279 lines
6.5 KiB
C
279 lines
6.5 KiB
C
/* $OpenBSD: reboot.c,v 1.38 2017/08/22 00:30:16 sf Exp $ */
|
|
/* $NetBSD: reboot.c,v 1.8 1995/10/05 05:36:22 mycroft Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1980, 1986, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/reboot.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/time.h>
|
|
#include <sys/wait.h>
|
|
#include <machine/cpu.h>
|
|
#include <signal.h>
|
|
#include <pwd.h>
|
|
#include <errno.h>
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <termios.h>
|
|
#include <syslog.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <paths.h>
|
|
#include <util.h>
|
|
|
|
void usage(void);
|
|
extern char *__progname;
|
|
|
|
int dohalt;
|
|
|
|
#define _PATH_RC "/etc/rc"
|
|
|
|
static void
|
|
sleep_while_procs(int seconds)
|
|
{
|
|
while (seconds > 0) {
|
|
if (kill(-1, 0) == -1 && errno == ESRCH)
|
|
return;
|
|
sleep(1);
|
|
seconds--;
|
|
}
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
unsigned int i;
|
|
struct passwd *pw;
|
|
int ch, howto, lflag, nflag, pflag, qflag;
|
|
char *p, *user;
|
|
sigset_t mask;
|
|
|
|
p = __progname;
|
|
|
|
/* Nuke login shell */
|
|
if (*p == '-')
|
|
p++;
|
|
|
|
howto = dohalt = lflag = nflag = pflag = qflag = 0;
|
|
if (!strcmp(p, "halt")) {
|
|
dohalt = 1;
|
|
howto = RB_HALT;
|
|
}
|
|
|
|
while ((ch = getopt(argc, argv, "dlnpq")) != -1)
|
|
switch (ch) {
|
|
case 'd':
|
|
howto |= RB_DUMP;
|
|
break;
|
|
case 'l': /* Undocumented; used by shutdown. */
|
|
lflag = 1;
|
|
break;
|
|
case 'n':
|
|
nflag = 1;
|
|
howto |= RB_NOSYNC;
|
|
break;
|
|
case 'p':
|
|
/* Only works if we're called as halt. */
|
|
if (dohalt) {
|
|
pflag = 1;
|
|
howto |= RB_POWERDOWN;
|
|
}
|
|
break;
|
|
case 'q':
|
|
qflag = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc)
|
|
usage();
|
|
|
|
if (geteuid())
|
|
errx(1, "%s", strerror(EPERM));
|
|
|
|
#ifdef CPU_LIDACTION
|
|
if (howto & RB_POWERDOWN) {
|
|
/* Disable suspending on laptop lid close */
|
|
int mib[] = {CTL_MACHDEP, CPU_LIDACTION};
|
|
int lidaction = 0;
|
|
|
|
if (sysctl(mib, 2, NULL, NULL, &lidaction,
|
|
sizeof(lidaction)) == -1 && errno != EOPNOTSUPP)
|
|
warn("sysctl");
|
|
}
|
|
#endif /* CPU_LIDACTION */
|
|
|
|
if (qflag) {
|
|
reboot(howto);
|
|
err(1, "reboot");
|
|
}
|
|
|
|
/* Log the reboot. */
|
|
if (!lflag) {
|
|
if ((user = getlogin()) == NULL)
|
|
user = (pw = getpwuid(getuid())) ?
|
|
pw->pw_name : "???";
|
|
if (dohalt) {
|
|
openlog("halt", 0, LOG_AUTH | LOG_CONS);
|
|
if (pflag) {
|
|
syslog(LOG_CRIT,
|
|
"halted (with powerdown) by %s", user);
|
|
} else {
|
|
syslog(LOG_CRIT, "halted by %s", user);
|
|
}
|
|
} else {
|
|
openlog("reboot", 0, LOG_AUTH | LOG_CONS);
|
|
syslog(LOG_CRIT, "rebooted by %s", user);
|
|
}
|
|
}
|
|
logwtmp("~", "shutdown", "");
|
|
|
|
/*
|
|
* Do a sync early on, so disks start transfers while we're off
|
|
* killing processes. Don't worry about writes done before the
|
|
* processes die, the reboot system call syncs the disks.
