141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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FUNCTION
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<<fopen64>>---open a large file
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INDEX
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fopen64
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INDEX
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_fopen64_r
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ANSI_SYNOPSIS
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#include <stdio.h>
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FILE *fopen64(const char *<[file]>, const char *<[mode]>);
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FILE *_fopen64_r(void *<[reent]>,
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const char *<[file]>, const char *<[mode]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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FILE *fopen64(<[file]>, <[mode]>)
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char *<[file]>;
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char *<[mode]>;
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FILE *_fopen64_r(<[reent]>, <[file]>, <[mode]>)
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char *<[reent]>;
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char *<[file]>;
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char *<[mode]>;
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DESCRIPTION
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<<fopen64>> is identical to <<fopen>> except it opens a large file that
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is potentially >2GB in size. See <<fopen>> for further details.
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RETURNS
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<<fopen64>> return a file pointer which you can use for other file
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operations, unless the file you requested could not be opened; in that
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situation, the result is <<NULL>>. If the reason for failure was an
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invalid string at <[mode]>, <<errno>> is set to <<EINVAL>>.
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PORTABILITY
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<<fopen64>> is a glibc extension.
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Supporting OS subroutines required: <<close>>, <<fstat64>>, <<isatty>>,
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<<lseek64>>, <<open64>>, <<read>>, <<sbrk>>, <<write>>.
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*/
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/* Copied from fopen.c */
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "%W% (Berkeley) %G%";
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#endif /* LIBC_SCCS and not lint */
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#include <stdio.h>
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#include <errno.h>
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#include "local64.h"
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#ifdef __CYGWIN__
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#include <fcntl.h>
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#endif
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#include <sys/lock.h>
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#ifdef __LARGE64_FILES
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FILE *
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_DEFUN (_fopen64_r, (ptr, file, mode),
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struct _reent *ptr _AND
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_CONST char *file _AND
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_CONST char *mode)
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{
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register FILE *fp;
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register int f;
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int flags, oflags;
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if ((flags = __sflags (ptr, mode, &oflags)) == 0)
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return NULL;
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if ((fp = __sfp (ptr)) == NULL)
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return NULL;
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if ((f = _open64_r (ptr, file, oflags, 0666)) < 0)
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{
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__sfp_lock_acquire ();
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fp->_flags = 0; /* release */
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#ifndef __SINGLE_THREAD__
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__lock_close_recursive (fp->_lock);
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#endif
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__sfp_lock_release ();
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return NULL;
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}
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_flockfile(fp);
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fp->_file = f;
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fp->_flags = flags;
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fp->_cookie = (_PTR) fp;
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fp->_read = __sread;
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fp->_write = __swrite64;
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fp->_seek = __sseek;
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fp->_seek64 = __sseek64;
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fp->_close = __sclose;
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if (fp->_flags & __SAPP)
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_fseeko64_r (ptr, fp, 0, SEEK_END);
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#ifdef __SCLE
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if (__stextmode (fp->_file))
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fp->_flags |= __SCLE;
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#endif
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fp->_flags |= __SL64;
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_funlockfile(fp);
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return fp;
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}
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#ifndef _REENT_ONLY
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FILE *
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_DEFUN (fopen64, (file, mode),
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_CONST char *file _AND
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_CONST char *mode)
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{
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return _fopen64_r (_REENT, file, mode);
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}
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#endif
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#endif /* __LARGE64_FILES */
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