Module: wine Branch: master Commit: b79ff648ef6b18ac49c87571a3f78f731af78d25 URL: https://source.winehq.org/git/wine.git/?a=commit;h=b79ff648ef6b18ac49c87571a...
Author: Alexandre Julliard julliard@winehq.org Date: Thu Jul 7 11:52:59 2022 +0200
server: Implement lookup_name() for registry keys.
Signed-off-by: Alexandre Julliard julliard@winehq.org
---
server/registry.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 86 insertions(+), 1 deletion(-)
diff --git a/server/registry.c b/server/registry.c index 2c52ec85d29..f800bcd842c 100644 --- a/server/registry.c +++ b/server/registry.c @@ -164,6 +164,8 @@ static void key_dump( struct object *obj, int verbose ); static unsigned int key_map_access( struct object *obj, unsigned int access ); static struct security_descriptor *key_get_sd( struct object *obj ); static WCHAR *key_get_full_name( struct object *obj, data_size_t *len ); +static struct object *key_lookup_name( struct object *obj, struct unicode_str *name, + unsigned int attr, struct object *root ); static int key_link_name( struct object *obj, struct object_name *name, struct object *parent ); static void key_unlink_name( struct object *obj, struct object_name *name ); static int key_close_handle( struct object *obj, struct process *process, obj_handle_t handle ); @@ -184,7 +186,7 @@ static const struct object_ops key_ops = key_get_sd, /* get_sd */ default_set_sd, /* set_sd */ key_get_full_name, /* get_full_name */ - no_lookup_name, /* lookup_name */ + key_lookup_name, /* lookup_name */ key_link_name, /* link_name */ key_unlink_name, /* unlink_name */ no_open_file, /* open_file */ @@ -485,6 +487,89 @@ static WCHAR *key_get_full_name( struct object *obj, data_size_t *ret_len ) return (WCHAR *)ret; }
+static struct object *key_lookup_name( struct object *obj, struct unicode_str *name, + unsigned int attr, struct object *root ) +{ + struct key *found, *key = (struct key *)obj; + struct unicode_str tmp; + data_size_t next; + int index; + + assert( obj->ops == &key_ops ); + + if (!name) return NULL; /* open the key itself */ + + if (key->flags & KEY_DELETED) + { + set_error( STATUS_KEY_DELETED ); + return NULL; + } + + if (key->flags & KEY_SYMLINK) + { + struct unicode_str name_left; + struct key_value *value; + + if (!name->len && (attr & OBJ_OPENLINK)) return NULL; + + if (!(value = find_value( key, &symlink_str, &index )) || + value->len < sizeof(WCHAR) || *(WCHAR *)value->data != '\') + { + set_error( STATUS_OBJECT_NAME_NOT_FOUND ); + return NULL; + } + tmp.str = value->data; + tmp.len = (value->len / sizeof(WCHAR)) * sizeof(WCHAR); + if ((obj = lookup_named_object( NULL, &tmp, OBJ_CASE_INSENSITIVE, &name_left ))) + { + if (!name->len) *name = name_left; /* symlink destination can be created if missing */ + else if (name_left.len) /* symlink must have been resolved completely */ + { + release_object( obj ); + obj = NULL; + set_error( STATUS_OBJECT_NAME_NOT_FOUND ); + } + } + return obj; + } + + if (!name->str) return NULL; + + tmp.str = name->str; + tmp.len = get_path_element( name->str, name->len ); + + if (tmp.len > MAX_NAME_LEN * sizeof(WCHAR)) + { + set_error( STATUS_INVALID_PARAMETER ); + return 0; + } + + /* skip trailing backslashes */ + for (next = tmp.len; next < name->len; next += sizeof(WCHAR)) + if (name->str[next / sizeof(WCHAR)] != '\') break; + + if (!(found = find_subkey( key, &tmp, &index ))) + { + if (next < name->len) /* path still has elements */ + set_error( STATUS_OBJECT_NAME_NOT_FOUND ); + else /* only trailing backslashes */ + name->len = tmp.len; + return NULL; + } + + if (next < name->len) /* move to the next element */ + { + name->str += next / sizeof(WCHAR); + name->len -= next; + } + else + { + name->str = NULL; + name->len = 0; + } + return grab_object( found ); +} + static int key_link_name( struct object *obj, struct object_name *name, struct object *parent ) { struct key *key = (struct key *)obj;
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Alexandre Julliard