Remove duplicate slash in save path

Now kdump cannt parse the path correctly, if the path contains
duplicated "/". Following is an example to explain it detail. (the
directory /mnt is a mount point which is mounted a block device)

path //mnt/var/crash

Then the warning will raise.

Force rebuild /boot/initramfs-3.19.1kdump.img
Rebuilding /boot/initramfs-3.19.1kdump.img
df: ‘/mnt///mnt/var/crash’: No such file or directory
/sbin/mkdumprd: line 239: [: -lt: unary operator expected
kexec: loaded kdump kernel
Starting kdump: [OK]

For above case, kdump fails to check the fs size, due to the incorrect
path.

In kdump code flow, we will cut out the mount point(/mnt) from the
path(//mnt/var/crash). But the mount point cannt match the path, because
of the duplicated "/".

To fix it, we will strip the duplicated "/" firstly.

Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>

dracut-module-setup.sh

@@ -311,15 +311,17 @@ kdump_install_net() {
 default_dump_target_install_conf()
 {
     local _target _fstype
-    local _s  _t
     local _mntpoint
-    local _path _save_path
+    local _save_path
 
     is_user_configured_dump_target && return
 
     _save_path=$(get_option_value "path")
     [ -z "$_save_path" ] && _save_path=$DEFAULT_PATH
 
+    # strip the duplicated "/"
+    _save_path=$(echo $_save_path | tr -s /)
+
     _mntpoint=$(get_mntpoint_from_path $_save_path)
     _target=$(get_target_from_path $_save_path)
     if [ "$_mntpoint" != "/" ]; then
@@ -334,13 +336,12 @@ default_dump_target_install_conf()
 
         echo "$_fstype $_target" >> ${initdir}/tmp/$$-kdump.conf
 
-        _path=${_save_path##"$_mntpoint"}
+        _save_path=${_save_path##"$_mntpoint"}
 
         #erase the old path line, then insert the parsed path
         sed -i "/^path/d" ${initdir}/tmp/$$-kdump.conf
-        echo "path $_path" >> ${initdir}/tmp/$$-kdump.conf
+        echo "path $_save_path" >> ${initdir}/tmp/$$-kdump.conf
     fi
-
 }
 
 #install kdump.conf and what user specifies in kdump.conf

mkdumprd

@@ -13,6 +13,9 @@ conf_file="/etc/kdump.conf"
 SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
 SAVE_PATH=$(grep ^path $conf_file| cut -d' '  -f2)
 [ -z "$SAVE_PATH" ] && SAVE_PATH=$DEFAULT_PATH
+# strip the duplicated "/"
+SAVE_PATH=$(echo $SAVE_PATH | tr -s /)
+
 extra_modules=""
 dracut_args=("--hostonly" "-o" "plymouth dash resume")
 OVERRIDE_RESETTABLE=0