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.
15 #include <sys/types.h>
25 #include <libubox/utils.h>
26 #include <libubox/list.h>
43 void (*cb) (struct init_action *a);
48 struct list_head list;
54 struct init_handler *handler;
55 struct uloop_process proc;
58 struct uloop_timeout tout;
61 static const char *tab = "/etc/inittab";
62 static char *ask = "/sbin/askfirst";
64 static LIST_HEAD(actions);
66 static void fork_worker(struct init_action *a)
70 execvp(a->argv[0], a->argv);
71 ERROR("Failed to execute %s\n", a->argv[0]);
75 if (a->proc.pid > 0) {
76 DEBUG(4, "Launched new %s action, pid=%d\n",
79 uloop_process_add(&a->proc);
83 static void child_exit(struct uloop_process *proc, int ret)
85 struct init_action *a = container_of(proc, struct init_action, proc);
87 DEBUG(4, "pid:%d\n", proc->pid);
88 uloop_timeout_set(&a->tout, a->respawn);
91 static void respawn(struct uloop_timeout *tout)
93 struct init_action *a = container_of(tout, struct init_action, tout);
97 static void rcdone(struct runqueue *q)
102 static void runrc(struct init_action *a)
104 if (!a->argv[1] || !a->argv[2]) {
105 ERROR("valid format is rcS <S|K> <param>\n");
108 rcS(a->argv[1], a->argv[2], rcdone);
111 static void askfirst(struct init_action *a)
119 if (i || (console && !strcmp(console, a->id))) {
120 DEBUG(4, "Skipping %s\n", a->id);
124 a->tout.cb = respawn;
125 for (i = MAX_ARGS - 2; i >= 2; i--)
126 a->argv[i] = a->argv[i - 2];
131 a->proc.cb = child_exit;
135 static void askconsole(struct init_action *a)
138 char line[256], *tty;
139 int i, r, fd = open("/proc/cmdline", O_RDONLY);
141 regmatch_t matches[2];
146 r = read(fd, line, sizeof(line) - 1);
150 regcomp(&pat_cmdline, "console=([a-zA-Z0-9]*)", REG_EXTENDED);
151 if (regexec(&pat_cmdline, line, 2, matches, 0))
153 line[matches[1].rm_eo] = '\0';
154 tty = &line[matches[1].rm_so];
160 DEBUG(4, "skipping %s\n", tty);
163 console = strdup(tty);
165 a->tout.cb = respawn;
166 for (i = MAX_ARGS - 2; i >= 2; i--)
167 a->argv[i] = a->argv[i - 2];
169 a->argv[1] = strdup(tty);
172 a->proc.cb = child_exit;
176 regfree(&pat_cmdline);
179 static void rcrespawn(struct init_action *a)
181 a->tout.cb = respawn;
184 a->proc.cb = child_exit;
188 static struct init_handler handlers[] = {
200 .name = "askconsole",
210 static int add_action(struct init_action *a, const char *name)
214 for (i = 0; i < ARRAY_SIZE(handlers); i++)
215 if (!strcmp(handlers[i].name, name)) {
216 a->handler = &handlers[i];
217 list_add_tail(&a->list, &actions);
220 ERROR("Unknown init handler %s\n", name);
224 void procd_inittab_run(const char *handler)
226 struct init_action *a;
228 list_for_each_entry(a, &actions, list)
229 if (!strcmp(a->handler->name, handler)) {
230 if (a->handler->multi) {
239 void procd_inittab(void)
242 FILE *fp = fopen(tab, "r");
243 struct init_action *a;
245 regmatch_t matches[5];
249 ERROR("Failed to open %s\n", tab);
253 regcomp(&pat_inittab, "([a-zA-Z0-9]*):([a-zA-Z0-9]*):([a-zA-Z0-9]*):(.*)", REG_EXTENDED);
254 line = malloc(LINE_LEN);
255 a = malloc(sizeof(struct init_action));
256 memset(a, 0, sizeof(struct init_action));
258 while (fgets(line, LINE_LEN, fp)) {
259 char *tags[TAG_PROCESS + 1];
262 int len = strlen(line);
264 while (isspace(line[len - 1]))
271 if (regexec(&pat_inittab, line, 5, matches, 0))
274 DEBUG(4, "Parsing inittab - %s", line);
276 for (i = TAG_ID; i <= TAG_PROCESS; i++) {
277 line[matches[i].rm_eo] = '\0';
278 tags[i] = &line[matches[i + 1].rm_so];
281 tok = strtok(tags[TAG_PROCESS], " ");
282 for (i = 0; i < (MAX_ARGS - i - 1) && tok; i++) {
284 tok = strtok(NULL, " ");
287 a->id = tags[TAG_ID];
290 if (add_action(a, tags[TAG_ACTION]))
292 line = malloc(LINE_LEN);
293 a = malloc(sizeof(struct init_action));
294 memset(a, 0, sizeof(struct init_action));
300 regfree(&pat_inittab);