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Sweden-Number/server/registry.c

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/*
* Server-side registry management
*
* Copyright (C) 1999 Alexandre Julliard
*/
/* To do:
* - behavior with deleted keys
* - values larger than request buffer
* - symbolic links
*/
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <pwd.h>
#include "object.h"
#include "handle.h"
#include "request.h"
#include "unicode.h"
#include "winbase.h"
#include "winreg.h"
#include "winnt.h" /* registry definitions */
/* a registry key */
struct key
{
struct object obj; /* object header */
WCHAR *name; /* key name */
WCHAR *class; /* key class */
struct key *parent; /* parent key */
int last_subkey; /* last in use subkey */
int nb_subkeys; /* count of allocated subkeys */
struct key **subkeys; /* subkeys array */
int last_value; /* last in use value */
int nb_values; /* count of allocated values in array */
struct key_value *values; /* values array */
short flags; /* flags */
short level; /* saving level */
time_t modif; /* last modification time */
};
/* key flags */
#define KEY_VOLATILE 0x0001 /* key is volatile (not saved to disk) */
#define KEY_DELETED 0x0002 /* key has been deleted */
#define KEY_ROOT 0x0004 /* key is a root key */
/* a key value */
struct key_value
{
WCHAR *name; /* value name */
int type; /* value type */
size_t len; /* value data length in bytes */
void *data; /* pointer to value data */
};
#define MIN_SUBKEYS 8 /* min. number of allocated subkeys per key */
#define MIN_VALUES 8 /* min. number of allocated values per key */
/* the root keys */
#define HKEY_ROOT_FIRST HKEY_CLASSES_ROOT
#define HKEY_ROOT_LAST HKEY_DYN_DATA
#define NB_ROOT_KEYS (HKEY_ROOT_LAST - HKEY_ROOT_FIRST + 1)
#define IS_ROOT_HKEY(h) (((h) >= HKEY_ROOT_FIRST) && ((h) <= HKEY_ROOT_LAST))
static struct key *root_keys[NB_ROOT_KEYS];
static const char * const root_key_names[NB_ROOT_KEYS] =
{
"HKEY_CLASSES_ROOT",
"HKEY_CURRENT_USER",
"HKEY_LOCAL_MACHINE",
"HKEY_USERS",
"HKEY_PERFORMANCE_DATA",
"HKEY_CURRENT_CONFIG",
"HKEY_DYN_DATA"
};
/* keys saving level */
/* current_level is the level that is put into all newly created or modified keys */
/* saving_level is the minimum level that a key needs in order to get saved */
static int current_level;
static int saving_level;
static int saving_version = 1; /* file format version */
static struct timeval next_save_time; /* absolute time of next periodic save */
static int save_period; /* delay between periodic saves (ms) */
static struct timeout_user *save_timeout_user; /* saving timer */
/* information about where to save a registry branch */
struct save_branch_info
{
struct key *key;
char *path;
};
#define MAX_SAVE_BRANCH_INFO 8
static int save_branch_count;
static struct save_branch_info save_branch_info[MAX_SAVE_BRANCH_INFO];
/* information about a file being loaded */
struct file_load_info
{
FILE *file; /* input file */
char *buffer; /* line buffer */
int len; /* buffer length */
int line; /* current input line */
char *tmp; /* temp buffer to use while parsing input */
int tmplen; /* length of temp buffer */
};
static void key_dump( struct object *obj, int verbose );
static void key_destroy( struct object *obj );
static const struct object_ops key_ops =
{
sizeof(struct key), /* size */
key_dump, /* dump */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
NULL, /* satisfied */
NULL, /* get_poll_events */
NULL, /* poll_event */
no_read_fd, /* get_read_fd */
no_write_fd, /* get_write_fd */
no_flush, /* flush */
no_get_file_info, /* get_file_info */
key_destroy /* destroy */
};
/*
* The registry text file format v2 used by this code is similar to the one
* used by REGEDIT import/export functionality, with the following differences:
* - strings and key names can contain \x escapes for Unicode
* - key names use escapes too in order to support Unicode
* - the modification time optionally follows the key name
* - REG_EXPAND_SZ and REG_MULTI_SZ are saved as strings instead of hex
*/
static inline char to_hex( char ch )
{
if (isdigit(ch)) return ch - '0';
return tolower(ch) - 'a' + 10;
}
/* dump the full path of a key */
static void dump_path( struct key *key, struct key *base, FILE *f )
{
if (key->parent && key != base)
{
dump_path( key->parent, base, f );
fprintf( f, "\\\\" );
}
if (key->name) dump_strW( key->name, strlenW(key->name), f, "[]" );
else /* root key */
{
int i;
for (i = 0; i < NB_ROOT_KEYS; i++)
if (root_keys[i] == key) fprintf( f, "%s", root_key_names[i] );
}
}
/* dump a value to a text file */
static void dump_value( struct key_value *value, FILE *f )
{
int i, count;
if (value->name[0])
{
fputc( '\"', f );
count = 1 + dump_strW( value->name, strlenW(value->name), f, "\"\"" );
count += fprintf( f, "\"=" );
}
else count = fprintf( f, "@=" );
switch(value->type)
{
case REG_SZ:
case REG_EXPAND_SZ:
case REG_MULTI_SZ:
if (value->type != REG_SZ) fprintf( f, "str(%d):", value->type );
fputc( '\"', f );
