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server: Store modification time as a key comment to avoid losing precision.

This commit is contained in:
Alexandre Julliard 2015-08-18 18:11:32 +09:00
parent d2890778f9
commit 1baf01fc24
1 changed files with 41 additions and 8 deletions
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49
server/registry.c
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@ -265,6 +265,7 @@ static void save_subkeys( const struct key *key, const struct key *base, FILE *f
fprintf( f, "\n[" );
if (key != base) dump_path( key, base, f );
fprintf( f, "] %u\n", (unsigned int)((key->modif - ticks_1601_to_1970) / TICKS_PER_SEC) );
fprintf( f, "#time=%x%08x\n", (unsigned int)(key->modif >> 32), (unsigned int)key->modif );
if (key->class)
{
fprintf( f, "#class=\"" );
@ -1341,14 +1342,13 @@ static int get_data_type( const char *buffer, int *type, int *parse_type )
}
/* load and create a key from the input file */
static struct key *load_key( struct key *base, const char *buffer,
int prefix_len, struct file_load_info *info )
static struct key *load_key( struct key *base, const char *buffer, int prefix_len,
struct file_load_info *info, timeout_t *modif )
{
WCHAR *p;
struct unicode_str name;
int res;
unsigned int mod;
timeout_t modif = current_time;
data_size_t len;
if (!get_file_tmp_space( info, strlen(buffer) * sizeof(WCHAR) )) return NULL;
@ -1360,7 +1360,9 @@ static struct key *load_key( struct key *base, const char *buffer,
return NULL;
}
if (sscanf( buffer + res, " %u", &mod ) == 1)
modif = (timeout_t)mod * TICKS_PER_SEC + ticks_1601_to_1970;
*modif = (timeout_t)mod * TICKS_PER_SEC + ticks_1601_to_1970;
else
*modif = current_time;
p = info->tmp;
while (prefix_len && *p) { if (*p++ == '\\') prefix_len--; }
@ -1377,7 +1379,17 @@ static struct key *load_key( struct key *base, const char *buffer,
}
name.str = p;
name.len = len - (p - info->tmp + 1) * sizeof(WCHAR);
return create_key_recursive( base, &name, modif );
return create_key_recursive( base, &name, 0 );
}
/* update the modification time of a key (and its parents) after it has been loaded from a file */
static void update_key_time( struct key *key, timeout_t modif )
{
while (key && !key->modif)
{
key->modif = modif;
key = key->parent;
}
}
/* load a global option from the input file */
@ -1415,6 +1427,18 @@ static int load_key_option( struct key *key, const char *buffer, struct file_loa
const char *p;
data_size_t len;
if (!strncmp( buffer, "#time=", 6 ))
{
timeout_t modif = 0;
for (p = buffer + 6; *p; p++)
{
if (*p >= '0' && *p <= '9') modif = (modif << 4) | (*p - '0');
else if (*p >= 'A' && *p <= 'F') modif = (modif << 4) | (*p - 'A' + 10);
else if (*p >= 'a' && *p <= 'f') modif = (modif << 4) | (*p - 'a' + 10);
else break;
}
update_key_time( key, modif );
}
if (!strncmp( buffer, "#class=", 7 ))
{
p = buffer + 7;
@ -1589,6 +1613,7 @@ static void load_keys( struct key *key, const char *filename, FILE *f, int prefi
{
struct key *subkey = NULL;
struct file_load_info info;
timeout_t modif = current_time;
char *p;
info.filename = filename;
@ -1617,9 +1642,13 @@ static void load_keys( struct key *key, const char *filename, FILE *f, int prefi
switch(*p)
{
case '[': /* new key */
if (subkey) release_object( subkey );
if (subkey)
{
update_key_time( subkey, modif );
release_object( subkey );
}
if (prefix_len == -1) prefix_len = get_prefix_len( key, p + 1, &info );
if (!(subkey = load_key( key, p + 1, prefix_len, &info )))
if (!(subkey = load_key( key, p + 1, prefix_len, &info, &modif )))
file_read_error( "Error creating key", &info );
break;
case '@': /* default value */
@ -1641,7 +1670,11 @@ static void load_keys( struct key *key, const char *filename, FILE *f, int prefi
}
done:
if (subkey) release_object( subkey );
if (subkey)
{
update_key_time( subkey, modif );
release_object( subkey );
}
free( info.buffer );
free( info.tmp );
}