projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| d97d0c53 BJ |
1 | static char *sccsid = "@(#)lock.c 4.1 (Berkeley) %G%"; |
| 2 | #include <stdio.h> | |
| 3 | #include <sys/types.h> | |
| 4 | #include <stat.h> | |
| 5 | #include <signal.h> | |
| 6 | #include <sgtty.h> | |
| 7 | ||
| 8 | /* | |
| 9 | * Lock a terminal up until the knowledgeable Joe returns. | |
| 10 | */ | |
| 11 | char masterp[] = "hasta la vista\n"; | |
| 12 | struct sgttyb tty, ntty; | |
| 13 | char s[BUFSIZ], s1[BUFSIZ]; | |
| 14 | ||
| 15 | main(argc, argv) | |
| 16 | char **argv; | |
| 17 | { | |
| 18 | register int t; | |
| 19 | struct stat statb; | |
| 20 | ||
| 21 | for (t = 1; t <= 16; t++) | |
| 22 | if (t != SIGHUP) | |
| 23 | signal(t, SIG_IGN); | |
| 24 | if (argc > 0) | |
| 25 | argv[0] = 0; | |
| 26 | if (gtty(0, &tty)) | |
| 27 | exit(1); | |
| 28 | ntty = tty; ntty.sg_flags &= ~ECHO; | |
| 29 | stty(0, &ntty); | |
| 30 | printf("Key: "); | |
| 31 | fgets(s, sizeof s, stdin); | |
| 32 | printf("\nAgain: "); | |
| 33 | fgets(s1, sizeof s1, stdin); | |
| 34 | putchar('\n'); | |
| 35 | if (strcmp(s1, s)) { | |
| 36 | putchar(07); | |
| 37 | stty(0, &tty); | |
| 38 | exit(1); | |
| 39 | } | |
| 40 | s[0] = 0; | |
| 41 | for (;;) { | |
| 42 | fgets(s, sizeof s, stdin); | |
| 43 | if (strcmp(s1, s) == 0) | |
| 44 | break; | |
| 45 | if (strcmp(s, masterp) == 0) | |
| 46 | break; | |
| 47 | putchar(07); | |
| 48 | if (gtty(0, &ntty)) | |
| 49 | exit(1); | |
| 50 | } | |
| 51 | stty(0, &tty); | |
| 52 | } |