if (value->data) dump_strW( (WCHAR *)value->data, value->len / sizeof(WCHAR), f, "\"\"" );
fputc( '\"', f );
break;
case REG_DWORD:
if (value->len == sizeof(DWORD))
{
DWORD dw;
memcpy( &dw, value->data, sizeof(DWORD) );
fprintf( f, "dword:%08lx", dw );
break;
}
/* else fall through */
default:
if (value->type == REG_BINARY) count += fprintf( f, "hex:" );
else count += fprintf( f, "hex(%x):", value->type );
for (i = 0; i < value->len; i++)
{
count += fprintf( f, "%02x", *((unsigned char *)value->data + i) );
if (i < value->len-1)
{
fputc( ',', f );
if (++count > 76)
{
fprintf( f, "\\\n " );
count = 2;
}
}
}
break;
}
fputc( '\n', f );
}
/* save a registry and all its subkeys to a text file */
static void save_subkeys( struct key *key, struct key *base, FILE *f )
{
int i;
if (key->flags & KEY_VOLATILE) return;
/* save key if it has the proper level, and has either some values or no subkeys */
/* keys with no values but subkeys are saved implicitly by saving the subkeys */
if ((key->level >= saving_level) && ((key->last_value >= 0) || (key->last_subkey == -1)))
{
fprintf( f, "\n[" );
dump_path( key, base, f );
fprintf( f, "] %ld\n", key->modif );
for (i = 0; i <= key->last_value; i++) dump_value( &key->values[i], f );
}
for (i = 0; i <= key->last_subkey; i++) save_subkeys( key->subkeys[i], base, f );
}
static void dump_operation( struct key *key, struct key_value *value, const char *op )
{
fprintf( stderr, "%s key ", op );
if (key) dump_path( key, NULL, stderr );
else fprintf( stderr, "ERROR" );
if (value)
{
fprintf( stderr, " value ");
dump_value( value, stderr );
}
else fprintf( stderr, "\n" );
}
static void key_dump( struct object *obj, int verbose )
{
struct key *key = (struct key *)obj;
assert( obj->ops == &key_ops );
fprintf( stderr, "Key flags=%x ", key->flags );
dump_path( key, NULL, stderr );
fprintf( stderr, "\n" );
}
static void key_destroy( struct object *obj )
{
int i;
struct key *key = (struct key *)obj;
assert( obj->ops == &key_ops );
free( key->name );
if (key->class) free( key->class );
for (i = 0; i <= key->last_value; i++)
{
free( key->values[i].name );
if (key->values[i].data) free( key->values[i].data );
}
for (i = 0; i <= key->last_subkey; i++)
{
key->subkeys[i]->parent = NULL;
release_object( key->subkeys[i] );
}
}
/* duplicate a key path from the request buffer */
/* returns a pointer to a static buffer, so only useable once per request */
static WCHAR *copy_path( const path_t path )
{
static WCHAR buffer[MAX_PATH+1];
WCHAR *p = buffer;
while (p < buffer + sizeof(buffer) - 1) if (!(*p++ = *path++)) break;
*p = 0;
return buffer;
}
/* return the next token in a given path */
/* returns a pointer to a static buffer, so only useable once per request */
static WCHAR *get_path_token( const WCHAR *initpath, size_t maxlen )
{
static const WCHAR *path;
static const WCHAR *end;
static WCHAR buffer[MAX_PATH+1];
WCHAR *p = buffer;
if (initpath)
{
path = initpath;
end = path + maxlen / sizeof(WCHAR);
}
while ((path < end) && (*path == '\\')) path++;
while ((path < end) && (p < buffer + sizeof(buffer) - 1))
{
WCHAR ch = *path;
if (!ch || (ch == '\\')) break;
*p++ = ch;
path++;
}
*p = 0;
return buffer;
}
/* duplicate a Unicode string from the request buffer */
static WCHAR *req_strdupW( const void *req, const WCHAR *str )
{
WCHAR *name;
size_t len = get_req_strlenW( req, str );
if ((name = mem_alloc( (len + 1) * sizeof(WCHAR) )) != NULL)
{
memcpy( name, str, len * sizeof(WCHAR) );
name[len] = 0;
}
return name;
}
/* allocate a key object */
static struct key *alloc_key( const WCHAR *name, time_t modif )
{
struct key *key;
if ((key = (struct key *)alloc_object( &key_ops, -1 )))
{
key->name = NULL;
key->class = NULL;
key->flags = 0;
key->last_subkey = -1;
key->nb_subkeys = 0;
key->subkeys = NULL;
key->nb_values = 0;
key->last_value = -1;
key->values = NULL;
key->level = current_level;
key->modif = modif;
key->parent = NULL;
if (name && !(key->name = strdupW( name )))
{
release_object( key );
key = NULL;
}
}
return key;
}
/* update key modification time */
static void touch_key( struct key *key )
{
key->modif = time(NULL);
key->level = max( key->level, current_level );
}
/* try to grow the array of subkeys; return 1 if OK, 0 on error */
static int grow_subkeys( struct key *key )
{
struct key **new_subkeys;
int nb_subkeys;
if (key->nb_subkeys)
{
nb_subkeys = key->nb_subkeys + (key->nb_subkeys / 2); /* grow by 50% */
if (!(new_subkeys = realloc( key->subkeys, nb_subkeys * sizeof(*new_subkeys) )))
{
set_error( STATUS_NO_MEMORY );
return 0;
}
}
else
{
nb_subkeys = MIN_VALUES;
if (!(new_subkeys = mem_alloc( nb_subkeys * sizeof(*new_subkeys) ))) return 0;
}
key->subkeys = new_subkeys;
key->nb_subkeys = nb_subkeys;
return 1;
}
/* allocate a subkey for a given key, and return its index */
static struct key *alloc_subkey( struct key *parent, const WCHAR *name, int index, time_t modif )
{
struct key *key;
int i;
if (parent->last_subkey + 1 == parent->nb_subkeys)
{
/* need to grow the array */
if (!grow_subkeys( parent )) return NULL;
}
