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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/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include "init.h"
static void
early_dev(void)
{
mkdev("*", 0600);
mknod("/dev/null", 0666, makedev(1, 3));
}
static void
early_console(const char *dev)
{
struct stat s;
int dd;
if (stat(dev, &s)) {
ERROR("Failed to stat %s\n", dev);
return;
}
dd = open(dev, O_RDWR);
if (dd < 0)
dd = open("/dev/null", O_RDWR);
dup2(dd, STDIN_FILENO);
dup2(dd, STDOUT_FILENO);
dup2(dd, STDERR_FILENO);
if (dd != STDIN_FILENO &&
dd != STDOUT_FILENO &&
dd != STDERR_FILENO)
close(dd);
fcntl(STDERR_FILENO, F_SETFL, fcntl(STDERR_FILENO, F_GETFL) | O_NONBLOCK);
}
static void
early_mounts(void)
{
unsigned int oldumask = umask(0);
mount("proc", "/proc", "proc", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, 0);
mount("sysfs", "/sys", "sysfs", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, 0);
mount("cgroup", "/sys/fs/cgroup", "cgroup", MS_NODEV | MS_NOEXEC | MS_NOSUID, 0);
mount("tmpfs", "/dev", "tmpfs", MS_NOATIME | MS_NOSUID, "mode=0755,size=512K");
symlink("/tmp/shm", "/dev/shm");
mkdir("/dev/pts", 0755);
mount("devpts", "/dev/pts", "devpts", MS_NOATIME | MS_NOEXEC | MS_NOSUID, "mode=600");
early_dev();
early_console("/dev/console");
if (mount_zram_on_tmp()) {
mount("tmpfs", "/tmp", "tmpfs", MS_NOSUID | MS_NODEV | MS_NOATIME, 0);
mkdir("/tmp/shm", 01777);
} else {
mkdir("/tmp/shm", 01777);
mount("tmpfs", "/tmp/shm", "tmpfs", MS_NOSUID | MS_NODEV | MS_NOATIME,
"mode=01777");
}
mkdir("/tmp/run", 0777);
mkdir("/tmp/lock", 0777);
mkdir("/tmp/state", 0777);
umask(oldumask);
}
static void
early_env(void)
{
setenv("PATH", "/bin:/sbin:/usr/bin:/usr/sbin", 1);
}
void
early(void)
{
if (getpid() != 1)
return;
early_mounts();
early_env();
LOG("Console is alive\n");
}
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