This source file includes following definitions.
- iterate_dir
- process_dir
- unit_find_dropin_paths
- unit_load_dropin
#include <dirent.h>
#include <errno.h>
#include "unit.h"
#include "load-dropin.h"
#include "log.h"
#include "strv.h"
#include "unit-name.h"
#include "conf-parser.h"
#include "load-fragment.h"
#include "conf-files.h"
static int iterate_dir(
Unit *u,
const char *path,
UnitDependency dependency,
char ***strv) {
_cleanup_closedir_ DIR *d = NULL;
int r;
assert(u);
assert(path);
if (dependency < 0) {
r = strv_extend(strv, path);
if (r < 0)
return log_oom();
return 0;
}
d = opendir(path);
if (!d) {
if (errno == ENOENT)
return 0;
log_error("Failed to open directory %s: %m", path);
return -errno;
}
for (;;) {
struct dirent *de;
_cleanup_free_ char *f = NULL;
int k;
errno = 0;
de = readdir(d);
if (!de && errno != 0) {
k = errno;
log_error("Failed to read directory %s: %s", path, strerror(k));
return -k;
}
if (!de)
break;
if (ignore_file(de->d_name))
continue;
f = strjoin(path, "/", de->d_name, NULL);
if (!f)
return log_oom();
r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true);
if (r < 0)
log_error("Cannot add dependency %s to %s, ignoring: %s", de->d_name, u->id, strerror(-r));
}
return 0;
}
static int process_dir(
Unit *u,
const char *unit_path,
const char *name,
const char *suffix,
UnitDependency dependency,
char ***strv) {
_cleanup_free_ char *path = NULL;
assert(u);
assert(unit_path);
assert(name);
assert(suffix);
path = strjoin(unit_path, "/", name, suffix, NULL);
if (!path)
return log_oom();
if (!u->manager->unit_path_cache || set_get(u->manager->unit_path_cache, path))
iterate_dir(u, path, dependency, strv);
if (u->instance) {
_cleanup_free_ char *template = NULL, *p = NULL;
template = unit_name_template(name);
if (!template)
return log_oom();
p = strjoin(unit_path, "/", template, suffix, NULL);
if (!p)
return log_oom();
if (!u->manager->unit_path_cache || set_get(u->manager->unit_path_cache, p))
iterate_dir(u, p, dependency, strv);
}
return 0;
}
char **unit_find_dropin_paths(Unit *u) {
_cleanup_strv_free_ char **strv = NULL;
char **configs = NULL;
Iterator i;
char *t;
int r;
assert(u);
SET_FOREACH(t, u->names, i) {
char **p;
STRV_FOREACH(p, u->manager->lookup_paths.unit_path)
process_dir(u, *p, t, ".d", _UNIT_DEPENDENCY_INVALID, &strv);
}
if (strv_isempty(strv))
return NULL;
r = conf_files_list_strv(&configs, ".conf", NULL, (const char**) strv);
if (r < 0) {
log_error("Failed to get list of configuration files: %s", strerror(-r));
strv_free(configs);
return NULL;
}
return configs;
}
int unit_load_dropin(Unit *u) {
Iterator i;
char *t, **f;
assert(u);
SET_FOREACH(t, u->names, i) {
char **p;
STRV_FOREACH(p, u->manager->lookup_paths.unit_path) {
process_dir(u, *p, t, ".wants", UNIT_WANTS, NULL);
process_dir(u, *p, t, ".requires", UNIT_REQUIRES, NULL);
}
}
u->dropin_paths = unit_find_dropin_paths(u);
if (!u->dropin_paths)
return 0;
STRV_FOREACH(f, u->dropin_paths) {
config_parse(u->id, *f, NULL,
UNIT_VTABLE(u)->sections,
config_item_perf_lookup, load_fragment_gperf_lookup,
false, false, false, u);
}
u->dropin_mtime = now(CLOCK_REALTIME);
return 0;
}