if ((key = alloc_key( name, modif )) != NULL)
{
key->parent = parent;
for (i = ++parent->last_subkey; i > index; i--)
parent->subkeys[i] = parent->subkeys[i-1];
parent->subkeys[index] = key;
}
return key;
}
/* free a subkey of a given key */
static void free_subkey( struct key *parent, int index )
{
struct key *key;
int i, nb_subkeys;
assert( index >= 0 );
assert( index <= parent->last_subkey );
key = parent->subkeys[index];
for (i = index; i < parent->last_subkey; i++) parent->subkeys[i] = parent->subkeys[i + 1];
parent->last_subkey--;
key->flags |= KEY_DELETED;
key->parent = NULL;
release_object( key );
/* try to shrink the array */
nb_subkeys = key->nb_subkeys;
if (nb_subkeys > MIN_SUBKEYS && key->last_subkey < nb_subkeys / 2)
{
struct key **new_subkeys;
nb_subkeys -= nb_subkeys / 3; /* shrink by 33% */
if (nb_subkeys < MIN_SUBKEYS) nb_subkeys = MIN_SUBKEYS;
if (!(new_subkeys = realloc( key->subkeys, nb_subkeys * sizeof(*new_subkeys) ))) return;
key->subkeys = new_subkeys;
key->nb_subkeys = nb_subkeys;
}
}
/* find the named child of a given key and return its index */
static struct key *find_subkey( struct key *key, const WCHAR *name, int *index )
{
int i, min, max, res;
min = 0;
max = key->last_subkey;
while (min <= max)
{
i = (min + max) / 2;
if (!(res = strcmpiW( key->subkeys[i]->name, name )))
{
*index = i;
return key->subkeys[i];
}
if (res > 0) max = i - 1;
else min = i + 1;
}
*index = min; /* this is where we should insert it */
return NULL;
}
/* open a subkey */
static struct key *open_key( struct key *key, const WCHAR *name, size_t maxlen )
{
int index;
WCHAR *path;
path = get_path_token( name, maxlen );
while (*path)
{
if (!(key = find_subkey( key, path, &index )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
break;
}
path = get_path_token( NULL, 0 );
}
if (debug_level > 1) dump_operation( key, NULL, "Open" );
if (key) grab_object( key );
return key;
}
/* create a subkey */
static struct key *create_key( struct key *key, const WCHAR *name, size_t maxlen, WCHAR *class,
unsigned int options, time_t modif, int *created )
{
struct key *base;
int base_idx, index, flags = 0;
WCHAR *path;
if (key->flags & KEY_DELETED) /* we cannot create a subkey under a deleted key */
{
set_error( STATUS_KEY_DELETED );
return NULL;
}
if (options & REG_OPTION_VOLATILE) flags |= KEY_VOLATILE;
else if (key->flags & KEY_VOLATILE)
{
set_error( STATUS_CHILD_MUST_BE_VOLATILE );
return NULL;
}
path = get_path_token( name, maxlen );
*created = 0;
while (*path)
{
struct key *subkey;
if (!(subkey = find_subkey( key, path, &index ))) break;
key = subkey;
path = get_path_token( NULL, 0 );
}
/* create the remaining part */
if (!*path) goto done;
*created = 1;
base = key;
base_idx = index;
key = alloc_subkey( key, path, index, modif );
while (key)
{
key->flags |= flags;
path = get_path_token( NULL, 0 );
if (!*path) goto done;
/* we know the index is always 0 in a new key */
key = alloc_subkey( key, path, 0, modif );
}
if (base_idx != -1) free_subkey( base, base_idx );
return NULL;
done:
if (debug_level > 1) dump_operation( key, NULL, "Create" );
if (class) key->class = strdupW(class);
grab_object( key );
return key;
}
/* find a subkey of a given key by its index */
static void enum_key( struct key *parent, int index, WCHAR *name, WCHAR *class, time_t *modif )
{
struct key *key;
if ((index < 0) || (index > parent->last_subkey)) set_error( STATUS_NO_MORE_ENTRIES );
else
{
key = parent->subkeys[index];
*modif = key->modif;
strcpyW( name, key->name );
if (key->class) strcpyW( class, key->class ); /* FIXME: length */
else *class = 0;
if (debug_level > 1) dump_operation( key, NULL, "Enum" );
}
}
/* query information about a key */
static void query_key( struct key *key, struct query_key_info_request *req )
{
int i, len;
int max_subkey = 0, max_class = 0;
int max_value = 0, max_data = 0;
for (i = 0; i <= key->last_subkey; i++)
{
struct key *subkey = key->subkeys[i];
len = strlenW( subkey->name );
if (len > max_subkey) max_subkey = len;
if (!subkey->class) continue;
len = strlenW( subkey->class );
if (len > max_class) max_class = len;
}
for (i = 0; i <= key->last_value; i++)
{
len = strlenW( key->values[i].name );
if (len > max_value) max_value = len;
len = key->values[i].len;
if (len > max_data) max_data = len;
}
req->subkeys = key->last_subkey + 1;
req->max_subkey = max_subkey;
req->max_class = max_class;
req->values = key->last_value + 1;
req->max_value = max_value;
req->max_data = max_data;
req->modif = key->modif;
strcpyW( req->name, key->name);
if (key->class) strcpyW( req->class, key->class ); /* FIXME: length */
else req->class[0] = 0;
if (debug_level > 1) dump_operation( key, NULL, "Query" );
}
/* delete a key and its values */
static void delete_key( struct key *key, const WCHAR *name, size_t maxlen )
{
int index;
struct key *parent;
WCHAR *path;
path = get_path_token( name, maxlen );
if (!*path)
{
/* deleting this key, must find parent and index */
if (key->flags & KEY_ROOT)
{
set_error( STATUS_ACCESS_DENIED );
return;
}
