[X2Go-Commits] [x2goserver] 01/02: Handle stale X11 socket files in cases where x2goagent has mysteriously disappeared (e.g. kill -9). (Fixes: #626).

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x2go pushed a commit to branch release/4.0.1.x
in repository x2goserver.

commit 52314435eb78a79ea0622450a691a1f672f9d39f
Author: Mike Gabriel <mike.gabriel at das-netzwerkteam.de>
Date:   Fri Oct 3 12:33:24 2014 +0200

    Handle stale X11 socket files in cases where x2goagent has mysteriously disappeared (e.g. kill -9). (Fixes: #626).
---
 debian/changelog                  |    2 ++
 debian/control                    |    1 +
 x2goserver.spec                   |    1 +
 x2goserver/sbin/x2gocleansessions |   12 ++++++++++++
 4 files changed, 16 insertions(+)

diff --git a/debian/changelog b/debian/changelog
index 882863a..cf332b4 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,8 @@ x2goserver (4.0.1.17-0x2go1) UNRELEASED; urgency=medium
   * New upstream release (4.0.1.17):
     - Fix breakage of X2Go Server when upgrading from 4.0.1.15 while
       sessions are still in running / suspended state. (Fixes: #623).
+    - Handle stale X11 socket files in cases where x2goagent has
+      mysteriously disappeared (e.g. kill -9). (Fixes: #626).
 
  -- Mike Gabriel <mike.gabriel at das-netzwerkteam.de>  Thu, 02 Oct 2014 12:18:58 +0200
 
diff --git a/debian/control b/debian/control
index f531e7f..4debd42 100644
--- a/debian/control
+++ b/debian/control
@@ -28,6 +28,7 @@ Depends:
  libdbd-pg-perl,
  libdbd-sqlite3-perl,
  libfile-basedir-perl,
+ libfile-remove-perl,
  libcapture-tiny-perl,
  adduser,
  xauth,
diff --git a/x2goserver.spec b/x2goserver.spec
index e142d0c..14c5725 100644
--- a/x2goserver.spec
+++ b/x2goserver.spec
@@ -48,6 +48,7 @@ Requires:       sudo
 Requires:       x2goagent >= 3.5.0.25
 Requires:       xorg-x11-fonts-misc
 Requires:       xorg-x11-xauth
+Requires:       perl(Files::Remove)
 Requires(pre):  shadow-utils
 Requires(post): grep
 Requires(post): perl(DBD::SQLite)
diff --git a/x2goserver/sbin/x2gocleansessions b/x2goserver/sbin/x2gocleansessions
index 56dcbbd..62f4be7 100755
--- a/x2goserver/sbin/x2gocleansessions
+++ b/x2goserver/sbin/x2gocleansessions
@@ -23,6 +23,7 @@
 use strict;
 use Sys::Hostname;
 use Sys::Syslog qw( :standard :macros );
+use File::Remove 'remove';
 use POSIX;
 
 
@@ -191,6 +192,11 @@ elsif ($pid == 0 )
 					# send SIGKILL to dangling X-server processes
 					syslog('warning', "@sinfo[1]: found stale X-server process (@sinfo[0]), sending SIGKILL");
 					system("kill", "-9", "@sinfo[0]");
+					my $display = @sinfo[3];
+					if (-S "/tmp/.X11-unix/X$display") {
+						# remove the NX-X11 socket file (as the agent will not have managed after a kill -9)
+						remove("/tmp/.X11-unix/X$display");
+					}
 					delete $remembered_sessions_since{@sinfo[1]};
 				}
 				syslog('debug', "@sinfo[1]: unmounting all shares");
@@ -200,6 +206,12 @@ elsif ($pid == 0 )
 			elsif (! check_pid (@sinfo[0], at sinfo[1], at sinfo[12]))
 			{
 				system("su", "@sinfo[11]", "-c", "$x2go_lib_path/x2gochangestatus 'F' @sinfo[1]");
+				my $display = @sinfo[3];
+				if (-S "/tmp/.X11-unix/X$display") {
+					# remove the NX-X11 socket file (we don't know how the agent disappeared,
+					# someone might have shot it with kill -9)
+					remove("/tmp/.X11-unix/X$display");
+				}
 				syslog('debug', "@sinfo[1], pid @sinfo[0] does not exist, changing status from @sinfo[4] to F");
 				syslog('debug', "@sinfo[1]: unmounting all shares");
 				system("su", "@sinfo[11]", "-c", "export HOSTNAME && x2goumount-session @sinfo[1]");

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