Bernhard Reutner-Fischer | e039e68 | 2009-10-26 23:29:03 +0100 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * wall - write a message to all logged-in users |
| 4 | * Copyright (c) 2009 Bernhard Reutner-Fischer |
| 5 | * |
| 6 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| 7 | */ |
| 8 | |
| 9 | #include "libbb.h" |
| 10 | #include <utmp.h> |
| 11 | |
| 12 | int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 13 | int wall_main(int argc UNUSED_PARAM, char **argv) |
| 14 | { |
| 15 | struct utmp *ut; |
| 16 | char *msg; |
| 17 | int fd = argv[1] ? xopen(argv[1], O_RDONLY) : STDIN_FILENO; |
| 18 | |
| 19 | msg = xmalloc_read(fd, NULL); |
| 20 | if (ENABLE_FEATURE_CLEAN_UP && argv[1]) |
| 21 | close(fd); |
| 22 | setutent(); |
| 23 | while ((ut = getutent()) != NULL) { |
| 24 | char *line; |
| 25 | if (ut->ut_type != USER_PROCESS) |
| 26 | continue; |
| 27 | line = concat_path_file("/dev", ut->ut_line); |
| 28 | xopen_xwrite_close(line, msg); |
| 29 | free(line); |
| 30 | } |
| 31 | if (ENABLE_FEATURE_CLEAN_UP) { |
| 32 | endutent(); |
| 33 | free(msg); |
| 34 | } |
| 35 | return EXIT_SUCCESS; |
| 36 | } |