X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Finstall.c;h=174d79bab6bc3eb72de371fe968465fb5968927c;hb=5ebff5337594d690b322078c512eb222d34aaa82;hp=2d6316aa8fbb17034b9091b3cc0b7b248acec93b;hpb=85e5760d4ffe99d578caf085ca0608b2bb2d4889;p=elogind.git
diff --git a/src/install.c b/src/install.c
index 2d6316aa8..174d79bab 100644
--- a/src/install.c
+++ b/src/install.c
@@ -1,9 +1,9 @@
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
- Copyright 2010 Lennart Poettering
+ Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
@@ -11,7 +11,7 @@
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
+ WITHOUT ANY WARRANTY; without even the implied warranty .
***/
-#include
-#include
-#include
#include
-#include
#include
-#include
+#include
+#include
+#include
-#include "log.h"
-#include "path-lookup.h"
#include "util.h"
-#include "macro.h"
+#include "hashmap.h"
+#include "set.h"
+#include "path-lookup.h"
#include "strv.h"
+#include "unit-name.h"
+#include "install.h"
#include "conf-parser.h"
-#include "dbus-common.h"
-#include "sd-daemon.h"
-
-static bool arg_force = false;
-static bool arg_all = false;
-static bool arg_verbose = false;
-
-static enum {
- WHERE_SYSTEM,
- WHERE_SESSION,
- WHERE_GLOBAL,
-} arg_where = WHERE_SYSTEM;
-
-static enum {
- ACTION_INVALID,
- ACTION_ENABLE,
- ACTION_DISABLE,
- ACTION_REALIZE,
- ACTION_TEST
-} arg_action = ACTION_INVALID;
-
-static enum {
- REALIZE_NO, /* Don't reload/start/stop or anything */
- REALIZE_RELOAD, /* Only reload daemon config, don't stop/start */
- REALIZE_MINIMAL, /* Only shutdown/restart if running. */
- REALIZE_MAYBE, /* Start if WantedBy= suggests */
- REALIZE_YES /* Start unconditionally */
-} arg_realize = REALIZE_NO;
typedef struct {
char *name;
@@ -70,615 +42,250 @@ typedef struct {
char **wanted_by;
} InstallInfo;
-static Hashmap *will_install = NULL, *have_installed = NULL;
-static Set *remove_symlinks_to = NULL;
-
-static int help(void) {
-
- printf("%s [OPTIONS...] {COMMAND} ...\n\n"
- "Install init system units.\n\n"
- " -h --help Show this help\n"
- " --force Override existing links\n"
- " --verbose Show what is being done as it is done\n"
- " --system Install into system\n"
- " --session Install into session\n"
- " --global Install into all sessions\n"
- " --all When disabling, remove all symlinks, not\n"
- " just those listed in the [Install] section\n"
- " --realize[=MODE] Start/stop/restart unit after installation\n"
- " Takes 'no', 'minimal', 'maybe' or 'yes'\n\n"
- "Commands:\n"
- " enable [NAME...] Enable one or more units\n"
- " disable [NAME...] Disable one or more units\n"
- " realize [NAME...] Test whether any of the specified units are enabled\n"
- " and the start/stop/restart units accordingly\n"
- " test [NAME...] Test whether any of the specified units are enabled\n",
- program_invocation_short_name);
-
- return 0;
-}
-
-static int parse_argv(int argc, char *argv[]) {
-
- enum {
- ARG_SESSION = 0x100,
- ARG_SYSTEM,
- ARG_GLOBAL,
- ARG_FORCE,
- ARG_REALIZE,
- ARG_ALL
- };
-
- static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "session", no_argument, NULL, ARG_SESSION },
- { "system", no_argument, NULL, ARG_SYSTEM },
- { "global", no_argument, NULL, ARG_GLOBAL },
- { "force", no_argument, NULL, ARG_FORCE },
- { "realize", optional_argument, NULL, ARG_REALIZE },
- { "all", no_argument, NULL, ARG_ALL },
- { "verbose", no_argument, NULL, 'v' },
- { NULL, 0, NULL, 0 }
- };
-
- int c;
- bool realize_switch = false;
-
- assert(argc >= 1);
- assert(argv);
-
- while ((c = getopt_long(argc, argv, "hv", options, NULL)) >= 0) {
-
- switch (c) {
-
- case 'h':
- help();
- return 0;
-
- case ARG_SESSION:
- arg_where = WHERE_SESSION;
- break;
-
- case ARG_SYSTEM:
- arg_where = WHERE_SYSTEM;
- break;
-
- case ARG_GLOBAL:
- arg_where = WHERE_GLOBAL;
- break;
-
- case ARG_FORCE:
- arg_force = true;
- break;
-
- case ARG_REALIZE:
-
- realize_switch = true;
-
- if (!optarg)
- arg_realize = REALIZE_MINIMAL;
- else if (streq(optarg, "no"))
- arg_realize = REALIZE_NO;
- else if (streq(optarg, "minimal"))
- arg_realize = REALIZE_MINIMAL;
- else if (streq(optarg, "maybe"))
- arg_realize = REALIZE_MAYBE;
- else if (streq(optarg, "yes"))
- arg_realize = REALIZE_YES;
- else if (streq(optarg, "reload"))
- arg_realize = REALIZE_RELOAD;
- else {
- log_error("Invalid --realize argument %s", optarg);
- return -EINVAL;
- }
-
- break;
-
- case ARG_ALL:
- arg_all = true;
- break;
-
- case 'v':
- arg_verbose = true;
- break;
-
- case '?':
- return -EINVAL;
-
- default:
- log_error("Unknown option code %c", c);
- return -EINVAL;
- }
- }
-
- if (optind >= argc) {
- help();
- return -EINVAL;
- }
-
- if (streq(argv[optind], "enable"))
- arg_action = ACTION_ENABLE;
- else if (streq(argv[optind], "disable"))
- arg_action = ACTION_DISABLE;
- else if (streq(argv[optind], "test"))
- arg_action = ACTION_TEST;
- else if (streq(argv[optind], "realize")) {
- arg_action = ACTION_REALIZE;
-
- if (!realize_switch)
- arg_realize = REALIZE_MINIMAL;
- } else {
- log_error("Unknown verb %s.", argv[optind]);
- return -EINVAL;
- }
-
- optind++;
+typedef struct {
+ Hashmap *will_install;
+ Hashmap *have_installed;
+} InstallContext;
- if (optind >= argc) {
- log_error("Missing unit name.");
- return -EINVAL;
- }
+static int lookup_paths_init_from_scope(LookupPaths *paths, UnitFileScope scope) {
+ assert(paths);
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+ zero(*paths);
- return 1;
+ return lookup_paths_init(paths,
+ scope == UNIT_FILE_SYSTEM ? MANAGER_SYSTEM : MANAGER_USER,
+ scope == UNIT_FILE_USER);
}
-static void install_info_free(InstallInfo *i) {
- assert(i);
-
- free(i->name);
- free(i->path);
- strv_free(i->aliases);
- strv_free(i->wanted_by);
- free(i);
-}
+static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) {
+ char *p = NULL;
+ int r;
-static void install_info_hashmap_free(Hashmap *m) {
- InstallInfo *i;
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+ assert(ret);
- while ((i = hashmap_steal_first(m)))
- install_info_free(i);
+ switch (scope) {
- hashmap_free(m);
-}
+ case UNIT_FILE_SYSTEM:
-static bool unit_name_valid(const char *name) {
+ if (root_dir && runtime)
+ asprintf(&p, "%s/run/systemd/system", root_dir);
+ else if (runtime)
+ p = strdup("/run/systemd/system");
+ else if (root_dir)
+ asprintf(&p, "%s/%s", root_dir, SYSTEM_CONFIG_UNIT_PATH);
+ else
+ p = strdup(SYSTEM_CONFIG_UNIT_PATH);
- /* This is a minimal version of unit_name_valid() from
- * unit-name.c */
+ break;
- if (!*name)
- return false;
+ case UNIT_FILE_GLOBAL:
- if (ignore_file(name))
- return false;
+ if (root_dir)
+ return -EINVAL;
- return true;
-}
+ if (runtime)
+ p = strdup("/run/systemd/user");
+ else
+ p = strdup(USER_CONFIG_UNIT_PATH);
+ break;
-static int install_info_add(const char *name) {
- InstallInfo *i;
- int r;
+ case UNIT_FILE_USER:
