/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <dirent.h> #include <errno.h> #include "unit.h" #include "load-dropin.h" #include "log.h" #include "strv.h" #include "unit-name.h" static int iterate_dir(Unit *u, const char *path, UnitDependency dependency) { DIR *d; struct dirent *de; int r; assert(u); assert(path); d = opendir(path); if (!d) { if (errno == ENOENT) return 0; return -errno; } while ((de = readdir(d))) { char *f; if (ignore_file(de->d_name)) continue; f = join(path, "/", de->d_name, NULL); if (!f) { r = -ENOMEM; goto finish; } r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true); free(f); if (r < 0) log_error("Cannot add dependency %s to %s, ignoring: %s", de->d_name, u->id, strerror(-r)); } r = 0; finish: closedir(d); return r; } static int process_dir(Unit *u, const char *unit_path, const char *name, const char *suffix, UnitDependency dependency) { int r; char *path; assert(u); assert(unit_path); assert(name); assert(suffix); path = join(unit_path, "/", name, suffix, NULL); if (!path) return -ENOMEM; if (u->manager->unit_path_cache && !set_get(u->manager->unit_path_cache, path)) r = 0; else r = iterate_dir(u, path, dependency); free(path); if (r < 0) return r; if (u->instance) { char *template; /* Also try the template dir */ template = unit_name_template(name); if (!template) return -ENOMEM; path = join(unit_path, "/", template, suffix, NULL); free(template); if (!path) return -ENOMEM; if (u->manager->unit_path_cache && !set_get(u->manager->unit_path_cache, path)) r = 0; else r = iterate_dir(u, path, dependency); free(path); if (r < 0) return r; } return 0; } int unit_load_dropin(Unit *u) { Iterator i; char *t; assert(u); /* Load dependencies from supplementary drop-in directories */ SET_FOREACH(t, u->names, i) { char **p; STRV_FOREACH(p, u->manager->lookup_paths.unit_path) { int r; r = process_dir(u, *p, t, ".wants", UNIT_WANTS); if (r < 0) return r; r = process_dir(u, *p, t, ".requires", UNIT_REQUIRES); if (r < 0) return r; } } return 0; }