71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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/* Close a stream. */
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int
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DEFUN(fclose, (stream), register FILE *stream)
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{
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int status;
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if (stream == NULL)
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{
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/* Close all streams. */
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register FILE *f;
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for (f = __stdio_head; f != NULL; f = f->__next)
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if (__validfp(f))
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(void) fclose(f);
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return 0;
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}
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if (!__validfp(stream))
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{
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errno = EINVAL;
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return EOF;
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}
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if (stream->__mode.__write &&
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/* Flush the buffer. */
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__flshfp (stream, EOF) == EOF)
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return EOF;
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/* Free the buffer's storage. */
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if (stream->__buffer != NULL && !stream->__userbuf)
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free(stream->__buffer);
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/* Close the system file descriptor. */
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if (stream->__io_funcs.__close != NULL)
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status = (*stream->__io_funcs.__close)(stream->__cookie);
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else if (!stream->__seen && stream->__cookie != NULL)
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status = __stdio_close(stream->__cookie);
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else
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status = 0;
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/* Nuke the stream, making it available for re-use. */
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__invalidate(stream);
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return status < 0 ? EOF : 0;
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}
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