#include "dbus-unit.h"
#include "dbus-job.h"
#include "missing.h"
+#include "path-lookup.h"
/* As soon as 16 units are in our GC queue, make sure to run a gc sweep */
#define GC_QUEUE_ENTRIES_MAX 16
return 0;
}
-static char** session_dirs(void) {
- const char *home, *e;
- char *config_home = NULL, *data_home = NULL;
- char **config_dirs = NULL, **data_dirs = NULL;
- char **r = NULL, **t;
-
- /* Implement the mechanisms defined in
- *
- * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
- *
- * We look in both the config and the data dirs because we
- * want to encourage that distributors ship their unit files
- * as data, and allow overriding as configuration.
- */
-
- home = getenv("HOME");
-
- if ((e = getenv("XDG_CONFIG_HOME"))) {
- if (asprintf(&config_home, "%s/systemd/session", e) < 0)
- goto fail;
-
- } else if (home) {
- if (asprintf(&config_home, "%s/.config/systemd/session", home) < 0)
- goto fail;
- }
-
- if ((e = getenv("XDG_CONFIG_DIRS")))
- if (!(config_dirs = strv_split(e, ":")))
- goto fail;
-
- /* We don't treat /etc/xdg/systemd here as the spec
- * suggests because we assume that that is a link to
- * /etc/systemd/ anyway. */
-
- if ((e = getenv("XDG_DATA_HOME"))) {
- if (asprintf(&data_home, "%s/systemd/session", e) < 0)
- goto fail;
-
- } else if (home) {
- if (asprintf(&data_home, "%s/.local/share/systemd/session", home) < 0)
- goto fail;
-
- /* There is really no need for two unit dirs in $HOME,
- * except to be fully compliant with the XDG spec. We
- * now try to link the two dirs, so that we can
- * minimize disk seeks a little. Further down we'll
- * then filter out this link, if it is actually is
- * one. */
-
- mkdir_parents(data_home, 0777);
- symlink("../../../.config/systemd/session", data_home);
- }
-
- if ((e = getenv("XDG_DATA_DIRS")))
- data_dirs = strv_split(e, ":");
- else
- data_dirs = strv_new("/usr/local/share", "/usr/share", NULL);
-
- if (!data_dirs)
- goto fail;
-
- /* Now merge everything we found. */
- if (config_home) {
- if (!(t = strv_append(r, config_home)))
- goto fail;
- strv_free(r);
- r = t;
- }
-
- if (!(t = strv_merge_concat(r, config_dirs, "/systemd/session")))
- goto finish;
- strv_free(r);
- r = t;
-
- if (!(t = strv_append(r, SESSION_CONFIG_UNIT_PATH)))
- goto fail;
- strv_free(r);
- r = t;
-
- if (data_home) {
- if (!(t = strv_append(r, data_home)))
- goto fail;
- strv_free(r);
- r = t;
- }
-
- if (!(t = strv_merge_concat(r, data_dirs, "/systemd/session")))
- goto fail;
- strv_free(r);
- r = t;
-
- if (!(t = strv_append(r, SESSION_DATA_UNIT_PATH)))
- goto fail;
- strv_free(r);
- r = t;
-
- if (!strv_path_make_absolute_cwd(r))
- goto fail;
-
-finish:
- free(config_home);
- strv_free(config_dirs);
- free(data_home);
- strv_free(data_dirs);
-
- return r;
-
-fail:
- strv_free(r);
- r = NULL;
- goto finish;
-}
-
-static int manager_find_paths(Manager *m) {
- const char *e;
- char *t;
-
- assert(m);
-
- /* First priority is whatever has been passed to us via env
- * vars */
- if ((e = getenv("SYSTEMD_UNIT_PATH")))
- if (!(m->unit_path = split_path_and_make_absolute(e)))
- return -ENOMEM;
-
- if (strv_isempty(m->unit_path)) {
-
- /* Nothing is set, so let's figure something out. */
- strv_free(m->unit_path);
-
- if (m->running_as == MANAGER_SESSION) {
- if (!(m->unit_path = session_dirs()))
- return -ENOMEM;
- } else
- if (!(m->unit_path = strv_new(
- SYSTEM_CONFIG_UNIT_PATH, /* /etc/systemd/system/ */
- SYSTEM_DATA_UNIT_PATH, /* /lib/systemd/system/ */
- NULL)))
- return -ENOMEM;
- }
-
- if (m->running_as == MANAGER_INIT) {
- /* /etc/init.d/ compatibility does not matter to users */
-
