busybox/coreutils/cat.c

/* vi: set sw=4 ts=4: */
/*
 * cat implementation for busybox
 *
 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
 *
 * Licensed under GPLv2, see file License in this tarball for details.
 */

/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */

//kbuild:lib-$(CONFIG_CAT)     += cat.o
//kbuild:lib-$(CONFIG_MORE)    += cat.o # more uses it if stdout isn't a tty
//kbuild:lib-$(CONFIG_LESS)    += cat.o # less too
//kbuild:lib-$(CONFIG_CRONTAB) += cat.o # crontab -l

//config:config CAT
//config:	bool "cat"
//config:	default y
//config:	help
//config:	  cat is used to concatenate files and print them to the standard
//config:	  output. Enable this option if you wish to enable the 'cat' utility.

#include "libbb.h"

/* This is a NOFORK applet. Be very careful! */


int bb_cat(char **argv)
{
	int fd;
	int retval = EXIT_SUCCESS;

	if (!*argv)
		argv = (char**) &bb_argv_dash;

	do {
		fd = open_or_warn_stdin(*argv);
		if (fd >= 0) {
			/* This is not a xfunc - never exits */
			off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
			if (fd != STDIN_FILENO)
				close(fd);
			if (r >= 0)
				continue;
		}
		retval = EXIT_FAILURE;
	} while (*++argv);

	return retval;
}

int cat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int cat_main(int argc UNUSED_PARAM, char **argv)
{
	getopt32(argv, "u");
	argv += optind;
	return bb_cat(argv);
}
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	//kbuild:lib-$(CONFIG_CAT) += cat.o
14	//kbuild:lib-$(CONFIG_MORE) += cat.o # more uses it if stdout isn't a tty
15	//kbuild:lib-$(CONFIG_LESS) += cat.o # less too
16	//kbuild:lib-$(CONFIG_CRONTAB) += cat.o # crontab -l
17
18	//config:config CAT
19	//config: bool "cat"
20	//config: default y
21	//config: help
22	//config: cat is used to concatenate files and print them to the standard
23	//config: output. Enable this option if you wish to enable the 'cat' utility.
24
25	#include "libbb.h"
26
27	/* This is a NOFORK applet. Be very careful! */
28
29
30	int bb_cat(char **argv)
31	{
32	int fd;
33	int retval = EXIT_SUCCESS;
34
35	if (!*argv)
36	argv = (char**) &bb_argv_dash;
37
38	do {
39	fd = open_or_warn_stdin(*argv);
40	if (fd >= 0) {
41	/* This is not a xfunc - never exits */
42	off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
43	if (fd != STDIN_FILENO)
44	close(fd);
45	if (r >= 0)
46	continue;
47	}
48	retval = EXIT_FAILURE;
49	} while (*++argv);
50
51	return retval;
52	}
53
54	int cat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
55	int cat_main(int argc UNUSED_PARAM, char **argv)
56	{
57	getopt32(argv, "u");
58	argv += optind;
59	return bb_cat(argv);
60	}