_endopen.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* This routine is a special case, in that it is aware of
* both small and large file interfaces. It must be built
* in the small compilation environment.
*/
#include "lint.h"
#include "file64.h"
#include <mtlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
#include <thread.h>
#include <synch.h>
#include "stdiom.h"
#include <errno.h>
/*
* open UNIX file name, associate with iop
*/
FILE *
_endopen(const char *name, const char *type, FILE *iop, int largefile)
{
int oflag, fd, fflag;
char plus;
if (iop == NULL)
return (NULL);
switch (type[0]) {
default:
errno = EINVAL;
return (NULL);
case 'r':
oflag = O_RDONLY;
fflag = _IOREAD;
break;
case 'w':
oflag = O_WRONLY | O_TRUNC | O_CREAT;
fflag = _IOWRT;
break;
case 'a':
oflag = O_WRONLY | O_APPEND | O_CREAT;
fflag = _IOWRT;
break;
}
/* UNIX ignores 'b' and treats text and binary the same */
if ((plus = type[1]) == 'b')
plus = type[2];
if (plus == '+') {
oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
fflag = _IORW;
}
/* select small or large file open based on flag */
if (largefile) {
fd = open64(name, oflag, 0666);
} else {
fd = open(name, oflag, 0666);
}
if (fd < 0)
return (NULL);
/* As long as we make sure _flag stays != 0, we don't need to lock */
#ifdef _LP64
iop->_file = fd;
iop->_flag = (iop->_flag & ~0377) | fflag;
#else
if (fd <= _FILE_FD_MAX) {
SET_FILE(iop, fd);
} else if (_file_set(iop, fd, type) != 0) {
/* errno set in _file_set() */
(void) close(fd);
return (NULL);
}
iop->_flag = fflag;
#endif /* _LP64 */
if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) { /* type == "a" */
if (lseek64(fd, (off64_t)0, SEEK_END) < (off64_t)0) {
(void) close(fd);
return (NULL);
}
}
return (iop);
}