Bernhard Reutner-Fischer | e15d757 | 2006-06-02 20:56:16 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 2 | /* |
Bernhard Reutner-Fischer | e15d757 | 2006-06-02 20:56:16 +0000 | [diff] [blame] | 3 | * mesg implementation for busybox |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 4 | * |
Bernhard Reutner-Fischer | e15d757 | 2006-06-02 20:56:16 +0000 | [diff] [blame] | 5 | * Copyright (c) 2002 Manuel Novoa III <mjn3@codepoet.org> |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 6 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame] | 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 10 | #include "libbb.h" |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 11 | |
| 12 | #ifdef USE_TTY_GROUP |
| 13 | #define S_IWGRP_OR_S_IWOTH S_IWGRP |
| 14 | #else |
| 15 | #define S_IWGRP_OR_S_IWOTH (S_IWGRP | S_IWOTH) |
| 16 | #endif |
| 17 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 18 | int mesg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denys Vlasenko | 2ec91ae | 2010-01-04 14:15:38 +0100 | [diff] [blame] | 19 | int mesg_main(int argc UNUSED_PARAM, char **argv) |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 20 | { |
| 21 | struct stat sb; |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 22 | const char *tty; |
Eric Andersen | 7850014 | 2004-08-27 19:55:28 +0000 | [diff] [blame] | 23 | char c = 0; |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 24 | |
Denys Vlasenko | 2ec91ae | 2010-01-04 14:15:38 +0100 | [diff] [blame] | 25 | argv++; |
| 26 | |
| 27 | if (!argv[0] |
| 28 | || (!argv[1] && ((c = argv[0][0]) == 'y' || c == 'n')) |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 29 | ) { |
Denis Vlasenko | 4e12b1a | 2008-12-23 23:36:47 +0000 | [diff] [blame] | 30 | tty = xmalloc_ttyname(STDERR_FILENO); |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 31 | if (tty == NULL) { |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 32 | tty = "ttyname"; |
| 33 | } else if (stat(tty, &sb) == 0) { |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 34 | mode_t m; |
Denys Vlasenko | 2ec91ae | 2010-01-04 14:15:38 +0100 | [diff] [blame] | 35 | if (c == 0) { |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 36 | puts((sb.st_mode & (S_IWGRP|S_IWOTH)) ? "is y" : "is n"); |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 37 | return EXIT_SUCCESS; |
| 38 | } |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 39 | m = (c == 'y') ? sb.st_mode | S_IWGRP_OR_S_IWOTH |
| 40 | : sb.st_mode & ~(S_IWGRP|S_IWOTH); |
| 41 | if (chmod(tty, m) == 0) { |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 42 | return EXIT_SUCCESS; |
| 43 | } |
| 44 | } |
Denis Vlasenko | 0c97c9d | 2007-10-01 11:58:38 +0000 | [diff] [blame] | 45 | bb_simple_perror_msg_and_die(tty); |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 46 | } |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 47 | bb_show_usage(); |
Glenn L McGrath | 061c900 | 2002-09-16 04:21:46 +0000 | [diff] [blame] | 48 | } |