hush/miscutils/wall.c
Denys Vlasenko 8d0e0cdadf move utmp.h include to libbb.h
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2011-01-25 23:21:46 +01:00

36 lines
811 B
C

/* vi: set sw=4 ts=4: */
/*
* wall - write a message to all logged-in users
* Copyright (c) 2009 Bernhard Reutner-Fischer
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int wall_main(int argc UNUSED_PARAM, char **argv)
{
struct utmp *ut;
char *msg;
int fd = argv[1] ? xopen(argv[1], O_RDONLY) : STDIN_FILENO;
msg = xmalloc_read(fd, NULL);
if (ENABLE_FEATURE_CLEAN_UP && argv[1])
close(fd);
setutent();
while ((ut = getutent()) != NULL) {
char *line;
if (ut->ut_type != USER_PROCESS)
continue;
line = concat_path_file("/dev", ut->ut_line);
xopen_xwrite_close(line, msg);
free(line);
}
if (ENABLE_FEATURE_CLEAN_UP) {
endutent();
free(msg);
}
return EXIT_SUCCESS;
}