- if (!unit_name_valid(name))
- return -EINVAL;
+ if (root_dir || runtime)
+ return -EINVAL;
- if (hashmap_get(have_installed, name) ||
- hashmap_get(will_install, name))
- return 0;
+ r = user_config_home(&p);
+ if (r <= 0)
+ return r < 0 ? r : -ENOENT;
- if (!(i = new0(InstallInfo, 1))) {
- r = -ENOMEM;
- goto fail;
- }
+ break;
- if (!(i->name = strdup(name))) {
- r = -ENOMEM;
- goto fail;
+ default:
+ assert_not_reached("Bad scope");
}
- if ((r = hashmap_put(will_install, i->name, i)) < 0)
- goto fail;
+ if (!p)
+ return -ENOMEM;
+ *ret = p;
return 0;
-
-fail:
- if (i)
- install_info_free(i);
-
- return r;
}
-static int daemon_reload(DBusConnection *bus) {
- DBusMessage *m = NULL, *reply = NULL;
- DBusError error;
- int r;
+static int add_file_change(
+ UnitFileChange **changes,
+ unsigned *n_changes,
+ UnitFileChangeType type,
+ const char *path,
+ const char *source) {
- assert(bus);
+ UnitFileChange *c;
+ unsigned i;
- dbus_error_init(&error);
+ assert(path);
+ assert(!changes == !n_changes);
- if (arg_verbose)
- log_info("Reloading daemon configuration.");
+ if (!changes)
+ return 0;
- if (!(m = dbus_message_new_method_call(
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "Reload"))) {
- log_error("Could not allocate message.");
+ c = realloc(*changes, (*n_changes + 1) * sizeof(UnitFileChange));
+ if (!c)
return -ENOMEM;
- }
-
- if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
- log_error("Failed to reload configuration: %s", error.message);
- r = -EIO;
- goto finish;
- }
-
- r = 0;
-
-finish:
- if (m)
- dbus_message_unref(m);
-
- if (reply)
- dbus_message_unref(reply);
-
- dbus_error_free(&error);
-
- return r;
-}
-
-static int install_info_run(DBusConnection *bus, InstallInfo *i, bool enabled) {
- DBusMessage *m = NULL, *reply = NULL;
- DBusError error;
- int r;
- const char *mode = "replace";
-
- assert(bus);
- assert(i);
-
- dbus_error_init(&error);
-
- if (arg_action == ACTION_ENABLE ||
- (arg_action == ACTION_REALIZE && enabled)) {
-
- if (arg_realize == REALIZE_MAYBE) {
- char **k;
- bool yes_please = false;
-
- STRV_FOREACH(k, i->wanted_by) {
- DBusMessageIter sub, iter;
-
- const char *path, *state;
- const char *interface = "org.freedesktop.systemd1.Unit";
- const char *property = "ActiveState";
-
- if (!(m = dbus_message_new_method_call(
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "GetUnit"))) {
- log_error("Could not allocate message.");
- r = -ENOMEM;
- goto finish;
- }
-
- if (!dbus_message_append_args(m,
- DBUS_TYPE_STRING, k,
- DBUS_TYPE_INVALID)) {
- log_error("Could not append arguments to message.");
- r = -ENOMEM;
- goto finish;
- }
-
- if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
- /* Hmm, this unit doesn't exist, let's try the next one */
- dbus_message_unref(m);
- m = NULL;
- continue;
- }
-
- if (!dbus_message_get_args(reply, &error,
- DBUS_TYPE_OBJECT_PATH, &path,
- DBUS_TYPE_INVALID)) {
- log_error("Failed to parse reply: %s", error.message);
- r = -EIO;
- goto finish;
- }
-
- dbus_message_unref(m);
- if (!(m = dbus_message_new_method_call(
- "org.freedesktop.systemd1",
- path,
- "org.freedesktop.DBus.Properties",
- "Get"))) {
- log_error("Could not allocate message.");
- r = -ENOMEM;
- goto finish;
- }
- if (!dbus_message_append_args(m,
- DBUS_TYPE_STRING, &interface,
- DBUS_TYPE_STRING, &property,
- DBUS_TYPE_INVALID)) {
- log_error("Could not append arguments to message.");
- r = -ENOMEM;
- goto finish;
- }
-
- dbus_message_unref(reply);
- if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
- log_error("Failed to issue method call: %s", error.message);
- r = -EIO;
- goto finish;
- }
-
- if (!dbus_message_iter_init(reply, &iter) ||
- dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
- log_error("Failed to parse reply.");
- r = -EIO;
- goto finish;
- }
-
- dbus_message_iter_recurse(&iter, &sub);
-
- if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
- log_error("Failed to parse reply.");
- r = -EIO;
- goto finish;
- }
-
- dbus_message_iter_get_basic(&sub, &state);
-
- dbus_message_unref(m);
- dbus_message_unref(reply);
- m = reply = NULL;
-
- if (streq(state, "active") ||
- startswith(state, "reloading") ||
- startswith(state, "activating")) {
- yes_please = true;
- break;
- }
- }
-
- if (!yes_please) {
- r = 0;
- goto finish;
- }
- }
-
- if (arg_verbose)
- log_info("Restarting %s.", i->name);
-
- if (!(m = dbus_message_new_method_call(
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- arg_realize == REALIZE_MINIMAL ? "TryRestartUnit" : "RestartUnit"))) {
- log_error("Could not allocate message.");
- r = -ENOMEM;
- goto finish;
- }
-
- if (!dbus_message_append_args(m,
- DBUS_TYPE_STRING, &i->name,
- DBUS_TYPE_STRING, &mode,
- DBUS_TYPE_INVALID)) {
- log_error("Could not append arguments to message.");
- r = -ENOMEM;
- goto finish;
- }
+ *changes = c;
+ i = *n_changes;
+ c[i].type = type;
+ c[i].path = strdup(path);
+ if (!c[i].path)
+ return -ENOMEM;
- } else if (arg_action == ACTION_DISABLE ||
- (arg_action == ACTION_REALIZE && !enabled)) {
-
- if (arg_verbose)
- log_info("Stopping %s.", i->name);
-
- if (!(m = dbus_message_new_method_call(
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "StopUnit"))) {
- log_error("Could not allocate message.");
- r = -ENOMEM;
- goto finish;
- }
-
- if (!dbus_message_append_args(m,
- DBUS_TYPE_STRING, &i->name,
- DBUS_TYPE_STRING, &mode,
- DBUS_TYPE_INVALID)) {
- log_error("Could not append arguments to message.");
- r = -ENOMEM;
- goto finish;
+ if (source) {
+ c[i].source = strdup(source);
+ if (!c[i].source) {
+ free(c[i].path);
+ return -ENOMEM;
}
} else
- assert_not_reached("install_info_run() called but nothing to do?");
-
- if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
- log_error("Failed to realize unit: %s", error.message);
- r = -EIO;
- goto finish;
- }
-
- r = 0;
-
-finish:
- if (m)
- dbus_message_unref(m);
-
- if (reply)
- dbus_message_unref(reply);
-
- dbus_error_free(&error);
-
- return r;
-}
-
-static int config_parse_also(
- const char *filename,
- unsigned line,
- const char *section,
- const char *lvalue,
- const char *rvalue,
- void *data,
- void *userdata) {
-
- char *w;
- size_t l;
- char *state;
-
- assert(filename);
- assert(lvalue);
- assert(rvalue);
-
- FOREACH_WORD_QUOTED(w, l, rvalue, state) {
- char *n;
- int r;
-
- if (!(n = strndup(w, l)))
- return -ENOMEM;
-
- r = install_info_add(n);
- free(n);
-
- if (r < 0)
- return r;
- }
+ c[i].source = NULL;
+ *n_changes = i+1;
return 0;
}
-static int mark_symlink_for_removal(const char *p) {
+static int mark_symlink_for_removal(
+ Set **remove_symlinks_to,
+ const char *p) {
+
char *n;
int r;
assert(p);
- assert(path_is_absolute(p));
- if (!remove_symlinks_to)
- return 0;
+ r = set_ensure_allocated(remove_symlinks_to, string_hash_func, string_compare_func);
+ if (r < 0)
+ return r;
