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 for (i = MAX_ARGS - 1; i >= 1; i--)
169 a->argv[i] = a->argv[i - 1];
173 a->proc.cb = child_exit;
178 static void askconsole(struct init_action *a)
180 char line[256], *tty, *split;
183 tty = get_cmdline_val("console", line, sizeof(line));
185 split = strchr(tty, ',');
189 if (!dev_exist(tty)) {
190 DEBUG(4, "skipping %s\n", tty);
194 console = strdup(tty);
202 a->tout.cb = respawn;
203 for (i = MAX_ARGS - 1; i >= 1; i--)
204 a->argv[i] = a->argv[i - 1];
208 a->proc.cb = child_exit;
213 static void rcrespawn(struct init_action *a)
215 a->tout.cb = respawn;
218 a->proc.cb = child_exit;
223 static struct init_handler handlers[] = {
235 .name = "askconsole",
243 .name = "askconsolelate",
247 .name = "respawnlate",
253 static int add_action(struct init_action *a, const char *name)
257 for (i = 0; i < ARRAY_SIZE(handlers); i++)
258 if (!strcmp(handlers[i].name, name)) {
259 a->handler = &handlers[i];
260 list_add_tail(&a->list, &actions);
263 ERROR("Unknown init handler %s\n", name);
267 void procd_inittab_run(const char *handler)
269 struct init_action *a;
271 list_for_each_entry(a, &actions, list)
272 if (!strcmp(a->handler->name, handler)) {
273 if (a->handler->multi) {
282 void procd_inittab(void)
285 FILE *fp = fopen(tab, "r");
286 struct init_action *a;
288 regmatch_t matches[5];
292 ERROR("Failed to open %s: %m\n", tab);
296 regcomp(&pat_inittab, "([a-zA-Z0-9]*):([a-zA-Z0-9]*):([a-zA-Z0-9]*):(.*)", REG_EXTENDED);
297 line = malloc(LINE_LEN);
298 a = calloc(1, sizeof(struct init_action));
300 while (fgets(line, LINE_LEN, fp)) {
301 char *tags[TAG_PROCESS + 1];
304 int len = strlen(line);
306 while (isspace(line[len - 1]))
313 if (regexec(&pat_inittab, line, 5, matches, 0))
316 DEBUG(4, "Parsing inittab - %s\n", line);
318 for (i = TAG_ID; i <= TAG_PROCESS; i++) {
319 line[matches[i].rm_eo] = '\0';
320 tags[i] = &line[matches[i + 1].rm_so];
323 tok = strtok(tags[TAG_PROCESS], " ");
324 for (i = 0; i < (MAX_ARGS - 1) && tok; i++) {
326 tok = strtok(NULL, " ");
329 a->id = tags[TAG_ID];
332 if (add_action(a, tags[TAG_ACTION]))
334 line = malloc(LINE_LEN);
335 a = calloc(1, sizeof(struct init_action));
341 regfree(&pat_inittab);