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- /* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <errno.h>
- #include <limits.h>
- #include <stddef.h>
- #include <stdlib.h>
- #include <dirent.h>
- #include <fcntl.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <unistd.h>
- #include <stdio.h>
-
- #include "direct.h" /* This file defines `struct direct'. */
-
- /* Open a directory stream on NAME. */
- DIR *
- DEFUN(opendir, (name), CONST char *name)
- {
- DIR *dirp;
- struct stat statbuf;
- int fd;
-
- if (name[0] == '\0')
- {
- /* POSIX.1-1990 says an empty name gets ENOENT;
- but `open' might like it fine. */
- errno = ENOENT;
- return NULL;
- }
-
- fd = __open (name, O_RDONLY);
- if (fd < 0)
- return NULL;
-
- if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)
- goto lose;
-
- if (fstat (fd, &statbuf) < 0)
- goto lose;
- if (! S_ISDIR (statbuf.st_mode))
- {
- errno = ENOTDIR;
- goto lose;
- }
-
- dirp = (DIR *) calloc (1, sizeof (DIR) + NAME_MAX); /* Zero-fill. */
- if (dirp == NULL)
- lose:
- {
- int save = errno;
- (void) __close (fd);
- errno = save;
- return NULL;
- }
-
- #ifdef _STATBUF_ST_BLKSIZE
- if (statbuf.st_blksize < sizeof (struct direct))
- dirp->__allocation = sizeof (struct direct);
- else
- dirp->__allocation = statbuf.st_blksize;
- #else
- dirp->__allocation = (BUFSIZ < sizeof (struct direct) ?
- sizeof (struct direct) : BUFSIZ);
- #endif
- dirp->__data = (char *) malloc (dirp->__allocation);
- if (dirp->__data == NULL)
- {
- int save = errno;
- free ((PTR) dirp);
- (void) __close (fd);
- errno = save;
- return NULL;
- }
-
- dirp->__fd = fd;
- return dirp;
- }
-