From: Ben Gras <ben@minix3.org>
Date: Thu, 8 Sep 2005 14:31:23 +0000 (+0000)
Subject: Added shutdown_started global variable. If it's set, we're in the
X-Git-Tag: v3.1.0~151
X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=c655d8b3aed7e9a8ffaa06c0c323d6b3cf5d243b;p=minix.git

Added shutdown_started global variable. If it's set, we're in the
process of doing a shutdown.

Initial purpose is - suppress dead process diagnostic message.
---

diff --git a/kernel/glo.h b/kernel/glo.h
index 7e5d76813..bbc3e8383 100755
--- a/kernel/glo.h
+++ b/kernel/glo.h
@@ -16,6 +16,7 @@
 
 /* Variables relating to shutting down MINIX. */
 EXTERN char kernel_exception;		/* TRUE after system exceptions */
+EXTERN char shutdown_started;		/* TRUE after shutdowns / reboots */
 
 /* Kernel information structures. This groups vital kernel information. */
 EXTERN phys_bytes aout;			/* address of a.out headers */
diff --git a/kernel/main.c b/kernel/main.c
index 641e63351..5dbc25467 100755
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -155,6 +155,9 @@ PUBLIC void main()
   }
 #endif
 
+  /* We're definitely not shutting down. */
+  shutdown_started = 0;
+
   /* MINIX is now ready. All boot image processes are on the ready queue.
    * Return to the assembly code to start running the current process. 
    */
@@ -213,6 +216,9 @@ int how;
           send_sig(proc_nr(rp), SIGKSTOP);
   }
 
+  /* We're shutting down. Diagnostics may behave differently now. */
+  shutdown_started = 1;
+
   /* Notify system processes of the upcoming shutdown and allow them to be 
    * scheduled by setting a watchog timer that calls shutdown(). The timer 
    * argument passes the shutdown status. 
diff --git a/kernel/proc.c b/kernel/proc.c
index 3b49c67f1..8165dc33d 100755
--- a/kernel/proc.c
+++ b/kernel/proc.c
@@ -149,8 +149,8 @@ message *m_ptr;			/* pointer to message in the caller's space */
           return(ECALLDENIED);		/* call denied by ipc mask */
       }
 
-      if (isemptyn(src_dst)) {
-          kprintf("[sys_call: dead dest; %d, %d, %d] ", 
+      if (isemptyn(src_dst) && !shutdown_started) {
+          kprintf("sys_call: dead dest; %d, %d, %d\n", 
               function, proc_nr(caller_ptr), src_dst);
           return(EDEADDST); 		/* cannot send to the dead */
       }