mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 03:10:05 +00:00
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/* 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;
|
|
}
|