From f109f4412245d98b9a2c9e309cf44fb2ae1243c8 Mon Sep 17 00:00:00 2001
From: Adam Dickmeiss <adam@indexdata.dk>
Date: Fri, 19 May 1995 14:51:06 +0000
Subject: [PATCH] Bug fix: stopped kernels sometimes got IPC messages from the
 monitor.

---
 kernel/monitor.c |   19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/kernel/monitor.c b/kernel/monitor.c
index 8982094..3ed0cc6 100644
--- a/kernel/monitor.c
+++ b/kernel/monitor.c
@@ -45,7 +45,10 @@
  * Europagate, 1995
  *
  * $Log: monitor.c,v $
- * Revision 1.11  1995/05/19 13:26:00  adam
+ * Revision 1.12  1995/05/19 14:51:06  adam
+ * Bug fix: stopped kernels sometimes got IPC messages from the monitor.
+ *
+ * Revision 1.11  1995/05/19  13:26:00  adam
  * Bug fixes. Better command line options.
  *
  * Revision 1.10  1995/05/18  12:03:09  adam
@@ -143,6 +146,7 @@ static void reread_resources (void)
 
 struct ke_info {
     int id;                     /* email user-id */
+    int stopped;                /* stop flag */
     pid_t pid;                  /* pid of email kernel child */
     GIP gip;                    /* fifo information */
     struct str_queue *queue;    /* message queue */
@@ -170,6 +174,7 @@ struct ke_info *ke_info_add (int id)
     (*kip)->id = id;
     (*kip)->gip = NULL;
     (*kip)->queue = NULL;
+    (*kip)->stopped = 0;
     return *kip;
 }
 
@@ -361,7 +366,10 @@ static int deliver (int argc, char **argv, int id, struct str_queue *queue,
     }
     index = 0;                         /* transfer. may be interrupted */
     while ((msg = str_queue_get (queue, index++)))
+    {
+        gw_log (GW_LOG_DEBUG, module, "deliver: %s", msg);
         gip_wline (*gip, msg);
+    }
     signal (SIGPIPE, oldsig);
     return pass;                       /* successful transfer */
 }
@@ -416,7 +424,7 @@ static void monitor_events (int argc, char **argv)
             too_many = 0;
             for (ki = ke_info_list; ki; ki = ki->next)
             {
-                if (!ki->queue)
+                if (!ki->queue || ki->stopped)
                     continue;
                 gw_log (GW_LOG_DEBUG, module, "Transfer mail to %d", ki->id);
                 r = deliver (argc, argv, ki->id, ki->queue, &ki->gip, &ki->pid,
@@ -431,14 +439,13 @@ static void monitor_events (int argc, char **argv)
                 if (r == 0)             /* too many pending? */
                     too_many++;
             }
-#if 0
             if (too_many)
             {
                 gw_log (GW_LOG_DEBUG, module, "%d too many pending",
                         too_many);
                 for (ki = ke_info_list; ki; ki = ki->next)
                 {
-                    if (!ki->queue && ki->pid != -1)
+                    if (!ki->queue && ki->pid != -1 && !ki->stopped)
                     {
                         if (!(ki->queue = str_queue_mk ()))
                         {
@@ -454,11 +461,11 @@ static void monitor_events (int argc, char **argv)
                             gw_log (GW_LOG_DEBUG, module, 
                                     "Stop not sent: %d", r);
                         str_queue_rm (&ki->queue);
+                        ki->stopped = 1;
                         break;
                     }
                 }
             }
-#endif
             FD_ZERO (&set_r);
             FD_SET (gip_m_fd, &set_r);
             gw_log (GW_LOG_DEBUG, module, "set gip_m_fd %d", gip_m_fd);
@@ -475,6 +482,7 @@ static void monitor_events (int argc, char **argv)
                         gipc_close (ki->gip);
                         gipc_destroy (ki->gip);
                         ki->gip = NULL;
+                        ki->stopped = 0;
                     }
                     else if ((fd = gip_infileno (ki->gip)) != -1)
                     {                    /* read select on child FIFO */
@@ -519,6 +527,7 @@ static void monitor_events (int argc, char **argv)
                         gipc_close (ki->gip);
                         gipc_destroy (ki->gip);
                         ki->gip = NULL;
+                        ki->stopped = 0;
                     }
                 }
 	    }
-- 
1.7.10.4