Do not fatal-error when deleting a global pref that does not exist.

[disorder] / lib / trackdb.c

diff --git a/lib/trackdb.c b/lib/trackdb.c
index d2ebe070687dc187d657e8f59af42687634fe294..4afd9257929960eb168fb921d383a906a2968fd5 100644 (file)
--- a/lib/trackdb.c
+++ b/lib/trackdb.c
@@ -59,6 +59,7 @@
 #include "unidata.h"
 #include "base64.h"
 #include "sendmail.h"
+#include "validity.h"
 
 #define RESCAN "disorder-rescan"
 #define DEADLOCK "disorder-deadlock"
@@ -839,7 +840,7 @@ static char **dedupe(char **vec, int nvec) {
   int m, n;
 
   qsort(vec, nvec, sizeof (char *), wordcmp);
-  m = n = 0;
+  m = 0;
   if(nvec) {
     vec[m++] = vec[0];
     for(n = 1; n < nvec; ++n)
@@ -1822,7 +1823,7 @@ int trackdb_set(const char *track,
         if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
           goto fail;
       /* compute the new alias name */
-      if((err = compute_alias(&newalias, track, p, tid))) goto fail;
+      if(compute_alias(&newalias, track, p, tid)) goto fail;
       /* check whether alias has changed */
       if(!(oldalias == newalias
            || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
@@ -2175,13 +2176,13 @@ const char *trackdb_getpart(const char *track,
   DB_TXN *tid;
   char *pref;
   const char *actual;
-  int used_db, err;
+  int used_db;
 
   /* construct the full pref */
   byte_xasprintf(&pref, "trackname_%s_%s", context, part);
   for(;;) {
     tid = trackdb_begin_transaction();
-    if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
+    if(gettrackdata(track, 0, &p, &actual, 0, tid) == DB_LOCK_DEADLOCK)
       goto fail;
     break;
 fail:
@@ -2492,6 +2493,9 @@ char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
     }
     if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
     cursor = 0;
+    if(err)
+      goto fail;
+    cursor = 0;
     /* do a naive search over that (hopefuly fairly small) list of tracks */
     u.nvec = 0;
     for(n = 0; n < v.nvec; ++n) {
@@ -2732,17 +2736,18 @@ int trackdb_rescan_underway(void) {
  * @param name Global preference name
  * @param value New value
  * @param who Who is setting it
+ * @return 0 on success, -1 on error
  */
-void trackdb_set_global(const char *name,
+int trackdb_set_global(const char *name,
                         const char *value,
                         const char *who) {
   DB_TXN *tid;
-  int err;
-  int state;
+  int state, err;
 
   for(;;) {
     tid = trackdb_begin_transaction();
-    if(!(err = trackdb_set_global_tid(name, value, tid)))
+    err = trackdb_set_global_tid(name, value, tid);
+    if(err != DB_LOCK_DEADLOCK)
       break;
     trackdb_abort_transaction(tid);
   }
@@ -2762,6 +2767,8 @@ void trackdb_set_global(const char *name,
                   who ? who : "-");
     eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
   }
+  eventlog("global_pref", name, value, (char *)0);
+  return err == 0 ? 0 : -1;
 }
 
 /** @brief Set a global preference
@@ -2787,7 +2794,7 @@ int trackdb_set_global_tid(const char *name,
     err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
   else
     err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
-  if(err == DB_LOCK_DEADLOCK) return err;
+  if(err == DB_LOCK_DEADLOCK || err == DB_NOTFOUND) return err;
   if(err)
     disorder_fatal(0, "error updating database: %s", db_strerror(err));
   return 0;
@@ -2799,12 +2806,11 @@ int trackdb_set_global_tid(const char *name,
  */
 const char *trackdb_get_global(const char *name) {
   DB_TXN *tid;
-  int err;
   const char *r;
 
   for(;;) {
     tid = trackdb_begin_transaction();
-    if(!(err = trackdb_get_global_tid(name, tid, &r)))
+    if(!trackdb_get_global_tid(name, tid, &r))
       break;
     trackdb_abort_transaction(tid);
   }
@@ -2908,7 +2914,7 @@ static char **trackdb_new_tid(int *ntracksp,
   default:
     disorder_fatal(0, "error reading noticed.db: %s", db_strerror(err));
   }
-  if((err = trackdb_closecursor(c)))
+  if(trackdb_closecursor(c))
     return 0;                           /* deadlock */
   vector_terminate(tracks);
   if(ntracksp)
@@ -3013,32 +3019,6 @@ static int trusted(const char *user) {
   return n < config->trust.n;
 }
 
-/** @brief Return non-zero for a valid username
- * @param user Candidate username
- * @return Nonzero if it's valid
- *
- * Currently we only allow the letters and digits in ASCII.  We could be more
- * liberal than this but it is a nice simple test.  It is critical that
- * semicolons are never allowed.
- *
- * NB also used by playlist_parse_name() to validate playlist names!
- */
-int valid_username(const char *user) {
-  if(!*user)
-    return 0;
-  while(*user) {
-    const uint8_t c = *user++;
-    /* For now we are very strict */
-    if((c >= 'a' && c <= 'z')
-       || (c >= 'A' && c <= 'Z')
-       || (c >= '0' && c <= '9'))
-      /* ok */;
-    else
-      return 0;
-  }
-  return 1;
-}
-
 /** @brief Add a user
  * @param user Username
  * @param password Initial password or NULL