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/*
* openrc-shutdown.c
* If you are using OpenRC's provided init, this will shut down or
* reboot your system.
*
* This is based on code written by James Hammons <jlhamm@acm.org>, so
* I would like to publically thank him for his work.
*/
/*
* Copyright 2017 The OpenRC Authors.
* See the Authors file at the top-level directory of this distribution and
* https://github.com/OpenRC/openrc/blob/master/AUTHORS
*
* This file is part of OpenRC. It is subject to the license terms in
* the LICENSE file found in the top-level directory of this
* distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
* This file may not be copied, modified, propagated, or distributed
* except according to the terms contained in the LICENSE file.
*/
#include <getopt.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include "einfo.h"
#include "rc.h"
#include "helpers.h"
#include "_usage.h"
#include "rc-wtmp.h"
const char *applet = NULL;
const char *extraopts = NULL;
const char *getoptstring = "dDHKpRrsw" getoptstring_COMMON;
const struct option longopts[] = {
{ "no-write", no_argument, NULL, 'd'},
{ "dry-run", no_argument, NULL, 'D'},
{ "halt", no_argument, NULL, 'H'},
{ "kexec", no_argument, NULL, 'K'},
{ "poweroff", no_argument, NULL, 'p'},
{ "reexec", no_argument, NULL, 'R'},
{ "reboot", no_argument, NULL, 'r'},
{ "single", no_argument, NULL, 's'},
{ "write-only", no_argument, NULL, 'w'},
longopts_COMMON
};
const char * const longopts_help[] = {
"do not write wtmp record",
"print actions instead of executing them",
"halt the system",
"reboot the system using kexec",
"power off the system",
"re-execute init (use after upgrading)",
"reboot the system",
"single user mode",
"write wtmp boot record and exit",
longopts_help_COMMON
};
const char *usagestring = NULL;
const char *exclusive = "Select one of "
"--halt, --kexec, --poweroff, --reexec, --reboot, --single or --write-only";
static bool do_dryrun = false;
static bool do_halt = false;
static bool do_kexec = false;
static bool do_poweroff = false;
static bool do_reboot = false;
static bool do_reexec = false;
static bool do_single = false;
static bool do_wtmp = true;
static bool do_wtmp_only = false;
static void send_cmd(const char *cmd)
{
FILE *fifo;
size_t ignored;
if (do_dryrun) {
einfo("Would send %s to init", cmd);
return;
}
if (do_wtmp && (do_halt || do_kexec || do_reboot || do_poweroff))
log_wtmp("shutdown", "~~", 0, RUN_LVL, "~~");
fifo = fopen(RC_INIT_FIFO, "w");
if (!fifo) {
perror("fopen");
return;
}
ignored = fwrite(cmd, 1, strlen(cmd), fifo);
if (ignored != strlen(cmd))
printf("Error writing to init fifo\n");
fclose(fifo);
}
int main(int argc, char **argv)
{
int opt;
int cmd_count = 0;
applet = basename_c(argv[0]);
while ((opt = getopt_long(argc, argv, getoptstring,
longopts, (int *) 0)) != -1)
{
switch (opt) {
case 'd':
do_wtmp = false;
break;
case 'D':
do_dryrun = true;
break;
case 'H':
do_halt = true;
cmd_count++;
break;
case 'K':
do_kexec = true;
cmd_count++;
break;
case 'p':
do_poweroff = true;
cmd_count++;
break;
case 'R':
do_reexec = true;
cmd_count++;
break;
case 'r':
do_reboot = true;
cmd_count++;
break;
case 's':
do_single = true;
cmd_count++;
break;
case 'w':
do_wtmp_only = true;
cmd_count++;
break;
case_RC_COMMON_GETOPT
}
}
if (geteuid() != 0 && ! do_dryrun)
eerrorx("%s: you must be root\n", applet);
if (cmd_count != 1) {
eerror("%s: %s\n", applet, exclusive);
usage(EXIT_FAILURE);
}
if (do_halt)
send_cmd("halt");
else if (do_kexec)
send_cmd("kexec");
else if (do_poweroff)
send_cmd("poweroff");
else if (do_reboot)
send_cmd("reboot");
else if (do_reexec)
send_cmd("reexec");
else if (do_wtmp_only)
log_wtmp("shutdown", "~~", 0, RUN_LVL, "~~");
else if (do_single)
send_cmd("single");
return 0;
}
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