setbrk: possible paranoia for the moment

ensure our new sbrk space is clean

diff --git a/Applications/V7/cmd/sh/setbrk.c b/Applications/V7/cmd/sh/setbrk.c
index 618edf7..fe1b31a 100644 (file)
--- a/Applications/V7/cmd/sh/setbrk.c
+++ b/Applications/V7/cmd/sh/setbrk.c
@@ -10,10 +10,13 @@
  */
 
 #include       "defs.h"
+#include       <string.h>
 
 void *setbrk(intptr_t incr)
 {
        uint8_t *a = sbrk(incr);
        brkend = a + incr;
+       if (a != (uint8_t *)-1)
+               memset(a, 0, incr);
        return a;
 }