if (!(parent = key->parent) || (key->flags & KEY_DELETED))
{
set_error( STATUS_KEY_DELETED );
return;
}
for (index = 0; index <= parent->last_subkey; index++)
if (parent->subkeys[index] == key) break;
assert( index <= parent->last_subkey );
}
else while (*path)
{
parent = key;
if (!(key = find_subkey( parent, path, &index )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return;
}
path = get_path_token( NULL, 0 );
}
/* we can only delete a key that has no subkeys (FIXME) */
if ((key->flags & KEY_ROOT) || (key->last_subkey >= 0))
{
set_error( STATUS_ACCESS_DENIED );
return;
}
if (debug_level > 1) dump_operation( key, NULL, "Delete" );
free_subkey( parent, index );
touch_key( parent );
}
/* try to grow the array of values; return 1 if OK, 0 on error */
static int grow_values( struct key *key )
{
struct key_value *new_val;
int nb_values;
if (key->nb_values)
{
nb_values = key->nb_values + (key->nb_values / 2); /* grow by 50% */
if (!(new_val = realloc( key->values, nb_values * sizeof(*new_val) )))
{
set_error( STATUS_NO_MEMORY );
return 0;
}
}
else
{
nb_values = MIN_VALUES;
if (!(new_val = mem_alloc( nb_values * sizeof(*new_val) ))) return 0;
}
key->values = new_val;
key->nb_values = nb_values;
return 1;
}
/* find the named value of a given key and return its index in the array */
static struct key_value *find_value( const struct key *key, const WCHAR *name, int *index )
{
int i, min, max, res;
min = 0;
max = key->last_value;
while (min <= max)
{
i = (min + max) / 2;
if (!(res = strcmpiW( key->values[i].name, name )))
{
*index = i;
return &key->values[i];
}
if (res > 0) max = i - 1;
else min = i + 1;
}
*index = min; /* this is where we should insert it */
return NULL;
}
/* insert a new value or return a pointer to an existing one */
static struct key_value *insert_value( struct key *key, const WCHAR *name )
{
struct key_value *value;
WCHAR *new_name;
int i, index;
if (!(value = find_value( key, name, &index )))
{
/* not found, add it */
if (key->last_value + 1 == key->nb_values)
{
if (!grow_values( key )) return NULL;
}
if (!(new_name = strdupW(name))) return NULL;
for (i = ++key->last_value; i > index; i--) key->values[i] = key->values[i - 1];
value = &key->values[index];
value->name = new_name;
value->len = 0;
value->data = NULL;
}
return value;
}
/* set a key value */
static void set_value( struct key *key, WCHAR *name, int type, int datalen, void *data )
{
struct key_value *value;
void *ptr = NULL;
/* first copy the data */
if (datalen)
{
if (!(ptr = mem_alloc( datalen ))) return;
memcpy( ptr, data, datalen );
}
if (!(value = insert_value( key, name )))
{
if (ptr) free( ptr );
return;
}
if (value->data) free( value->data ); /* already existing, free previous data */
value->type = type;
value->len = datalen;
value->data = ptr;
touch_key( key );
if (debug_level > 1) dump_operation( key, value, "Set" );
}
/* get a key value */
static void get_value( struct key *key, WCHAR *name, int *type, int *len, void *data )
{
struct key_value *value;
int index;
if ((value = find_value( key, name, &index )))
{
*type = value->type;
*len = value->len;
if (value->data) memcpy( data, value->data, value->len );
if (debug_level > 1) dump_operation( key, value, "Get" );
}
else
{
*type = -1;
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
}
}
/* enumerate a key value */
static void enum_value( struct key *key, int i, WCHAR *name, int *type, int *len, void *data )
{
struct key_value *value;
if (i < 0 || i > key->last_value) set_error( STATUS_NO_MORE_ENTRIES );
else
{
value = &key->values[i];
strcpyW( name, value->name );
*type = value->type;
*len = value->len;
if (value->data) memcpy( data, value->data, value->len );
if (debug_level > 1) dump_operation( key, value, "Enum" );
}
}
/* delete a value */
static void delete_value( struct key *key, const WCHAR *name )
{
struct key_value *value;
int i, index, nb_values;
if (!(value = find_value( key, name, &index )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return;
}
if (debug_level > 1) dump_operation( key, value, "Delete" );
free( value->name );
if (value->data) free( value->data );
for (i = index; i < key->last_value; i++) key->values[i] = key->values[i + 1];
key->last_value--;
touch_key( key );
/* try to shrink the array */
nb_values = key->nb_values;
if (nb_values > MIN_VALUES && key->last_value < nb_values / 2)
{
struct key_value *new_val;
nb_values -= nb_values / 3; /* shrink by 33% */
if (nb_values < MIN_VALUES) nb_values = MIN_VALUES;
if (!(new_val = realloc( key->values, nb_values * sizeof(*new_val) ))) return;
key->values = new_val;
key->nb_values = nb_values;
}
}
static struct key *get_hkey_obj( int hkey, unsigned int access );
static struct key *create_root_key( int hkey )
{
int dummy;
struct key *key;
switch(hkey)
{
/* the two real root-keys */
case HKEY_LOCAL_MACHINE:
{
static const WCHAR name[] = { 'M','A','C','H','I','N','E',0 };
key = alloc_key( name, time(NULL) );
}
break;
case HKEY_USERS:
{
static const WCHAR name[] = { 'U','S','E','R',0 };
