From 2c62153351eac55a28e9baee201cd4aca25d9595 Mon Sep 17 00:00:00 2001
From: Ivan Maidanski <ivmai@mail.ru>
Date: Fri, 19 Oct 2012 09:10:07 +0400
Subject: [PATCH] Fix GC_unix_mmap_get_mem for open of /dev/zero failure

* os_dep.c (GC_unix_mmap_get_mem): Check open("/dev/zero") (or open
of similar file on Symbian) result and abort (with the appropriate
message) on failure (only if USE_MMAP_ANON is undefined).
---
 os_dep.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/os_dep.c b/os_dep.c
index 2524c864..eb6b846c 100644
--- a/os_dep.c
+++ b/os_dep.c
@@ -2091,6 +2091,9 @@ STATIC ptr_t GC_unix_mmap_get_mem(word bytes)
 #       else
           zero_fd = open("/dev/zero", O_RDONLY);
 #       endif
+          if (zero_fd == -1)
+            ABORT("Could not open /dev/zero");
+
           fcntl(zero_fd, F_SETFD, FD_CLOEXEC);
           initialized = TRUE;
       }
-- 
2.40.0