static void
check_guards (void *free_block,
dbus_bool_t overwrite)
{
if (free_block != NULL)
{
unsigned char *block = ((unsigned char*)free_block) - GUARD_START_OFFSET;
size_t requested_bytes = *(dbus_uint32_t*)block;
BlockSource source = *(dbus_uint32_t*)(block + 4);
unsigned int i;
dbus_bool_t failed;
failed = FALSE;
#if 0
_dbus_verbose ("Checking %d bytes request from source %s\n",
requested_bytes, source_string (source));
#endif
i = GUARD_INFO_SIZE;
while (i < GUARD_START_OFFSET)
{
dbus_uint32_t value = *(dbus_uint32_t*) &block[i];
if (value != GUARD_VALUE)
{
_dbus_warn ("Block of %lu bytes from %s had start guard value 0x%ux at %d expected 0x%x\n",
(long) requested_bytes, source_string (source),
value, i, GUARD_VALUE);
failed = TRUE;
}
i += 4;
}
i = GUARD_START_OFFSET + requested_bytes;
while (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
{
dbus_uint32_t value = *(dbus_uint32_t*) &block[i];
if (value != GUARD_VALUE)
{
_dbus_warn ("Block of %lu bytes from %s had end guard value 0x%ux at %d expected 0x%x\n",
(long) requested_bytes, source_string (source),
value, i, GUARD_VALUE);
failed = TRUE;
}
i += 4;
}
/* set memory to anything but nul bytes */
if (overwrite)
memset (free_block, 'g', requested_bytes);
if (failed)
_dbus_assert_not_reached ("guard value corruption");
}
}
static int dconfirm(directive_t * d)
{
source_t * src;
if (d->values[0] == NULL) return 0;
d->nd = new_dir(d->values[0], d->par);
confirm_common(d);
if (d->values[1] != NULL) {
src = source_string(d->values[1]);
d->nd = parse_directory(src, d->nd);
free(src);
}
return 1;
}