| 1 | /* |
| 2 | * Copyright (c) 1984 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #if defined(LIBC_SCCS) && !defined(lint) |
| 8 | static char sccsid[] = "@(#)ttyslot.c 5.2 (Berkeley) %G%"; |
| 9 | #endif LIBC_SCCS and not lint |
| 10 | |
| 11 | /* |
| 12 | * Return the number of the slot in the utmp file |
| 13 | * corresponding to the current user: try for file 0, 1, 2. |
| 14 | * Definition is the line number in the /etc/ttys file. |
| 15 | */ |
| 16 | #include <ttyent.h> |
| 17 | |
| 18 | char *ttyname(); |
| 19 | char *rindex(); |
| 20 | |
| 21 | #define NULL 0 |
| 22 | |
| 23 | ttyslot() |
| 24 | { |
| 25 | register struct ttyent *ty; |
| 26 | register char *tp, *p; |
| 27 | register s; |
| 28 | |
| 29 | if ((tp = ttyname(0)) == NULL && |
| 30 | (tp = ttyname(1)) == NULL && |
| 31 | (tp = ttyname(2)) == NULL) |
| 32 | return(0); |
| 33 | if ((p = rindex(tp, '/')) == NULL) |
| 34 | p = tp; |
| 35 | else |
| 36 | p++; |
| 37 | setttyent(); |
| 38 | s = 0; |
| 39 | while ((ty = getttyent()) != NULL) { |
| 40 | s++; |
| 41 | if (strcmp(ty->ty_name, p) == 0) { |
| 42 | endttyent(); |
| 43 | return (s); |
| 44 | } |
| 45 | } |
| 46 | endttyent(); |
| 47 | return (0); |
| 48 | } |