From 41bed37d157e1a7bdc519bfc3668d59be5b05402 Mon Sep 17 00:00:00 2001
From: Paul Eggert
Date: Mon, 18 Jul 2011 13:24:40 -0700
Subject: * alloc.c (valid_pointer_p): Use pipe, not open.

This fixes some permissions issues when debugging.
---
 src/alloc.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'src/alloc.c')

diff --git a/src/alloc.c b/src/alloc.c
index 44f935c243d..d48d1f34dbd 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -4415,18 +4415,18 @@ valid_pointer_p (void *p)
 #ifdef WINDOWSNT
   return w32_valid_pointer_p (p, 16);
 #else
-  int fd;
+  int fd[2];
 
   /* Obviously, we cannot just access it (we would SEGV trying), so we
      trick the o/s to tell us whether p is a valid pointer.
      Unfortunately, we cannot use NULL_DEVICE here, as emacs_write may
      not validate p in that case.  */
 
-  if ((fd = emacs_open ("__Valid__Lisp__Object__", O_CREAT | O_WRONLY | O_TRUNC, 0666)) >= 0)
+  if (pipe (fd) == 0)
     {
-      int valid = (emacs_write (fd, (char *)p, 16) == 16);
-      emacs_close (fd);
-      unlink ("__Valid__Lisp__Object__");
+      int valid = (emacs_write (fd[1], (char *) p, 16) == 16);
+      emacs_close (fd[1]);
+      emacs_close (fd[0]);
       return valid;
     }
 
-- 
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