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131 lines
3.0 KiB
C
131 lines
3.0 KiB
C
/* Copyright (C) 1993-2016 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <not-cancel.h>
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#include "dirstream.h"
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/* Open a directory stream on a file descriptor in Hurd internal form.
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We do no checking here on the descriptor. */
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DIR *
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_hurd_fd_opendir (struct hurd_fd *d)
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{
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DIR *dirp;
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if (d == NULL)
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{
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errno = EBADF;
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return NULL;
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}
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dirp = (DIR *) malloc (sizeof (DIR));
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if (dirp == NULL)
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return NULL;
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/* Set the descriptor to close on exec. */
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HURD_CRITICAL_BEGIN;
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__spin_lock (&d->port.lock);
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d->flags |= FD_CLOEXEC;
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__spin_unlock (&d->port.lock);
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HURD_CRITICAL_END;
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dirp->__fd = d;
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dirp->__data = dirp->__ptr = NULL;
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dirp->__entry_data = dirp->__entry_ptr = 0;
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dirp->__allocation = 0;
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dirp->__size = 0;
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__libc_lock_init (dirp->__lock);
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return dirp;
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}
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DIR *
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internal_function
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__opendirat (int dfd, const char *name)
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{
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if (name[0] == '\0')
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{
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/* POSIX.1-1990 says an empty name gets ENOENT;
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but `open' might like it fine. */
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__set_errno (ENOENT);
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return NULL;
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}
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int flags = O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_CLOEXEC;
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int fd;
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#if IS_IN (rtld)
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assert (dfd == AT_FDCWD);
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fd = open_not_cancel_2 (name, flags);
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#else
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fd = openat_not_cancel_3 (dfd, name, flags);
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#endif
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if (fd < 0)
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return NULL;
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/* Extract the pointer to the descriptor structure. */
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DIR *dirp = _hurd_fd_opendir (_hurd_fd_get (fd));
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if (dirp == NULL)
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__close (fd);
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return dirp;
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}
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/* Open a directory stream on NAME. */
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DIR *
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__opendir (const char *name)
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{
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#if 0 /* TODO. */
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return __opendirat (AT_FDCWD, name);
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#else
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if (name[0] == '\0')
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{
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/* POSIX.1-1990 says an empty name gets ENOENT;
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but `open' might like it fine. */
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__set_errno (ENOENT);
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return NULL;
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}
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int fd = __open (name, O_RDONLY | O_NONBLOCK | O_DIRECTORY);
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if (fd < 0)
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return NULL;
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/* Extract the pointer to the descriptor structure. */
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DIR *dirp = _hurd_fd_opendir (_hurd_fd_get (fd));
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if (dirp == NULL)
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__close (fd);
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return dirp;
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#endif
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}
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weak_alias (__opendir, opendir)
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