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#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <sys/reboot.h>
#include <linux/reboot.h>
#include "telinit.h"
#include "util.h"
#define STRINIFY(x) #x
#define STRINIFY_VALUE(x) STRINIFY(x)
#define PROGRAM_NAME STRINIFY_VALUE(PROGNAME)
#define FL_FORCE 0x01
#define FL_NOSYNC 0x02
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ "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 = "hVprfn";
static const char *defact_str = "power-off";
static int defact = TI_SHUTDOWN;
static NORETURN void usage(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",
PROGRAM_NAME, defact_str);
exit(status);
}
static NORETURN void version(void)
{
fputs(
PROGRAM_NAME " (Pygos init) " PACKAGE_VERSION "\n"
"Copyright (C) 2018 David Oberhollenzer\n"
"License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n"
"This is free software: you are free to change and redistribute it.\n"
"There is NO WARRANTY, to the extent permitted by law.\n",
stdout);
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int c, fd, flags = 0;
ti_msg_t msg;
ssize_t ret;
if (!strcmp(PROGRAM_NAME, "reboot")) {
defact_str = "reboot";
defact = TI_REBOOT;
}
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 = TI_SHUTDOWN;
break;
case 'r':
defact = TI_REBOOT;
break;
case 'V':
version();
case 'h':
usage(EXIT_SUCCESS);
default:
exit(EXIT_FAILURE);
}
}
if (flags & FL_FORCE) {
if (!(flags & FL_NOSYNC))
sync();
switch (defact) {
case TI_REBOOT:
reboot(RB_AUTOBOOT);
break;
case TI_SHUTDOWN:
reboot(RB_POWER_OFF);
break;
}
perror("reboot system call");
return EXIT_FAILURE;
}
fd = opensock();
if (fd < 0)
return EXIT_FAILURE;
msg.type = defact;
retry:
ret = write(fd, &msg, sizeof(msg));
if (ret < 0) {
if (errno == EINTR)
goto retry;
perror("write on init socket");
close(fd);
return EXIT_FAILURE;
}
close(fd);
return EXIT_SUCCESS;
}
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