- if (!(n = canonicalize_file_name(p)))
- if (!(n = strdup(p)))
- return -ENOMEM;
+ n = strdup(p);
+ if (!n)
+ return -ENOMEM;
path_kill_slashes(n);
- if ((r = set_put(remove_symlinks_to, n)) < 0) {
+ r = set_put(*remove_symlinks_to, n);
+ if (r < 0) {
free(n);
- return r;
+ return r == -EEXIST ? 0 : r;
}
return 0;
}
-static int remove_marked_symlinks_fd(int fd, const char *config_path, const char *root, bool *deleted) {
+static int remove_marked_symlinks_fd(
+ Set *remove_symlinks_to,
+ int fd,
+ const char *path,
+ const char *config_path,
+ bool *deleted,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
int r = 0;
DIR *d;
- struct dirent *de;
+ struct dirent buffer, *de;
+ assert(remove_symlinks_to);
assert(fd >= 0);
- assert(root);
+ assert(path);
+ assert(config_path);
assert(deleted);
- if (!(d = fdopendir(fd)))
+ d = fdopendir(fd);
+ if (!d) {
+ close_nointr_nofail(fd);
return -errno;
+ }
rewinddir(d);
- while ((de = readdir(d))) {
- bool is_dir = false, is_link = false;
-
- if (ignore_file(de->d_name))
- continue;
+ for (;;) {
+ int k;
- if (de->d_type == DT_LNK)
- is_link = true;
- else if (de->d_type == DT_DIR)
- is_dir = true;
- else if (de->d_type == DT_UNKNOWN) {
- struct stat st;
-
- if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
- log_error("Failed to stat %s/%s: %m", root, de->d_name);
+ k = readdir_r(d, &buffer, &de);
+ if (k != 0) {
+ r = -errno;
+ break;
+ }
- if (r == 0)
- r = -errno;
- continue;
- }
+ if (!de)
+ break;
- is_link = S_ISLNK(st.st_mode);
- is_dir = S_ISDIR(st.st_mode);
- } else
+ if (ignore_file(de->d_name))
continue;
- if (is_dir) {
+ dirent_ensure_type(d, de);
+
+ if (de->d_type == DT_DIR) {
int nfd, q;
char *p;
- if ((nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0) {
- log_error("Failed to open %s/%s: %m", root, de->d_name);
+ nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
+ if (nfd < 0) {
+ if (errno == ENOENT)
+ continue;
if (r == 0)
r = -errno;
continue;
}
- if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
- log_error("Failed to allocate directory string.");
+ p = path_make_absolute(de->d_name, path);
+ if (!p) {
close_nointr_nofail(nfd);
r = -ENOMEM;
break;
}
- q = remove_marked_symlinks_fd(nfd, config_path, p, deleted);
+ /* This will close nfd, regardless whether it succeeds or not */
+ q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, deleted, changes, n_changes);
free(p);
- close_nointr_nofail(nfd);
if (r == 0)
- q = r;
+ r = q;
- } else if (is_link) {
- char *p, *dest, *c;
+ } else if (de->d_type == DT_LNK) {
+ char *p, *dest;
int q;
+ bool found;
- if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
- log_error("Failed to allocate symlink string.");
+ p = path_make_absolute(de->d_name, path);
+ if (!p) {
r = -ENOMEM;
break;
}
- if ((q = readlink_and_make_absolute(p, &dest)) < 0) {
- log_error("Cannot read symlink %s: %s", p, strerror(-q));
+ q = readlink_and_canonicalize(p, &dest);
+ if (q < 0) {
free(p);
+ if (q == -ENOENT)
+ continue;
+
if (r == 0)
r = q;
continue;
}
- if ((c = canonicalize_file_name(dest))) {
- /* This might fail if the destination
- * is already removed */
-
- free(dest);
- dest = c;
- }
-
- path_kill_slashes(dest);
- if (set_get(remove_symlinks_to, dest)) {
+ found =
+ set_get(remove_symlinks_to, dest) ||
+ set_get(remove_symlinks_to, file_name_from_path(dest));
- if (arg_verbose)
- log_info("rm '%s'", p);
+ if (found) {
- if (unlink(p) < 0) {
- log_error("Cannot unlink symlink %s: %m", p);
+ if (unlink(p) < 0 && errno != ENOENT) {
if (r == 0)
r = -errno;
@@ -686,9 +293,12 @@ static int remove_marked_symlinks_fd(int fd, const char *config_path, const char
rmdir_parents(p, config_path);
path_kill_slashes(p);
+ add_file_change(changes, n_changes, UNIT_FILE_UNLINK, p, NULL);
+
if (!set_get(remove_symlinks_to, p)) {
- if ((r = mark_symlink_for_removal(p)) < 0) {
+ q = mark_symlink_for_removal(&remove_symlinks_to, p);
+ if (q < 0) {
if (r == 0)
r = q;
} else
@@ -702,10 +312,17 @@ static int remove_marked_symlinks_fd(int fd, const char *config_path, const char
}
}
+ closedir(d);
+
return r;
}
-static int remove_marked_symlinks(const char *config_path) {
+static int remove_marked_symlinks(
+ Set *remove_symlinks_to,
+ const char *config_path,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
int fd, r = 0;
bool deleted;
@@ -714,17 +331,24 @@ static int remove_marked_symlinks(const char *config_path) {
if (set_size(remove_symlinks_to) <= 0)
return 0;
- if ((fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0)
+ fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
+ if (fd < 0)
return -errno;
do {
- int q;
+ int q, cfd;
deleted = false;
- if ((q = remove_marked_symlinks_fd(fd, config_path, config_path, &deleted)) < 0) {
- if (r == 0)
- r = q;
+ cfd = dup(fd);
+ if (cfd < 0) {
+ r = -errno;
+ break;
}
+
+ /* This takes possession of cfd and closes it */
+ q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &deleted, changes, n_changes);
+ if (r == 0)
+ r = q;
} while (deleted);
close_nointr_nofail(fd);
@@ -732,434 +356,1598 @@ static int remove_marked_symlinks(const char *config_path) {
return r;
}
-static int create_symlink(const char *old_path, const char *new_path) {
- int r;
+static int find_symlinks_fd(
+ const char *name,
+ int fd,
+ const char *path,
+ const char *config_path,
+ bool *same_name_link) {
- assert(old_path);
- assert(new_path);
+ int r = 0;
+ DIR *d;
+ struct dirent buffer, *de;
- if (arg_action == ACTION_ENABLE) {
- char *dest;
+ assert(name);
+ assert(fd >= 0);
+ assert(path);
+ assert(config_path);
+ assert(same_name_link);
- mkdir_parents(new_path, 0755);
+ d = fdopendir(fd);
+ if (!d) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
- if (symlink(old_path, new_path) >= 0)
- return 0;
+ for (;;) {
+ int k;
- if (errno != EEXIST) {
- log_error("Cannot link %s to %s: %m", old_path, new_path);
- return -errno;
+ k = readdir_r(d, &buffer, &de);
+ if (k != 0) {
+ r = -errno;
+ break;
}
- if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
+ if (!de)
+ break;
+
+ if (ignore_file(de->d_name))
+ continue;
+
+ dirent_ensure_type(d, de);
+
+ if (de->d_type == DT_DIR) {
+ int nfd, q;
+ char *p;
+
+ nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
+ if (nfd < 0) {
+ if (errno == ENOENT)
+ continue;
+
+ if (r == 0)
+ r = -errno;
+ continue;
+ }
+
+ p = path_make_absolute(de->d_name, path);
+ if (!p) {
+ close_nointr_nofail(nfd);
+ r = -ENOMEM;
+ break;
+ }
+
+ /* This will close nfd, regardless whether it succeeds or not */
+ q = find_symlinks_fd(name, nfd, p, config_path, same_name_link);
+ free(p);
- if (errno == EINVAL) {
- log_error("Cannot link %s to %s, file exists already and is not a symlink.", old_path, new_path);
- return -EEXIST;
+ if (q > 0) {
+ r = 1;
+ break;
}
- log_error("readlink() failed: %s", strerror(-r));
+ if (r == 0)
+ r = q;
+
