This source file includes following definitions.
- user_config_home
- user_runtime_dir
- user_dirs
- lookup_paths_init
- lookup_paths_free
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "util.h"
#include "mkdir.h"
#include "strv.h"
#include "path-util.h"
#include "path-lookup.h"
int user_config_home(char **config_home) {
const char *e;
char *r;
e = getenv("XDG_CONFIG_HOME");
if (e) {
r = strappend(e, "/systemd/user");
if (!r)
return -ENOMEM;
*config_home = r;
return 1;
} else {
const char *home;
home = getenv("HOME");
if (home) {
r = strappend(home, "/.config/systemd/user");
if (!r)
return -ENOMEM;
*config_home = r;
return 1;
}
}
return 0;
}
int user_runtime_dir(char **runtime_dir) {
const char *e;
char *r;
e = getenv("XDG_RUNTIME_DIR");
if (e) {
r = strappend(e, "/systemd/user");
if (!r)
return -ENOMEM;
*runtime_dir = r;
return 1;
}
return 0;
}
static char** user_dirs(
const char *generator,
const char *generator_early,
const char *generator_late) {
const char * const config_unit_paths[] = {
USER_CONFIG_UNIT_PATH,
"/etc/systemd/user",
NULL
};
const char * const runtime_unit_path = "/run/systemd/user";
const char * const data_unit_paths[] = {
"/usr/local/lib/systemd/user",
"/usr/local/share/systemd/user",
USER_DATA_UNIT_PATH,
"/usr/lib/systemd/user",
"/usr/share/systemd/user",
NULL
};
const char *home, *e;
_cleanup_free_ char *config_home = NULL, *runtime_dir = NULL, *data_home = NULL;
_cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
char **r = NULL;
if (user_config_home(&config_home) < 0)
goto fail;
if (user_runtime_dir(&runtime_dir) < 0)
goto fail;
home = getenv("HOME");
e = getenv("XDG_CONFIG_DIRS");
if (e) {
config_dirs = strv_split(e, ":");
if (!config_dirs)
goto fail;
}
e = getenv("XDG_DATA_HOME");
if (e) {
if (asprintf(&data_home, "%s/systemd/user", e) < 0)
goto fail;
} else if (home) {
if (asprintf(&data_home, "%s/.local/share/systemd/user", home) < 0)
goto fail;
}
e = getenv("XDG_DATA_DIRS");
if (e)
data_dirs = strv_split(e, ":");
else
data_dirs = strv_new("/usr/local/share",
"/usr/share",
NULL);
if (!data_dirs)
goto fail;
if (generator_early)
if (strv_extend(&r, generator_early) < 0)
goto fail;
if (config_home)
if (strv_extend(&r, config_home) < 0)
goto fail;
if (!strv_isempty(config_dirs))
if (strv_extend_strv_concat(&r, config_dirs, "/systemd/user") < 0)
goto fail;
if (strv_extend_strv(&r, (char**) config_unit_paths) < 0)
goto fail;
if (runtime_dir)
if (strv_extend(&r, runtime_dir) < 0)
goto fail;
if (strv_extend(&r, runtime_unit_path) < 0)
goto fail;
if (generator)
if (strv_extend(&r, generator) < 0)
goto fail;
if (data_home)
if (strv_extend(&r, data_home) < 0)
goto fail;
if (!strv_isempty(data_dirs))
if (strv_extend_strv_concat(&r, data_dirs, "/systemd/user") < 0)
goto fail;
if (strv_extend_strv(&r, (char**) data_unit_paths) < 0)
goto fail;
if (generator_late)
if (strv_extend(&r, generator_late) < 0)
goto fail;
if (!path_strv_make_absolute_cwd(r))
goto fail;
return r;
fail:
strv_free(r);
return NULL;
}
int lookup_paths_init(
LookupPaths *p,
SystemdRunningAs running_as,
bool personal,
const char *root_dir,
const char *generator,
const char *generator_early,
const char *generator_late) {
const char *e;
bool append = false;
assert(p);
e = getenv("SYSTEMD_UNIT_PATH");
if (e) {
