|
|
1.1 root 1: static char *sccsid = "@(#)halt.c 4.2 (Berkeley) 11/10/80";
2: /*
3: * Halt
4: */
5: #include <stdio.h>
6: #include <sys/reboot.h>
7:
8: main(argc, argv)
9: int argc;
10: char **argv;
11: {
12: int howto;
13: char *ttyn = (char *)ttyname(2);
14:
15: howto = RB_HALT;
16: argc--, argv++;
17: while (argc > 0) {
18: if (!strcmp(*argv, "-n"))
19: howto |= RB_NOSYNC;
20: else if (!strcmp(*argv, "-y"))
21: ttyn = 0;
22: else {
23: fprintf(stderr, "usage: halt [ -n ]\n");
24: exit(1);
25: }
26: argc--, argv++;
27: }
28: if (ttyn && *(ttyn+strlen("/dev/tty")) == 'd') {
29: fprintf(stderr, "halt: dangerous on a dialup; use ``halt -y'' if you are really sure\n");
30: exit(1);
31: }
32: syscall(55, howto);
33: perror("reboot");
34: }
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