release/src-rt-6.x.4708/router/busybox/libbb/fclose_nonstdin.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * fclose_nonstdin implementation for busybox
   4  *
   5  * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9
  10 /* A number of standard utilities can accept multiple command line args
  11  * of '-' for stdin, according to SUSv3.  So we encapsulate the check
  12  * here to save a little space.
  13  */
  14
  15 #include "libbb.h"
  16
  17 int FAST_FUNC fclose_if_not_stdin(FILE *f)
  18 {
  19         /* Some more paranoid applets want ferror() check too */
  20         int r = ferror(f); /* NB: does NOT set errno! */
  21         if (r)
  22                 errno = EIO; /* so we'll help it */
  23         if (f != stdin)
  24                 return (r | fclose(f)); /* fclose does set errno on error */
  25         return r;
  26 }