[PATCH] Enhance kdump.conf "default" parameters check.

[Qiao Zhao]

According to man page, default can only use reboot, halt, poweroff,
shell and dump_to_rootfs as parameter.
Currently, if configuration kdump.conf:
------
path /var/crash
core_collector makedumpfile -nosuchfile
default no_such_option
------
kdump service still can be start.

Add function "check_default_config" to kdumpctl file can solve
this problem.

I have tested this patch in my test machine(Fedora-21).

Signed-off-by: Qiao Zhao 
---
 kdumpctl | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/kdumpctl b/kdumpctl
index ca053a1..9bb8fe3 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -781,6 +781,21 @@ start_dump()
    return $?
 }

+check_default_config()
+{
+	local default_option
+
+	default_option=$(awk '$1 ~ /^default$/ {print $2;}' $KDUMP_CONFIG_FILE)
+	case "$default_option" in
+	  reboot|halt|poweroff|shell|dump_to_rootfs)
+		return 0
+		;;
+	  *)
+		echo $"kdump.conf: default {reboot|halt|poweroff|shell|dump_to_rootfs}"
+		return 1
+	esac
+}
+
 start()
 {
    check_config
@@ -817,6 +832,12 @@ start()
    	fi
    fi

+	check_default_config
+	if [ $? -ne 0]; then
+		echo "Starting kdump: [FAILED]"
+		return 1
+	if
+
    check_rebuild
    if [ $? != 0 ]; then
    	echo "Starting kdump: [FAILED]"