Revert "Change the implementation of action_on_fail"

This reverts commit d2765b5175.

action_on_fail is useless thus remove the commits for it one by one.

Signed-off-by: Dave Young <dyoung@redhat.com>

dracut.cmdline.7.asc

@@ -159,6 +159,10 @@ Misc
    specify the controlling terminal for the console.
    This is useful, if you have multiple "console=" arguments.
 
+**rd.action_on_fail=**_{shell|continue}_::
+   Specify the action after failure. By default it's emergency_shell.
+   'continue' means: ignore the current failure and go ahead.
+
 [[dracutkerneldebug]]
 Debug
 ~~~~~

modules.d/98dracut-systemd/dracut-emergency.service

@@ -13,7 +13,7 @@ DefaultDependencies=no
 After=systemd-vconsole-setup.service
 Wants=systemd-vconsole-setup.service
 Conflicts=emergency.service emergency.target
-ConditionPathExists=!/lib/dracut/no-emergency-shell
+ConditionKernelCommandLine=!action_on_fail=continue
 
 [Service]
 Environment=HOME=/

modules.d/98dracut-systemd/emergency.service

@@ -12,7 +12,7 @@ Description=Emergency Shell
 DefaultDependencies=no
 After=systemd-vconsole-setup.service
 Wants=systemd-vconsole-setup.service
-ConditionPathExists=!/lib/dracut/no-emergency-shell
+ConditionKernelCommandLine=!action_on_fail=continue
 
 [Service]
 Environment=HOME=/

modules.d/99base/dracut-lib.sh

@@ -1143,16 +1143,24 @@ emergency_shell()
 
 action_on_fail()
 {
-    if [ -f "$initdir/lib/dracut/no-emergency-shell" ]; then
-        [ "$1" = "-n" ] && shift 2
-        [ "$1" = "--shutdown" ] && shift 2
-        warn "$*"
-        warn "Not dropping to emergency shell, because $initdir/lib/dracut/no-emergency-shell exists."
-        return 0
-    fi
-
-    emergency_shell $@
-    return 1
+    local _action=$(getarg rd.action_on_fail= -d action_on_fail=)
+    case "$_action" in
+        continue)
+            [ "$1" = "-n" ] && shift 2
+            [ "$1" = "--shutdown" ] && shift 2
+            warn "$*"
+            warn "Not dropping to emergency shell, because 'action_on_fail=continue' was set on the kernel command line."
+            return 0
+            ;;
+        shell)
+            emergency_shell $@
+            return 1
+            ;;
+        *)
+            emergency_shell $@
+            return 1
+            ;;
+    esac
 }
 
 # Retain the values of these variables but ensure that they are unexported