f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/* $NetBSD: fdopen.c,v 1.16 2012/03/15 18:22:30 christos Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Chris Torek.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
static char sccsid[] = "@(#)fdopen.c 8.1 (Berkeley) 6/4/93";
|
|
#else
|
|
__RCSID("$NetBSD: fdopen.c,v 1.16 2012/03/15 18:22:30 christos Exp $");
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <limits.h>
|
|
|
|
#include "reentrant.h"
|
|
#include "local.h"
|
|
|
|
#ifdef __weak_alias
|
|
__weak_alias(fdopen,_fdopen)
|
|
#endif
|
|
|
|
FILE *
|
|
fdopen(int fd, const char *mode)
|
|
{
|
|
FILE *fp;
|
|
int flags, oflags, fdflags, tmp;
|
|
|
|
_DIAGASSERT(fd != -1);
|
|
|
|
/*
|
|
* File descriptors are a full int, but _file is only a short.
|
|
* If we get a valid file descriptor that is greater or equal to
|
|
* USHRT_MAX, then the fd will get sign-extended into an
|
|
* invalid file descriptor. Handle this case by failing the
|
|
* open. (We treat the short as unsigned, and special-case -1).
|
|
*/
|
|
if (fd >= USHRT_MAX) {
|
|
errno = EMFILE;
|
|
return NULL;
|
|
}
|
|
|
|
if ((flags = __sflags(mode, &oflags)) == 0)
|
|
return NULL;
|
|
|
|
/* Make sure the mode the user wants is a subset of the actual mode. */
|
|
if ((fdflags = fcntl(fd, F_GETFL, 0)) < 0)
|
|
return NULL;
|
|
tmp = fdflags & O_ACCMODE;
|
|
if (tmp != O_RDWR && (tmp != (oflags & O_ACCMODE))) {
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
if (oflags & O_NONBLOCK) {
|
|
struct stat st;
|
|
if (fstat(fd, &st) == -1) {
|
|
return NULL;
|
|
}
|
|
if (!S_ISREG(st.st_mode)) {
|
|
errno = EFTYPE;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if ((fp = __sfp()) == NULL)
|
|
return NULL;
|
|
fp->_flags = flags;
|
|
/*
|
|
* If opened for appending, but underlying descriptor does not have
|
|
* O_APPEND bit set, assert __SAPP so that __swrite() will lseek to
|
|
* end before each write.
|
|
*/
|
|
if ((oflags & O_APPEND) && !(fdflags & O_APPEND))
|
|
fp->_flags |= __SAPP;
|
|
fp->_file = fd;
|
|
fp->_cookie = fp;
|
|
fp->_read = __sread;
|
|
fp->_write = __swrite;
|
|
fp->_seek = __sseek;
|
|
fp->_close = __sclose;
|
|
return fp;
|
|
}
|