key = alloc_key( name, time(NULL) );
}
break;
/* special subkeys */
case HKEY_CLASSES_ROOT:
{
static const WCHAR name[] =
{ 'S','O','F','T','W','A','R','E','\\','C','l','a','s','s','e','s',0 };
struct key *root = get_hkey_obj( HKEY_LOCAL_MACHINE, 0 );
assert( root );
key = create_key( root, name, sizeof(name), NULL, 0, time(NULL), &dummy );
release_object( root );
}
break;
case HKEY_CURRENT_CONFIG:
{
static const WCHAR name[] = {
'S','Y','S','T','E','M','\\',
'C','U','R','R','E','N','T','C','O','N','T','R','O','L','S','E','T','\\',
'H','A','R','D','W','A','R','E','P','R','O','F','I','L','E','S','\\',
'C','U','R','R','E','N','T',0};
struct key *root = get_hkey_obj( HKEY_LOCAL_MACHINE, 0 );
assert( root );
key = create_key( root, name, sizeof(name), NULL, 0, time(NULL), &dummy );
release_object( root );
}
break;
case HKEY_CURRENT_USER:
{
/* get the current user name */
int i, len;
WCHAR *name;
char buffer[10];
const char *p;
struct passwd *pwd = getpwuid( getuid() );
if (pwd) p = pwd->pw_name;
else
{
sprintf( buffer, "%ld", (long) getuid() );
p = buffer;
}
len = strlen(p);
if ((name = mem_alloc( (len+1) * sizeof(WCHAR) )))
{
struct key *root = get_hkey_obj( HKEY_USERS, 0 );
assert( root );
for (i = 0; i <= len; i++) name[i] = p[i];
key = create_key( root, name, (len+1) * sizeof(WCHAR),
NULL, 0, time(NULL), &dummy );
release_object( root );
free( name );
}
else key = NULL;
}
break;
/* dynamically generated keys */
case HKEY_PERFORMANCE_DATA:
case HKEY_DYN_DATA:
key = alloc_key( NULL, time(NULL) );
break;
default:
key = NULL;
assert(0);
}
if (key)
{
root_keys[hkey - HKEY_ROOT_FIRST] = key;
key->flags |= KEY_ROOT;
}
return key;
}
/* get the registry key corresponding to an hkey handle */
static struct key *get_hkey_obj( int hkey, unsigned int access )
{
struct key *key;
if (IS_ROOT_HKEY(hkey))
{
if (!(key = root_keys[hkey - HKEY_ROOT_FIRST])) key = create_root_key( hkey );
grab_object( key );
}
else
key = (struct key *)get_handle_obj( current->process, hkey, access, &key_ops );
return key;
}
/* read a line from the input file */
static int read_next_line( struct file_load_info *info )
{
char *newbuf;
int newlen, pos = 0;
info->line++;
for (;;)
{
if (!fgets( info->buffer + pos, info->len - pos, info->file ))
return (pos != 0); /* EOF */
pos = strlen(info->buffer);
if (info->buffer[pos-1] == '\n')
{
/* got a full line */
info->buffer[--pos] = 0;
if (pos > 0 && info->buffer[pos-1] == '\r') info->buffer[pos-1] = 0;
return 1;
}
if (pos < info->len - 1) return 1; /* EOF but something was read */
/* need to enlarge the buffer */
newlen = info->len + info->len / 2;
if (!(newbuf = realloc( info->buffer, newlen )))
{
set_error( STATUS_NO_MEMORY );
return -1;
}
info->buffer = newbuf;
info->len = newlen;
}
}
/* make sure the temp buffer holds enough space */
static int get_file_tmp_space( struct file_load_info *info, int size )
{
char *tmp;
if (info->tmplen >= size) return 1;
if (!(tmp = realloc( info->tmp, size )))
{
set_error( STATUS_NO_MEMORY );
return 0;
}
info->tmp = tmp;
info->tmplen = size;
return 1;
}
/* report an error while loading an input file */
static void file_read_error( const char *err, struct file_load_info *info )
{
fprintf( stderr, "Line %d: %s '%s'\n", info->line, err, info->buffer );
}
/* parse an escaped string back into Unicode */
/* return the number of chars read from the input, or -1 on output overflow */
static int parse_strW( WCHAR *dest, int *len, const char *src, char endchar )
{
int count = sizeof(WCHAR); /* for terminating null */
const char *p = src;
while (*p && *p != endchar)
{
if (*p != '\\') *dest = (WCHAR)*p++;
else
{
p++;
switch(*p)
{
case 'a': *dest = '\a'; p++; break;
case 'b': *dest = '\b'; p++; break;
case 'e': *dest = '\e'; p++; break;
case 'f': *dest = '\f'; p++; break;
case 'n': *dest = '\n'; p++; break;
case 'r': *dest = '\r'; p++; break;
case 't': *dest = '\t'; p++; break;
case 'v': *dest = '\v'; p++; break;
case 'x': /* hex escape */
p++;
if (!isxdigit(*p)) *dest = 'x';
else
{
*dest = to_hex(*p++);
if (isxdigit(*p)) *dest = (*dest * 16) + to_hex(*p++);
if (isxdigit(*p)) *dest = (*dest * 16) + to_hex(*p++);
if (isxdigit(*p)) *dest = (*dest * 16) + to_hex(*p++);
}
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7': /* octal escape */
*dest = *p++ - '0';
if (*p >= '0' && *p <= '7') *dest = (*dest * 8) + (*p++ - '0');
if (*p >= '0' && *p <= '7') *dest = (*dest * 8) + (*p++ - '0');
break;
default:
*dest = (WCHAR)*p++;
break;
}
}
if ((count += sizeof(WCHAR)) > *len) return -1; /* dest buffer overflow */
dest++;
}
*dest = 0;
if (!*p) return -1; /* delimiter not found */
*len = count;
return p + 1 - src;
}
/* convert a data type tag to a value type */
static int get_data_type( const char *buffer, int *type, int *parse_type )
{
struct data_type { const char *tag; int len; int type; int parse_type; };
static const struct data_type data_types[] =
{ /* actual type */ /* type to assume for parsing */
{ "\"", 1, REG_SZ, REG_SZ },
{ "str:\"", 5, REG_SZ, REG_SZ },