+ } else if (de->d_type == DT_LNK) {
+ char *p, *dest;
+ bool found_path, found_dest, b = false;
+ int q;
+
+ /* Acquire symlink name */
+ p = path_make_absolute(de->d_name, path);
+ if (!p) {
+ r = -ENOMEM;
+ break;
+ }
+
+ /* Acquire symlink destination */
+ q = readlink_and_canonicalize(p, &dest);
+ if (q < 0) {
+ free(p);
+
+ if (q == -ENOENT)
+ continue;
+
+ if (r == 0)
+ r = q;
+ continue;
+ }
+
+ /* Check if the symlink itself matches what we
+ * are looking for */
+ if (path_is_absolute(name))
+ found_path = path_equal(p, name);
+ else
+ found_path = streq(de->d_name, name);
+
+ /* Check if what the symlink points to
+ * matches what we are looking for */
+ if (path_is_absolute(name))
+ found_dest = path_equal(dest, name);
+ else
+ found_dest = streq(file_name_from_path(dest), name);
+
+ free(dest);
+
+ if (found_path && found_dest) {
+ char *t;
+
+ /* Filter out same name links in the main
+ * config path */
+ t = path_make_absolute(name, config_path);
+ if (!t) {
+ free(p);
+ r = -ENOMEM;
+ break;
+ }
+
+ b = path_equal(t, p);
+ free(t);
+ }
+
+ free(p);
+
+ if (b)
+ *same_name_link = true;
+ else if (found_path || found_dest) {
+ r = 1;
+ break;
+ }
+ }
+ }
+
+ closedir(d);
+
+ return r;
+}
+
+static int find_symlinks(
+ const char *name,
+ const char *config_path,
+ bool *same_name_link) {
+
+ int fd;
+
+ assert(name);
+ assert(config_path);
+ assert(same_name_link);
+
+ fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
+ if (fd < 0)
+ return -errno;
+
+ /* This takes possession of fd and closes it */
+ return find_symlinks_fd(name, fd, config_path, config_path, same_name_link);
+}
+
+static int find_symlinks_in_scope(
+ UnitFileScope scope,
+ const char *root_dir,
+ const char *name,
+ UnitFileState *state) {
+
+ int r;
+ char *path;
+ bool same_name_link_runtime = false, same_name_link = false;
+
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+ assert(name);
+
+ if (scope == UNIT_FILE_SYSTEM || scope == UNIT_FILE_GLOBAL) {
+
+ /* First look in runtime config path */
+ r = get_config_path(scope, true, root_dir, &path);
+ if (r < 0)
+ return r;
+
+ r = find_symlinks(name, path, &same_name_link_runtime);
+ free(path);
+
+ if (r < 0)
+ return r;
+ else if (r > 0) {
+ *state = UNIT_FILE_ENABLED_RUNTIME;
return r;
}
+ }
- if (streq(dest, old_path)) {
- free(dest);
- return 0;
+ /* Then look in the normal config path */
+ r = get_config_path(scope, false, root_dir, &path);
+ if (r < 0)
+ return r;
+
+ r = find_symlinks(name, path, &same_name_link);
+ free(path);
+
+ if (r < 0)
+ return r;
+ else if (r > 0) {
+ *state = UNIT_FILE_ENABLED;
+ return r;
+ }
+
+ /* Hmm, we didn't find it, but maybe we found the same name
+ * link? */
+ if (same_name_link_runtime) {
+ *state = UNIT_FILE_LINKED_RUNTIME;
+ return 1;
+ } else if (same_name_link) {
+ *state = UNIT_FILE_LINKED;
+ return 1;
+ }
+
+ return 0;
+}
+
+int unit_file_mask(
+ UnitFileScope scope,
+ bool runtime,
+ const char *root_dir,
+ char *files[],
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ char **i, *prefix;
+ int r;
+
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+
+ r = get_config_path(scope, runtime, root_dir, &prefix);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(i, files) {
+ char *path;
+
+ if (!unit_name_is_valid_no_type(*i, true)) {
+ if (r == 0)
+ r = -EINVAL;
+ continue;
+ }
+
+ path = path_make_absolute(*i, prefix);
+ if (!path) {
+ r = -ENOMEM;
+ break;
+ }
+
+ if (symlink("/dev/null", path) >= 0) {
+ add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
+
+ free(path);
+ continue;
+ }
+
+ if (errno == EEXIST) {
+
+ if (null_or_empty_path(path) > 0) {
+ free(path);
+ continue;
+ }
+
+ if (force) {
+ unlink(path);
+
+ if (symlink("/dev/null", path) >= 0) {
+
+ add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
+ add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, "/dev/null");
+
+ free(path);
+ continue;
+ }
+ }
+
+ if (r == 0)
+ r = -EEXIST;
+ } else {
+ if (r == 0)
+ r = -errno;
+ }
+
+ free(path);
+ }
+
+ free(prefix);
+
+ return r;
+}
+
+int unit_file_unmask(
+ UnitFileScope scope,
+ bool runtime,
+ const char *root_dir,
+ char *files[],
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ char **i, *config_path = NULL;
+ int r, q;
+ Set *remove_symlinks_to = NULL;
+
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+
+ r = get_config_path(scope, runtime, root_dir, &config_path);
+ if (r < 0)
+ goto finish;
+
+ STRV_FOREACH(i, files) {
+ char *path;
+
+ if (!unit_name_is_valid_no_type(*i, true)) {
+ if (r == 0)
+ r = -EINVAL;
+ continue;
}
- if (!arg_force) {
- log_error("Cannot link %s to %s, symlink exists already and points to %s.", old_path, new_path, dest);
+ path = path_make_absolute(*i, config_path);
+ if (!path) {
+ r = -ENOMEM;
+ break;
+ }
+
+ q = null_or_empty_path(path);
+ if (q > 0) {
+ if (unlink(path) >= 0) {
+ mark_symlink_for_removal(&remove_symlinks_to, path);
+ add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
+
+ free(path);
+ continue;
+ }
+
+ q = -errno;
+ }
+
+ if (q != -ENOENT && r == 0)
+ r = q;
+
+ free(path);
+ }
+
+
+finish:
+ q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
+ if (r == 0)
+ r = q;
+
+ set_free_free(remove_symlinks_to);
+ free(config_path);
+
+ return r;
+}
+
+int unit_file_link(
+ UnitFileScope scope,
+ bool runtime,
+ const char *root_dir,
+ char *files[],
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ LookupPaths paths;
+ char **i, *config_path = NULL;
+ int r, q;
+
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+
+ zero(paths);
+
+ r = lookup_paths_init_from_scope(&paths, scope);
+ if (r < 0)
+ return r;
+
+ r = get_config_path(scope, runtime, root_dir, &config_path);
+ if (r < 0)
+ goto finish;
+
+ STRV_FOREACH(i, files) {
+ char *path, *fn;
+ struct stat st;
+
+ fn = file_name_from_path(*i);
+
+ if (!path_is_absolute(*i) ||
+ !unit_name_is_valid_no_type(fn, true)) {
+ if (r == 0)
+ r = -EINVAL;
+ continue;
+ }
+
+ if (lstat(*i, &st) < 0) {
+ if (r == 0)
+ r = -errno;
+ continue;
+ }
+
+ if (!S_ISREG(st.st_mode)) {
+ r = -ENOENT;
+ continue;
+ }
+
+ q = in_search_path(*i, paths.unit_path);
+ if (q < 0) {
+ r = q;
+ break;
+ }
+
+ if (q > 0)
+ continue;
+
+ path = path_make_absolute(fn, config_path);
+ if (!path) {
+ r = -ENOMEM;
+ break;
+ }
+
+ if (symlink(*i, path) >= 0) {
+ add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
+
+ free(path);
+ continue;
+ }
+
+ if (errno == EEXIST) {
+ char *dest = NULL;
+
+ q = readlink_and_make_absolute(path, &dest);
+
+ if (q < 0 && errno != ENOENT) {
+ free(path);
+
+ if (r == 0)
+ r = q;
+
+ continue;
+ }
+
+ if (q >= 0 && path_equal(dest, *i)) {
+ free(dest);
+ free(path);
+ continue;
+ }
+
free(dest);
- return -EEXIST;
+
+ if (force) {
+ unlink(path);
+
+ if (symlink(*i, path) >= 0) {
+
+ add_file_change(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
