libbb: move nuke_str() from passwd into libbb

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

diff --git a/libbb/wfopen.c b/libbb/wfopen.c
index 1cb871ef516d21480fb1474fab11ef3ce77ca1e7..76dc8b82a0312b31d16e38e5727e527aad0a30c7 100644 (file)
--- a/libbb/wfopen.c
+++ b/libbb/wfopen.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 
 #include "libbb.h"
@@ -38,3 +38,19 @@ FILE* FAST_FUNC xfopen_for_write(const char *path)
 {
        return xfopen(path, "w");
 }
+
+static FILE* xfdopen_helper(unsigned fd_and_rw_bit)
+{
+       FILE* fp = fdopen(fd_and_rw_bit >> 1, fd_and_rw_bit & 1 ? "w" : "r");
+       if (!fp)
+               bb_error_msg_and_die(bb_msg_memory_exhausted);
+       return fp;
+}
+FILE* FAST_FUNC xfdopen_for_read(int fd)
+{
+       return xfdopen_helper(fd << 1);
+}
+FILE* FAST_FUNC xfdopen_for_write(int fd)
+{
+       return xfdopen_helper((fd << 1) + 1);
+}