source: branches/3.2/mindi-busybox/miscutils/wall.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
  • Property svn:eol-style set to native
File size: 1.0 KB
Line 
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 source tree.
7 */
8
9//usage:#define wall_trivial_usage
10//usage:    "[FILE]"
11//usage:#define wall_full_usage "\n\n"
12//usage:    "Write content of FILE or stdin to all logged-in users"
13//usage:
14//usage:#define wall_sample_usage
15//usage:    "echo foo | wall\n"
16//usage:    "wall ./mymessage"
17
18#include "libbb.h"
19
20int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
21int wall_main(int argc UNUSED_PARAM, char **argv)
22{
23    struct utmp *ut;
24    char *msg;
25    int fd = argv[1] ? xopen(argv[1], O_RDONLY) : STDIN_FILENO;
26
27    msg = xmalloc_read(fd, NULL);
28    if (ENABLE_FEATURE_CLEAN_UP && argv[1])
29        close(fd);
30    setutent();
31    while ((ut = getutent()) != NULL) {
32        char *line;
33        if (ut->ut_type != USER_PROCESS)
34            continue;
35        line = concat_path_file("/dev", ut->ut_line);
36        xopen_xwrite_close(line, msg);
37        free(line);
38    }
39    if (ENABLE_FEATURE_CLEAN_UP) {
40        endutent();
41        free(msg);
42    }
43    return EXIT_SUCCESS;
44}
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