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.
17 #include <sys/types.h>
18 #include <sys/mount.h>
21 #include <libubox/uloop.h>
22 #include <libubox/utils.h>
30 #include "../watchdog.h"
31 #include "../sysupgrade.h"
33 static struct uloop_process preinit_proc;
34 static struct uloop_process plugd_proc;
39 FILE *fp = fopen("/tmp/debug_level", "r");
44 if (fscanf(fp, "%d", &lvl) == EOF)
45 ERROR("failed to read debug level: %m\n");
47 unlink("/tmp/debug_level");
49 if (lvl > 0 && lvl < 5)
54 check_sysupgrade(void)
56 char *prefix = NULL, *path = NULL, *command = NULL;
62 FILE *sysupgrade = fopen("/tmp/sysupgrade", "r");
67 if (getdelim(&prefix, &n, 0, sysupgrade) < 0)
70 if (getdelim(&path, &n, 0, sysupgrade) < 0)
73 if (getdelim(&command, &n, 0, sysupgrade) < 0)
78 sysupgrade_exec_upgraded(prefix, path, NULL, command, NULL);
91 spawn_procd(struct uloop_process *proc, int ret)
93 char *wdt_fd = watchdog_fd();
94 char *argv[] = { "/sbin/procd", NULL};
97 if (plugd_proc.pid > 0)
98 kill(plugd_proc.pid, SIGKILL);
100 unsetenv("INITRAMFS");
102 unlink("/tmp/.preinit");
106 DEBUG(2, "Exec to real procd now\n");
108 setenv("WDTFD", wdt_fd, 1);
111 snprintf(dbg, 2, "%d", debug);
112 setenv("DBGLVL", dbg, 1);
115 execvp(argv[0], argv);
119 plugd_proc_cb(struct uloop_process *proc, int ret)
127 char *init[] = { "/bin/sh", "/etc/preinit", NULL };
128 char *plug[] = { "/sbin/procd", "-h", "/etc/hotplug-preinit.json", NULL };
131 LOG("- preinit -\n");
133 plugd_proc.cb = plugd_proc_cb;
134 plugd_proc.pid = fork();
135 if (!plugd_proc.pid) {
136 execvp(plug[0], plug);
137 ERROR("Failed to start plugd: %m\n");
140 if (plugd_proc.pid <= 0) {
141 ERROR("Failed to start new plugd instance: %m\n");
144 uloop_process_add(&plugd_proc);
146 setenv("PREINIT", "1", 1);
148 fd = creat("/tmp/.preinit", 0600);
151 ERROR("Failed to create sentinel file: %m\n");
155 preinit_proc.cb = spawn_procd;
156 preinit_proc.pid = fork();
157 if (!preinit_proc.pid) {
158 execvp(init[0], init);
159 ERROR("Failed to start preinit: %m\n");
162 if (preinit_proc.pid <= 0) {
163 ERROR("Failed to start new preinit instance: %m\n");
166 uloop_process_add(&preinit_proc);
168 DEBUG(4, "Launched preinit instance, pid=%d\n", (int) preinit_proc.pid);