- if ((e = getenv("SYSTEMD_SYSVINIT_PATH")))
- if (!(m->sysvinit_path = split_path_and_make_absolute(e)))
- return -ENOMEM;
-
- if (strv_isempty(m->sysvinit_path)) {
- strv_free(m->sysvinit_path);
-
- if (!(m->sysvinit_path = strv_new(
- SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */
- NULL)))
- return -ENOMEM;
- }
-
- if ((e = getenv("SYSTEMD_SYSVRCND_PATH")))
- if (!(m->sysvrcnd_path = split_path_and_make_absolute(e)))
- return -ENOMEM;
-
- if (strv_isempty(m->sysvrcnd_path)) {
- strv_free(m->sysvrcnd_path);
-
- if (!(m->sysvrcnd_path = strv_new(
- SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */
- NULL)))
- return -ENOMEM;
- }
- }
-
- if (m->unit_path)
- if (!strv_path_canonicalize(m->unit_path))
- return -ENOMEM;
-
- if (m->sysvinit_path)
- if (!strv_path_canonicalize(m->sysvinit_path))
- return -ENOMEM;
-
- if (m->sysvrcnd_path)
- if (!strv_path_canonicalize(m->sysvrcnd_path))
- return -ENOMEM;
-
- strv_uniq(m->unit_path);
- strv_uniq(m->sysvinit_path);
- strv_uniq(m->sysvrcnd_path);
-
- if (!strv_isempty(m->unit_path)) {
-
- if (!(t = strv_join(m->unit_path, "\n\t")))
- return -ENOMEM;
- log_debug("Looking for unit files in:\n\t%s", t);
- free(t);
- } else {
- log_debug("Ignoring unit files.");
- strv_free(m->unit_path);
- m->unit_path = NULL;
- }
-
- if (!strv_isempty(m->sysvinit_path)) {
-
- if (!(t = strv_join(m->sysvinit_path, "\n\t")))
- return -ENOMEM;
-
- log_debug("Looking for SysV init scripts in:\n\t%s", t);
- free(t);
- } else {
- log_debug("Ignoring SysV init scripts.");
- strv_free(m->sysvinit_path);
- m->sysvinit_path = NULL;
- }
-
- if (!strv_isempty(m->sysvrcnd_path)) {
-
- if (!(t = strv_join(m->sysvrcnd_path, "\n\t")))
- return -ENOMEM;
-
- log_debug("Looking for SysV rcN.d links in:\n\t%s", t);
- free(t);
- } else {
- log_debug("Ignoring SysV rcN.d links.");
- strv_free(m->sysvrcnd_path);
- m->sysvrcnd_path = NULL;
- }
-
- return 0;
-}
-
int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **_m) {
Manager *m;
int r = -ENOMEM;
if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
goto fail;
- if ((r = manager_find_paths(m)) < 0)
+ if ((r = lookup_paths_init(&m->lookup_paths, m->running_as)) < 0)
goto fail;
if ((r = manager_setup_signals(m)) < 0)
while ((u = hashmap_first(m->units)))
unit_free(u);
+
+ manager_dispatch_cleanup_queue(m);
+
+ assert(!m->load_queue);
+ assert(!m->run_queue);
+ assert(!m->dbus_unit_queue);
+ assert(!m->dbus_job_queue);
+ assert(!m->cleanup_queue);
+ assert(!m->gc_queue);
+
+ assert(hashmap_isempty(m->transaction_jobs));
+ assert(hashmap_isempty(m->jobs));
+ assert(hashmap_isempty(m->units));
}
void manager_free(Manager *m) {
assert(m);
- manager_dispatch_cleanup_queue(m);
manager_clear_jobs_and_units(m);
for (c = 0; c < _UNIT_TYPE_MAX; c++)
if (m->signal_watch.fd >= 0)
close_nointr_nofail(m->signal_watch.fd);
- strv_free(m->unit_path);
- strv_free(m->sysvinit_path);
- strv_free(m->sysvrcnd_path);
+ lookup_paths_free(&m->lookup_paths);
strv_free(m->environment);
free(m->cgroup_controller);
if (u->meta.id != k)
continue;
- if (UNIT_VTABLE(u)->coldplug)
- if ((q = UNIT_VTABLE(u)->coldplug(u)) < 0)
- r = q;
+ if ((q = unit_coldplug(u)) < 0)
+ r = q;
}
return r;
/* Does a recursive sweep through the ordering graph, looking
* for a cycle. If we find cycle we try to break it. */
- /* Did we find a cycle? */
- if (j->marker && j->generation == generation) {
+ /* Have we seen this before? */
+ if (j->generation == generation) {
Job *k;
- /* So, we already have been here. We have a
- * cycle. Let's try to break it. We go backwards in
- * our path and try to find a suitable job to
