/*-*- 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 Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser 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" #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); /* The config directories are special, since the order of the * drop-ins matters */ 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; return -errno; } for (;;) { struct dirent *de; union dirent_storage buf; _cleanup_free_ char *f = NULL; int k; k = readdir_r(d, &buf.de, &de); if (k != 0) { 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) { int r; char *path; 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)) r = 0; else r = iterate_dir(u, path, dependency, strv); 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 log_oom(); path = strjoin(unit_path, "/", template, suffix, NULL); free(template); if (!path) return log_oom(); if (u->manager->unit_path_cache && !set_get(u->manager->unit_path_cache, path)) r = 0; else r = iterate_dir(u, path, dependency, strv); free(path); if (r < 0) return r; } 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) { /* This loads the drop-in config snippets */ r = process_dir(u, *p, t, ".d", _UNIT_DEPENDENCY_INVALID, &strv); if (r < 0) return NULL; } } 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; int r; 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) { r = process_dir(u, *p, t, ".wants", UNIT_WANTS, NULL); if (r < 0) return r; r = process_dir(u, *p, t, ".requires", UNIT_REQUIRES, NULL); if (r < 0) return r; } } u->dropin_paths = unit_find_dropin_paths(u); if (! u->dropin_paths) return 0; STRV_FOREACH(f, u->dropin_paths) { r = config_parse(u->id, *f, NULL, UNIT_VTABLE(u)->sections, config_item_perf_lookup, (void*) load_fragment_gperf_lookup, false, false, u); if (r < 0) return r; } u->dropin_mtime = now(CLOCK_REALTIME); return 0; }