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/*
* Server-side symbolic link object management
*
* Copyright (C) 2005 Vitaliy Margolen
*
* 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 2.1 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "winternl.h"
#include "ddk/wdm.h"
#include "handle.h"
#include "request.h"
#include "object.h"
#include "unicode.h"
struct symlink
{
struct object obj; /* object header */
WCHAR *target; /* target of the symlink */
data_size_t len; /* target len in bytes */
};
static void symlink_dump( struct object *obj, int verbose );
static struct object_type *symlink_get_type( struct object *obj );
static unsigned int symlink_map_access( struct object *obj, unsigned int access );
static struct object *symlink_lookup_name( struct object *obj, struct unicode_str *name,
unsigned int attr );
static void symlink_destroy( struct object *obj );
static const struct object_ops symlink_ops =
{
sizeof(struct symlink), /* size */
symlink_dump, /* dump */
symlink_get_type, /* get_type */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
NULL, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
symlink_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
symlink_lookup_name, /* lookup_name */
no_open_file, /* open_file */
no_close_handle, /* close_handle */
symlink_destroy /* destroy */
};
static void symlink_dump( struct object *obj, int verbose )
{
struct symlink *symlink = (struct symlink *)obj;
assert( obj->ops == &symlink_ops );
fprintf( stderr, "Symlink " );
dump_object_name( obj );
fprintf( stderr, " -> L\"" );
dump_strW( symlink->target, symlink->len / sizeof(WCHAR), stderr, "\"\"" );
fprintf( stderr, "\"\n" );
}
static struct object_type *symlink_get_type( struct object *obj )
{
static const WCHAR name[] = {'S','y','m','b','o','l','i','c','L','i','n','k'};
static const struct unicode_str str = { name, sizeof(name) };
return get_object_type( &str );
}
static struct object *symlink_lookup_name( struct object *obj, struct unicode_str *name,
unsigned int attr )
{
struct symlink *symlink = (struct symlink *)obj;
struct unicode_str target_str, name_left;
struct object *target;
assert( obj->ops == &symlink_ops );
if (attr & OBJ_OPENLINK) return NULL;
target_str.str = symlink->target;
target_str.len = symlink->len;
if ((target = find_object_dir( NULL, &target_str, attr, &name_left )))
{
if (name_left.len)
{
release_object( target );
target = NULL;
set_error( STATUS_OBJECT_PATH_NOT_FOUND );
}
}
return target;
}
static unsigned int symlink_map_access( struct object *obj, unsigned int access )
{
if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SYMBOLIC_LINK_QUERY;
if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE;
if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
if (access & GENERIC_ALL) access |= SYMBOLIC_LINK_ALL_ACCESS;
return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
}
static void symlink_destroy( struct object *obj )
{
struct symlink *symlink = (struct symlink *)obj;
assert( obj->ops == &symlink_ops );
free( symlink->target );
}
struct symlink *create_symlink( struct directory *root, const struct unicode_str *name,
unsigned int attr, const struct unicode_str *target )
{
struct symlink *symlink;
if (!target->len)
{
set_error( STATUS_INVALID_PARAMETER );
return NULL;
}
if ((symlink = create_named_object_dir( root, name, attr, &symlink_ops )) &&
(get_error() != STATUS_OBJECT_NAME_EXISTS))
{
if ((symlink->target = memdup( target->str, target->len )))
symlink->len = target->len;
else
{
release_object( symlink );
symlink = NULL;
}
}
return symlink;
}
/* create a symbolic link object */
DECL_HANDLER(create_symlink)
{
struct symlink *symlink;
struct unicode_str name, target;
struct directory *root = NULL;
if (req->name_len > get_req_data_size())
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
name.str = get_req_data();
target.str = name.str + req->name_len / sizeof(WCHAR);
name.len = (target.str - name.str) * sizeof(WCHAR);
target.len = ((get_req_data_size() - name.len) / sizeof(WCHAR)) * sizeof(WCHAR);
if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
return;
if ((symlink = create_symlink( root, &name, req->attributes, &target )))
{
reply->handle = alloc_handle( current->process, symlink, req->access, req->attributes );
release_object( symlink );
}
if (root) release_object( root );
}
/* open a symbolic link object */
DECL_HANDLER(open_symlink)
{
struct unicode_str name;
struct directory *root = NULL;
struct symlink *symlink;
get_req_unicode_str( &name );
if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
return;
if ((symlink = open_object_dir( root, &name, req->attributes | OBJ_OPENLINK, &symlink_ops )))
{
reply->handle = alloc_handle( current->process, &symlink->obj, req->access, req->attributes );
release_object( symlink );
}
if (root) release_object( root );
}
/* query a symbolic link object */
DECL_HANDLER(query_symlink)
{
struct symlink *symlink;
symlink = (struct symlink *)get_handle_obj( current->process, req->handle,
SYMBOLIC_LINK_QUERY, &symlink_ops );
if (!symlink) return;
if (get_reply_max_size() < symlink->len)
set_error( STATUS_BUFFER_TOO_SMALL );
else
set_reply_data( symlink->target, symlink->len );
release_object( symlink );
}
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