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config: implement search path logic

This commit is contained in:
Lennart Poettering 2010-02-13 01:07:02 +01:00
parent 65d2ebdc34
commit 036643a247
8 changed files with 281 additions and 64 deletions
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8
Makefile.am
View File

@ -17,9 +17,15 @@
ACLOCAL_AMFLAGS = -I m4
pkgsysconfdir=$(sysconfdir)/systemd
AM_CPPFLAGS = \
-include $(top_builddir)/config.h \
-DUNIT_PATH=\"/tmp/does/not/exist\"
-DSYSTEM_CONFIG_UNIT_PATH=\"$(pkgsysconfdir)/system\" \
-DSYSTEM_DATA_UNIT_PATH=\"$(pkgdatadir)/system\" \
-DSYSTEM_SYSVINIT_PATH=\"$(sysconfdir)/init.d\" \
-DSESSION_CONFIG_UNIT_PATH=\"$(pkgsysconfdir)/session\" \
-DSESSION_DATA_UNIT_PATH=\"$(pkgdatadir)/session\"
sbin_PROGRAMS = \
systemd

2
dbus.c
View File

@ -378,7 +378,7 @@ int bus_init(Manager *m) {
dbus_connection_set_change_sigpipe(FALSE);
dbus_error_init(&error);
if (!(m->bus = dbus_bus_get_private(m->running_as == MANAGER_USER ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
if (!(m->bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
log_error("Failed to get D-Bus connection: %s", error.message);
dbus_error_free(&error);
return -ECONNREFUSED;

77
load-dropin.c
View File

@ -25,6 +25,7 @@
#include "unit.h"
#include "load-dropin.h"
#include "log.h"
#include "strv.h"
int unit_load_dropin(Unit *u) {
Iterator i;
@ -39,52 +40,56 @@ int unit_load_dropin(Unit *u) {
char *path;
DIR *d;
struct dirent *de;
char **p;
if (asprintf(&path, "%s/%s.wants", unit_path(), t) < 0)
return -ENOMEM;
STRV_FOREACH(p, u->meta.manager->unit_path) {
if (!(d = opendir(path))) {
r = -errno;
free(path);
if (r == -ENOENT)
continue;
return r;
}
free(path);
while ((de = readdir(d))) {
if (de->d_name[0] == '.')
continue;
assert(de->d_name[0]);
if (de->d_name[strlen(de->d_name)-1] == '~')
continue;
if (asprintf(&path, "%s/%s.wants/%s", unit_path(), t, de->d_name) < 0) {
closedir(d);
if (asprintf(&path, "%s/%s.wants", *p, t) < 0)
return -ENOMEM;
}
if (!unit_name_is_valid(de->d_name)) {
log_info("Name of %s is not a valid unit name. Ignoring.", path);
if (!(d = opendir(path))) {
r = -errno;
free(path);
continue;
}
r = unit_add_dependency_by_name(u, UNIT_WANTS, path);
free(path);
if (r == -ENOENT)
continue;
if (r < 0) {
closedir(d);
return r;
}
}
closedir(d);
free(path);
while ((de = readdir(d))) {
if (de->d_name[0] == '.')
continue;
assert(de->d_name[0]);
if (de->d_name[strlen(de->d_name)-1] == '~')
continue;
if (asprintf(&path, "%s/%s.wants/%s", *p, t, de->d_name) < 0) {
closedir(d);
return -ENOMEM;
}
if (!unit_name_is_valid(de->d_name)) {
log_info("Name of %s is not a valid unit name. Ignoring.", path);
free(path);
continue;
}
r = unit_add_dependency_by_name(u, UNIT_WANTS, path);
free(path);
if (r < 0) {
closedir(d);
return r;
}
}
closedir(d);
}
}
return 0;

