hush/libbb/wfopen_input.c
Denys Vlasenko e7b0a9e5bc patch: support "patch [FILE [PATCH]]" format
function                                             old     new   delta
xopen_stdin                                            -      15     +15
patch_main                                          2075    2041     -34

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-08-22 05:39:15 +02:00

57 lines
1.2 KiB
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. */
}