Commit | Line | Data |
---|---|---|
4f509481 | 1 | static char *sccsid = "@(#)halt.c 4.7 (Berkeley) %G%"; |
a2588a32 BJ |
2 | /* |
3 | * Halt | |
4 | */ | |
5 | #include <stdio.h> | |
6 | #include <sys/reboot.h> | |
ccb2b0b8 BJ |
7 | #include <sys/types.h> |
8 | #include <time.h> | |
fe6cb666 BJ |
9 | #include <errno.h> |
10 | #include <signal.h> | |
a2588a32 | 11 | |
ccb2b0b8 BJ |
12 | #define SHUTDOWNLOG "/usr/adm/shutdownlog" |
13 | ||
a2588a32 BJ |
14 | main(argc, argv) |
15 | int argc; | |
16 | char **argv; | |
17 | { | |
18 | int howto; | |
037df60e | 19 | char *ttyn = (char *)ttyname(2); |
fe6cb666 | 20 | register i; |
821f38b7 | 21 | register qflag = 0; |
a2588a32 BJ |
22 | |
23 | howto = RB_HALT; | |
24 | argc--, argv++; | |
25 | while (argc > 0) { | |
26 | if (!strcmp(*argv, "-n")) | |
27 | howto |= RB_NOSYNC; | |
037df60e BJ |
28 | else if (!strcmp(*argv, "-y")) |
29 | ttyn = 0; | |
fe6cb666 BJ |
30 | else if (!strcmp(*argv, "-q")) |
31 | qflag++; | |
a2588a32 BJ |
32 | else { |
33 | fprintf(stderr, "usage: halt [ -n ]\n"); | |
34 | exit(1); | |
35 | } | |
36 | argc--, argv++; | |
37 | } | |
037df60e BJ |
38 | if (ttyn && *(ttyn+strlen("/dev/tty")) == 'd') { |
39 | fprintf(stderr, "halt: dangerous on a dialup; use ``halt -y'' if you are really sure\n"); | |
40 | exit(1); | |
41 | } | |
fe6cb666 | 42 | |
4f509481 | 43 | signal(SIGHUP, SIG_IGN); /* for network connections */ |
fe6cb666 BJ |
44 | if (kill(1, SIGTSTP) == -1) { |
45 | fprintf(stderr, "reboot: can't idle init\n"); | |
46 | exit(1); | |
47 | } | |
48 | ||
49 | if (!qflag) for (i = 1; ; i++) { | |
50 | if (kill(-1, SIGKILL) == -1) { | |
51 | extern int errno; | |
52 | ||
53 | if (errno == ESRCH) | |
54 | break; | |
55 | ||
56 | perror("reboot: kill"); | |
57 | kill(1, SIGHUP); | |
58 | exit(1); | |
59 | } | |
60 | if (i > 5) { | |
61 | fprintf(stderr, "CAUTION: some process(es) wouldn't die\n"); | |
62 | break; | |
63 | } | |
64 | setalarm(2 * i); | |
65 | pause(); | |
66 | } | |
67 | ||
ccb2b0b8 BJ |
68 | if ((howto & RB_NOSYNC) == 0) |
69 | log_entry(); | |
fe6cb666 BJ |
70 | if (!qflag) { |
71 | if ((howto & RB_NOSYNC)==0) { | |
72 | markdown(); | |
73 | sync(); | |
74 | sync(); | |
75 | } | |
76 | setalarm(5); | |
77 | pause(); | |
78 | } | |
a2588a32 BJ |
79 | syscall(55, howto); |
80 | perror("reboot"); | |
81 | } | |
fe6cb666 BJ |
82 | |
83 | dingdong() | |
84 | { | |
85 | /* RRRIIINNNGGG RRRIIINNNGGG */ | |
86 | } | |
87 | ||
88 | setalarm(n) | |
89 | { | |
90 | signal(SIGALRM, dingdong); | |
91 | alarm(n); | |
92 | } | |
93 | ||
94 | #include <utmp.h> | |
95 | #define SCPYN(a, b) strncpy(a, b, sizeof(a)) | |
96 | char wtmpf[] = "/usr/adm/wtmp"; | |
97 | struct utmp wtmp; | |
98 | ||
99 | markdown() | |
100 | { | |
101 | register f = open(wtmpf, 1); | |
102 | if (f >= 0) { | |
103 | lseek(f, 0L, 2); | |
104 | SCPYN(wtmp.ut_line, "~"); | |
105 | SCPYN(wtmp.ut_name, "shutdown"); | |
106 | time(&wtmp.ut_time); | |
107 | write(f, (char *)&wtmp, sizeof(wtmp)); | |
108 | close(f); | |
109 | } | |
110 | } | |
ccb2b0b8 BJ |
111 | |
112 | char *days[] = { | |
113 | "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" | |
114 | }; | |
115 | ||
116 | char *months[] = { | |
117 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", | |
118 | "Oct", "Nov", "Dec" | |
119 | }; | |
120 | ||
121 | log_entry() | |
122 | { | |
123 | FILE *fp; | |
124 | struct tm *tm, *localtime(); | |
125 | time_t now; | |
126 | ||
127 | time(&now); | |
128 | tm = localtime(&now); | |
129 | fp = fopen(SHUTDOWNLOG, "a"); | |
31b4d3e1 BJ |
130 | if (fp == NULL) |
131 | return; | |
ccb2b0b8 BJ |
132 | fseek(fp, 0L, 2); |
133 | fprintf(fp, "%02d:%02d %s %s %2d, %4d. Halted.\n", tm->tm_hour, | |
134 | tm->tm_min, days[tm->tm_wday], months[tm->tm_mon], | |
135 | tm->tm_mday, tm->tm_year + 1900); | |
136 | fclose(fp); | |
137 | } |