56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* wfopen_input implementation for busybox
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*
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* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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/* A number of applets need to open a file for reading, where the filename
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* is a command line arg. Since often that arg is '-' (meaning stdin),
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* we avoid testing everywhere by consolidating things in this routine.
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*/
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FILE* FAST_FUNC fopen_or_warn_stdin(const char *filename)
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{
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FILE *fp = stdin;
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if (filename != bb_msg_standard_input
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&& NOT_LONE_DASH(filename)
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) {
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fp = fopen_or_warn(filename, "r");
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}
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return fp;
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}
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FILE* FAST_FUNC xfopen_stdin(const char *filename)
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{
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FILE *fp = fopen_or_warn_stdin(filename);
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if (fp)
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return fp;
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xfunc_die(); /* We already output an error message. */
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}
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int FAST_FUNC open_or_warn_stdin(const char *filename)
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{
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int fd = STDIN_FILENO;
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if (filename != bb_msg_standard_input
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&& NOT_LONE_DASH(filename)
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) {
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fd = open_or_warn(filename, O_RDONLY);
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}
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return fd;
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}
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int FAST_FUNC xopen_stdin(const char *filename)
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{
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int fd = open_or_warn_stdin(filename);
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if (fd >= 0)
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return fd;
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xfunc_die(); /* We already output an error message. */
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}
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