busybox/libbb/wfopen_input.c

/* vi: set sw=4 ts=4: */
/*
 * wfopen_input implementation for busybox
 *
 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 */

/* A number of applets need to open a file for reading, where the filename
 * is a command line arg.  Since often that arg is '-' (meaning stdin),
 * we avoid testing everywhere by consolidating things in this routine.
 */

#include "libbb.h"

FILE* FAST_FUNC fopen_or_warn_stdin(const char *filename)
{
	FILE *fp = stdin;

	if (filename != bb_msg_standard_input
	 && NOT_LONE_DASH(filename)
	) {
		fp = fopen_or_warn(filename, "r");
	}
	return fp;
}

FILE* FAST_FUNC xfopen_stdin(const char *filename)
{
	FILE *fp = fopen_or_warn_stdin(filename);
	if (fp)
		return fp;
	xfunc_die();	/* We already output an error message. */
}

int FAST_FUNC open_or_warn_stdin(const char *filename)
{
	int fd = STDIN_FILENO;

	if (filename != bb_msg_standard_input
	 && NOT_LONE_DASH(filename)
	) {
		fd = open_or_warn(filename, O_RDONLY);
	}

	return fd;
}

int FAST_FUNC xopen_stdin(const char *filename)
{
	int fd = open_or_warn_stdin(filename);
	if (fd >= 0)
		return fd;
	xfunc_die();	/* We already output an error message. */
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* wfopen_input implementation for busybox
4	*
5	* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
6	*
7	* Licensed under GPLv2 or later, see file LICENSE in this source tree.
8	*/
9
10	/* A number of applets need to open a file for reading, where the filename
11	* is a command line arg. Since often that arg is '-' (meaning stdin),
12	* we avoid testing everywhere by consolidating things in this routine.
13	*/
14
15	#include "libbb.h"
16
17	FILE* FAST_FUNC fopen_or_warn_stdin(const char *filename)
18	{
19	FILE *fp = stdin;
20
21	if (filename != bb_msg_standard_input
22	&& NOT_LONE_DASH(filename)
23	) {
24	fp = fopen_or_warn(filename, "r");
25	}
26	return fp;
27	}
28
29	FILE* FAST_FUNC xfopen_stdin(const char *filename)
30	{
31	FILE *fp = fopen_or_warn_stdin(filename);
32	if (fp)
33	return fp;
34	xfunc_die(); /* We already output an error message. */
35	}
36
37	int FAST_FUNC open_or_warn_stdin(const char *filename)
38	{
39	int fd = STDIN_FILENO;
40
41	if (filename != bb_msg_standard_input
42	&& NOT_LONE_DASH(filename)
43	) {
44	fd = open_or_warn(filename, O_RDONLY);
45	}
46
47	return fd;
48	}
49
50	int FAST_FUNC xopen_stdin(const char *filename)
51	{
52	int fd = open_or_warn_stdin(filename);
53	if (fd >= 0)
54	return fd;
55	xfunc_die(); /* We already output an error message. */
56	}