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	halt.c - ubase - suckless linux base utils
	git clone git://git.suckless.org/ubase
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	---
	halt.c (748B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/syscall.h>
	3
	4 #include <stdio.h>
	5 #include <stdlib.h>
	6 #include <unistd.h>
	7
	8 #include "reboot.h"
	9 #include "util.h"
	10
	11 static void
	12 usage(void)
	13 {
	14 eprintf("usage: %s [-pr]\n", argv0);
	15 }
	16
	17 int
	18 main(int argc, char *argv[])
	19 {
	20 int pflag = 0, rflag = 0;
	21 int cmd = LINUX_REBOOT_CMD_HALT;
	22
	23 ARGBEGIN {
	24 case 'p':
	25 pflag = 1;
	26 break;
	27 case 'r':
	28 rflag = 1;
	29 break;
	30 default:
	31 usage();
	32 } ARGEND;
	33
	34 if (argc > 0)
	35 usage();
	36
	37 sync();
	38
	39 if (pflag && rflag)
	40 usage();
	41
	42 if (pflag)
	43 cmd = LINUX_REBOOT_CMD_POWER_OFF;
	44 if (rflag)
	45 cmd = LINUX_REBOOT_CMD_RESTART;
	46
	47 if (syscall(__NR_reboot, LINUX_REBOOT_MAGIC1,
	48 LINUX_REBOOT_MAGIC2, cmd, NULL) < 0)
	49 eprintf("reboot:");
	50 return 0;
	51 }