#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)telldir.c 8.1 (Berkeley) 6/4/93";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/gen/telldir.c,v 1.11 2008/05/05 14:05:23 kib Exp $");
#include "namespace.h"
#include <sys/param.h>
#include <sys/queue.h>
#include <dirent.h>
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include "un-namespace.h"
#include "libc_private.h"
#include "telldir.h"
#if !__DARWIN_UNIX03
#define SINGLEUSE
#endif
long
telldir(dirp)
DIR *dirp;
{
struct ddloc *lp;
#if __DARWIN_UNIX03
if (__isthreaded)
_pthread_mutex_lock(&dirp->dd_lock);
LIST_FOREACH(lp, &dirp->dd_td->td_locq, loc_lqe) {
if (
#if __DARWIN_64_BIT_INO_T
(lp->loc_seek == dirp->dd_td->seekoff)
#else
(lp->loc_seek == dirp->dd_seek)
#endif
&& (lp->loc_loc == dirp->dd_loc))
goto found;
}
if ((lp = (struct ddloc *)malloc(sizeof(struct ddloc))) == NULL) {
if (__isthreaded)
_pthread_mutex_unlock(&dirp->dd_lock);
return (-1);
}
#else
if ((lp = (struct ddloc *)malloc(sizeof(struct ddloc))) == NULL)
return (-1);
if (__isthreaded)
_pthread_mutex_lock(&dirp->dd_lock);
#endif
lp->loc_index = dirp->dd_td->td_loccnt++;
#if __DARWIN_64_BIT_INO_T
lp->loc_seek = dirp->dd_td->seekoff;
#else
lp->loc_seek = dirp->dd_seek;
#endif
lp->loc_loc = dirp->dd_loc;
LIST_INSERT_HEAD(&dirp->dd_td->td_locq, lp, loc_lqe);
#if __DARWIN_UNIX03
found:
#endif
if (__isthreaded)
_pthread_mutex_unlock(&dirp->dd_lock);
return (lp->loc_index);
}
void
_seekdir(dirp, loc)
DIR *dirp;
long loc;
{
struct ddloc *lp;
struct dirent *dp;
LIST_FOREACH(lp, &dirp->dd_td->td_locq, loc_lqe) {
if (lp->loc_index == loc)
break;
}
if (lp == NULL)
return;
if (lp->loc_loc == dirp->dd_loc &&
#if __DARWIN_64_BIT_INO_T
lp->loc_seek == dirp->dd_td->seekoff
#else
lp->loc_seek == dirp->dd_seek
#endif
)
goto found;
(void) lseek(dirp->dd_fd, (off_t)lp->loc_seek, SEEK_SET);
#if __DARWIN_64_BIT_INO_T
dirp->dd_td->seekoff = lp->loc_seek;
#else
dirp->dd_seek = lp->loc_seek;
#endif
dirp->dd_loc = 0;
while (dirp->dd_loc < lp->loc_loc) {
dp = _readdir_unlocked(dirp, 0);
if (dp == NULL)
break;
}
found:;
#ifdef SINGLEUSE
LIST_REMOVE(lp, loc_lqe);
free((caddr_t)lp);
#endif
}
#ifndef BUILDING_VARIANT
void
_reclaim_telldir(dirp)
DIR *dirp;
{
struct ddloc *lp;
struct ddloc *templp;
lp = LIST_FIRST(&dirp->dd_td->td_locq);
while (lp != NULL) {
templp = lp;
lp = LIST_NEXT(lp, loc_lqe);
free(templp);
}
LIST_INIT(&dirp->dd_td->td_locq);
}
#endif