151 lines
3.9 KiB
C
151 lines
3.9 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <dirent.h>
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#include <errno.h>
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#include "unit.h"
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#include "load-dropin.h"
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#include "log.h"
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#include "strv.h"
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#include "unit-name.h"
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static int iterate_dir(Unit *u, const char *path, UnitDependency dependency) {
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DIR *d;
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struct dirent *de;
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int r;
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assert(u);
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assert(path);
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d = opendir(path);
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if (!d) {
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if (errno == ENOENT)
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return 0;
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return -errno;
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}
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while ((de = readdir(d))) {
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char *f;
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if (ignore_file(de->d_name))
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continue;
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f = strjoin(path, "/", de->d_name, NULL);
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if (!f) {
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r = -ENOMEM;
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goto finish;
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}
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r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true);
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free(f);
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if (r < 0)
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log_error("Cannot add dependency %s to %s, ignoring: %s", de->d_name, u->id, strerror(-r));
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}
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r = 0;
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finish:
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closedir(d);
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return r;
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}
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static int process_dir(Unit *u, const char *unit_path, const char *name, const char *suffix, UnitDependency dependency) {
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int r;
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char *path;
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assert(u);
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assert(unit_path);
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assert(name);
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assert(suffix);
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path = strjoin(unit_path, "/", name, suffix, NULL);
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if (!path)
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return -ENOMEM;
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if (u->manager->unit_path_cache &&
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!set_get(u->manager->unit_path_cache, path))
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r = 0;
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else
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r = iterate_dir(u, path, dependency);
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free(path);
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if (r < 0)
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return r;
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if (u->instance) {
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char *template;
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/* Also try the template dir */
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template = unit_name_template(name);
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if (!template)
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return -ENOMEM;
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path = strjoin(unit_path, "/", template, suffix, NULL);
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free(template);
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if (!path)
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return -ENOMEM;
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if (u->manager->unit_path_cache &&
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!set_get(u->manager->unit_path_cache, path))
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r = 0;
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else
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r = iterate_dir(u, path, dependency);
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free(path);
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if (r < 0)
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return r;
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}
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return 0;
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}
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int unit_load_dropin(Unit *u) {
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Iterator i;
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char *t;
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assert(u);
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/* Load dependencies from supplementary drop-in directories */
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SET_FOREACH(t, u->names, i) {
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char **p;
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STRV_FOREACH(p, u->manager->lookup_paths.unit_path) {
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int r;
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r = process_dir(u, *p, t, ".wants", UNIT_WANTS);
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if (r < 0)
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return r;
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r = process_dir(u, *p, t, ".requires", UNIT_REQUIRES);
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if (r < 0)
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return r;
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}
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}
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return 0;
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}
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