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glibc/sysdeps/mach/hurd/readdir64_r.c
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/* Copyright (C) 2001,02 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 Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, write to the Free | |
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
02111-1307 USA. */ | |
#include <dirent.h> | |
#include <stddef.h> | |
#include <string.h> | |
#include <hurd.h> | |
#include <hurd/fs.h> | |
#include <hurd/fd.h> | |
#include "dirstream.h" | |
/* Read a directory entry from DIRP. */ | |
int | |
__readdir64_r (DIR *dirp, struct dirent64 *entry, struct dirent64 **result) | |
{ | |
struct dirent64 *dp; | |
error_t err = 0; | |
if (dirp == NULL) | |
{ | |
errno = EINVAL; | |
return errno; | |
} | |
__libc_lock_lock (dirp->__lock); | |
do | |
{ | |
if (dirp->__ptr - dirp->__data >= dirp->__size) | |
{ | |
/* We've emptied out our buffer. Refill it. */ | |
char *data = dirp->__data; | |
int nentries; | |
if (err = HURD_FD_PORT_USE (dirp->__fd, | |
__dir_readdir (port, | |
&data, &dirp->__size, | |
dirp->__entry_ptr, | |
-1, 0, &nentries))) | |
{ | |
__hurd_fail (err); | |
dp = NULL; | |
break; | |
} | |
/* DATA now corresponds to entry index DIRP->__entry_ptr. */ | |
dirp->__entry_data = dirp->__entry_ptr; | |
if (data != dirp->__data) | |
{ | |
/* The data was passed out of line, so our old buffer is no | |
longer useful. Deallocate the old buffer and reset our | |
information for the new buffer. */ | |
__vm_deallocate (__mach_task_self (), | |
(vm_address_t) dirp->__data, | |
dirp->__allocation); | |
dirp->__data = data; | |
dirp->__allocation = round_page (dirp->__size); | |
} | |
/* Reset the pointer into the buffer. */ | |
dirp->__ptr = dirp->__data; | |
if (nentries == 0) | |
{ | |
/* End of file. */ | |
dp = NULL; | |
break; | |
} | |
/* We trust the filesystem to return correct data and so we | |
ignore NENTRIES. */ | |
} | |
dp = (struct dirent64 *) dirp->__ptr; | |
dirp->__ptr += dp->d_reclen; | |
++dirp->__entry_ptr; | |
/* Loop to ignore deleted files. */ | |
} while (dp->d_fileno == 0); | |
if (dp) | |
{ | |
*entry = *dp; | |
memcpy (entry->d_name, dp->d_name, dp->d_namlen + 1); | |
*result = entry; | |
} | |
else | |
*result = NULL; | |
__libc_lock_unlock (dirp->__lock); | |
return dp ? 0 : err ? errno : 0; | |
} | |
weak_alias (__readdir64_r, readdir64_r) |