From e3bce499be5ee0436146ffc444361a820ce7f430 Mon Sep 17 00:00:00 2001
From: filon <filon@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sun, 5 Jan 2003 11:24:13 +0000
Subject: [PATCH] Check if we can open /dev/mem in preinit(), so we can exit
 cleanly.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8792 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libvo/vo_vesa.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libvo/vo_vesa.c b/libvo/vo_vesa.c
index bebfcfef90..3494d5eaef 100644
--- a/libvo/vo_vesa.c
+++ b/libvo/vo_vesa.c
@@ -28,6 +28,7 @@
 #include <pwd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <fcntl.h>
 
 
 #include "video_out.h"
@@ -1009,6 +1010,7 @@ static void check_events(void)
 static uint32_t preinit(const char *arg)
 {
   int pre_init_err = 0;
+  int fd;
   if(verbose>1) printf("vo_vesa: preinit(%s) was called\n",arg);
   if(verbose > 2)
         printf("vo_vesa: subdevice %s is being initialized\n",arg);
@@ -1018,6 +1020,11 @@ static uint32_t preinit(const char *arg)
 #ifdef CONFIG_VIDIX
   else if(vidix_name) pre_init_err = vidix_preinit(vidix_name,&video_out_vesa);
 #endif
+  // check if we can open /dev/mem (it will be opened later in config(), but if we
+  // detect now that we can't we can exit cleanly)
+  fd = open("/dev/mem", O_RDWR);
+  if (fd < 0)
+  	return -1;
   if(verbose > 2)
         printf("vo_subdevice: initialization returns: %i\n",pre_init_err);
   return pre_init_err;