More little bug fixes

src/lib9/9proc.h

@@ -18,3 +18,5 @@ struct Uproc
 
 extern Uproc *_p9uproc(int);
 extern void _p9uprocdie(void);
+extern void _clearuproc(void);
+

src/lib9/_p9proc.c

@@ -18,6 +18,19 @@ static Uproc *alluproc[PIDHASH];
 static int allupid[PIDHASH];
 static Lock uproclock;
 
+void
+_clearuproc(void)
+{
+	int i;
+
+	/* called right after fork - no locking needed */
+	for(i=0; i<PIDHASH; i++)
+		if(alluproc[i] != T && alluproc[i] != 0)
+			free(alluproc[i]);
+	memset(alluproc, 0, sizeof alluproc);
+	memset(allupid, 0, sizeof allupid);
+}
+		
 Uproc*
 _p9uproc(int inhandler)
 {

src/lib9/fork.c

@@ -9,6 +9,7 @@ p9fork(void)
 	int pid;
 
 	pid = fork();
+	_clearuproc();
 	_p9uproc(0);
 	return pid;
 }