+ add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, path, *i);
+
+ free(path);
+ continue;
+ }
+ }
+
+ if (r == 0)
+ r = -EEXIST;
+ } else {
+ if (r == 0)
+ r = -errno;
+ }
+
+ free(path);
+ }
+
+ finish:
+ lookup_paths_free(&paths);
+ free(config_path);
+
+ return r;
+}
+
+void unit_file_list_free(Hashmap *h) {
+ UnitFileList *i;
+
+ while ((i = hashmap_steal_first(h))) {
+ free(i->path);
+ free(i);
+ }
+
+ hashmap_free(h);
+}
+
+void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes) {
+ unsigned i;
+
+ assert(changes || n_changes == 0);
+
+ if (!changes)
+ return;
+
+ for (i = 0; i < n_changes; i++) {
+ free(changes[i].path);
+ free(changes[i].source);
+ }
+
+ free(changes);
+}
+
+static void install_info_free(InstallInfo *i) {
+ assert(i);
+
+ free(i->name);
+ free(i->path);
+ strv_free(i->aliases);
+ strv_free(i->wanted_by);
+ free(i);
+}
+
+static void install_info_hashmap_free(Hashmap *m) {
+ InstallInfo *i;
+
+ if (!m)
+ return;
+
+ while ((i = hashmap_steal_first(m)))
+ install_info_free(i);
+
+ hashmap_free(m);
+}
+
+static void install_context_done(InstallContext *c) {
+ assert(c);
+
+ install_info_hashmap_free(c->will_install);
+ install_info_hashmap_free(c->have_installed);
+
+ c->will_install = c->have_installed = NULL;
+}
+
+static int install_info_add(
+ InstallContext *c,
+ const char *name,
+ const char *path) {
+ InstallInfo *i = NULL;
+ int r;
+
+ assert(c);
+ assert(name || path);
+
+ if (!name)
+ name = file_name_from_path(path);
+
+ if (!unit_name_is_valid_no_type(name, true))
+ return -EINVAL;
+
+ if (hashmap_get(c->have_installed, name) ||
+ hashmap_get(c->will_install, name))
+ return 0;
+
+ r = hashmap_ensure_allocated(&c->will_install, string_hash_func, string_compare_func);
+ if (r < 0)
+ return r;
+
+ i = new0(InstallInfo, 1);
+ if (!i)
+ return -ENOMEM;
+
+ i->name = strdup(name);
+ if (!i->name) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ if (path) {
+ i->path = strdup(path);
+ if (!i->path) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ r = hashmap_put(c->will_install, i->name, i);
+ if (r < 0)
+ goto fail;
+
+ return 0;
+
+fail:
+ if (i)
+ install_info_free(i);
+
+ return r;
+}
+
+static int install_info_add_auto(
+ InstallContext *c,
+ const char *name_or_path) {
+
+ assert(c);
+ assert(name_or_path);
+
+ if (path_is_absolute(name_or_path))
+ return install_info_add(c, NULL, name_or_path);
+ else
+ return install_info_add(c, name_or_path, NULL);
+}
+
+static int config_parse_also(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ char *w;
+ size_t l;
+ char *state;
+ InstallContext *c = data;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ FOREACH_WORD_QUOTED(w, l, rvalue, state) {
+ char *n;
+ int r;
+
+ n = strndup(w, l);
+ if (!n)
+ return -ENOMEM;
+
+ r = install_info_add(c, n, NULL);
+ if (r < 0) {
+ free(n);
+ return r;
+ }
+
+ free(n);
+ }
+
+ return 0;
+}
+
+static int unit_file_load(
+ InstallContext *c,
+ InstallInfo *info,
+ const char *path,
+ bool allow_symlink) {
+
+ const ConfigTableItem items[] = {
+ { "Install", "Alias", config_parse_strv, 0, &info->aliases },
+ { "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by },
+ { "Install", "Also", config_parse_also, 0, c },
+ { NULL, NULL, NULL, 0, NULL }
+ };
+
+ int fd;
+ FILE *f;
+ int r;
+
+ assert(c);
+ assert(info);
+ assert(path);
+
+ fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|(allow_symlink ? 0 : O_NOFOLLOW));
+ if (fd < 0)
+ return -errno;
+
+ f = fdopen(fd, "re");
+ if (!f) {
+ close_nointr_nofail(fd);
+ return -ENOMEM;
+ }
+
+ r = config_parse(path, f, NULL, config_item_table_lookup, (void*) items, true, info);
+ fclose(f);
+ if (r < 0)
+ return r;
+
+ return strv_length(info->aliases) + strv_length(info->wanted_by);
+}
+
+static int unit_file_search(
+ InstallContext *c,
+ InstallInfo *info,
+ LookupPaths *paths,
+ const char *root_dir,
+ bool allow_symlink) {
+
+ char **p;
+ int r;
+
+ assert(c);
+ assert(info);
+ assert(paths);
+
+ if (info->path)
+ return unit_file_load(c, info, info->path, allow_symlink);
+
+ assert(info->name);
+
+ STRV_FOREACH(p, paths->unit_path) {
+ char *path = NULL;
+
+ if (isempty(root_dir))
+ asprintf(&path, "%s/%s", *p, info->name);
+ else
+ asprintf(&path, "%s/%s/%s", root_dir, *p, info->name);
+
+ if (!path)
+ return -ENOMEM;
+
+ r = unit_file_load(c, info, path, allow_symlink);
+
+ if (r >= 0)
+ info->path = path;
+ else
+ free(path);
+
+ if (r != -ENOENT && r != -ELOOP)
+ return r;
+ }
+
+ return -ENOENT;
+}
+
+static int unit_file_can_install(
+ LookupPaths *paths,
+ const char *root_dir,
+ const char *name,
+ bool allow_symlink) {
+
+ InstallContext c;
+ InstallInfo *i;
+ int r;
+
+ assert(paths);
+ assert(name);
+
+ zero(c);
+
+ r = install_info_add_auto(&c, name);
+ if (r < 0)
+ return r;
+
+ assert_se(i = hashmap_first(c.will_install));
+
+ r = unit_file_search(&c, i, paths, root_dir, allow_symlink);
+
+ if (r >= 0)
+ r = strv_length(i->aliases) + strv_length(i->wanted_by);
+
+ install_context_done(&c);
+
+ return r;
+}
+
+static int create_symlink(
+ const char *old_path,
+ const char *new_path,
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ char *dest;
+ int r;
+
+ assert(old_path);
+ assert(new_path);
+
+ mkdir_parents(new_path, 0755);
+
+ if (symlink(old_path, new_path) >= 0) {
+ add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
+ return 0;
+ }
+
+ if (errno != EEXIST)
+ return -errno;
+
+ r = readlink_and_make_absolute(new_path, &dest);
+ if (r < 0)
+ return r;
+
+ if (path_equal(dest, old_path)) {
+ free(dest);
+ return 0;
+ }
+
+ free(dest);
+
+ if (force)
+ return -EEXIST;
+
+ unlink(new_path);
+
+ if (symlink(old_path, new_path) >= 0) {
+ add_file_change(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL);
+ add_file_change(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
+ return 0;
+ }
+
+ return -errno;
+}
+
+static int install_info_symlink_alias(
+ InstallInfo *i,
+ const char *config_path,
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ char **s;
+ int r = 0, q;
+
+ assert(i);
+ assert(config_path);
+
+ STRV_FOREACH(s, i->aliases) {
+ char *alias_path;
+
+ alias_path = path_make_absolute(*s, config_path);
+
+ if (!alias_path)
+ return -ENOMEM;
+
+ q = create_symlink(i->path, alias_path, force, changes, n_changes);
+ free(alias_path);
+
+ if (r == 0)
+ r = q;
+ }
+
+ return r;
+}
+
+static int install_info_symlink_wants(
+ InstallInfo *i,
+ const char *config_path,
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ char **s;
+ int r = 0, q;
+
+ assert(i);
+ assert(config_path);
+
+ STRV_FOREACH(s, i->wanted_by) {
+ char *path;
+
+ if (!unit_name_is_valid_no_type(*s, true)) {
+ r = -EINVAL;
+ continue;
}
- free(dest);
- unlink(new_path);
+ if (asprintf(&path, "%s/%s.wants/%s", config_path, *s, i->name) < 0)
+ return -ENOMEM;
+
