busybox/miscutils/wall.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 tarball for details.
 */

#include "libbb.h"
#include <utmp.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;
}
1	niro	984	/* 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			}