Commit | Line | Data |
---|---|---|
c27fc7dd KT |
1 | #include <stdio.h> |
2 | #include <utmp.h> | |
3 | #define USERS 50 | |
4 | ||
5 | char mesg[3000]; | |
6 | int msize; | |
7 | struct utmp utmp[USERS]; | |
8 | char *strcpy(); | |
9 | char *strcat(); | |
10 | ||
11 | main(argc, argv) | |
12 | char *argv[]; | |
13 | { | |
14 | register i; | |
15 | register struct utmp *p; | |
16 | FILE *f; | |
17 | ||
18 | if((f = fopen("/etc/utmp", "r")) == NULL) { | |
19 | fprintf(stderr, "Cannot open /etc/utmp\n"); | |
20 | exit(1); | |
21 | } | |
22 | fread((char *)utmp, sizeof(struct utmp), USERS, f); | |
23 | fclose(f); | |
24 | f = stdin; | |
25 | if(argc >= 2) { | |
26 | if((f = fopen(argv[1], "r")) == NULL) { | |
27 | fprintf(stderr,"Cannot open %s\n", argv[1]); | |
28 | exit(1); | |
29 | } | |
30 | } | |
31 | while((i = getc(f)) != EOF) mesg[msize++] = i; | |
32 | fclose(f); | |
33 | for(i=0; i<USERS; i++) { | |
34 | p = &utmp[i]; | |
35 | if(p->ut_name[0] == 0) | |
36 | continue; | |
37 | sleep(1); | |
38 | sendmes(p->ut_line); | |
39 | } | |
40 | exit(0); | |
41 | } | |
42 | ||
43 | sendmes(tty) | |
44 | char *tty; | |
45 | { | |
46 | register i; | |
47 | char t[50], buf[BUFSIZ]; | |
48 | FILE *f; | |
49 | ||
50 | i = fork(); | |
51 | if(i == -1) { | |
52 | fprintf(stderr, "Try again\n"); | |
53 | return; | |
54 | } | |
55 | if(i) | |
56 | return; | |
57 | strcpy(t, "/dev/"); | |
58 | strcat(t, tty); | |
59 | ||
60 | if((f = fopen(t, "w")) == NULL) { | |
61 | fprintf(stderr,"cannot open %s\n", t); | |
62 | exit(1); | |
63 | } | |
64 | setbuf(f, buf); | |
65 | fprintf(f, "\a\a\aBroadcast Message ...\n\n"); | |
66 | fwrite(mesg, msize, 1, f); | |
67 | exit(0); | |
68 | } |