+ q = create_symlink(i->path, path, force, changes, n_changes);
+ free(path);
+
+ if (r == 0)
+ r = q;
+ }
+
+ return r;
+}
+
+static int install_info_symlink_link(
+ InstallInfo *i,
+ LookupPaths *paths,
+ const char *config_path,
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ int r;
+ char *path;
+
+ assert(i);
+ assert(paths);
+ assert(config_path);
+ assert(i->path);
+
+ r = in_search_path(i->path, paths->unit_path);
+ if (r != 0)
+ return r;
+
+ if (asprintf(&path, "%s/%s", config_path, i->name) < 0)
+ return -ENOMEM;
+
+ r = create_symlink(i->path, path, force, changes, n_changes);
+ free(path);
+
+ return r;
+}
+
+static int install_info_apply(
+ InstallInfo *i,
+ LookupPaths *paths,
+ const char *config_path,
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ int r, q;
+
+ assert(i);
+ assert(paths);
+ assert(config_path);
+
+ r = install_info_symlink_alias(i, config_path, force, changes, n_changes);
+
+ q = install_info_symlink_wants(i, config_path, force, changes, n_changes);
+ if (r == 0)
+ r = q;
+
+ q = install_info_symlink_link(i, paths, config_path, force, changes, n_changes);
+ if (r == 0)
+ r = q;
+
+ return r;
+}
+
+static int install_context_apply(
+ InstallContext *c,
+ LookupPaths *paths,
+ const char *config_path,
+ const char *root_dir,
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ InstallInfo *i;
+ int r = 0, q;
+
+ assert(c);
+ assert(paths);
+ assert(config_path);
+
+ while ((i = hashmap_first(c->will_install))) {
+
+ q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
+ if (q < 0)
+ return q;
+
+ assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
+
+ q = unit_file_search(c, i, paths, root_dir, false);
+ if (q < 0) {
+ if (r >= 0)
+ r = q;
- if (arg_verbose)
- log_info("ln -s '%s' '%s'", old_path, new_path);
+ return r;
+ } else if (r >= 0)
+ r += q;
- if (symlink(old_path, new_path) >= 0)
- return 0;
+ q = install_info_apply(i, paths, config_path, force, changes, n_changes);
+ if (r >= 0 && q < 0)
+ r = q;
+ }
- log_error("Cannot link %s to %s: %m", old_path, new_path);
- return -errno;
+ return r;
+}
- } else if (arg_action == ACTION_DISABLE) {
- char *dest;
+static int install_context_mark_for_removal(
+ InstallContext *c,
+ LookupPaths *paths,
+ Set **remove_symlinks_to,
+ const char *config_path,
+ const char *root_dir) {
- if ((r = mark_symlink_for_removal(old_path)) < 0)
- return r;
+ InstallInfo *i;
+ int r = 0, q;
- if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
- if (errno == ENOENT)
- return 0;
+ assert(c);
+ assert(paths);
+ assert(config_path);
- if (errno == EINVAL) {
- log_warning("File %s not a symlink, ignoring.", old_path);
- return 0;
- }
+ /* Marks all items for removal */
- log_error("readlink() failed: %s", strerror(-r));
- return r;
- }
+ while ((i = hashmap_first(c->will_install))) {
- if (!streq(dest, old_path)) {
- log_warning("File %s not a symlink to %s but points to %s, ignoring.", new_path, old_path, dest);
- free(dest);
- return 0;
- }
+ q = hashmap_ensure_allocated(&c->have_installed, string_hash_func, string_compare_func);
+ if (q < 0)
+ return q;
+ assert_se(hashmap_move_one(c->have_installed, c->will_install, i->name) == 0);
- free(dest);
+ q = unit_file_search(c, i, paths, root_dir, false);
+ if (q < 0) {
+ if (r >= 0)
+ r = q;
- if ((r = mark_symlink_for_removal(new_path)) < 0)
return r;
+ } else if (r >= 0)
+ r += q;
- if (arg_verbose)
- log_info("rm '%s'", new_path);
+ q = mark_symlink_for_removal(remove_symlinks_to, i->name);
+ if (r >= 0 && q < 0)
+ r = q;
+ }
- if (unlink(new_path) >= 0)
- return 0;
+ return r;
+}
- log_error("Cannot unlink %s: %m", new_path);
- return -errno;
+int unit_file_enable(
+ UnitFileScope scope,
+ bool runtime,
+ const char *root_dir,
+ char *files[],
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
- } else if (arg_action == ACTION_TEST || arg_action == ACTION_REALIZE) {
- char *dest;
+ LookupPaths paths;
+ InstallContext c;
+ char **i, *config_path = NULL;
+ int r;
- if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
- if (errno == ENOENT || errno == EINVAL)
- return 0;
+ zero(paths);
+ zero(c);
- log_error("readlink() failed: %s", strerror(-r));
- return r;
- }
+ r = lookup_paths_init_from_scope(&paths, scope);
+ if (r < 0)
+ return r;
- if (streq(dest, old_path)) {
- free(dest);
- return 1;
- }
+ r = get_config_path(scope, runtime, root_dir, &config_path);
+ if (r < 0)
+ goto finish;
- return 0;
+ STRV_FOREACH(i, files) {
+ r = install_info_add_auto(&c, *i);
+ if (r < 0)
+ goto finish;
}
- assert_not_reached("Unknown action.");
+ /* This will return the number of symlink rules that were
+ supposed to be created, not the ones actually created. This is
+ useful to determine whether the passed files hat any
+ installation data at all. */
+ r = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes);
+
+finish:
+ install_context_done(&c);
+ lookup_paths_free(&paths);
+ free(config_path);
+
+ return r;
}
-static int install_info_symlink_alias(InstallInfo *i, const char *config_path) {
- char **s;
- char *alias_path = NULL;
- int r;
+int unit_file_disable(
+ UnitFileScope scope,
+ bool runtime,
+ const char *root_dir,
+ char *files[],
+ UnitFileChange **changes,
+ unsigned *n_changes) {
- assert(i);
+ LookupPaths paths;
+ InstallContext c;
+ char **i, *config_path = NULL;
+ Set *remove_symlinks_to = NULL;
+ int r, q;
- STRV_FOREACH(s, i->aliases) {
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
- if (!unit_name_valid(*s)) {
- log_error("Invalid name %s.", *s);
- r = -EINVAL;
- goto finish;
- }
+ zero(paths);
+ zero(c);
- free(alias_path);
- if (!(alias_path = path_make_absolute(*s, config_path))) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ r = lookup_paths_init_from_scope(&paths, scope);
+ if (r < 0)
+ return r;
- if ((r = create_symlink(i->path, alias_path)) != 0)
- goto finish;
+ r = get_config_path(scope, runtime, root_dir, &config_path);
+ if (r < 0)
+ goto finish;
- if (arg_action == ACTION_DISABLE)
- rmdir_parents(alias_path, config_path);
+ STRV_FOREACH(i, files) {
+ r = install_info_add_auto(&c, *i);
+ if (r < 0)
+ goto finish;
}
- r = 0;
+ r = install_context_mark_for_removal(&c, &paths, &remove_symlinks_to, config_path, root_dir);
+
+ q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
+ if (r == 0)
+ r = q;
finish:
- free(alias_path);
+ install_context_done(&c);
+ lookup_paths_free(&paths);
+ set_free_free(remove_symlinks_to);
+ free(config_path);
return r;
}
-static int install_info_symlink_wants(InstallInfo *i, const char *config_path) {
- char **s;
- char *alias_path = NULL;
- int r;
+int unit_file_reenable(
+ UnitFileScope scope,
+ bool runtime,
+ const char *root_dir,
+ char *files[],
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
- assert(i);
+ LookupPaths paths;
+ InstallContext c;
+ char **i, *config_path = NULL;
+ Set *remove_symlinks_to = NULL;
