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>
20 #include <libubox/uloop.h>
21 #include <libubox/utils.h>
29 #include "../watchdog.h"
31 static struct uloop_process preinit_proc;
32 static struct uloop_process plugd_proc;
37 FILE *fp = fopen("/tmp/debug_level", "r");
42 if (fscanf(fp, "%d", &lvl) == EOF)
43 ERROR("failed to read debug level\n");
45 unlink("/tmp/debug_level");
47 if (lvl > 0 && lvl < 5)
52 spawn_procd(struct uloop_process *proc, int ret)
54 char *wdt_fd = watchdog_fd();
55 char *argv[] = { "/sbin/procd", NULL};
59 if (plugd_proc.pid > 0)
60 kill(plugd_proc.pid, SIGKILL);
62 if (!stat("/tmp/sysupgrade", &s))
66 unsetenv("INITRAMFS");
68 unlink("/tmp/.preinit");
69 DEBUG(2, "Exec to real procd now\n");
71 setenv("WDTFD", wdt_fd, 1);
74 snprintf(dbg, 2, "%d", debug);
75 setenv("DBGLVL", dbg, 1);
78 execvp(argv[0], argv);
82 plugd_proc_cb(struct uloop_process *proc, int ret)
90 char *init[] = { "/bin/sh", "/etc/preinit", NULL };
91 char *plug[] = { "/sbin/procd", "-h", "/etc/hotplug-preinit.json", NULL };
96 plugd_proc.cb = plugd_proc_cb;
97 plugd_proc.pid = fork();
98 if (!plugd_proc.pid) {
99 execvp(plug[0], plug);
100 ERROR("Failed to start plugd\n");
103 if (plugd_proc.pid <= 0) {
104 ERROR("Failed to start new plugd instance\n");
107 uloop_process_add(&plugd_proc);
109 setenv("PREINIT", "1", 1);
111 fd = creat("/tmp/.preinit", 0600);
114 ERROR("Failed to create sentinel file\n");
118 preinit_proc.cb = spawn_procd;
119 preinit_proc.pid = fork();
120 if (!preinit_proc.pid) {
121 execvp(init[0], init);
122 ERROR("Failed to start preinit\n");
125 if (preinit_proc.pid <= 0) {
126 ERROR("Failed to start new preinit instance\n");
129 uloop_process_add(&preinit_proc);
131 DEBUG(4, "Launched preinit instance, pid=%d\n", (int) preinit_proc.pid);