Commit | Line | Data |
---|---|---|
6c3e3718 TL |
1 | #include <stdio.h> |
2 | #include <utmp.h> | |
3 | #define USERS 50 | |
4 | ||
5 | char mesg[3000]; | |
6 | int msize,sline; | |
7 | struct utmp utmp[USERS]; | |
8 | char *strcpy(); | |
9 | char *strcat(); | |
10 | char who[9] = "???"; | |
11 | ||
12 | main(argc, argv) | |
13 | char *argv[]; | |
14 | { | |
15 | register i; | |
16 | register char c; | |
17 | register struct utmp *p; | |
18 | FILE *f; | |
19 | ||
20 | if((f = fopen("/etc/utmp", "r")) == NULL) { | |
21 | fprintf(stderr, "Cannot open /etc/utmp\n"); | |
22 | exit(1); | |
23 | } | |
24 | fread((char *)utmp, sizeof(struct utmp), USERS, f); | |
25 | fclose(f); | |
26 | f = stdin; | |
27 | if(argc >= 2) { | |
28 | /* take message from unix file instead of standard input */ | |
29 | if((f = fopen(argv[1], "r")) == NULL) { | |
30 | fprintf(stderr,"Cannot open %s\n", argv[1]); | |
31 | exit(1); | |
32 | } | |
33 | } | |
34 | while((i = getc(f)) != EOF) mesg[msize++] = i; | |
35 | fclose(f); | |
36 | sline = ttyslot(2); /* 'utmp' slot no. of sender */ | |
37 | if (sline) { | |
38 | for (i=0;c=utmp[sline].ut_name[i];i++) | |
39 | who[i]=c; | |
40 | who[i] = '\0'; /* sender initials */ | |
41 | } | |
42 | for(i=0; i<USERS; i++) { | |
43 | p = &utmp[i]; | |
44 | if(p->ut_name[0] == 0) | |
45 | continue; | |
46 | sleep(1); | |
47 | sendmes(p->ut_line); | |
48 | } | |
49 | exit(0); | |
50 | } | |
51 | ||
52 | sendmes(tty) | |
53 | char *tty; | |
54 | { | |
55 | register i; | |
56 | char t[50], buf[BUFSIZ]; | |
57 | FILE *f; | |
58 | ||
59 | i = fork(); | |
60 | if(i == -1) { | |
61 | fprintf(stderr, "Try again\n"); | |
62 | return; | |
63 | } | |
64 | if(i) | |
65 | return; | |
66 | strcpy(t, "/dev/"); | |
67 | strcat(t, tty); | |
68 | ||
69 | if((f = fopen(t, "w")) == NULL) { | |
70 | fprintf(stderr,"cannot open %s\n", t); | |
71 | exit(1); | |
72 | } | |
73 | setbuf(f, buf); | |
74 | fprintf(f, "\a\a\aBroadcast Message from %s (%s) ...\n\n",who, | |
75 | utmp[sline].ut_line); | |
76 | fwrite(mesg, msize, 1, f); | |
77 | exit(0); | |
78 | } |