Contents of /tags/mkinitrd-6_1_5/busybox/init/mesg.c
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Wed Aug 5 17:52:52 2009 UTC (14 years, 10 months ago) by niro
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Wed Aug 5 17:52:52 2009 UTC (14 years, 10 months ago) by niro
File MIME type: text/plain
File size: 1038 byte(s)
tagged 'mkinitrd-6_1_5'
| 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * mesg implementation for busybox |
| 4 | * |
| 5 | * Copyright (c) 2002 Manuel Novoa III <mjn3@codepoet.org> |
| 6 | * |
| 7 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
| 8 | */ |
| 9 | |
| 10 | #include "libbb.h" |
| 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 | |
| 18 | int mesg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 19 | int mesg_main(int argc, char **argv) |
| 20 | { |
| 21 | struct stat sb; |
| 22 | const char *tty; |
| 23 | char c = 0; |
| 24 | |
| 25 | if (--argc == 0 |
| 26 | || (argc == 1 && ((c = **++argv) == 'y' || c == 'n')) |
| 27 | ) { |
| 28 | tty = ttyname(STDERR_FILENO); |
| 29 | if (tty == NULL) { |
| 30 | tty = "ttyname"; |
| 31 | } else if (stat(tty, &sb) == 0) { |
| 32 | mode_t m; |
| 33 | if (argc == 0) { |
| 34 | puts((sb.st_mode & (S_IWGRP|S_IWOTH)) ? "is y" : "is n"); |
| 35 | return EXIT_SUCCESS; |
| 36 | } |
| 37 | m = (c == 'y') ? sb.st_mode | S_IWGRP_OR_S_IWOTH |
| 38 | : sb.st_mode & ~(S_IWGRP|S_IWOTH); |
| 39 | if (chmod(tty, m) == 0) { |
| 40 | return EXIT_SUCCESS; |
| 41 | } |
| 42 | } |
| 43 | bb_simple_perror_msg_and_die(tty); |
| 44 | } |
| 45 | bb_show_usage(); |
| 46 | } |