2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
16 #include <sys/types.h>
18 #include <sys/ioctl.h>
27 #include <libubox/utils.h>
28 #include <libubox/list.h>
30 #include "utils/utils.h"
35 #define O_PATH 010000000
50 void (*cb) (struct init_action *a);
55 struct list_head list;
61 struct init_handler *handler;
62 struct uloop_process proc;
65 struct uloop_timeout tout;
68 static const char *tab = "/etc/inittab";
69 static char *ask = "/sbin/askfirst";
71 static LIST_HEAD(actions);
73 static int dev_exist(const char *dev)
77 dfd = open("/dev", O_PATH|O_DIRECTORY);
82 fd = openat(dfd, dev, O_RDONLY);
92 static void fork_worker(struct init_action *a)
100 if (patch_stdio(a->id))
101 ERROR("Failed to setup i/o redirection\n");
103 ioctl(STDIN_FILENO, TIOCSCTTY, 1);
104 tcsetpgrp(STDIN_FILENO, p);
106 execvp(a->argv[0], a->argv);
107 ERROR("Failed to execute %s: %m\n", a->argv[0]);
111 if (a->proc.pid > 0) {
112 DEBUG(4, "Launched new %s action, pid=%d\n",
115 uloop_process_add(&a->proc);
119 static void child_exit(struct uloop_process *proc, int ret)
121 struct init_action *a = container_of(proc, struct init_action, proc);
123 DEBUG(4, "pid:%d, exitcode:%d\n", proc->pid, ret);
126 if (!dev_exist(a->id)) {
127 DEBUG(4, "Skipping respawn: device '%s' does not exist anymore\n", a->id);
131 uloop_timeout_set(&a->tout, a->respawn);
134 static void respawn(struct uloop_timeout *tout)
136 struct init_action *a = container_of(tout, struct init_action, tout);
141 static void rcdone(struct runqueue *q)
146 static void runrc(struct init_action *a)
148 if (!a->argv[1] || !a->argv[2]) {
149 ERROR("valid format is rcS <S|K> <param>\n");
153 /* proceed even if no init or shutdown scripts run */
154 if (rcS(a->argv[1], a->argv[2], rcdone))
158 static void askfirst(struct init_action *a)
162 if (!dev_exist(a->id) || (console && !strcmp(console, a->id))) {
163 DEBUG(4, "Skipping %s\n", a->id);
167 a->tout.cb = respawn;
168 /* shift arguments only if not yet done */
169 if (a->argv[0] != ask) {
170 for (i = MAX_ARGS - 1; i >= 1; i--)
171 a->argv[i] = a->argv[i - 1];
176 a->proc.cb = child_exit;
181 static void askconsole(struct init_action *a)
183 char line[256], *tty, *split;
186 tty = get_cmdline_val("console", line, sizeof(line));
188 split = strchr(tty, ',');
192 if (!dev_exist(tty)) {
193 DEBUG(4, "skipping %s\n", tty);
197 console = strdup(tty);
205 a->tout.cb = respawn;
206 /* shift arguments only if not yet done */
207 if (a->argv[0] != ask) {
208 for (i = MAX_ARGS - 1; i >= 1; i--)
209 a->argv[i] = a->argv[i - 1];
214 a->proc.cb = child_exit;
219 static void rcrespawn(struct init_action *a)
221 a->tout.cb = respawn;
224 a->proc.cb = child_exit;
229 static struct init_handler handlers[] = {
241 .name = "askconsole",
249 .name = "askconsolelate",
253 .name = "respawnlate",
259 static int add_action(struct init_action *a, const char *name)
263 for (i = 0; i < ARRAY_SIZE(handlers); i++)
264 if (!strcmp(handlers[i].name, name)) {
265 a->handler = &handlers[i];
266 list_add_tail(&a->list, &actions);
269 ERROR("Unknown init handler %s\n", name);
273 void procd_inittab_run(const char *handler)
275 struct init_action *a;
277 list_for_each_entry(a, &actions, list)
278 if (!strcmp(a->handler->name, handler)) {
280 if (!a->handler->multi)
285 void procd_inittab(void)
288 FILE *fp = fopen(tab, "r");
289 struct init_action *a;
291 regmatch_t matches[5];
295 ERROR("Failed to open %s: %m\n", tab);
299 regcomp(&pat_inittab, "([a-zA-Z0-9]*):([a-zA-Z0-9]*):([a-zA-Z0-9]*):(.*)", REG_EXTENDED);
300 line = malloc(LINE_LEN);
301 a = calloc(1, sizeof(struct init_action));
303 while (fgets(line, LINE_LEN, fp)) {
304 char *tags[TAG_PROCESS + 1];
307 int len = strlen(line);
309 while (isspace(line[len - 1]))
316 if (regexec(&pat_inittab, line, 5, matches, 0))
319 DEBUG(4, "Parsing inittab - %s\n", line);
321 for (i = TAG_ID; i <= TAG_PROCESS; i++) {
322 line[matches[i].rm_eo] = '\0';
323 tags[i] = &line[matches[i + 1].rm_so];
326 tok = strtok(tags[TAG_PROCESS], " ");
327 for (i = 0; i < (MAX_ARGS - 1) && tok; i++) {
329 tok = strtok(NULL, " ");
332 a->id = tags[TAG_ID];
335 if (add_action(a, tags[TAG_ACTION]))
337 line = malloc(LINE_LEN);
338 a = calloc(1, sizeof(struct init_action));
344 regfree(&pat_inittab);