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/* 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 tarball for details.
*/
/* 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;
}
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