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"
46 void (*cb) (struct init_action *a);
51 struct list_head list;
57 struct init_handler *handler;
58 struct uloop_process proc;
61 struct uloop_timeout tout;
64 static const char *tab = "/etc/inittab";
65 static char *ask = "/sbin/askfirst";
67 static LIST_HEAD(actions);
69 static int dev_exist(const char *dev)
73 dfd = open("/dev", O_PATH|O_DIRECTORY);
78 fd = openat(dfd, dev, O_RDONLY);
88 static void fork_worker(struct init_action *a)
96 if (patch_stdio(a->id))
97 ERROR("Failed to setup i/o redirection\n");
99 ioctl(STDIN_FILENO, TIOCSCTTY, 1);
100 tcsetpgrp(STDIN_FILENO, p);
102 execvp(a->argv[0], a->argv);
103 ERROR("Failed to execute %s\n", a->argv[0]);
107 if (a->proc.pid > 0) {
108 DEBUG(4, "Launched new %s action, pid=%d\n",
111 uloop_process_add(&a->proc);
115 static void child_exit(struct uloop_process *proc, int ret)
117 struct init_action *a = container_of(proc, struct init_action, proc);
119 DEBUG(4, "pid:%d\n", proc->pid);
120 uloop_timeout_set(&a->tout, a->respawn);
123 static void respawn(struct uloop_timeout *tout)
125 struct init_action *a = container_of(tout, struct init_action, tout);
129 static void rcdone(struct runqueue *q)
134 static void runrc(struct init_action *a)
136 if (!a->argv[1] || !a->argv[2]) {
137 ERROR("valid format is rcS <S|K> <param>\n");
141 /* proceed even if no init or shutdown scripts run */
142 if (rcS(a->argv[1], a->argv[2], rcdone))
146 static void askfirst(struct init_action *a)
150 if (!dev_exist(a->id) || (console && !strcmp(console, a->id))) {
151 DEBUG(4, "Skipping %s\n", a->id);
155 a->tout.cb = respawn;
156 for (i = MAX_ARGS - 1; i >= 1; i--)
157 a->argv[i] = a->argv[i - 1];
161 a->proc.cb = child_exit;
165 static void askconsole(struct init_action *a)
167 char line[256], *tty, *split;
170 tty = get_cmdline_val("console", line, sizeof(line));
172 split = strchr(tty, ',');
176 if (!dev_exist(tty)) {
177 DEBUG(4, "skipping %s\n", tty);
181 console = strdup(tty);
189 a->tout.cb = respawn;
190 for (i = MAX_ARGS - 1; i >= 1; i--)
191 a->argv[i] = a->argv[i - 1];
195 a->proc.cb = child_exit;
199 static void rcrespawn(struct init_action *a)
201 a->tout.cb = respawn;
204 a->proc.cb = child_exit;
208 static struct init_handler handlers[] = {
220 .name = "askconsole",
230 static int add_action(struct init_action *a, const char *name)
234 for (i = 0; i < ARRAY_SIZE(handlers); i++)
235 if (!strcmp(handlers[i].name, name)) {
236 a->handler = &handlers[i];
237 list_add_tail(&a->list, &actions);
240 ERROR("Unknown init handler %s\n", name);
244 void procd_inittab_run(const char *handler)
246 struct init_action *a;
248 list_for_each_entry(a, &actions, list)
249 if (!strcmp(a->handler->name, handler)) {
250 if (a->handler->multi) {
259 void procd_inittab(void)
262 FILE *fp = fopen(tab, "r");
263 struct init_action *a;
265 regmatch_t matches[5];
269 ERROR("Failed to open %s\n", tab);
273 regcomp(&pat_inittab, "([a-zA-Z0-9]*):([a-zA-Z0-9]*):([a-zA-Z0-9]*):(.*)", REG_EXTENDED);
274 line = malloc(LINE_LEN);
275 a = malloc(sizeof(struct init_action));
276 memset(a, 0, sizeof(struct init_action));
278 while (fgets(line, LINE_LEN, fp)) {
279 char *tags[TAG_PROCESS + 1];
282 int len = strlen(line);
284 while (isspace(line[len - 1]))
291 if (regexec(&pat_inittab, line, 5, matches, 0))
294 DEBUG(4, "Parsing inittab - %s", line);
296 for (i = TAG_ID; i <= TAG_PROCESS; i++) {
297 line[matches[i].rm_eo] = '\0';
298 tags[i] = &line[matches[i + 1].rm_so];
301 tok = strtok(tags[TAG_PROCESS], " ");
302 for (i = 0; i < (MAX_ARGS - 1) && tok; i++) {
304 tok = strtok(NULL, " ");
307 a->id = tags[TAG_ID];
310 if (add_action(a, tags[TAG_ACTION]))
312 line = malloc(LINE_LEN);
313 a = malloc(sizeof(struct init_action));
314 memset(a, 0, sizeof(struct init_action));
320 regfree(&pat_inittab);