if (endswith(e, ":")) {
e = strndupa(e, strlen(e) - 1);
append = true;
}
p->unit_path = path_split_and_make_absolute(e);
if (!p->unit_path)
return -ENOMEM;
} else
p->unit_path = NULL;
if (!p->unit_path || append) {
_cleanup_strv_free_ char **unit_path;
int r;
if (running_as == SYSTEMD_USER) {
if (personal)
unit_path = user_dirs(generator, generator_early, generator_late);
else
unit_path = strv_new(
STRV_IFNOTNULL(generator_early),
USER_CONFIG_UNIT_PATH,
"/etc/systemd/user",
"/run/systemd/user",
STRV_IFNOTNULL(generator),
"/usr/local/lib/systemd/user",
"/usr/local/share/systemd/user",
USER_DATA_UNIT_PATH,
"/usr/lib/systemd/user",
"/usr/share/systemd/user",
STRV_IFNOTNULL(generator_late),
NULL);
} else
unit_path = strv_new(
STRV_IFNOTNULL(generator_early),
SYSTEM_CONFIG_UNIT_PATH,
"/etc/systemd/system",
"/run/systemd/system",
STRV_IFNOTNULL(generator),
"/usr/local/lib/systemd/system",
SYSTEM_DATA_UNIT_PATH,
"/usr/lib/systemd/system",
#ifdef HAVE_SPLIT_USR
"/lib/systemd/system",
#endif
STRV_IFNOTNULL(generator_late),
NULL);
if (!unit_path)
return -ENOMEM;
r = strv_extend_strv(&p->unit_path, unit_path);
if (r < 0)
return r;
}
if (!path_strv_resolve_uniq(p->unit_path, root_dir))
return -ENOMEM;
if (!strv_isempty(p->unit_path)) {
_cleanup_free_ char *t = strv_join(p->unit_path, "\n\t");
if (!t)
return -ENOMEM;
log_debug("Looking for unit files in (higher priority first):\n\t%s", t);
} else {
log_debug("Ignoring unit files.");
strv_free(p->unit_path);
p->unit_path = NULL;
}
if (running_as == SYSTEMD_SYSTEM) {
#ifdef HAVE_SYSV_COMPAT
e = getenv("SYSTEMD_SYSVINIT_PATH");
if (e) {
p->sysvinit_path = path_split_and_make_absolute(e);
if (!p->sysvinit_path)
return -ENOMEM;
} else
p->sysvinit_path = NULL;
if (strv_isempty(p->sysvinit_path)) {
strv_free(p->sysvinit_path);
p->sysvinit_path = strv_new(
SYSTEM_SYSVINIT_PATH,
NULL);
if (!p->sysvinit_path)
return -ENOMEM;
}
e = getenv("SYSTEMD_SYSVRCND_PATH");
if (e) {
p->sysvrcnd_path = path_split_and_make_absolute(e);
if (!p->sysvrcnd_path)
return -ENOMEM;
} else
p->sysvrcnd_path = NULL;
if (strv_isempty(p->sysvrcnd_path)) {
strv_free(p->sysvrcnd_path);
p->sysvrcnd_path = strv_new(
SYSTEM_SYSVRCND_PATH,
NULL);
if (!p->sysvrcnd_path)
return -ENOMEM;
}
if (!path_strv_resolve_uniq(p->sysvinit_path, root_dir))
return -ENOMEM;
if (!path_strv_resolve_uniq(p->sysvrcnd_path, root_dir))
return -ENOMEM;
if (!strv_isempty(p->sysvinit_path)) {
_cleanup_free_ char *t = strv_join(p->sysvinit_path, "\n\t");
if (!t)
return -ENOMEM;
log_debug("Looking for SysV init scripts in:\n\t%s", t);
} else {
log_debug("Ignoring SysV init scripts.");
strv_free(p->sysvinit_path);
p->sysvinit_path = NULL;
}
if (!strv_isempty(p->sysvrcnd_path)) {
_cleanup_free_ char *t =
strv_join(p->sysvrcnd_path, "\n\t");
if (!t)
return -ENOMEM;
log_debug("Looking for SysV rcN.d links in:\n\t%s", t);
} else {
log_debug("Ignoring SysV rcN.d links.");
strv_free(p->sysvrcnd_path);
p->sysvrcnd_path = NULL;
}
#else
log_debug("SysV init scripts and rcN.d links support disabled");
#endif
}
return 0;
}
void lookup_paths_free(LookupPaths *p) {
assert(p);
strv_free(p->unit_path);
p->unit_path = NULL;
#ifdef HAVE_SYSV_COMPAT
strv_free(p->sysvinit_path);
strv_free(p->sysvrcnd_path);
p->sysvinit_path = p->sysvrcnd_path = NULL;
#endif
}