Remove unused third_party/talloc

third_party/talloc/libreplace/repdir_getdirentries.c

-/* 
-   Unix SMB/CIFS implementation.
-
-   Copyright (C) Andrew Tridgell 2005
-
-     ** NOTE! The following LGPL license applies to the replace
-     ** library. This does NOT imply that all of Samba is released
-     ** under the LGPL
-   
-   This 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.
-
-   This 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 this library; if not, see <http://www.gnu.org/licenses/>.
-*/
-/*
-  a replacement for opendir/readdir/telldir/seekdir/closedir for BSD
-  systems using getdirentries
-
-  This is needed because the existing directory handling in FreeBSD
-  and OpenBSD (and possibly NetBSD) doesn't correctly handle unlink()
-  on files in a directory where telldir() has been used. On a block
-  boundary it will occasionally miss a file when seekdir() is used to
-  return to a position previously recorded with telldir().
-
-  This also fixes a severe performance and memory usage problem with
-  telldir() on BSD systems. Each call to telldir() in BSD adds an
-  entry to a linked list, and those entries are cleaned up on
-  closedir(). This means with a large directory closedir() can take an
-  arbitrary amount of time, causing network timeouts as millions of
-  telldir() entries are freed
-
-  Note! This replacement code is not portable. It relies on
-  getdirentries() always leaving the file descriptor at a seek offset
-  that is a multiple of DIR_BUF_SIZE. If the code detects that this
-  doesn't happen then it will abort(). It also does not handle
-  directories with offsets larger than can be stored in a long,
-
-  This code is available under other free software licenses as
-  well. Contact the author.
-*/
-
-#include "replace.h"
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <dirent.h>
-
-#define DIR_BUF_BITS 9
-#define DIR_BUF_SIZE (1<<DIR_BUF_BITS)
-
-struct dir_buf {
-        int fd;
-        int nbytes, ofs;
-        off_t seekpos;
-        char buf[DIR_BUF_SIZE];
-};
-
-DIR *opendir(const char *dname)
-{
-        struct dir_buf *d;
-        struct stat sb;
-        d = malloc(sizeof(*d));
-        if (d == NULL) {
-                errno = ENOMEM;
-                return NULL;
-        }
-        d->fd = open(dname, O_RDONLY);
-        if (d->fd == -1) {
-                free(d);
-                return NULL;
-        }
-        if (fstat(d->fd, &sb) < 0) {
-                close(d->fd);
-                free(d);
-                return NULL;
-        }
-        if (!S_ISDIR(sb.st_mode)) {
-                close(d->fd);
-                free(d);   
-                errno = ENOTDIR;
-                return NULL;
-        }
-        d->ofs = 0;
-        d->seekpos = 0;
-        d->nbytes = 0;
-        return (DIR *)d;
-}
-
-struct dirent *readdir(DIR *dir)
-{
-        struct dir_buf *d = (struct dir_buf *)dir;
-        struct dirent *de;
-
-        if (d->ofs >= d->nbytes) {
-                long pos;
-                d->nbytes = getdirentries(d->fd, d->buf, DIR_BUF_SIZE, &pos);
-                d->seekpos = pos;
-                d->ofs = 0;
-        }
-        if (d->ofs >= d->nbytes) {
-                return NULL;
-        }
-        de = (struct dirent *)&d->buf[d->ofs];
-        d->ofs += de->d_reclen;
-        return de;
-}
-
-#ifdef TELLDIR_TAKES_CONST_DIR
-long telldir(const DIR *dir)
-#else
-long telldir(DIR *dir)
-#endif
-{
-        struct dir_buf *d = (struct dir_buf *)dir;
-        if (d->ofs >= d->nbytes) {
-                d->seekpos = lseek(d->fd, 0, SEEK_CUR);
-                d->ofs = 0;
-                d->nbytes = 0;
-        }
-        /* this relies on seekpos always being a multiple of
-           DIR_BUF_SIZE. Is that always true on BSD systems? */
-        if (d->seekpos & (DIR_BUF_SIZE-1)) {
-                abort();
-        }
-        return d->seekpos + d->ofs;
-}
-
-#ifdef SEEKDIR_RETURNS_INT
-int seekdir(DIR *dir, long ofs)
-#else
-void seekdir(DIR *dir, long ofs)
-#endif
-{
-        struct dir_buf *d = (struct dir_buf *)dir;
-        long pos;
-        d->seekpos = lseek(d->fd, ofs & ~(DIR_BUF_SIZE-1), SEEK_SET);
-        d->nbytes = getdirentries(d->fd, d->buf, DIR_BUF_SIZE, &pos);
-        d->ofs = 0;
-        while (d->ofs < (ofs & (DIR_BUF_SIZE-1))) {
-                if (readdir(dir) == NULL) break;
-        }
-#ifdef SEEKDIR_RETURNS_INT
-        return -1;
-#endif
-}
-
-void rewinddir(DIR *dir)
-{
-        seekdir(dir, 0);
-}
-
-int closedir(DIR *dir)
-{
-        struct dir_buf *d = (struct dir_buf *)dir;
-        int r = close(d->fd);
-        if (r != 0) {
-                return r;
-        }
-        free(d);
-        return 0;
-}
-
-#ifndef dirfd
-/* darn, this is a macro on some systems. */
-int dirfd(DIR *dir)
-{
-        struct dir_buf *d = (struct dir_buf *)dir;
-        return d->fd;
-}
-#endif
-
-