mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
/*******************************************************************************
|
|
|
|
Copyright(C) Jonas 'Sortie' Termansen 2011, 2014, 2015.
|
|
|
|
This file is part of the Sortix C Library.
|
|
|
|
The Sortix 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 3 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The Sortix 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 Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
dirent/readdir.cpp
|
|
Reads a directory entry from a directory stream into a DIR-specific buffer.
|
|
|
|
*******************************************************************************/
|
|
|
|
#include <sys/readdirents.h>
|
|
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
|
|
extern "C" struct dirent* readdir(DIR* dir)
|
|
{
|
|
int old_errno = errno;
|
|
struct dirent fallback;
|
|
struct dirent* entry = dir->entry ? dir->entry : &fallback;
|
|
size_t size = dir->entry ? dir->size : sizeof(fallback);
|
|
ssize_t amount;
|
|
while ( (amount = readdirents(dir->fd, entry, size)) < 0 )
|
|
{
|
|
if ( errno != ERANGE )
|
|
return NULL;
|
|
errno = old_errno;
|
|
size_t needed = entry->d_reclen;
|
|
free(dir->entry);
|
|
dir->entry = NULL;
|
|
struct dirent* new_dirent = (struct dirent*) malloc(needed);
|
|
if ( !new_dirent )
|
|
return NULL;
|
|
entry = dir->entry = new_dirent;
|
|
size = dir->size = needed;
|
|
}
|
|
if ( amount == 0 )
|
|
return NULL;
|
|
return dir->entry;
|
|
}
|