1 /* vi: set sw=4 ts=4: */
3 * wall - write a message to all logged-in users
4 * Copyright (c) 2009 Bernhard Reutner-Fischer
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9 //usage:#define wall_trivial_usage
11 //usage:#define wall_full_usage "\n\n"
12 //usage: "Write content of FILE or stdin to all logged-in users"
14 //usage:#define wall_sample_usage
15 //usage: "echo foo | wall\n"
16 //usage: "wall ./mymessage"
20 int wall_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
21 int wall_main(int argc UNUSED_PARAM
, char **argv
)
25 int fd
= argv
[1] ? xopen(argv
[1], O_RDONLY
) : STDIN_FILENO
;
27 msg
= xmalloc_read(fd
, NULL
);
28 if (ENABLE_FEATURE_CLEAN_UP
&& argv
[1])
31 while ((ut
= getutent()) != NULL
) {
33 if (ut
->ut_type
!= USER_PROCESS
)
35 line
= concat_path_file("/dev", ut
->ut_line
);
36 xopen_xwrite_close(line
, msg
);
39 if (ENABLE_FEATURE_CLEAN_UP
) {