- * remove. We use the marker to find our way back,
- * since smart how we are we stored our way back in
- * there. */
+ /* If the marker is NULL we have been here already and
+ * decided the job was loop-free from here. Hence
+ * shortcut things and return right-away. */
+ if (!j->marker)
+ return 0;
+ /* So, the marker is not NULL and we already have been
+ * here. We have a cycle. Let's try to break it. We go
+ * backwards in our path and try to find a suitable
+ * job to remove. We use the marker to find our way
+ * back, since smart how we are we stored our way back
+ * in there. */
log_debug("Found ordering cycle on %s/%s", j->unit->meta.id, job_type_to_string(j->type));
- for (k = from; k; k = (k->generation == generation ? k->marker : NULL)) {
+ for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) {
log_debug("Walked on cycle path to %s/%s", k->unit->meta.id, job_type_to_string(k->type));
}
/* Make the marker point to where we come from, so that we can
- * find our way backwards if we want to break a cycle */
- j->marker = from;
+ * find our way backwards if we want to break a cycle. We use
+ * a special marker for the beginning: we point to
+ * ourselves. */
+ j->marker = from ? from : j;
j->generation = generation;
/* We assume that the the dependencies are bidirectional, and
Job *j;
int r;
Iterator i;
+ unsigned g;
assert(m);
assert(generation);
/* Check if the ordering graph is cyclic. If it is, try to fix
* that up by dropping one of the jobs. */
+ g = (*generation)++;
+
HASHMAP_FOREACH(j, m->transaction_jobs, i)
- if ((r = transaction_verify_order_one(m, j, NULL, (*generation)++)) < 0)
+ if ((r = transaction_verify_order_one(m, j, NULL, g)) < 0)
return r;
return 0;
return 0;
}
-static void manager_start_target(Manager *m, const char *name) {
+static int manager_start_target(Manager *m, const char *name) {
int r;
if ((r = manager_add_job_by_name(m, JOB_START, name, JOB_REPLACE, true, NULL)) < 0)
log_error("Failed to enqueue %s job: %s", name, strerror(-r));
+
+ return r;
}
static int manager_process_signal_fd(Manager *m) {
break;
case SIGTERM:
- if (m->running_as == MANAGER_INIT)
+ if (m->running_as == MANAGER_INIT) {
/* This is for compatibility with the
* original sysvinit */
m->exit_code = MANAGER_REEXECUTE;
- else
- m->exit_code = MANAGER_EXIT;
+ break;
+ }
- return 0;
+ /* Fall through */
case SIGINT:
if (m->running_as == MANAGER_INIT) {
break;
}
- m->exit_code = MANAGER_EXIT;
- return 0;
+ /* Run the exit target if there is one, if not, just exit. */
+ if (manager_start_target(m, SPECIAL_EXIT_SERVICE) < 0) {
+ m->exit_code = MANAGER_EXIT;
+ return 0;
+ }
+
+ break;
case SIGWINCH:
if (m->running_as == MANAGER_INIT)
break;
}
- case SIGUSR2:
- manager_dump_units(m, stdout, "\t");
- manager_dump_jobs(m, stdout, "\t");
+ case SIGUSR2: {
+ FILE *f;
+ char *dump = NULL;
+ size_t size;
+
+ if (!(f = open_memstream(&dump, &size))) {
+ log_warning("Failed to allocate memory stream.");
+ break;
+ }
+
+ manager_dump_units(m, f, "\t");
+ manager_dump_jobs(m, f, "\t");
+
+ if (ferror(f)) {
+ fclose(f);
+ free(dump);
+ log_warning("Failed to write status stream");
+ break;
+ }
+
+ fclose(f);
+ log_dump(LOG_INFO, dump);
+ free(dump);
+
break;
+ }
case SIGHUP:
m->exit_code = MANAGER_RELOAD;
/* From here on there is no way back. */
manager_clear_jobs_and_units(m);
+ /* Find new unit paths */
+ lookup_paths_free(&m->lookup_paths);
+ if ((q = lookup_paths_init(&m->lookup_paths, m->running_as)) < 0)
+ r = q;
+
/* First, enumerate what we can from all config files */
if ((q = manager_enumerate(m)) < 0)
r = q;
~ianmdlvl / elogind.git / blobdiff