{ "str(2):\"", 8, REG_EXPAND_SZ, REG_SZ },
{ "str(7):\"", 8, REG_MULTI_SZ, REG_SZ },
{ "hex:", 4, REG_BINARY, REG_BINARY },
{ "dword:", 6, REG_DWORD, REG_DWORD },
{ "hex(", 4, -1, REG_BINARY },
{ NULL, }
};
const struct data_type *ptr;
char *end;
for (ptr = data_types; ptr->tag; ptr++)
{
if (memcmp( ptr->tag, buffer, ptr->len )) continue;
*parse_type = ptr->parse_type;
if ((*type = ptr->type) != -1) return ptr->len;
/* "hex(xx):" is special */
*type = (int)strtoul( buffer + 4, &end, 16 );
if ((end <= buffer) || memcmp( end, "):", 2 )) return 0;
return end + 2 - buffer;
}
return 0;
}
/* load and create a key from the input file */
static struct key *load_key( struct key *base, const char *buffer, struct file_load_info *info )
{
WCHAR *p;
int res, len, modif;
len = strlen(buffer) * sizeof(WCHAR);
if (!get_file_tmp_space( info, len )) return NULL;
if ((res = parse_strW( (WCHAR *)info->tmp, &len, buffer, ']' )) == -1)
{
file_read_error( "Malformed key", info );
return NULL;
}
if (!sscanf( buffer + res, " %d", &modif )) modif = time(NULL);
for (p = (WCHAR *)info->tmp; *p; p++) if (*p == '\\') { p++; break; }
return create_key( base, p, len - ((char *)p - info->tmp), NULL, 0, modif, &res );
}
/* parse a comma-separated list of hex digits */
static int parse_hex( unsigned char *dest, int *len, const char *buffer )
{
const char *p = buffer;
int count = 0;
while (isxdigit(*p))
{
int val;
char buf[3];
memcpy( buf, p, 2 );
buf[2] = 0;
sscanf( buf, "%x", &val );
if (count++ >= *len) return -1; /* dest buffer overflow */
*dest++ = (unsigned char )val;
p += 2;
if (*p == ',') p++;
}
*len = count;
return p - buffer;
}
/* parse a value name and create the corresponding value */
static struct key_value *parse_value_name( struct key *key, const char *buffer, int *len,
struct file_load_info *info )
{
int maxlen = strlen(buffer) * sizeof(WCHAR);
if (!get_file_tmp_space( info, maxlen )) return NULL;
if (buffer[0] == '@')
{
info->tmp[0] = info->tmp[1] = 0;
*len = 1;
}
else
{
if ((*len = parse_strW( (WCHAR *)info->tmp, &maxlen, buffer + 1, '\"' )) == -1) goto error;
(*len)++; /* for initial quote */
}
if (buffer[*len] != '=') goto error;
(*len)++;
return insert_value( key, (WCHAR *)info->tmp );
error:
file_read_error( "Malformed value name", info );
return NULL;
}
/* load a value from the input file */
static int load_value( struct key *key, const char *buffer, struct file_load_info *info )
{
DWORD dw;
void *ptr, *newptr;
int maxlen, len, res;
int type, parse_type;
struct key_value *value;
if (!(value = parse_value_name( key, buffer, &len, info ))) return 0;
if (!(res = get_data_type( buffer + len, &type, &parse_type ))) goto error;
buffer += len + res;
switch(parse_type)
{
case REG_SZ:
len = strlen(buffer) * sizeof(WCHAR);
if (!get_file_tmp_space( info, len )) return 0;
if ((res = parse_strW( (WCHAR *)info->tmp, &len, buffer, '\"' )) == -1) goto error;
ptr = info->tmp;
break;
case REG_DWORD:
dw = strtoul( buffer, NULL, 16 );
ptr = &dw;
len = sizeof(dw);
break;
case REG_BINARY: /* hex digits */
len = 0;
for (;;)
{
maxlen = 1 + strlen(buffer)/3; /* 3 chars for one hex byte */
if (!get_file_tmp_space( info, len + maxlen )) return 0;
if ((res = parse_hex( info->tmp + len, &maxlen, buffer )) == -1) goto error;
len += maxlen;
buffer += res;
while (isspace(*buffer)) buffer++;
if (!*buffer) break;
if (*buffer != '\\') goto error;
if (read_next_line( info) != 1) goto error;
buffer = info->buffer;
while (isspace(*buffer)) buffer++;
}
ptr = info->tmp;
break;
default:
assert(0);
ptr = NULL; /* keep compiler quiet */
break;
}
if (!len) newptr = NULL;
else if (!(newptr = memdup( ptr, len ))) return 0;
if (value->data) free( value->data );
value->data = newptr;
value->len = len;
value->type = type;
/* update the key level but not the modification time */
key->level = max( key->level, current_level );
return 1;
error:
file_read_error( "Malformed value", info );
return 0;
}
/* load all the keys from the input file */
static void load_keys( struct key *key, FILE *f )
{
struct key *subkey = NULL;
struct file_load_info info;
char *p;
info.file = f;
info.len = 4;
info.tmplen = 4;
info.line = 0;
if (!(info.buffer = mem_alloc( info.len ))) return;
if (!(info.tmp = mem_alloc( info.tmplen )))
{
free( info.buffer );
return;
}
if ((read_next_line( &info ) != 1) ||
strcmp( info.buffer, "WINE REGISTRY Version 2" ))
{
set_error( STATUS_NOT_REGISTRY_FILE );
goto done;
}
while (read_next_line( &info ) == 1)
{
for (p = info.buffer; *p && isspace(*p); p++);
switch(*p)
{
case '[': /* new key */
if (subkey) release_object( subkey );
subkey = load_key( key, p + 1, &info );
break;
case '@': /* default value */
case '\"': /* value */
if (subkey) load_value( subkey, p, &info );
else file_read_error( "Value without key", &info );
break;
case '#': /* comment */
case ';': /* comment */
case 0: /* empty line */
break;
default:
file_read_error( "Unrecognized input", &info );
break;
}
}
done:
if (subkey) release_object( subkey );
free( info.buffer );
free( info.tmp );
}
