/* vi: set sw=4 ts=4: *//* * unlink.c --- delete links in a ext2fs directory * * Copyright (C) 1993, 1994, 1997 Theodore Ts'o. * * %Begin-Header% * This file may be redistributed under the terms of the GNU Public * License. * %End-Header% */#include <stdio.h>#include <string.h>#if HAVE_UNISTD_H#include <unistd.h>#endif#include "ext2_fs.h"#include "ext2fs.h"struct link_struct  {	const char	*name;	int		namelen;	ext2_ino_t	inode;	int		flags;	struct ext2_dir_entry *prev;	int		done;};#ifdef __TURBOC__# pragma argsused#endifstatic int unlink_proc(struct ext2_dir_entry *dirent,		     int	offset EXT2FS_ATTR((unused)),		     int	blocksize EXT2FS_ATTR((unused)),		     char	*buf EXT2FS_ATTR((unused)),		     void	*priv_data){	struct link_struct *ls = (struct link_struct *) priv_data;	struct ext2_dir_entry *prev;	prev = ls->prev;	ls->prev = dirent;	if (ls->name) {		if ((dirent->name_len & 0xFF) != ls->namelen)			return 0;		if (strncmp(ls->name, dirent->name, dirent->name_len & 0xFF))			return 0;	}	if (ls->inode) {		if (dirent->inode != ls->inode)			return 0;	} else {		if (!dirent->inode)			return 0;	}	if (prev)		prev->rec_len += dirent->rec_len;	else		dirent->inode = 0;	ls->done++;	return DIRENT_ABORT|DIRENT_CHANGED;}#ifdef __TURBOC__ #pragma argsused#endiferrcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir,			const char *name, ext2_ino_t ino,			int flags EXT2FS_ATTR((unused))){	errcode_t	retval;	struct link_struct ls;	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);	if (!name && !ino)		return EXT2_ET_INVALID_ARGUMENT;	if (!(fs->flags & EXT2_FLAG_RW))		return EXT2_ET_RO_FILSYS;	ls.name = name;	ls.namelen = name ? strlen(name) : 0;	ls.inode = ino;	ls.flags = 0;	ls.done = 0;	ls.prev = 0;	retval = ext2fs_dir_iterate(fs, dir, DIRENT_FLAG_INCLUDE_EMPTY,				    0, unlink_proc, &ls);	if (retval)		return retval;	return (ls.done) ? 0 : EXT2_ET_DIR_NO_SPACE;}