X-Git-Url: https://git.distorted.org.uk/~mdw/disorder/blobdiff_plain/566145652162e02433c1cd461bf9b5e312abbc40..7378b5081fde6f48140327d5c072a8231934f027:/lib/trackdb.c

diff --git a/lib/trackdb.c b/lib/trackdb.c
index 6a93fba..53d7cf3 100644
--- a/lib/trackdb.c
+++ b/lib/trackdb.c
@@ -162,6 +162,16 @@ static int compare(DB attribute((unused)) *db_,
   return compare_path_raw(a->data, a->size, b->data, b->size);
 }
 
+/** @brief Test whether the track database can be read
+ * @return 1 if it can, 0 if it cannot
+ */
+int trackdb_readable(void) {
+  char *usersdb;
+
+  byte_xasprintf(&usersdb, "%s/users.db", config->home);
+  return access(usersdb, R_OK) == 0;
+}
+
 /** @brief Open database environment
  * @param flags Flags word
  *
@@ -2630,10 +2640,13 @@ int trackdb_edituserinfo(const char *user,
       return -1;
     }
   } else if(!strcmp(key, "email")) {
-    if(!strchr(value, '@')) {
-      error(0, "invalid email address '%s' for user '%s'", user, value);
-      return -1;
-    }
+    if(*value) {
+      if(!strchr(value, '@')) {
+        error(0, "invalid email address '%s' for user '%s'", user, value);
+        return -1;
+      }
+    } else
+      value = 0;                        /* no email -> remove key */
   } else if(!strcmp(key, "created")) {
     error(0, "cannot change creation date for user '%s'", user);
     return -1;