Index: ps.cc
===================================================================
RCS file: /cvs/src/src/winsup/utils/ps.cc,v
retrieving revision 1.26
diff -u -p -r1.26 ps.cc
--- ps.cc	11 May 2009 14:01:17 -0000	1.26
+++ ps.cc	9 Dec 2009 06:23:27 -0000
@@ -257,7 +257,7 @@ int
 main (int argc, char *argv[])
 {
   external_pinfo *p;
-  int aflag, lflag, fflag, sflag, uid, proc_id;
+  int aflag, lflag, fflag, sflag, uid, proc_id, found_proc_id;
   cygwin_getinfo_types query = CW_GETPINFO;
   const char *dtitle = "    PID TTY     STIME COMMAND\n";
   const char *dfmt   = "%7d%4s%10s %s\n";
@@ -271,6 +271,7 @@ main (int argc, char *argv[])
   aflag = lflag = fflag = sflag = 0;
   uid = getuid ();
   proc_id = -1;
+  found_proc_id = 0;
   lflag = 1;
 
   prog_name = strrchr (argv[0], '/');
@@ -368,7 +369,12 @@ main (int argc, char *argv[])
        pid = p->pid)
     {
       if ((proc_id > 0) && (p->pid != proc_id))
-	continue;
+      {
+        if(p->pid != proc_id)
+	  continue;
+        else
+          found_proc_id = 1;
+      }
 
       if (aflag)
 	/* nothing to do */;
@@ -499,6 +505,9 @@ main (int argc, char *argv[])
     }
   (void) cygwin_internal (CW_UNLOCK_PINFO);
 
+  if( proc_id > 0 && !found_proc_id )
+    return 1;
+  
   return 0;
 }