From 1d69d8d6f1459f23977a8eefb32176d6b09491fa Mon Sep 17 00:00:00 2001
From: Michal Schmidt <mschmidt@redhat.com>
Date: Thu, 7 Jun 2012 16:03:33 +0200
Subject: [PATCH] units: add systemd-debug-shell.service

If enabled, the service provides a root shell from an early boot. It also
remains active late into shutdown. It is useful for debugging startup and
shutdown problems.

This is the unit referenced in
http://freedesktop.org/wiki/Software/systemd/Debugging#early_debug_shell
(cherry picked from commit ed061a8dc2acd93c2eb569d2d983d5a77f7e5b77)

Conflicts:
	Makefile.am
---
 Makefile.am                          |    5 ++++-
 configure.ac                         |    6 ++++++
 units/systemd-debug-shell.service.in |   25 +++++++++++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 units/systemd-debug-shell.service.in

diff --git a/Makefile.am b/Makefile.am
index 05e420c..8e387a1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -320,7 +320,8 @@ nodist_systemunit_DATA = \
 	units/fsck-root.service \
 	units/rescue.service \
 	units/suspend.service \
-	units/user@.service
+	units/user@.service \
+	units/systemd-debug-shell.service
 
 dist_userunit_DATA = \
 	units/user/default.target \
@@ -355,6 +356,7 @@ EXTRA_DIST += \
 	units/fsck@.service.in \
 	units/fsck-root.service.in \
 	units/user@.service.in \
+	units/systemd-debug-shell.service.in \
 	units/hibernate.service.in \
 	units/suspend.service.in \
 	introspect.awk \
@@ -2415,6 +2417,7 @@ SED_PROCESS = \
 		-e 's,@exec_prefix\@,$(exec_prefix),g' \
 		-e 's,@libdir\@,$(libdir),g' \
 		-e 's,@includedir\@,$(includedir),g' \
+		-e 's,@sushell\@,$(sushell),g' \
 		< $< > $@ || rm $@
 
 units/%: units/%.in Makefile
diff --git a/configure.ac b/configure.ac
index 8aa6e93..6e13583 100644
--- a/configure.ac
+++ b/configure.ac
@@ -161,6 +161,12 @@ if test "x$enable_selinux" != "xno"; then
         fi
 fi
 AM_CONDITIONAL(HAVE_SELINUX, [test "$have_selinux" = "yes"])
+if test "x${have_selinux}" != xno ; then
+        sushell=/sbin/sushell
+else
+        sushell=/bin/bash
+fi
+AC_SUBST(sushell)
 
 have_xz=no
 AC_ARG_ENABLE(xz, AS_HELP_STRING([--disable-xz], [Disable optional XZ support]))
diff --git a/units/systemd-debug-shell.service.in b/units/systemd-debug-shell.service.in
new file mode 100644
index 0000000..70c01c2
--- /dev/null
+++ b/units/systemd-debug-shell.service.in
@@ -0,0 +1,25 @@
+[Unit]
+Description=Early root shell on tty9 FOR DEBUGGING ONLY
+DefaultDependencies=no
+IgnoreOnIsolate=yes
+
+[Service]
+Environment=TERM=linux
+ExecStart=@sushell@
+Restart=always
+RestartSec=0
+StandardInput=tty
+TTYPath=/dev/tty9
+TTYReset=yes
+TTYVHangup=yes
+KillMode=process
+IgnoreSIGPIPE=no
+# bash ignores SIGTERM
+KillSignal=SIGHUP
+
+# Unset locale for the console getty since the console has problems
+# displaying some internationalized messages.
+Environment=LANG= LANGUAGE= LC_CTYPE= LC_NUMERIC= LC_TIME= LC_COLLATE= LC_MONETARY= LC_MESSAGES= LC_PAPER= LC_NAME= LC_ADDRESS= LC_TELEPHONE= LC_MEASUREMENT= LC_IDENTIFICATION=
+
+[Install]
+WantedBy=sysinit.target