[fink:package-submissions] #4970 xvfb-run fix for not needing previously run X11

Bah. This is only a very partial fix.  /tmp/.X11-unix is deleted on reboot, so anything that the PostInstScript creates is axed then and we're back to square one. The presence of /tmp/.X11-unix would need to be checked at xvfb-run runtime, and must somehow be done as root. I don't think we want to setuid xbvf-run to root to be able to create /tmp/.X11-unix if absent.


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** [package-submissions:#4970] xvfb-run fix for not needing previously run X11**

**Status:** open
**Group:** Undergoing_Validation
**Labels:** x11 Updated Revision of Existing 
**Created:** Fri Aug 18, 2017 03:17 AM UTC by Hanspeter Niederstrasser
**Last Updated:** Fri Aug 18, 2017 03:17 AM UTC
**Owner:** Daniel Macks
**Attachments:**

- [xvfb-run.info](https://sourceforge.net/p/fink/package-submissions/4970/attachment/xvfb-run.info) (1.4 kB; application/octet-stream)


If you reboot, xvfb-run fails unless X11 has been run once (you can even quit X11 and xvfb-run will still work afterwards; it just needs that initial run). This run sets up /tmp/.X11-unix, where X stores its sockets.

Without the first run, xvfb-run fails with this error:
````
_XSERVTransmkdir: ERROR: euid != 0,directory /tmp/.X11-unix will not be created.
_XSERVTransSocketUNIXCreateListener: mkdir(/tmp/.X11-unix) failed, errno = 2
_XSERVTransMakeAllCOTSServerListeners: failed to create listener for local
````
If I manually create /tmp/.X11-unix, the error changes to:
````
_XSERVTransmkdir: ERROR: Mode of /tmp/.X11-unix must be set to 1777
_XSERVTransSocketUNIXCreateListener: mkdir(/tmp/.X11-unix) failed, errno = 1
_XSERVTransMakeAllCOTSServerListeners: failed to create listener for local
````
If I chmod /tmp/.X11-unix, then xvfb-run runs successfully.

This is the change to xvfb-run:
~~~~
--- xvfb-run.info	10 Sep 2015 21:02:21 -0000	1.1
+++ xvfb-run.info	18 Aug 2017 03:07:26 -0000
@@ -1,11 +1,11 @@
 Package: xvfb-run
 Version: 1.4.2
-Revision: 3
+Revision: 4
 Source: http://patch-tracker.debian.org/patch/debianonly/dl/xorg-server/2:%v-10.lenny4/debian-dir%%20only%%20changes
 SourceRename: xorg-server_%v-10.lenny4.debian-only-changes.diff
 Source-MD5: 6e67c13a732a29318330f9e605c6e2a8
 NoSourceDirectory: true
 Depends: <<
 	getoptbin,
 	x11
 <<
@@ -17,16 +17,24 @@
 <<
 CompileScript: #
 InstallScript: <<
 	mkdir -p %i/bin
 	install -m0755 debian/local/xvfb-run %i/bin
 	mkdir -p %i/share/man/man1
 	install -m0644 debian/local/xvfb-run.1 %i/share/man/man1
 <<
+PostInstScript: <<
+# /tmp/.X11-unix stores the sockets for the X11 server.
+# It needs to exist even if we're faking X11
+if [ ! -d /tmp/.X11-unix/ ]; then
+	/bin/mkdir -p /tmp/.X11-unix
+	/bin/chmod 1777 /tmp/.X11-unix
+fi
+<<
 DocFiles: debian/copyright
 DescPort: <<
 	darwin-specific patch from:
 	http://www.hexten.net/wiki/?title=Patch_xvfb-run_for_Mac_OS_X
 <<
 DescPackaging: <<
 	Script is apparently a debian add-on (various websites say
 	it's standard part of x.org?)
~~~~


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