Locking based on fcntl instead of flock.

[idzebra-moved-to-github.git] / index / main.c

diff --git a/index/main.c b/index/main.c
index 574c212..a3fb510 100644 (file)
--- a/index/main.c
+++ b/index/main.c
@@ -4,7 +4,20 @@
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: main.c,v $
- * Revision 1.26  1995-12-06 12:41:23  adam
+ * Revision 1.29  1995-12-11 11:43:30  adam
+ * Locking based on fcntl instead of flock.
+ * Setting commitEnable removed. Command line option -n can be used to
+ * prevent commit if commit setting is defined in the configuration file.
+ *
+ * Revision 1.28  1995/12/08  16:22:56  adam
+ * Work on update while servers are running. Three lock files introduced.
+ * The servers reload their registers when necessary, but they don't
+ * reestablish result sets yet.
+ *
+ * Revision 1.27  1995/12/07  17:38:47  adam
+ * Work locking mechanisms for concurrent updates/commit.
+ *
+ * Revision 1.26  1995/12/06  12:41:23  adam
  * New command 'stat' for the index program.
  * Filenames can be read from stdin by specifying '-'.
  * Bug fix/enhancement of the transformation from terms to regular
@@ -115,6 +128,7 @@ int main (int argc, char **argv)
     char *arg;
     char *configName = NULL;
     int nsections;
+    int disableCommit = 0;
 
     struct recordGroup rGroupDef;
     
@@ -140,18 +154,19 @@ int main (int argc, char **argv)
        " -g <group>    Index files according to group settings.\n"
        " -d <database> Records belong to Z39.50 database <database>.\n"
        " -m <mbytes>   Use <mbytes> before flushing keys to disk.\n"
+        " -n            Don't use commit system\n"
        " -v <level>    Set logging to <level>.\n");
         exit (1);
     }
-    while ((ret = options ("t:c:g:d:m:v:", argv, argc, &arg)) != -2)
+    while ((ret = options ("t:c:g:d:m:v:n", argv, argc, &arg)) != -2)
     {
         if (ret == 0)
         {
+            const char *rval;
             if(cmd == 0) /* command */
             {
                 if (!common_resource)
                 {
-                    const char *rval;
                     common_resource = res_open (configName ?
                                                 configName : FNAME_CONFIG);
                     if (!common_resource)
@@ -161,9 +176,6 @@ int main (int argc, char **argv)
                         exit (1);
                     }
                     data1_tabpath = res_get (common_resource, "profilePath");
-                    rval = res_get (common_resource, "commitEnable");
-                    if (rval && atoi(rval))
-                        bf_cache ();
                 }
                 if (!strcmp (arg, "update"))
                     cmd = 'u';
@@ -171,11 +183,47 @@ int main (int argc, char **argv)
                     cmd = 'd';
                 else if (!strcmp (arg, "commit"))
                 {
-                    logf (LOG_LOG, "Commit");
-                    bf_commit ();
+                    zebraIndexLock (1);
+                    rval = res_get (common_resource, "commit");
+                    if (rval && *rval)
+                        bf_cache (1);
+                    else
+                    {
+                        logf (LOG_FATAL, "Cannot perform commit");
+                        logf (LOG_FATAL, "No commit area defined "
+                              "in the configuration file");
+                        exit (1);
+                    }
+                    if (bf_commitExists ())
+                    {
+                        logf (LOG_LOG, "Commit start");
+                        zebraIndexLockMsg ("c");
+                        zebraIndexWait (1);
+                        logf (LOG_LOG, "Commit execute");
+                        bf_commitExec ();
+                        zebraIndexLockMsg ("d");
+                        zebraIndexWait (0);
+                        logf (LOG_LOG, "Commit clean");
+                        bf_commitClean ();
+                    }
+                    else
+                        logf (LOG_LOG, "Nothing to commit");
                 }
                 else if (!strcmp (arg, "stat") || !strcmp (arg, "status"))
                 {
+                    zebraIndexLock (0);
+                    bf_cache (0);
+                    rec_prstat ();
+                }
+                else if (!strcmp (arg, "cstat") || !strcmp (arg, "cstatus"))
+                {
+                    zebraIndexLock (1);
+                    rval = res_get (common_resource, "commit");
+                    if (rval && *rval)
+                    {
+                        bf_cache (1);
+                        zebraIndexLockMsg ("r");
+                    }
                     rec_prstat ();
                 }
                 else
@@ -188,6 +236,20 @@ int main (int argc, char **argv)
             {
                 struct recordGroup rGroup;
 
+                zebraIndexLock (0);
+                rval = res_get (common_resource, "commit");
+                if (rval && *rval && !disableCommit)
+                {
+                    bf_cache (1);
+                    zebraIndexLockMsg ("r");
+                }
+                else
+                {
+                    bf_cache (0);
+                    zebraIndexLockMsg ("w");
+                }
+                zebraIndexWait (0);
+
                 memcpy (&rGroup, &rGroupDef, sizeof(rGroup));
                 key_open (mem_max);
                 rGroup.path = arg;
@@ -231,12 +293,15 @@ int main (int argc, char **argv)
             configName = arg;
         else if (ret == 't')
             rGroupDef.recordType = arg;
+        else if (ret == 'n')
+            disableCommit = 1;
         else
         {
             logf (LOG_FATAL, "Unknown option '-%s'", arg);
             exit (1);
         }
     }
+    zebraIndexUnlock ();
     exit (0);
 }