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"
30 #include "../sysupgrade.h"
32 static struct uloop_process preinit_proc;
33 static struct uloop_process plugd_proc;
38 FILE *fp = fopen("/tmp/debug_level", "r");
43 if (fscanf(fp, "%d", &lvl) == EOF)
44 ERROR("failed to read debug level\n");
46 unlink("/tmp/debug_level");
48 if (lvl > 0 && lvl < 5)
53 check_sysupgrade(void)
55 char *prefix = NULL, *path = NULL, *command = NULL;
61 FILE *sysupgrade = fopen("/tmp/sysupgrade", "r");
66 if (getdelim(&prefix, &n, 0, sysupgrade) < 0)
69 if (getdelim(&path, &n, 0, sysupgrade) < 0)
72 if (getdelim(&command, &n, 0, sysupgrade) < 0)
77 sysupgrade_exec_upgraded(prefix, path, command);
90 spawn_procd(struct uloop_process *proc, int ret)
92 char *wdt_fd = watchdog_fd();
93 char *argv[] = { "/sbin/procd", NULL};
96 if (plugd_proc.pid > 0)
97 kill(plugd_proc.pid, SIGKILL);
99 unsetenv("INITRAMFS");
101 unlink("/tmp/.preinit");
105 DEBUG(2, "Exec to real procd now\n");
107 setenv("WDTFD", wdt_fd, 1);
110 snprintf(dbg, 2, "%d", debug);
111 setenv("DBGLVL", dbg, 1);
114 execvp(argv[0], argv);
118 plugd_proc_cb(struct uloop_process *proc, int ret)
126 char *init[] = { "/bin/sh", "/etc/preinit", NULL };
127 char *plug[] = { "/sbin/procd", "-h", "/etc/hotplug-preinit.json", NULL };
130 LOG("- preinit -\n");
132 plugd_proc.cb = plugd_proc_cb;
133 plugd_proc.pid = fork();
134 if (!plugd_proc.pid) {
135 execvp(plug[0], plug);
136 ERROR("Failed to start plugd\n");
139 if (plugd_proc.pid <= 0) {
140 ERROR("Failed to start new plugd instance\n");
143 uloop_process_add(&plugd_proc);
145 setenv("PREINIT", "1", 1);
147 fd = creat("/tmp/.preinit", 0600);
150 ERROR("Failed to create sentinel file\n");
154 preinit_proc.cb = spawn_procd;
155 preinit_proc.pid = fork();
156 if (!preinit_proc.pid) {
157 execvp(init[0], init);
158 ERROR("Failed to start preinit\n");
161 if (preinit_proc.pid <= 0) {
162 ERROR("Failed to start new preinit instance\n");
165 uloop_process_add(&preinit_proc);
167 DEBUG(4, "Launched preinit instance, pid=%d\n", (int) preinit_proc.pid);