fclose_nonstdin.c 715 B

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  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 tarball for details.
  8. */
  9. /* A number of standard utilities can accept multiple command line args
  10. * of '-' for stdin, according to SUSv3. So we encapsulate the check
  11. * here to save a little space.
  12. */
  13. #include "libbb.h"
  14. int FAST_FUNC fclose_if_not_stdin(FILE *f)
  15. {
  16. /* Some more paranoid applets want ferror() check too */
  17. int r = ferror(f); /* NB: does NOT set errno! */
  18. if (r) errno = EIO; /* so we'll help it */
  19. if (f != stdin)
  20. return (r | fclose(f)); /* fclose does set errno on error */
  21. return r;
  22. }