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/*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <libubox/uloop.h>
#include <libubox/utils.h>
#include <libubus.h>
#include <stdio.h>
#include <unistd.h>
#include "init.h"
#include "../watchdog.h"
static struct uloop_process preinit_proc;
static struct uloop_process plugd_proc;
static void
check_dbglvl(void)
{
FILE *fp = fopen("/tmp/debug_level", "r");
int lvl = 0;
if (!fp)
return;
if (fscanf(fp, "%d", &lvl) == EOF)
ERROR("failed to read debug level\n");
fclose(fp);
unlink("/tmp/debug_level");
if (lvl > 0 && lvl < 5)
debug = lvl;
}
static void
spawn_procd(struct uloop_process *proc, int ret)
{
char *wdt_fd = watchdog_fd();
char *argv[] = { "/sbin/procd", NULL};
struct stat s;
char dbg[2];
if (plugd_proc.pid > 0)
kill(plugd_proc.pid, SIGKILL);
if (!stat("/tmp/sysupgrade", &s))
while (true)
sleep(1);
unsetenv("INITRAMFS");
unsetenv("PREINIT");
DEBUG(2, "Exec to real procd now\n");
if (wdt_fd)
setenv("WDTFD", wdt_fd, 1);
check_dbglvl();
if (debug > 0) {
snprintf(dbg, 2, "%d", debug);
setenv("DBGLVL", dbg, 1);
}
execvp(argv[0], argv);
}
static void
plugd_proc_cb(struct uloop_process *proc, int ret)
{
proc->pid = 0;
}
void
preinit(void)
{
char *init[] = { "/bin/sh", "/etc/preinit", NULL };
char *plug[] = { "/sbin/procd", "-h", "/etc/hotplug-preinit.json", NULL };
LOG("- preinit -\n");
plugd_proc.cb = plugd_proc_cb;
plugd_proc.pid = fork();
if (!plugd_proc.pid) {
execvp(plug[0], plug);
ERROR("Failed to start plugd\n");
exit(-1);
}
if (plugd_proc.pid <= 0) {
ERROR("Failed to start new plugd instance\n");
return;
}
uloop_process_add(&plugd_proc);
setenv("PREINIT", "1", 1);
preinit_proc.cb = spawn_procd;
preinit_proc.pid = fork();
if (!preinit_proc.pid) {
execvp(init[0], init);
ERROR("Failed to start preinit\n");
exit(-1);
}
if (preinit_proc.pid <= 0) {
ERROR("Failed to start new preinit instance\n");
return;
}
uloop_process_add(&preinit_proc);
DEBUG(4, "Launched preinit instance, pid=%d\n", (int) preinit_proc.pid);
}
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