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8a3f4fd4 | 1 | /* |
614e49dd KB |
2 | * Copyright (c) 1980, 1986 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
8a3f4fd4 DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
19 | char copyright[] = | |
614e49dd | 20 | "@(#) Copyright (c) 1980, 1986 The Regents of the University of California.\n\ |
8a3f4fd4 | 21 | All rights reserved.\n"; |
614e49dd | 22 | #endif /* not lint */ |
8a3f4fd4 | 23 | |
37c640e2 | 24 | #ifndef lint |
7abf8d65 | 25 | static char sccsid[] = "@(#)halt.c 5.6 (Berkeley) %G%"; |
614e49dd | 26 | #endif /* not lint */ |
37c640e2 | 27 | |
a2588a32 BJ |
28 | /* |
29 | * Halt | |
30 | */ | |
ccb2b0b8 | 31 | #include <sys/types.h> |
7abf8d65 | 32 | #include <sys/reboot.h> |
ce4fd43b | 33 | #include <sys/time.h> |
bd699e5d | 34 | #include <sys/syslog.h> |
7abf8d65 | 35 | #include <sys/signal.h> |
fe6cb666 | 36 | #include <errno.h> |
bd699e5d | 37 | #include <pwd.h> |
7abf8d65 KB |
38 | #include <stdio.h> |
39 | #include <paths.h> | |
ccb2b0b8 | 40 | |
a2588a32 BJ |
41 | main(argc, argv) |
42 | int argc; | |
43 | char **argv; | |
44 | { | |
614e49dd KB |
45 | register int i; |
46 | register int qflag = 0; | |
bd699e5d | 47 | struct passwd *pw, *getpwuid(); |
614e49dd KB |
48 | int ch, howto, needlog = 1; |
49 | char *user, *ttyn, *getlogin(), *ttyname(); | |
a2588a32 BJ |
50 | |
51 | howto = RB_HALT; | |
614e49dd KB |
52 | ttyn = ttyname(2); |
53 | while ((ch = getopt(argc, argv, "lnqy")) != EOF) | |
54 | switch((char)ch) { | |
55 | case 'l': /* undocumented; for shutdown(8) */ | |
56 | needlog = 0; | |
57 | break; | |
58 | case 'n': | |
a2588a32 | 59 | howto |= RB_NOSYNC; |
614e49dd KB |
60 | break; |
61 | case 'q': | |
fe6cb666 | 62 | qflag++; |
614e49dd KB |
63 | break; |
64 | case 'y': | |
65 | ttyn = 0; | |
66 | break; | |
67 | case '?': | |
68 | default: | |
69 | fprintf(stderr, "usage: halt [-nqy]\n"); | |
a2588a32 BJ |
70 | exit(1); |
71 | } | |
614e49dd | 72 | |
7abf8d65 | 73 | if (ttyn && ttyn[sizeof(_PATH_TTY) - 1] == 'd') { |
037df60e BJ |
74 | fprintf(stderr, "halt: dangerous on a dialup; use ``halt -y'' if you are really sure\n"); |
75 | exit(1); | |
76 | } | |
fe6cb666 | 77 | |
b0af3d20 | 78 | if (needlog) { |
614e49dd KB |
79 | openlog("halt", 0, LOG_AUTH); |
80 | if ((user = getlogin()) == NULL) | |
81 | if ((pw = getpwuid(getuid()))) | |
82 | user = pw->pw_name; | |
83 | else | |
84 | user = "???"; | |
b0af3d20 MK |
85 | syslog(LOG_CRIT, "halted by %s", user); |
86 | } | |
bd699e5d | 87 | |
4f509481 | 88 | signal(SIGHUP, SIG_IGN); /* for network connections */ |
fe6cb666 | 89 | if (kill(1, SIGTSTP) == -1) { |
614e49dd | 90 | fprintf(stderr, "halt: can't idle init\n"); |
fe6cb666 BJ |
91 | exit(1); |
92 | } | |
bd699e5d | 93 | sleep(1); |
b0af3d20 MK |
94 | (void) kill(-1, SIGTERM); /* one chance to catch it */ |
95 | sleep(5); | |
fe6cb666 BJ |
96 | |
97 | if (!qflag) for (i = 1; ; i++) { | |
98 | if (kill(-1, SIGKILL) == -1) { | |
99 | extern int errno; | |
100 | ||
101 | if (errno == ESRCH) | |
102 | break; | |
103 | ||
614e49dd | 104 | perror("halt: kill"); |
fe6cb666 BJ |
105 | kill(1, SIGHUP); |
106 | exit(1); | |
107 | } | |
108 | if (i > 5) { | |
bd699e5d MK |
109 | fprintf(stderr, |
110 | "CAUTION: some process(es) wouldn't die\n"); | |
fe6cb666 BJ |
111 | break; |
112 | } | |
113 | setalarm(2 * i); | |
114 | pause(); | |
115 | } | |
116 | ||
bd699e5d | 117 | if (!qflag && (howto & RB_NOSYNC) == 0) { |
614e49dd | 118 | logwtmp("~", "shutdown", ""); |
bd699e5d | 119 | sync(); |
fe6cb666 BJ |
120 | setalarm(5); |
121 | pause(); | |
122 | } | |
a2588a32 | 123 | syscall(55, howto); |
614e49dd | 124 | perror("halt"); |
a2588a32 | 125 | } |
fe6cb666 BJ |
126 | |
127 | dingdong() | |
128 | { | |
129 | /* RRRIIINNNGGG RRRIIINNNGGG */ | |
130 | } | |
131 | ||
132 | setalarm(n) | |
133 | { | |
134 | signal(SIGALRM, dingdong); | |
135 | alarm(n); | |
136 | } |