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- /* Copyright (C) 1991 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <stddef.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
-
- /* Close a stream. */
- int
- DEFUN(fclose, (stream), register FILE *stream)
- {
- int status;
-
- if (stream == NULL)
- {
- /* Close all streams. */
- register FILE *f;
- for (f = __stdio_head; f != NULL; f = f->__next)
- if (__validfp(f))
- (void) fclose(f);
- return 0;
- }
-
- if (!__validfp(stream))
- {
- errno = EINVAL;
- return EOF;
- }
-
- if (stream->__mode.__write &&
- /* Flush the buffer. */
- __flshfp (stream, EOF) == EOF)
- return EOF;
-
- /* Free the buffer's storage. */
- if (stream->__buffer != NULL && !stream->__userbuf)
- free(stream->__buffer);
-
- /* Close the system file descriptor. */
- if (stream->__io_funcs.__close != NULL)
- status = (*stream->__io_funcs.__close)(stream->__cookie);
- else if (!stream->__seen && stream->__cookie != NULL)
- status = __stdio_close(stream->__cookie);
- else
- status = 0;
-
- /* Nuke the stream, making it available for re-use. */
- __invalidate(stream);
-
- return status < 0 ? EOF : 0;
- }
-