+ int r, q;
- STRV_FOREACH(s, i->wanted_by) {
- if (!unit_name_valid(*s)) {
- log_error("Invalid name %s.", *s);
- r = -EINVAL;
- goto finish;
- }
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
- free(alias_path);
- alias_path = NULL;
+ zero(paths);
+ zero(c);
- if (asprintf(&alias_path, "%s/%s.wants/%s", config_path, *s, i->name) < 0) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ r = lookup_paths_init_from_scope(&paths, scope);
+ if (r < 0)
+ return r;
+
+ r = get_config_path(scope, runtime, root_dir, &config_path);
+ if (r < 0)
+ goto finish;
- if ((r = create_symlink(i->path, alias_path)) != 0)
+ STRV_FOREACH(i, files) {
+ r = mark_symlink_for_removal(&remove_symlinks_to, *i);
+ if (r < 0)
goto finish;
- if (arg_action == ACTION_DISABLE)
- rmdir_parents(alias_path, config_path);
+ r = install_info_add_auto(&c, *i);
+ if (r < 0)
+ goto finish;
}
- r = 0;
+ r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
+
+ /* Returns number of symlinks that where supposed to be installed. */
+ q = install_context_apply(&c, &paths, config_path, root_dir, force, changes, n_changes);
+ if (r == 0)
+ r = q;
finish:
- free(alias_path);
+ lookup_paths_free(&paths);
+ install_context_done(&c);
+ set_free_free(remove_symlinks_to);
+ free(config_path);
return r;
}
-static int install_info_apply(LookupPaths *paths, InstallInfo *i, const char *config_path) {
+UnitFileState unit_file_get_state(
+ UnitFileScope scope,
+ const char *root_dir,
+ const char *name) {
- const ConfigItem items[] = {
- { "Alias", config_parse_strv, &i->aliases, "Install" },
- { "WantedBy", config_parse_strv, &i->wanted_by, "Install" },
- { "Also", config_parse_also, NULL, "Install" },
+ LookupPaths paths;
+ UnitFileState state = _UNIT_FILE_STATE_INVALID;
+ char **i, *path = NULL;
+ int r;
- { NULL, NULL, NULL, NULL }
- };
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+ assert(name);
- char **p;
- char *filename = NULL;
- FILE *f = NULL;
- int r;
+ zero(paths);
- assert(paths);
- assert(i);
+ if (root_dir && scope != UNIT_FILE_SYSTEM)
+ return -EINVAL;
- STRV_FOREACH(p, paths->unit_path) {
- int fd;
+ if (!unit_name_is_valid_no_type(name, true))
+ return -EINVAL;
- if (!(filename = path_make_absolute(i->name, *p))) {
- log_error("Out of memory");
- return -ENOMEM;
+ r = lookup_paths_init_from_scope(&paths, scope);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(i, paths.unit_path) {
+ struct stat st;
+
+ free(path);
+ path = NULL;
+
+ if (root_dir)
+ asprintf(&path, "%s/%s/%s", root_dir, *i, name);
+ else
+ asprintf(&path, "%s/%s", *i, name);
+
+ if (!path) {
+ r = -ENOMEM;
+ goto finish;
}
- /* Ensure that we don't follow symlinks */
- if ((fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NOCTTY)) >= 0)
- if ((f = fdopen(fd, "re")))
- break;
+ if (lstat(path, &st) < 0) {
+ r = -errno;
+ if (errno == ENOENT)
+ continue;
- if (errno == ELOOP) {
- log_error("Refusing to operate on symlinks, please pass unit names or absolute paths to unit files.");
- free(filename);
- return -errno;
+ goto finish;
}
- if (errno != ENOENT) {
- log_error("Failed to open %s: %m", filename);
- free(filename);
- return -errno;
+ if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode)) {
+ r = -ENOENT;
+ goto finish;
}
- free(filename);
- filename = NULL;
- }
+ r = null_or_empty_path(path);
+ if (r < 0 && r != -ENOENT)
+ goto finish;
+ else if (r > 0) {
+ state = path_startswith(*i, "/run") ?
+ UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
+ r = 0;
+ goto finish;
+ }
- if (!f) {
- log_error("Couldn't find %s.", i->name);
- return -ENOENT;
+ r = find_symlinks_in_scope(scope, root_dir, name, &state);
+ if (r < 0) {
+ goto finish;
+ } else if (r > 0) {
+ r = 0;
+ goto finish;
+ }
+
+ r = unit_file_can_install(&paths, root_dir, path, true);
+ if (r < 0 && errno != -ENOENT)
+ goto finish;
+ else if (r > 0) {
+ state = UNIT_FILE_DISABLED;
+ r = 0;
+ goto finish;
+ } else if (r == 0) {
+ state = UNIT_FILE_STATIC;
+ r = 0;
+ goto finish;
+ }
}
- i->path = filename;
+finish:
+ lookup_paths_free(&paths);
+ free(path);
- if ((r = config_parse(filename, f, NULL, items, true, i)) < 0) {
- fclose(f);
- return r;
- }
+ return r < 0 ? r : state;
+}
- fclose(f);
+int unit_file_query_preset(UnitFileScope scope, const char *name) {
+ char **files, **i;
+ int r;
- if ((r = install_info_symlink_alias(i, config_path)) != 0)
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+ assert(name);
+
+ if (scope == UNIT_FILE_SYSTEM)
+ r = conf_files_list(&files, ".preset",
+ "/etc/systemd/system.preset",
+ "/usr/local/lib/systemd/system.preset",
+ "/usr/lib/systemd/system.preset",
+ "/lib/systemd/system.preset",
+ NULL);
+ else if (scope == UNIT_FILE_GLOBAL)
+ r = conf_files_list(&files, ".preset",
+ "/etc/systemd/user.preset",
+ "/usr/local/lib/systemd/user.preset",
+ "/usr/lib/systemd/user.preset",
+ NULL);
+ else
+ return 1;
+
+ if (r < 0)
return r;
- if ((r = install_info_symlink_wants(i, config_path)) != 0)
- return r;
+ STRV_FOREACH(i, files) {
+ FILE *f;
- if ((r = mark_symlink_for_removal(filename)) < 0)
- return r;
+ f = fopen(*i, "re");
+ if (!f) {
+ if (errno == ENOENT)
+ continue;
- if ((r = remove_marked_symlinks(config_path)) < 0)
- return r;
+ r = -errno;
+ goto finish;
+ }
- return 0;
-}
+ for (;;) {
+ char line[LINE_MAX], *l;
-static char *get_config_path(void) {
+ if (!fgets(line, sizeof(line), f))
+ break;
- switch (arg_where) {
+ l = strstrip(line);
+ if (!*l)
+ continue;
- case WHERE_SYSTEM:
- return strdup(SYSTEM_CONFIG_UNIT_PATH);
+ if (strchr(COMMENTS, *l))
+ continue;
- case WHERE_GLOBAL:
- return strdup(SESSION_CONFIG_UNIT_PATH);
+ if (first_word(l, "enable")) {
+ l += 6;
+ l += strspn(l, WHITESPACE);
- case WHERE_SESSION: {
- char *p;
+ if (fnmatch(l, name, FNM_NOESCAPE) == 0) {
+ r = 1;
+ fclose(f);
+ goto finish;
+ }
+ } else if (first_word(l, "disable")) {
+ l += 7;
+ l += strspn(l, WHITESPACE);
- if (session_config_home(&p) < 0)
- return NULL;
+ if (fnmatch(l, name, FNM_NOESCAPE) == 0) {
+ r = 0;
+ fclose(f);
+ goto finish;
+ }
+ } else
+ log_debug("Couldn't parse line '%s'", l);
+ }
- return p;
+ fclose(f);
}
- default:
- assert_not_reached("Unknown config path.");
- }
-}
+ /* Default is "enable" */
+ r = 1;
-static int do_realize(bool enabled) {
- DBusConnection *bus = NULL;
- DBusError error;
- int r, q;
- Iterator i;
- InstallInfo *j;
+finish:
+ strv_free(files);
- dbus_error_init(&error);
+ return r;
+}
- if (arg_realize == REALIZE_NO)
- return 0;
+int unit_file_preset(
+ UnitFileScope scope,
+ bool runtime,
+ const char *root_dir,
+ char *files[],
+ bool force,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
- if (arg_where == WHERE_GLOBAL) {
- log_warning("Warning: --realize has no effect with --global.");
- return 0;
- }
+ LookupPaths paths;
+ InstallContext plus, minus;