|
|
*/
|
|
if (!nflag)
|
|
sync();
|
|
|
|
/* Just stop init -- if we fail, we'll restart it. */
|
|
if (kill(1, SIGTSTP) == -1)
|
|
err(1, "SIGTSTP init");
|
|
|
|
/* Ignore the SIGHUP we get when our parent shell dies. */
|
|
(void)signal(SIGHUP, SIG_IGN);
|
|
|
|
/*
|
|
* If we're running in a pipeline, we don't want to die
|
|
* after killing whatever we're writing to.
|
|
*/
|
|
(void)signal(SIGPIPE, SIG_IGN);
|
|
|
|
if (access(_PATH_RC, R_OK) != -1) {
|
|
pid_t pid;
|
|
struct termios t;
|
|
int fd, status;
|
|
|
|
switch ((pid = fork())) {
|
|
case -1:
|
|
break;
|
|
case 0:
|
|
if (revoke(_PATH_CONSOLE) == -1)
|
|
warn("revoke");
|
|
if (setsid() == -1)
|
|
warn("setsid");
|
|
fd = open(_PATH_CONSOLE, O_RDWR);
|
|
if (fd == -1)
|
|
warn("open");
|
|
dup2(fd, 0);
|
|
dup2(fd, 1);
|
|
dup2(fd, 2);
|
|
if (fd > 2)
|
|
close(fd);
|
|
|
|
/* At a minimum... */
|
|
tcgetattr(0, &t);
|
|
t.c_oflag |= (ONLCR | OPOST);
|
|
tcsetattr(0, TCSANOW, &t);
|
|
|
|
execl(_PATH_BSHELL, "sh", _PATH_RC, "shutdown", (char *)NULL);
|
|
_exit(1);
|
|
default:
|
|
/* rc exits 2 if powerdown=YES in rc.shutdown */
|
|
waitpid(pid, &status, 0);
|
|
if (dohalt && WIFEXITED(status) && WEXITSTATUS(status) == 2)
|
|
howto |= RB_POWERDOWN;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Point of no return, block all signals so we are sure to
|
|
* reach the call to reboot(2) unmolested.
|
|
*/
|
|
sigfillset(&mask);
|
|
sigprocmask(SIG_BLOCK, &mask, NULL);
|
|
|
|
/* Send a SIGTERM first, a chance to save the buffers. */
|
|
if (kill(-1, SIGTERM) == -1) {
|
|
/*
|
|
* If ESRCH, everything's OK: we're the only non-system
|
|
* process! That can happen e.g. via 'exec reboot' in
|
|
* single-user mode.
|
|
*/
|
|
if (errno != ESRCH) {
|
|
warn("SIGTERM processes");
|
|
goto restart;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* After the processes receive the signal, start the rest of the
|
|
* buffers on their way. Wait 5 seconds between the SIGTERM and
|
|
* the SIGKILL to give everybody a chance.
|
|
*/
|
|
sleep_while_procs(2);
|
|
if (!nflag)
|
|
sync();
|
|
sleep_while_procs(3);
|
|
|
|
for (i = 1;; ++i) {
|
|
if (kill(-1, SIGKILL) == -1) {
|
|
if (errno == ESRCH)
|
|
break;
|
|
goto restart;
|
|
}
|
|
if (i > 5) {
|
|
warnx("WARNING: some process(es) wouldn't die");
|
|
break;
|
|
}
|
|
sleep_while_procs(2 * i);
|
|
}
|
|
|
|
reboot(howto);
|
|
/* FALLTHROUGH */
|
|
|
|
restart:
|
|
errx(1, kill(1, SIGHUP) == -1 ? "(can't restart init): " : "");
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: %s [-dn%sq]\n", __progname,
|
|
dohalt ? "p" : "");
|
|
exit(1);
|
|
}
|