mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-01 11:52:47 +00:00
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 1983 Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/* Modified from newlib/libc/posix/readdir.c */
|
|
|
|
#include <dirent.h>
|
|
#include <machine/syscall.h>
|
|
|
|
#define __NR___getdents64 __NR_getdents64
|
|
|
|
static _syscall3(int,__getdents64,int,fd,struct dirent64 *,dirp,unsigned int,count)
|
|
|
|
/*
|
|
* get next entry in a directory.
|
|
*/
|
|
struct dirent64 *
|
|
__readdir64 (dirp)
|
|
register DIR *dirp; {
|
|
register struct dirent64 *dp;
|
|
|
|
#ifdef HAVE_DD_LOCK
|
|
__lock_acquire_recursive(dirp->dd_lock);
|
|
#endif
|
|
|
|
if (dirp->dd_fd == -1)
|
|
return NULL;
|
|
|
|
for (;;) {
|
|
if (dirp->dd_loc == 0) {
|
|
dirp->dd_size = __getdents64 (dirp->dd_fd,
|
|
(void *)dirp->dd_buf,
|
|
dirp->dd_len);
|
|
|
|
if (dirp->dd_size <= 0) {
|
|
#ifdef HAVE_DD_LOCK
|
|
__lock_release_recursive(dirp->dd_lock);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
}
|
|
if (dirp->dd_loc >= dirp->dd_size) {
|
|
dirp->dd_loc = 0;
|
|
continue;
|
|
}
|
|
dp = (struct dirent64 *)(dirp->dd_buf + dirp->dd_loc);
|
|
if ((int)dp & 03) { /* bogus pointer check */
|
|
#ifdef HAVE_DD_LOCK
|
|
__lock_release_recursive(dirp->dd_lock);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
if (dp->d_reclen <= 0 ||
|
|
dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc) {
|
|
#ifdef HAVE_DD_LOCK
|
|
__lock_release_recursive(dirp->dd_lock);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
dirp->dd_loc += dp->d_reclen;
|
|
if (dp->d_ino == 0)
|
|
continue;
|
|
#ifdef HAVE_DD_LOCK
|
|
__lock_release_recursive(dirp->dd_lock);
|
|
#endif
|
|
return (dp);
|
|
}
|
|
}
|