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;
34 spawn_procd(struct uloop_process *proc, int ret)
36 char *wdt_fd = watchdog_fd();
37 char *argv[] = { "/sbin/procd", "-d", "0", NULL };
40 if (plugd_proc.pid > 0)
41 kill(plugd_proc.pid, SIGKILL);
43 if (!stat("/tmp/sysupgrade", &s))
47 unsetenv("INITRAMFS");
49 DEBUG(2, "Exec to real procd now\n");
51 setenv("WDTFD", wdt_fd, 1);
53 snprintf(argv[2], 2, "%d", debug & 0xf);
56 execvp(argv[0], argv);
60 plugd_proc_cb(struct uloop_process *proc, int ret)
68 char *init[] = { "/bin/sh", "/etc/preinit", NULL };
69 char *plug[] = { "/sbin/procd", "-h", "/etc/hotplug-preinit.json", NULL };
73 plugd_proc.cb = plugd_proc_cb;
74 plugd_proc.pid = fork();
75 if (!plugd_proc.pid) {
76 execvp(plug[0], plug);
77 ERROR("Failed to start plugd\n");
80 if (plugd_proc.pid <= 0) {
81 ERROR("Failed to start new plugd instance\n");
84 uloop_process_add(&plugd_proc);
86 setenv("PREINIT", "1", 1);
88 preinit_proc.cb = spawn_procd;
89 preinit_proc.pid = fork();
90 if (!preinit_proc.pid) {
91 execvp(init[0], init);
92 ERROR("Failed to start preinit\n");
95 if (preinit_proc.pid <= 0) {
96 ERROR("Failed to start new preinit instance\n");
99 uloop_process_add(&preinit_proc);
101 DEBUG(4, "Launched preinit instance, pid=%d\n", (int) preinit_proc.pid);