svn commit: r345474 - head/lib/libvgl

[Bruce Evans]

Author: bde
Date: Sun Mar 24 16:47:43 2019
New Revision: 345474
URL: https://svnweb.freebsd.org/changeset/base/345474

Log:
  Fix libvgl to not always fail to initialize due to its invalid mmap()
  args (neither MAP_PRIVATE nor MAP_SHARED).  It was broken in r271635
  and/or r271724 by stricter checking.  The compatibility code in r271724
  doesn't work for my old binaries (actually new binaries with old
  libraries).
  
  PR:		needed to test the fix for PR 162373

Modified:
  head/lib/libvgl/main.c

Modified: head/lib/libvgl/main.c
==============================================================================
--- head/lib/libvgl/main.c	Sun Mar 24 15:08:30 2019	(r345473)
+++ head/lib/libvgl/main.c	Sun Mar 24 16:47:43 2019	(r345474)
@@ -301,7 +301,7 @@ VGLInit(int mode)
   VGLDisplay->Yorigin = 0;
 
   VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
-		       MAP_FILE, 0, 0);
+		       MAP_FILE | MAP_SHARED, 0, 0);
   if (VGLMem == MAP_FAILED) {
     VGLEnd();
     return -7;
@@ -350,7 +350,7 @@ VGLCheckSwitch()
       ioctl(0, VGLMode, 0);
       VGLCurWindow = 0;
       VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
-			   MAP_FILE, 0, 0);
+			   MAP_FILE | MAP_SHARED, 0, 0);
 
       /* XXX: what if mmap() has failed! */
       VGLDisplay->Type = VIDBUF8;	/* XXX */