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/* SPDX-License-Identifier: ISC */
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
#include <errno.h>
#include <sys/reboot.h>
#include <linux/reboot.h>
#include "util.h"
#define FL_FORCE 0x01
#define FL_NOSYNC 0x02
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "poweroff", no_argument, NULL, 'p' },
{ "reboot", no_argument, NULL, 'r' },
{ "force", no_argument, NULL, 'f' },
{ "no-sync", no_argument, NULL, 'n' },
{ NULL, 0, NULL, 0 },
};
static const char *shortopt = "hprfn";
static const char *defact_str = "power-off";
static int defact = RB_POWER_OFF;
static NORETURN void usage(const char *progname, int status)
{
fprintf(status == EXIT_SUCCESS ? stdout : stderr,
"%s [OPTIONS...]\n\n"
"Perform a system shutdown or reboot.\n\n"
" -h, --help Display this help text and exit.\n"
" -V, --version Display version information and exit.\n"
" -p, --poweroff Power-off the machine.\n"
" -r, --reboot Reboot the machine.\n"
" -f, --force Force immediate power-off or reboot. Do not contact the\n"
" init system.\n"
" -n, --no-sync Don't sync storage media before power-off or reboot.\n\n"
"If no option is specified, the default action is %s.\n",
progname, defact_str);
exit(status);
}
int main(int argc, char **argv)
{
int c, ret, flags = 0;
char *ptr;
ptr = strrchr(argv[0], '/');
ptr = (ptr == NULL) ? argv[0] : (ptr + 1);
if (strcmp(ptr, "reboot") == 0) {
defact_str = "reboot";
defact = RB_AUTOBOOT;
}
while (1) {
c = getopt_long(argc, argv, shortopt, options, NULL);
if (c == -1)
break;
switch (c) {
case 'f':
flags |= FL_FORCE;
break;
case 'n':
flags |= FL_NOSYNC;
break;
case 'p':
defact = RB_POWER_OFF;
break;
case 'r':
defact = RB_AUTOBOOT;
break;
case 'h':
usage(ptr, EXIT_SUCCESS);
default:
usage(ptr, EXIT_FAILURE);
}
}
if (flags & FL_FORCE) {
if (!(flags & FL_NOSYNC))
sync();
reboot(defact);
perror("reboot system call");
return EXIT_FAILURE;
}
switch (defact) {
case RB_AUTOBOOT:
ret = kill(1, SIGINT);
break;
case RB_POWER_OFF:
ret = kill(1, SIGTERM);
break;
default:
return EXIT_SUCCESS;
}
if (ret) {
perror("sending signal to init");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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