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Mon Mar 4 17:35:09 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>

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* hurd/catch-signal.c (hurd_safe_memmove): New function.
	(hurd_safe_copyin, hurd_safe_copyout): New functions.
	* hurd/hurd/sigpreempt.h: Declare them.
This commit is contained in:
Roland McGrath
1996-03-04 22:45:04 +00:00
parent 661fa17673
commit c3d3967cd2
4 changed files with 92 additions and 114 deletions
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43
sysdeps/unix/bsd/dirstream.h
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@ -1,43 +0,0 @@
/* Copyright (C) 1993, 1994, 1995 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. */
#ifndef _DIRSTREAM_H
#define _DIRSTREAM_H 1
#define __need_size_t
#include <stddef.h>
#include <gnu/types.h> /* For __off_t. */
/* Directory stream type.
The BSD directory format is the same as `struct dirent', so `readdir'
returns a pointer into the buffer we read directory data into. */
struct __dirstream
{
int __fd; /* File descriptor. */
char *__data; /* Directory block. */
size_t __allocation; /* Space allocated for the block. */
size_t __offset; /* Current offset into the block. */
size_t __size; /* Total valid data in the block. */
__off_t __pos; /* Position in directory of this block. */
};
#endif /* dirstream.h */

70
sysdeps/unix/bsd/readdir.c
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/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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 <string.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/types.h>
#include "direct.h"
#include "dirstream.h"
/* Read a directory entry from DIRP. */
struct dirent *
DEFUN(readdir, (dirp), DIR *dirp)
{
struct dirent *dp;
if (dirp == NULL || dirp->__data == NULL)
{
errno = EINVAL;
return NULL;
}
do
{
if (dirp->__offset >= dirp->__size)
{
/* We've emptied out our buffer. Refill it. */
ssize_t bytes = __getdirentries (dirp->__fd, dirp->__data,
dirp->__allocation, &dirp->__pos);
if (bytes <= 0)
return NULL;
dirp->__size = (size_t) bytes;
/* Reset the offset into the buffer. */
dirp->__offset = 0;
}
dp = (struct dirent *) &dirp->__data[dirp->__offset];
dirp->__offset += dp->d_reclen;
#ifndef HAVE_D_TYPE
dp->d_namlen = ((struct direct *) dp)->d_namlen;
dp->d_type = DT_UNKNOWN;
#endif
/* Loop to ignore deleted files. */
} while (dp->d_fileno == 0);
return dp;
}