84d9c625bf
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
172 lines
4.3 KiB
C
172 lines
4.3 KiB
C
/* $NetBSD: opendir.c,v 1.38 2011/10/15 23:00:01 christos Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)opendir.c 8.7 (Berkeley) 12/10/94";
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#else
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__RCSID("$NetBSD: opendir.c,v 1.38 2011/10/15 23:00:01 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include "reentrant.h"
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#include "extern.h"
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <assert.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "dirent_private.h"
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static DIR *__opendir_common(int, const char *, int);
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__weak_alias(fdopendir,_fdopendir)
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/*
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* Open a directory.
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*/
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DIR *
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opendir(const char *name)
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{
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_DIAGASSERT(name != NULL);
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return (__opendir2(name, DTF_HIDEW|DTF_NODUP));
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}
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DIR *
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__opendir2(const char *name, int flags)
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{
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int fd;
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if ((fd = open(name, O_RDONLY | O_NONBLOCK | O_CLOEXEC)) == -1)
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return NULL;
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return __opendir_common(fd, name, flags);
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}
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#ifndef __LIBC12_SOURCE__
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DIR *
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_fdopendir(int fd)
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{
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if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
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return NULL;
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return __opendir_common(fd, NULL, DTF_HIDEW|DTF_NODUP);
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}
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#endif
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static DIR *
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__opendir_common(int fd, const char *name, int flags)
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{
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DIR *dirp = NULL;
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int serrno;
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struct stat sb;
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#if !defined(__minix)
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struct statvfs sfb;
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#endif /* !defined(__minix) */
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int error;
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if (fstat(fd, &sb) || !S_ISDIR(sb.st_mode)) {
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errno = ENOTDIR;
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goto error;
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}
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if ((dirp = malloc(sizeof(*dirp))) == NULL)
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goto error;
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dirp->dd_buf = NULL;
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dirp->dd_internal = NULL;
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#ifdef _REENTRANT
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if (__isthreaded) {
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if ((dirp->dd_lock = malloc(sizeof(mutex_t))) == NULL)
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goto error;
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mutex_init((mutex_t *)dirp->dd_lock, NULL);
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}
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#endif
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/*
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* Tweak flags for the underlying filesystem.
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*/
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#if defined(__minix)
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/* MOUNT_UNION and MOUNT_NFS not supported */
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flags &= ~DTF_NODUP;
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#else
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if (fstatvfs1(fd, &sfb, ST_NOWAIT) < 0)
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goto error;
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if ((flags & DTF_NODUP) != 0) {
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if (!strncmp(sfb.f_fstypename, MOUNT_UNION,
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sizeof(sfb.f_fstypename)) ||
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(sfb.f_flag & MNT_UNION) != 0) {
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flags |= __DTF_READALL;
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} else {
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flags &= ~DTF_NODUP;
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}
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}
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if (!strncmp(sfb.f_fstypename, MOUNT_NFS, sizeof(sfb.f_fstypename))) {
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flags |= __DTF_READALL | __DTF_RETRY_ON_BADCOOKIE;
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}
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#endif /* !defined(__minix) */
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dirp->dd_flags = flags;
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error = _initdir(dirp, fd, name);
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if (error) {
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errno = error;
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goto error;
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}
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return (dirp);
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error:
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serrno = errno;
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if (dirp != NULL) {
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#ifdef _REENTRANT
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if (__isthreaded) {
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mutex_destroy((mutex_t *)dirp->dd_lock);
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free(dirp->dd_lock);
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}
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#endif
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free(dirp->dd_buf);
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}
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free(dirp);
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if (fd != -1)
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(void)close(fd);
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errno = serrno;
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return NULL;
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}
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