60
load-fragment.c
View File

@ -1128,7 +1128,7 @@ static int load_from_path(Unit *u, const char *path) {
int r;
Set *symlink_names;
FILE *f;
char *filename, *id;
char *filename = NULL, *id;
sections[0] = "Meta";
sections[1] = section_table[u->meta.type];
@ -1137,18 +1137,56 @@ static int load_from_path(Unit *u, const char *path) {
if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
return -ENOMEM;
/* Instead of opening the path right away, we manually
* follow all symlinks and add their name to our unit
* name set while doing so */
if (!(filename = path_make_absolute(path, unit_path()))) {
r = -ENOMEM;
goto finish;
if (path_is_absolute(path)) {
if (!(filename = strdup(path))) {
r = -ENOMEM;
goto finish;
}
if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
free(filename);
filename = NULL;
if (r != -ENOENT)
goto finish;
}
} else {
char **p;
STRV_FOREACH(p, u->meta.manager->unit_path) {
/* Instead of opening the path right away, we manually
* follow all symlinks and add their name to our unit
* name set while doing so */
if (!(filename = path_make_absolute(path, *p))) {
r = -ENOMEM;
goto finish;
}
if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
char *sn;
free(filename);
filename = NULL;
if (r != -ENOENT)
goto finish;
/* Empty the symlink names for the next run */
while ((sn = set_steal_first(symlink_names)))
free(sn);
continue;
}
break;
}
}
if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
if (r == -ENOENT)
r = 0; /* returning 0 means: no suitable config file found */
if (!filename) {
r = 0; /* returning 0 means: no suitable config file found */
goto finish;
}

180
manager.c
View File

@ -70,6 +70,176 @@ static int manager_setup_signals(Manager *m) {
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")))
config_dirs = strv_split(e, ":");
else
config_dirs = strv_new("/etc/xdg", NULL);
if (!config_dirs)
goto fail;
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;
}
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;
}
/* FIXME: This should probably look for MANAGER_INIT, and exclude MANAGER_SYSTEM */
if (m->running_as != MANAGER_SESSION) {
/* /etc/init.d/ compativility 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;
}
}
strv_uniq(m->unit_path);
strv_uniq(m->sysvinit_path);
assert(!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);
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.");
return 0;
}
Manager* manager_new(void) {
Manager *m;
@ -81,13 +251,16 @@ Manager* manager_new(void) {
else if (getuid() == 0)
m->running_as = MANAGER_SYSTEM;
else
m->running_as = MANAGER_USER;
m->running_as = MANAGER_SESSION;
log_debug("systemd running in %s mode.", manager_running_as_to_string(m->running_as));
m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = -1;
m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
if (manager_find_paths(m) < 0)
goto fail;
if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
goto fail;
@ -146,6 +319,9 @@ void manager_free(Manager *m) {
if (m->signal_watch.fd >= 0)
close_nointr(m->signal_watch.fd);
strv_free(m->unit_path);
strv_free(m->sysvinit_path);
free(m);
}
@ -1360,7 +1536,7 @@ int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
static const char* const manager_running_as_table[_MANAGER_RUNNING_AS_MAX] = {
[MANAGER_INIT] = "init",
[MANAGER_SYSTEM] = "system",
[MANAGER_USER] = "user"
[MANAGER_SESSION] = "session"
};
DEFINE_STRING_TABLE_LOOKUP(manager_running_as, ManagerRunningAs);

5
manager.h
View File

@ -35,7 +35,7 @@ typedef struct Watch Watch;
typedef enum ManagerRunningAs {
MANAGER_INIT, /* root and pid=1 */
MANAGER_SYSTEM, /* root and pid!=1 */
MANAGER_USER, /* non-root */
MANAGER_SESSION, /* non-root */
_MANAGER_RUNNING_AS_MAX,
_MANAGER_RUNNING_AS_INVALID = -1
} ManagerRunningAs;
@ -123,6 +123,9 @@ struct Manager {
Watch signal_watch;
char **unit_path;
char **sysvinit_path;
/* Data specific to the device subsystem */
struct udev* udev;
struct udev_monitor* udev_monitor;

12
unit.c
View File

@ -972,16 +972,6 @@ int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name) {
return 0;
}
const char *unit_path(void) {
char *e;
if ((e = getenv("UNIT_PATH")))
if (path_is_absolute(e))
return e;
return UNIT_PATH;
}
int set_unit_path(const char *p) {
char *cwd, *c;
int r;
@ -1002,7 +992,7 @@ int set_unit_path(const char *p) {
return -ENOMEM;
}
if (setenv("UNIT_PATH", c, 0) < 0) {
if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) {
r = -errno;
free(c);
return r;

1
unit.h
View File

@ -282,7 +282,6 @@ void unit_unwatch_timer(Unit *u, Watch *w);
bool unit_job_is_applicable(Unit *u, JobType j);
const char *unit_path(void);
int set_unit_path(const char *p);
char *unit_name_escape_path(const char *prefix, const char *path, const char *suffix);