/* load a part of the registry from a file */
static void load_registry( struct key *key, int handle )
{
struct object *obj;
int fd;
if (!(obj = get_handle_obj( current->process, handle, GENERIC_READ, NULL ))) return;
fd = obj->ops->get_read_fd( obj );
release_object( obj );
if (fd != -1)
{
FILE *f = fdopen( fd, "r" );
if (f)
{
load_keys( key, f );
fclose( f );
}
else file_set_error();
}
}
/* update the level of the parents of a key (only needed for the old format) */
static int update_level( struct key *key )
{
int i;
int max = key->level;
for (i = 0; i <= key->last_subkey; i++)
{
int sub = update_level( key->subkeys[i] );
if (sub > max) max = sub;
}
key->level = max;
return max;
}
/* dump a string to a registry save file in the old v1 format */
static void save_string_v1( LPCWSTR str, FILE *f, int len )
{
if (!str) return;
while ((len == -1) ? *str : (*str && len--))
{
if ((*str > 0x7f) || (*str == '\n') || (*str == '='))
fprintf( f, "\\u%04x", *str );
else
{
if (*str == '\\') fputc( '\\', f );
fputc( (char)*str, f );
}
str++;
}
}
/* save a registry and all its subkeys to a text file in the old v1 format */
static void save_subkeys_v1( struct key *key, int nesting, FILE *f )
{
int i, j;
if (key->flags & KEY_VOLATILE) return;
if (key->level < saving_level) return;
for (i = 0; i <= key->last_value; i++)
{
struct key_value *value = &key->values[i];
for (j = nesting; j > 0; j --) fputc( '\t', f );
save_string_v1( value->name, f, -1 );
fprintf( f, "=%d,%d,", value->type, 0 );
if (value->type == REG_SZ || value->type == REG_EXPAND_SZ)
save_string_v1( (LPWSTR)value->data, f, value->len / 2 );
else
for (j = 0; j < value->len; j++)
fprintf( f, "%02x", *((unsigned char *)value->data + j) );
fputc( '\n', f );
}
for (i = 0; i <= key->last_subkey; i++)
{
for (j = nesting; j > 0; j --) fputc( '\t', f );
save_string_v1( key->subkeys[i]->name, f, -1 );
fputc( '\n', f );
save_subkeys_v1( key->subkeys[i], nesting + 1, f );
}
}
/* save a registry branch to a file handle */
static void save_registry( struct key *key, int handle )
{
struct object *obj;
int fd;
if (key->flags & KEY_DELETED)
{
set_error( STATUS_KEY_DELETED );
return;
}
if (!(obj = get_handle_obj( current->process, handle, GENERIC_WRITE, NULL ))) return;
fd = obj->ops->get_write_fd( obj );
release_object( obj );
if (fd != -1)
{
FILE *f = fdopen( fd, "w" );
if (f)
{
fprintf( f, "WINE REGISTRY Version %d\n", saving_version );
if (saving_version == 2) save_subkeys( key, key, f );
else
{
update_level( key );
save_subkeys_v1( key, 0, f );
}
if (fclose( f )) file_set_error();
}
else
{
file_set_error();
close( fd );
}
}
}
/* register a key branch for being saved on exit */
static void register_branch_for_saving( struct key *key, const char *path, size_t len )
{
if (save_branch_count >= MAX_SAVE_BRANCH_INFO)
{
set_error( STATUS_NO_MORE_ENTRIES );
return;
}
if (!(save_branch_info[save_branch_count].path = memdup( path, len+1 ))) return;
save_branch_info[save_branch_count].path[len] = 0;
save_branch_info[save_branch_count].key = (struct key *)grab_object( key );
save_branch_count++;
}
/* save a registry branch to a file */
static int save_branch( struct key *key, const char *path )
{
char *p, *real, *tmp = NULL;
int fd, count = 0, ret = 0;
FILE *f;
/* get the real path */
if (!(real = malloc( PATH_MAX ))) return 0;
if (!realpath( path, real ))
{
free( real );
real = NULL;
}
else path = real;
/* test the file type */
if ((fd = open( path, O_WRONLY )) != -1)
{
struct stat st;
/* if file is not a regular file or has multiple links,
write directly into it; otherwise use a temp file */
if (!fstat( fd, &st ) && (!S_ISREG(st.st_mode) || st.st_nlink > 1))
{
ftruncate( fd, 0 );
goto save;
}
close( fd );
}
/* create a temp file in the same directory */
if (!(tmp = malloc( strlen(path) + 20 ))) goto done;
strcpy( tmp, path );
if ((p = strrchr( tmp, '/' ))) p++;
else p = tmp;
for (;;)
{
sprintf( p, "reg%lx%04x.tmp", (long) getpid(), count++ );
if ((fd = open( tmp, O_CREAT | O_EXCL | O_WRONLY, 0666 )) != -1) break;
if (errno != EEXIST) goto done;
close( fd );
}
/* now save to it */
save:
if (!(f = fdopen( fd, "w" )))
{
if (tmp) unlink( tmp );
close( fd );
goto done;
}
if (debug_level > 1)
{
fprintf( stderr, "%s: ", path );
dump_operation( key, NULL, "saving" );
}
fprintf( f, "WINE REGISTRY Version %d\n", saving_version );
if (saving_version == 2) save_subkeys( key, key, f );
else
{
update_level( key );
save_subkeys_v1( key, 0, f );
}
ret = !fclose(f);
if (tmp)
{
/* if successfully written, rename to final name */
if (ret) ret = !rename( tmp, path );
if (!ret) unlink( tmp );
free( tmp );
}
done:
if (real) free( real );
return ret;
}
/* periodic saving of the registry */
static void periodic_save( void *arg )
{
int i;
for (i = 0; i < save_branch_count; i++)
save_branch( save_branch_info[i].key, save_branch_info[i].path );
add_timeout( &next_save_time, save_period );
save_timeout_user = add_timeout_user( &next_save_time, periodic_save, 0 );
}
/* save the registry and close the top-level keys; used on server exit */