+ char **i, *config_path = NULL;
+ Set *remove_symlinks_to = NULL;
+ int r, q;
- if (arg_action == ACTION_TEST) {
- log_warning("Warning: --realize has no effect with test.");
- return 0;
- }
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
- if (arg_where == WHERE_SYSTEM && sd_booted() <= 0) {
- log_info("systemd is not running, --realize has no effect.");
- return 0;
- }
+ zero(paths);
+ zero(plus);
+ zero(minus);
- if (arg_where == WHERE_SYSTEM && running_in_chroot() > 0) {
- log_info("Running in a chroot() environment, --realize has no effect.");
- return 0;
- }
+ r = lookup_paths_init_from_scope(&paths, scope);
+ if (r < 0)
+ return r;
- if ((r = bus_connect(arg_where == WHERE_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &bus, NULL, &error)) < 0) {
- log_error("Failed to get D-Bus connection: %s", error.message);
+ r = get_config_path(scope, runtime, root_dir, &config_path);
+ if (r < 0)
goto finish;
- }
- r = 0;
+ STRV_FOREACH(i, files) {
+
+ if (!unit_name_is_valid_no_type(*i, true)) {
+ r = -EINVAL;
+ goto finish;
+ }
- if (arg_action == ACTION_ENABLE || arg_action == ACTION_REALIZE)
- if ((r = daemon_reload(bus)) < 0)
+ r = unit_file_query_preset(scope, *i);
+ if (r < 0)
goto finish;
- if (arg_realize != REALIZE_RELOAD) {
- HASHMAP_FOREACH(j, have_installed, i)
- if ((q = install_info_run(bus, j, enabled)) < 0)
- r = q;
+ if (r)
+ r = install_info_add_auto(&plus, *i);
+ else
+ r = install_info_add_auto(&minus, *i);
+
+ if (r < 0)
+ goto finish;
}
- if (arg_action == ACTION_DISABLE)
- if ((q = daemon_reload(bus)) < 0)
- r = q;
+ r = install_context_mark_for_removal(&minus, &paths, &remove_symlinks_to, config_path, root_dir);
-finish:
- if (bus) {
- dbus_connection_close(bus);
- dbus_connection_unref(bus);
- }
+ q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
+ if (r == 0)
+ r = q;
- dbus_error_free(&error);
+ /* Returns number of symlinks that where supposed to be installed. */
+ q = install_context_apply(&plus, &paths, config_path, root_dir, force, changes, n_changes);
+ if (r == 0)
+ r = q;
+
+finish:
+ lookup_paths_free(&paths);
+ install_context_done(&plus);
+ install_context_done(&minus);
+ set_free_free(remove_symlinks_to);
+ free(config_path);
- dbus_shutdown();
return r;
}
-int main(int argc, char *argv[]) {
- int r, retval = 1, j;
+int unit_file_get_list(
+ UnitFileScope scope,
+ const char *root_dir,
+ Hashmap *h) {
+
LookupPaths paths;
- InstallInfo *i;
- char *config_path = NULL;
+ char **i, *buf = NULL;
+ DIR *d = NULL;
+ int r;
+
+ assert(scope >= 0);
+ assert(scope < _UNIT_FILE_SCOPE_MAX);
+ assert(h);
zero(paths);
- log_parse_environment();
+ if (root_dir && scope != UNIT_FILE_SYSTEM)
+ return -EINVAL;
- if ((r = parse_argv(argc, argv)) < 0)
- goto finish;
- else if (r == 0) {
- retval = 0;
- goto finish;
- }
+ r = lookup_paths_init_from_scope(&paths, scope);
+ if (r < 0)
+ return r;
- if ((r = lookup_paths_init(&paths, arg_where == WHERE_SYSTEM ? MANAGER_SYSTEM : MANAGER_SESSION)) < 0) {
- log_error("Failed to determine lookup paths: %s", strerror(-r));
- goto finish;
- }
+ STRV_FOREACH(i, paths.unit_path) {
+ struct dirent buffer, *de;
+ const char *units_dir;
- if (!(config_path = get_config_path())) {
- log_error("Failed to determine config path");
- goto finish;
- }
+ free(buf);
+ buf = NULL;
+
+ if (root_dir) {
+ if (asprintf(&buf, "%s/%s", root_dir, *i) < 0) {
+ r = -ENOMEM;
+ goto finish;
+ }
+ units_dir = buf;
+ } else
+ units_dir = *i;
- will_install = hashmap_new(string_hash_func, string_compare_func);
- have_installed = hashmap_new(string_hash_func, string_compare_func);
+ if (d)
+ closedir(d);
- if (!will_install || !have_installed) {
- log_error("Failed to allocate unit sets.");
- goto finish;
- }
+ d = opendir(units_dir);
+ if (!d) {
+ if (errno == ENOENT)
+ continue;
- if (arg_all)
- if (!(remove_symlinks_to = set_new(string_hash_func, string_compare_func))) {
- log_error("Failed to allocate symlink sets.");
+ r = -errno;
goto finish;
}
- for (j = optind; j < argc; j++)
- if ((r = install_info_add(argv[j])) < 0)
- goto finish;
+ for (;;) {
+ UnitFileList *f;
+
+ r = readdir_r(d, &buffer, &de);
+ if (r != 0) {
+ r = -r;
+ goto finish;
+ }
+
+ if (!de)
+ break;
+
+ if (ignore_file(de->d_name))
+ continue;
+
+ if (!unit_name_is_valid_no_type(de->d_name, true))
+ continue;
+
+ if (hashmap_get(h, de->d_name))
+ continue;
+ r = dirent_ensure_type(d, de);
+ if (r < 0) {
+ if (errno == ENOENT)
+ continue;
- while ((i = hashmap_first(will_install))) {
- assert_se(hashmap_move_one(have_installed, will_install, i->name) == 0);
+ goto finish;
+ }
- if ((r = install_info_apply(&paths, i, config_path)) != 0) {
+ if (de->d_type != DT_LNK && de->d_type != DT_REG)
+ continue;
- if (r < 0)
+ f = new0(UnitFileList, 1);
+ if (!f) {
+ r = -ENOMEM;
goto finish;
+ }
- /* In test mode and found something */
- retval = 0;
- break;
- }
- }
+ f->path = path_make_absolute(de->d_name, units_dir);
+ if (!f->path) {
+ free(f);
+ r = -ENOMEM;
+ goto finish;
+ }
- if (do_realize(!retval) < 0)
- goto finish;
+ r = null_or_empty_path(f->path);
+ if (r < 0 && r != -ENOENT) {
+ free(f->path);
+ free(f);
+ goto finish;
+ } else if (r > 0) {
+ f->state =
+ path_startswith(*i, "/run") ?
+ UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
+ goto found;
+ }
-finish:
- install_info_hashmap_free(will_install);
- install_info_hashmap_free(have_installed);
+ r = find_symlinks_in_scope(scope, root_dir, de->d_name, &f->state);
+ if (r < 0) {
+ free(f->path);
+ free(f);
+ goto finish;
+ } else if (r > 0)
+ goto found;
- set_free_free(remove_symlinks_to);
+ r = unit_file_can_install(&paths, root_dir, f->path, true);
+ if (r < 0) {
+ free(f->path);
+ free(f);
+ goto finish;
+ } else if (r > 0) {
+ f->state = UNIT_FILE_DISABLED;
+ goto found;
+ } else {
+ f->state = UNIT_FILE_STATIC;
+ goto found;
+ }
+
+ free(f->path);
+ free(f);
+ continue;
+
+ found:
+ r = hashmap_put(h, file_name_from_path(f->path), f);
+ if (r < 0) {
+ free(f->path);
+ free(f);
+ goto finish;
+ }
+ }
+ }
+finish:
lookup_paths_free(&paths);
+ free(buf);
- free(config_path);
+ if (d)
+ closedir(d);
- return retval;
+ return r;
}
+
+static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = {
+ [UNIT_FILE_ENABLED] = "enabled",
+ [UNIT_FILE_ENABLED_RUNTIME] = "enabled-runtie",
+ [UNIT_FILE_LINKED] = "linked",
+ [UNIT_FILE_LINKED_RUNTIME] = "linked-runtime",
+ [UNIT_FILE_MASKED] = "masked",
+ [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime",
+ [UNIT_FILE_STATIC] = "static",
+ [UNIT_FILE_DISABLED] = "disabled"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState);
+
+static const char* const unit_file_change_type_table[_UNIT_FILE_CHANGE_TYPE_MAX] = {
+ [UNIT_FILE_SYMLINK] = "symlink",
+ [UNIT_FILE_UNLINK] = "unlink",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(unit_file_change_type, UnitFileChangeType);