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 if (fscanf(fp
, "%d", &lvl
) == EOF
)
42 ERROR("failed to read debug level\n");
44 unlink("/tmp/debug_level");
46 if (lvl
> 0 && lvl
< 5)
51 spawn_procd(struct uloop_process
*proc
, int ret
)
53 char *wdt_fd
= watchdog_fd();
54 char *argv
[] = { "/sbin/procd", NULL
};
58 if (plugd_proc
.pid
> 0)
59 kill(plugd_proc
.pid
, SIGKILL
);
61 if (!stat("/tmp/sysupgrade", &s
))
65 unsetenv("INITRAMFS");
67 DEBUG(2, "Exec to real procd now\n");
69 setenv("WDTFD", wdt_fd
, 1);
72 snprintf(dbg
, 2, "%d", debug
);
73 setenv("DBGLVL", dbg
, 1);
76 execvp(argv
[0], argv
);
80 plugd_proc_cb(struct uloop_process
*proc
, int ret
)
88 char *init
[] = { "/bin/sh", "/etc/preinit", NULL
};
89 char *plug
[] = { "/sbin/procd", "-h", "/etc/hotplug-preinit.json", NULL
};
93 plugd_proc
.cb
= plugd_proc_cb
;
94 plugd_proc
.pid
= fork();
95 if (!plugd_proc
.pid
) {
96 execvp(plug
[0], plug
);
97 ERROR("Failed to start plugd\n");
100 if (plugd_proc
.pid
<= 0) {
101 ERROR("Failed to start new plugd instance\n");
104 uloop_process_add(&plugd_proc
);
106 setenv("PREINIT", "1", 1);
108 preinit_proc
.cb
= spawn_procd
;
109 preinit_proc
.pid
= fork();
110 if (!preinit_proc
.pid
) {
111 execvp(init
[0], init
);
112 ERROR("Failed to start preinit\n");
115 if (preinit_proc
.pid
<= 0) {
116 ERROR("Failed to start new preinit instance\n");
119 uloop_process_add(&preinit_proc
);
121 DEBUG(4, "Launched preinit instance, pid=%d\n", (int) preinit_proc
.pid
);