void close_registry(void)
{
int i;
for (i = 0; i < save_branch_count; i++)
{
if (!save_branch( save_branch_info[i].key, save_branch_info[i].path ))
{
fprintf( stderr, "wineserver: could not save registry branch to %s",
save_branch_info[i].path );
perror( " " );
}
release_object( save_branch_info[i].key );
}
for (i = 0; i < NB_ROOT_KEYS; i++)
{
if (root_keys[i]) release_object( root_keys[i] );
}
}
/* create a registry key */
DECL_HANDLER(create_key)
{
struct key *key, *parent;
WCHAR *class;
unsigned int access = req->access;
if (access & MAXIMUM_ALLOWED) access = KEY_ALL_ACCESS; /* FIXME: needs general solution */
req->hkey = -1;
if ((parent = get_hkey_obj( req->parent, 0 /*FIXME*/ )))
{
if ((class = req_strdupW( req, req->class )))
{
if ((key = create_key( parent, req->name, sizeof(req->name), class, req->options,
req->modif, &req->created )))
{
req->hkey = alloc_handle( current->process, key, access, 0 );
release_object( key );
}
free( class );
}
release_object( parent );
}
}
/* open a registry key */
DECL_HANDLER(open_key)
{
struct key *key, *parent;
unsigned int access = req->access;
if (access & MAXIMUM_ALLOWED) access = KEY_ALL_ACCESS; /* FIXME: needs general solution */
req->hkey = -1;
if ((parent = get_hkey_obj( req->parent, 0 /*FIXME*/ )))
{
if ((key = open_key( parent, req->name, sizeof(req->name) )))
{
req->hkey = alloc_handle( current->process, key, access, 0 );
release_object( key );
}
release_object( parent );
}
}
/* delete a registry key */
DECL_HANDLER(delete_key)
{
struct key *key;
if ((key = get_hkey_obj( req->hkey, 0 /*FIXME*/ )))
{
delete_key( key, req->name, sizeof(req->name) );
release_object( key );
}
}
/* close a registry key */
DECL_HANDLER(close_key)
{
int hkey = req->hkey;
/* ignore attempts to close a root key */
if (!IS_ROOT_HKEY(hkey)) close_handle( current->process, hkey );
}
/* enumerate registry subkeys */
DECL_HANDLER(enum_key)
{
struct key *key;
req->name[0] = req->class[0] = 0;
if ((key = get_hkey_obj( req->hkey, KEY_ENUMERATE_SUB_KEYS )))
{
enum_key( key, req->index, req->name, req->class, &req->modif );
release_object( key );
}
}
/* query information about a registry key */
DECL_HANDLER(query_key_info)
{
struct key *key;
req->name[0] = req->class[0] = 0;
if ((key = get_hkey_obj( req->hkey, KEY_QUERY_VALUE )))
{
query_key( key, req );
release_object( key );
}
}
/* set a value of a registry key */
DECL_HANDLER(set_key_value)
{
struct key *key;
int max = get_req_size( req, req->data, sizeof(req->data[0]) );
int datalen = req->len;
if (datalen > max)
{
set_error( STATUS_NO_MEMORY ); /* FIXME */
return;
}
if ((key = get_hkey_obj( req->hkey, KEY_SET_VALUE )))
{
set_value( key, copy_path( req->name ), req->type, datalen, req->data );
release_object( key );
}
}
/* retrieve the value of a registry key */
DECL_HANDLER(get_key_value)
{
struct key *key;
req->len = 0;
if ((key = get_hkey_obj( req->hkey, KEY_QUERY_VALUE )))
{
get_value( key, copy_path( req->name ), &req->type, &req->len, req->data );
release_object( key );
}
}
/* enumerate the value of a registry key */
DECL_HANDLER(enum_key_value)
{
struct key *key;
req->len = 0;
req->name[0] = 0;
if ((key = get_hkey_obj( req->hkey, KEY_QUERY_VALUE )))
{
enum_value( key, req->index, req->name, &req->type, &req->len, req->data );
release_object( key );
}
}
/* delete a value of a registry key */
DECL_HANDLER(delete_key_value)
{
WCHAR *name;
struct key *key;
if ((key = get_hkey_obj( req->hkey, KEY_SET_VALUE )))
{
if ((name = req_strdupW( req, req->name )))
{
delete_value( key, name );
free( name );
}
release_object( key );
}
}
/* load a registry branch from a file */
DECL_HANDLER(load_registry)
{
struct key *key;
if ((key = get_hkey_obj( req->hkey, KEY_SET_VALUE | KEY_CREATE_SUB_KEY )))
{
/* FIXME: use subkey name */
load_registry( key, req->file );
release_object( key );
}
}
/* save a registry branch to a file */
DECL_HANDLER(save_registry)
{
struct key *key;
if ((key = get_hkey_obj( req->hkey, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS )))
{
save_registry( key, req->file );
release_object( key );
}
}
/* set the current and saving level for the registry */
DECL_HANDLER(set_registry_levels)
{
current_level = req->current;
saving_level = req->saving;
saving_version = req->version;
/* set periodic save timer */
if (save_timeout_user)
{
remove_timeout_user( save_timeout_user );
save_timeout_user = NULL;
}
if ((save_period = req->period))
{
if (save_period < 10000) save_period = 10000; /* limit rate */
gettimeofday( &next_save_time, 0 );
add_timeout( &next_save_time, save_period );
save_timeout_user = add_timeout_user( &next_save_time, periodic_save, 0 );
}
}
/* save a registry branch at server exit */
DECL_HANDLER(save_registry_atexit)
{
struct key *key;
if ((key = get_hkey_obj( req->hkey, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS )))
{
register_branch_for_saving( key, req->file, get_req_strlen( req, req->file ) );
release_object( key );
}
}
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