1/* vi: set sw=4 ts=4: */
2/*
3 * cat implementation for busybox
4 *
5 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
6 *
7 * Licensed under GPLv2, see file License in this tarball for details.
8 */
9
10/* BB_AUDIT SUSv3 compliant */
11/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
12
13#include "libbb.h"
14
15/* This is a NOFORK applet. Be very careful! */
16
17
18int bb_cat(char **argv)
19{
20	static const char *const argv_dash[] = { "-", NULL };
21
22	int fd;
23	int retval = EXIT_SUCCESS;
24
25	if (!*argv)
26		argv = (char**) &argv_dash;
27
28	do {
29		fd = STDIN_FILENO;
30		if (!LONE_DASH(*argv))
31			fd = open_or_warn(*argv, O_RDONLY);
32		if (fd >= 0) {
33			/* This is not an xfunc - never exits */
34			off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
35			if (fd != STDIN_FILENO)
36				close(fd);
37			if (r >= 0)
38				continue;
39		}
40		retval = EXIT_FAILURE;
41	} while (*++argv);
42
43	return retval;
44}
45
46int cat_main(int argc, char **argv);
47int cat_main(int argc, char **argv)
48{
49	getopt32(argv, "u");
50	argv += optind;
51	return bb_cat(argv);
52}
53