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