* pinfo.cc (EnumProcessesNT): Avoid 0 pids.

(EnumProcesses9x): Ditto.
* sigproc.cc (remove_childe): Eliminate.
(proc_subproc): Move remove_child stuff here.
(wait_subproc): Synchronize with proc_subproc when error occurs.  Add more
debugging info.
* sigproc.h (procstuff): Add an entry.
* spawn.cc (spawn_guts): Add sigframe here.

winsup/cygwin/ChangeLog

@@ -1,3 +1,14 @@
+Sat Nov  4 00:51:38 2000  Christopher Faylor <cgf@cygnus.com>
+
+	* pinfo.cc (EnumProcessesNT): Avoid 0 pids.
+	(EnumProcesses9x): Ditto.
+	* sigproc.cc (remove_childe): Eliminate.
+	(proc_subproc): Move remove_child stuff here.
+	(wait_subproc): Synchronize with proc_subproc when error occurs.  Add
+	more debugging info.
+	* sigproc.h (procstuff): Add an entry.
+	* spawn.cc (spawn_guts): Add sigframe here.
+
 Fri Nov  3 20:07:14 2000  Christopher Faylor <cgf@cygnus.com>
 
 	* sigproc.cc (wait_subproc): Refine debug output.

winsup/cygwin/pinfo.cc

@@ -327,14 +327,17 @@ EnumProcessesNT (DWORD* &pidlist, DWORD &npidlist)
   SYSTEM_PROCESSES *px = procs;
   for (;;)
     {
-      if (nelem >= npidlist)
+      if (px->ProcessId)
 	{
-	  npidlist += slop_pidlist;
-	  pidlist = (DWORD *) realloc (pidlist, size_pidlist (npidlist));
+	  if (nelem >= npidlist)
+	    {
+	      npidlist += slop_pidlist;
+	      pidlist = (DWORD *) realloc (pidlist, size_pidlist (npidlist));
+	    }
+	  pidlist[nelem++] = cygwin_pid (px->ProcessId);
+	  if (!px->NextEntryDelta)
+	    break;
 	}
-      pidlist[nelem++] = cygwin_pid (px->ProcessId);
-      if (!px->NextEntryDelta)
-	break;
       px = (SYSTEM_PROCESSES *) ((char *) px + px->NextEntryDelta);
     }
 
@@ -359,6 +362,8 @@ EnumProcesses9x (DWORD* &pidlist, DWORD &npidlist)
   if (myProcess32First(h, &proc))
     do
       {
+	if (!proc.th32ProcessID)
+	  continue;
 	if (nelem >= npidlist)
 	  {
 	    npidlist += slop_pidlist;

winsup/cygwin/sigproc.cc

@@ -116,7 +116,6 @@ int NO_COPY pending_signals = 0;	// TRUE if signals pending
 static int __stdcall checkstate (waitq *);
 static __inline__ BOOL get_proc_lock (DWORD, DWORD);
 static HANDLE __stdcall getsem (_pinfo *, const char *, int, int);
-static void __stdcall remove_child (int);
 static void __stdcall remove_zombie (int);
 static DWORD WINAPI wait_sig (VOID *arg);
 static int __stdcall stopped_or_terminated (waitq *, _pinfo *);
@@ -285,7 +284,13 @@ proc_subproc (DWORD what, DWORD val)
 		  pchildren[val]->pid, val, hchildren[val], nchildren, nzombies);
       zombies[nzombies] = pchildren[val];	// Add to zombie array
       zombies[nzombies++]->process_state = PID_ZOMBIE;// Walking dead
-      remove_child (val);		// Remove from children array
+      sigproc_printf ("removing [%d], pid %d, handle %p, nchildren %d",
+		      val, pchildren[val]->pid, hchildren[val], nchildren);
+      if ((int) val < --nchildren)
+	{
+	  hchildren[val] = hchildren[nchildren];
+	  pchildren[val] = pchildren[nchildren];
+	}
       break;
 
     /* A child is in the stopped state.  Scan wait() queue to see if anyone
@@ -934,23 +939,6 @@ get_proc_lock (DWORD what, DWORD val)
   return TRUE;
 }
 
-/* Remove a child from pchildren/hchildren by swapping it with the
- * last child in the list.
- */
-static void __stdcall
-remove_child (int ci)
-{
-  sigproc_printf ("removing [%d], pid %d, handle %p, nchildren %d",
-	      ci, pchildren[ci]->pid, hchildren[ci], nchildren);
-  if (ci < --nchildren)
-    {
-      pchildren[ci] = pchildren[nchildren];
-      hchildren[ci] = hchildren[nchildren];
-    }
-
-  return;
-}
-
 /* Remove a zombie from zombies by swapping it with the last child in the list.
  */
 static void __stdcall
@@ -1250,7 +1238,9 @@ wait_subproc (VOID *)
 	     closed a handle in the children[] array.  So, we try looping a couple
 	     of times to stabilize. FIXME - this is not foolproof.  Probably, this
 	     thread should be responsible for closing the children. */
-	  if (++errloop < 10)
+	  if (!errloop++)
+	    proc_subproc (PROC_NOTHING, 0);	// Just synchronize and continue
+	  if (errloop < 10)
 	    continue;
 
 	  system_printf ("wait failed. nchildren %d, wait %d, %E",
@@ -1262,9 +1252,10 @@ wait_subproc (VOID *)
 	      continue;
 	    else
 	      {
-		system_printf ("event[%d] %p, pchildren[%d] %p, %E", i, i, pchildren[i]);
-		system_printf ("pid %d, dwProcessId %u, progname '%s'", i,
-			       events[0], pchildren[i]->pid, pchildren[i]->dwProcessId,
+		system_printf ("nchildren %d, event[%d] %p, pchildren[%d] %p, %E",
+			       nchildren, i, events[0], i, (_pinfo *) pchildren[i]);
+		system_printf ("pid %d, dwProcessId %u, progname '%s'",
+			       pchildren[i]->pid, pchildren[i]->dwProcessId,
 			       pchildren[i]->progname);
 	      }
 	  break;

winsup/cygwin/sigproc.h

@@ -20,7 +20,8 @@ enum procstuff
   PROC_CHILDSTOPPED	= 2,	// a child stopped
   PROC_CHILDTERMINATED	= 3,	// a child died
   PROC_CLEARWAIT	= 4,	// clear all waits - signal arrived
-  PROC_WAIT		= 5	// setup for wait() for subproc
+  PROC_WAIT		= 5,	// setup for wait() for subproc
+  PROC_NOTHING		= 6	// nothing, really
 };
 
 typedef struct struct_waitq

winsup/cygwin/spawn.cc

@@ -289,6 +289,7 @@ spawn_guts (HANDLE hToken, const char * prog_arg, const char *const *argv,
 {
   BOOL rc;
   pid_t cygpid;
+  sigframe thisframe (mainthread);
 
   MALLOC_CHECK;