tar: support -T - and -X -

[oweals/busybox.git] / libbb / wfopen_input.c

diff --git a/libbb/wfopen_input.c b/libbb/wfopen_input.c
index bff6606b5db3d32f010872acbd72604cc22cf95e..d8b1c4a36d728570b2516acbb8e23343e8e8829a 100644 (file)
--- a/libbb/wfopen_input.c
+++ b/libbb/wfopen_input.c
@@ -4,51 +4,53 @@
  *
  * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * 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.
- *
- * Note: We also consider "" to main stdin (for 'cmp' at least).
  */
 
-#include <stdio.h>
-#include <sys/stat.h>
-#include <libbb.h>
+#include "libbb.h"
 
-FILE *bb_wfopen_input(const char *filename)
+FILE* FAST_FUNC fopen_or_warn_stdin(const char *filename)
 {
        FILE *fp = stdin;
 
-       if ((filename != bb_msg_standard_input)
-               && filename[0] && ((filename[0] != '-') || filename[1])
+       if (filename != bb_msg_standard_input
+        && NOT_LONE_DASH(filename)
        ) {
-#if 0
-               /* This check shouldn't be necessary for linux, but is left
-                * here disabled just in case. */
-               struct stat stat_buf;
-               if (is_directory(filename, 1, &stat_buf)) {
-                       bb_error_msg("%s: Is a directory", filename);
-                       return NULL;
-               }
-#endif
-               fp = bb_wfopen(filename, "r");
+               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. */
+}