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>
17 #include <sys/mount.h>
19 #include <libubox/uloop.h>
20 #include <libubox/utils.h>
28 #include "../watchdog.h"
30 static struct uloop_process preinit_proc;
31 static struct uloop_process plugd_proc;
36 FILE *fp = fopen("/tmp/debug_level", "r");
41 fscanf(fp, "%d", &lvl);
43 unlink("/tmp/debug_level");
45 if (lvl > 0 && lvl < 5)
50 spawn_procd(struct uloop_process *proc, int ret)
52 char *wdt_fd = watchdog_fd();
53 char *argv[] = { "/sbin/procd", NULL};
57 if (plugd_proc.pid > 0)
58 kill(plugd_proc.pid, SIGKILL);
60 if (!stat("/tmp/sysupgrade", &s))
64 unsetenv("INITRAMFS");
66 DEBUG(2, "Exec to real procd now\n");
68 setenv("WDTFD", wdt_fd, 1);
71 snprintf(dbg, 2, "%d", debug);
72 setenv("DBGLVL", dbg, 1);
75 execvp(argv[0], argv);
79 plugd_proc_cb(struct uloop_process *proc, int ret)
87 char *init[] = { "/bin/sh", "/etc/preinit", NULL };
88 char *plug[] = { "/sbin/procd", "-h", "/etc/hotplug-preinit.json", NULL };
92 plugd_proc.cb = plugd_proc_cb;
93 plugd_proc.pid = fork();
94 if (!plugd_proc.pid) {
95 execvp(plug[0], plug);
96 ERROR("Failed to start plugd\n");
99 if (plugd_proc.pid <= 0) {
100 ERROR("Failed to start new plugd instance\n");
103 uloop_process_add(&plugd_proc);
105 setenv("PREINIT", "1", 1);
107 preinit_proc.cb = spawn_procd;
108 preinit_proc.pid = fork();
109 if (!preinit_proc.pid) {
110 execvp(init[0], init);
111 ERROR("Failed to start preinit\n");
114 if (preinit_proc.pid <= 0) {
115 ERROR("Failed to start new preinit instance\n");
118 uloop_process_add(&preinit_proc);
120 DEBUG(4, "Launched preinit instance, pid=%d\n", (int) preinit_proc.pid);