMEM;
+                return log_oom();
 
         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);
                 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);
                 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);
                 return 0;
         }
-        strv_free(l);
 
         r = unit_add_cgroup_attribute(u, "devices",
                                       streq(lvalue, "DeviceAllow") ? "devices.allow" : "devices.deny",
-                                      rvalue, device_map);
+                                      rvalue, device_map, NULL);
 
         if (r < 0) {
                 log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
@@ -1796,7 +1948,7 @@ int config_parse_unit_device_allow(const char *filename, unsigned line, const ch
 
 static int blkio_map(const char *controller, const char *name, const char *value, char **ret) {
         struct stat st;
-        char **l;
+        _cleanup_strv_free_ char **l = NULL;
         dev_t d;
 
         assert(controller);
@@ -1806,13 +1958,12 @@ static int blkio_map(const char *controller, const char *name, const char *value
 
         l = strv_split_quoted(value);
         if (!l)
-                return -ENOMEM;
+                return log_oom();
 
         assert(strv_length(l) == 2);
 
         if (stat(l[0], &st) < 0) {
                 log_warning("Couldn't stat device %s", l[0]);
-                strv_free(l);
                 return -errno;
         }
 
@@ -1828,16 +1979,12 @@ static int blkio_map(const char *controller, const char *name, const char *value
                 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 (asprintf(ret, "%u:%u %s", major(d), minor(d), l[1]) < 0) {
-                strv_free(l);
+        if (asprintf(ret, "%u:%u %s", major(d), minor(d), l[1]) < 0)
                 return -ENOMEM;
-        }
 
-        strv_free(l);
         return 0;
 }
 
@@ -1847,7 +1994,8 @@ int config_parse_unit_blkio_weight(const char *filename, unsigned line, const ch
         unsigned long ul;
         const char *device = NULL, *weight;
         unsigned k;
-        char *t, **l;
+        _cleanup_free_ char *t = NULL;
+        _cleanup_strv_free_ char **l = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1856,12 +2004,11 @@ int config_parse_unit_blkio_weight(const char *filename, unsigned line, const ch
 
         l = strv_split_quoted(rvalue);
         if (!l)
-                return -ENOMEM;
+                return log_oom();
 
         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;
         }
 
@@ -1874,13 +2021,11 @@ int config_parse_unit_blkio_weight(const char *filename, unsigned line, const ch
 
         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);
                 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);
                 return 0;
         }
 
@@ -1888,17 +2033,13 @@ int config_parse_unit_blkio_weight(const char *filename, unsigned line, const ch
                 r = asprintf(&t, "%s %lu", device, ul);
         else
                 r = asprintf(&t, "%lu", ul);
-        strv_free(l);
-
         if (r < 0)
-                return -ENOMEM;
+                return log_oom();
 
         if (device)
-                r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight_device", t, blkio_map);
+                r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight_device", t, blkio_map, NULL);
         else
-                r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight", t, NULL);
-        free(t);
-
+                r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight", t, NULL, NULL);
         if (r < 0) {
                 log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
                 return 0;
@@ -1912,7 +2053,8 @@ int config_parse_unit_blkio_bandwidth(const char *filename, unsigned line, const
         int r;
         off_t bytes;
         unsigned k;
-        char *t, **l;
+        _cleanup_free_ char *t = NULL;
+        _cleanup_strv_free_ char **l = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1921,38 +2063,31 @@ int config_parse_unit_blkio_bandwidth(const char *filename, unsigned line, const
 
         l = strv_split_quoted(rvalue);
         if (!l)
-                return -ENOMEM;
+                return log_oom();
 
         k = strv_length(l);
         if (k != 2) {
                 log_error("[%s:%u] Failed to parse bandwidth value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
                 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);
                 return 0;
         }
 
         if (parse_bytes(l[1], &bytes) < 0 || bytes <= 0) {
                 log_error("[%s:%u] Failed to parse block IO bandwidth value, ignoring: %s", filename, line, rvalue);
-                strv_free(l);
                 return 0;
         }
 
         r = asprintf(&t, "%s %llu", l[0], (unsigned long long) bytes);
-        strv_free(l);
-
         if (r < 0)
-                return -ENOMEM;
+                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);
-
+                                      t, blkio_map, NULL);
         if (r < 0) {
                 log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
                 return 0;
@@ -2010,6 +2145,13 @@ int config_parse_documentation(
         assert(rvalue);
         assert(u);
 
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                strv_free(u->documentation);
+                u->documentation = NULL;
+                return 0;
+        }
+
         r = config_parse_unit_strv_printf(filename, line, section, lvalue, ltype, rvalue, data, userdata);
         if (r < 0)
                 return r;
@@ -2029,10 +2171,12 @@ int config_parse_documentation(
 }
 
 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));
 }
 
@@ -2058,6 +2202,13 @@ int config_parse_syscall_filter(
         assert(rvalue);
         assert(u);
 
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                free(c->syscall_filter);
+                c->syscall_filter = NULL;
+                return 0;
+        }
+
         if (rvalue[0] == '~') {
                 invert = true;
                 rvalue++;
@@ -2069,7 +2220,7 @@ int config_parse_syscall_filter(
                 n = (syscall_max() + 31) >> 4;
                 c->syscall_filter = new(uint32_t, n);
                 if (!c->syscall_filter)
-                        return -ENOMEM;
+                        return log_oom();
 
                 memset(c->syscall_filter, invert ? 0xFF : 0, n * sizeof(uint32_t));
 
@@ -2085,17 +2236,16 @@ int config_parse_syscall_filter(
 
         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
                 int id;
-                char *t;
+                char _cleanup_free_ *t = NULL;
 
                 t = strndup(w, l);
                 if (!t)
-                        return -ENOMEM;
+                        return log_oom();
 
                 id = syscall_from_name(t);
-                free(t);
-
                 if (id < 0)  {
-                        log_error("[%s:%u] Failed to parse syscall, ignoring: %s", filename, line, rvalue);
+                        log_error("[%s:%u] Failed to parse syscall, ignoring: %s",
+                                  filename, line, t);
                         continue;
                 }
 
@@ -2520,7 +2670,7 @@ 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);