Function dav_fs_save_lock_record

modules/dav/fs/lock.c:414–509

** dav_fs_save_lock_record: Saves the lock information specified in the ** direct and indirect lock lists about path into the lock database. ** If direct and indirect == NULL, the key is removed. */

**    If direct and indirect == NULL, the key is removed.
*/
static dav_error * dav_fs_save_lock_record(dav_lockdb *lockdb, apr_datum_t key,
                                           dav_lock_discovery *direct,
                                           dav_lock_indirect *indirect)
{
    dav_error *err;
    apr_datum_t val = { 0 };
    char *ptr;
    dav_lock_discovery *dp = direct;
    dav_lock_indirect *ip = indirect;

#if DAV_DEBUG
    if (lockdb->ro) {
        return dav_new_error(lockdb->info->pool,
                             HTTP_INTERNAL_SERVER_ERROR, 0, 0,
                             "INTERNAL DESIGN ERROR: the lockdb was opened "
                             "readonly, but an attempt to save locks was "
                             "performed.");
    }
#endif

    if ((err = dav_fs_really_open_lockdb(lockdb)) != NULL) {
        /* ### add a higher-level error? */
        return err;
    }

    /* If nothing to save, delete key */
    if (dp == NULL && ip == NULL) {
        /* don't fail if the key is not present */
        /* ### but what about other errors? */
        (void) dav_dbm_delete(lockdb->info->db, key);
        return NULL;
    }

    while(dp) {
        val.dsize += dav_size_direct(dp);
        dp = dp->next;
    }
    while(ip) {
        val.dsize += dav_size_indirect(ip);
        ip = ip->next;
    }

    /* ### can this be apr_palloc() ? */
    /* ### hmmm.... investigate the use of a buffer here */
    ptr = val.dptr = apr_pcalloc(lockdb->info->pool, val.dsize);
    dp  = direct;
    ip  = indirect;

    while(dp) {
        *ptr++ = DAV_LOCK_DIRECT;   /* Direct lock - lock_discovery struct follows */
        memcpy(ptr, dp, sizeof(dp->f));   /* Fixed portion of struct */
        ptr += sizeof(dp->f);
        memcpy(ptr, dp->locktoken, sizeof(*dp->locktoken));
        ptr += sizeof(*dp->locktoken);
        if (dp->owner == NULL) {
            *ptr++ = '\0';
        }
        else {