| 1 | static char *sccsid = "@(#)lock.c 4.2 (Berkeley) %G%"; |
| 2 | #include <stdio.h> |
| 3 | #include <sys/types.h> |
| 4 | #include <sys/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 | |
| 22 | /* |
| 23 | * Ignore signals generated from tty keyboard. These signals |
| 24 | * are for xBSD only. This program should be compiled with |
| 25 | * the jobs library (cc ... -ljobs). |
| 26 | */ |
| 27 | sigset( SIGINT, SIG_IGN ); |
| 28 | sigset( SIGQUIT, SIG_IGN ); |
| 29 | sigset( SIGTSTP, SIG_IGN ); |
| 30 | |
| 31 | if (argc > 0) |
| 32 | argv[0] = 0; |
| 33 | if (gtty(0, &tty)) |
| 34 | exit(1); |
| 35 | ntty = tty; ntty.sg_flags &= ~ECHO; |
| 36 | stty(0, &ntty); |
| 37 | printf("Key: "); |
| 38 | fgets(s, sizeof s, stdin); |
| 39 | printf("\nAgain: "); |
| 40 | fgets(s1, sizeof s1, stdin); |
| 41 | putchar('\n'); |
| 42 | if (strcmp(s1, s)) { |
| 43 | putchar(07); |
| 44 | stty(0, &tty); |
| 45 | exit(1); |
| 46 | } |
| 47 | s[0] = 0; |
| 48 | for (;;) { |
| 49 | fgets(s, sizeof s, stdin); |
| 50 | if (strcmp(s1, s) == 0) |
| 51 | break; |
| 52 | if (strcmp(s, masterp) == 0) |
| 53 | break; |
| 54 | putchar(07); |
| 55 | if (gtty(0, &ntty)) |
| 56 | exit(1); |
| 57 | } |
| 58 | stty(0, &tty); |
| 59 | } |