mirror of
https://github.com/sheumann/hush.git
synced 2024-08-19 13:28:57 +00:00
126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Poweroff reboot and halt, oh my.
|
|
*
|
|
* Copyright 2006 by Rob Landley <rob@landley.net>
|
|
*
|
|
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
#include <sys/reboot.h>
|
|
|
|
#if ENABLE_FEATURE_WTMP
|
|
#include <sys/utsname.h>
|
|
#include <utmp.h>
|
|
|
|
static void write_wtmp(void)
|
|
{
|
|
struct utmp utmp;
|
|
struct utsname uts;
|
|
if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
|
|
close(creat(bb_path_wtmp_file, 0664));
|
|
}
|
|
memset(&utmp, 0, sizeof(utmp));
|
|
utmp.ut_tv.tv_sec = time(NULL);
|
|
safe_strncpy(utmp.ut_user, "shutdown", UT_NAMESIZE);
|
|
utmp.ut_type = RUN_LVL;
|
|
safe_strncpy(utmp.ut_id, "~~", sizeof(utmp.ut_id));
|
|
safe_strncpy(utmp.ut_line, "~~", UT_LINESIZE);
|
|
if (uname(&uts) == 0)
|
|
safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host));
|
|
updwtmp(bb_path_wtmp_file, &utmp);
|
|
|
|
}
|
|
#else
|
|
#define write_wtmp() ((void)0)
|
|
#endif
|
|
|
|
#ifndef RB_HALT_SYSTEM
|
|
#define RB_HALT_SYSTEM RB_HALT
|
|
#endif
|
|
|
|
#ifndef RB_POWERDOWN
|
|
/* Stop system and switch power off if possible. */
|
|
# define RB_POWERDOWN 0x4321fedc
|
|
#endif
|
|
#ifndef RB_POWER_OFF
|
|
# define RB_POWER_OFF RB_POWERDOWN
|
|
#endif
|
|
|
|
|
|
int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int halt_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
static const int magic[] = {
|
|
RB_HALT_SYSTEM,
|
|
RB_POWER_OFF,
|
|
RB_AUTOBOOT
|
|
};
|
|
static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
|
|
|
|
int delay = 0;
|
|
int which, flags, rc;
|
|
|
|
/* Figure out which applet we're running */
|
|
for (which = 0; "hpr"[which] != applet_name[0]; which++)
|
|
continue;
|
|
|
|
/* Parse and handle arguments */
|
|
opt_complementary = "d+"; /* -d N */
|
|
/* We support -w even if !ENABLE_FEATURE_WTMP,
|
|
* in order to not break scripts.
|
|
* -i (shut down network interfaces) is ignored.
|
|
*/
|
|
flags = getopt32(argv, "d:nfwi", &delay);
|
|
|
|
sleep(delay);
|
|
|
|
write_wtmp();
|
|
|
|
if (flags & 8) /* -w */
|
|
return EXIT_SUCCESS;
|
|
|
|
if (!(flags & 2)) /* no -n */
|
|
sync();
|
|
|
|
/* Perform action. */
|
|
rc = 1;
|
|
if (!(flags & 4)) { /* no -f */
|
|
//TODO: I tend to think that signalling linuxrc is wrong
|
|
// pity original author didn't comment on it...
|
|
if (ENABLE_FEATURE_INITRD) {
|
|
/* talk to linuxrc */
|
|
/* bbox init/linuxrc assumed */
|
|
pid_t *pidlist = find_pid_by_name("linuxrc");
|
|
if (pidlist[0] > 0)
|
|
rc = kill(pidlist[0], signals[which]);
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(pidlist);
|
|
}
|
|
if (rc) {
|
|
/* talk to init */
|
|
if (!ENABLE_FEATURE_CALL_TELINIT) {
|
|
/* bbox init assumed */
|
|
rc = kill(1, signals[which]);
|
|
} else {
|
|
/* SysV style init assumed */
|
|
/* runlevels:
|
|
* 0 == shutdown
|
|
* 6 == reboot */
|
|
rc = execlp(CONFIG_TELINIT_PATH,
|
|
CONFIG_TELINIT_PATH,
|
|
which == 2 ? "6" : "0",
|
|
(char *)NULL
|
|
);
|
|
}
|
|
}
|
|
} else {
|
|
rc = reboot(magic[which]);
|
|
}
|
|
|
|
if (rc)
|
|
bb_perror_nomsg_and_die();
|
|
return rc;
|
|
}
|