Add user suspend support

This patch adds support for user mode suspend to disk. It is installed
in parallel to kernel mode suspend module; either will fail if
system was not suspended using correct tool so next one can be tried.

Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru>

dracut.spec

@@ -186,6 +186,7 @@ rm -rf $RPM_BUILD_ROOT
 %{_datadir}/dracut/modules.d/95znet
 %{_datadir}/dracut/modules.d/95terminfo
 %{_datadir}/dracut/modules.d/95udev-rules
+%{_datadir}/dracut/modules.d/95uswsusp
 %{_datadir}/dracut/modules.d/98syslog
 %{_datadir}/dracut/modules.d/99base
 %attr(0644,root,root) %ghost %config(missingok,noreplace) %{_localstatedir}/log/dracut.log

modules.d/95uswsusp/check

@@ -0,0 +1,2 @@
+#!/bin/sh
+[ -x /usr/sbin/resume ]

modules.d/95uswsusp/install

@@ -0,0 +1,6 @@
+#!/bin/bash
+inst /usr/sbin/resume
+[ -f /etc/suspend.conf ] && inst /etc/suspend.conf
+
+inst_hook cmdline 10 "$moddir/parse-uswsusp.sh"
+inst_hook mount 10 "$moddir/resume-uswsusp.sh"

modules.d/95uswsusp/parse-uswsusp.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+if resume=$(getarg resume=) && ! getarg noresume; then 
+    export resume
+else
+    unset resume
+fi
+
+case "$resume" in
+    LABEL=*)
+	resume="$(echo $resume | sed 's,/,\\x2f,g')"
+	resume="/dev/disk/by-label/${resume#LABEL=}" ;;
+    UUID=*)
+	resume="/dev/disk/by-uuid/${resume#UUID=}" ;;
+esac
+
+if splash=$(getarg splash=); then
+    export splash
+else
+    unset splash
+fi

modules.d/95uswsusp/resume-uswsusp.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+case "$splash" in
+    quiet )
+	a_splash="-P splash=y"
+    ;;
+    * )
+	a_splash="-P splash=n"
+    ;;
+esac
+
+/usr/sbin/resume $a_splash "$resume"