Adding upstream version 1.157.2.

[live-boot-grml.git] / scripts / live-helpers

diff --git a/scripts/live-helpers b/scripts/live-helpers
index f6b8b8b..59bdb4f 100644 (file)
--- a/scripts/live-helpers
+++ b/scripts/live-helpers
@@ -6,10 +6,19 @@ then
        export PATH="${PATH}:/usr/lib/klibc/bin"
 fi
 
+# handle upgrade path from old udev (using udevinfo) to
+# recent versions of udev (using udevadm info)
+if [ -x /sbin/udevadm ]
+then
+       udevinfo='/sbin/udevadm info'
+else
+       udevinfo='udevinfo'
+fi
+
 sys2dev ()
 {
        sysdev=${1#/sys}
-       echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
+       echo "/dev/$($udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
 }
 
 subdevices ()
@@ -77,7 +86,7 @@ get_fstype ()
            return
        fi
 
-       eval $(fstype < ${1} 2>/dev/null)
+       eval $(fstype ${1} 2>/dev/null)
 
        if [ "${FSTYPE}" != "unknown" ]
        then
@@ -206,7 +215,7 @@ setup_loop ()
                        dev=$(sys2dev "${loopdev}")
                        options=''
 
-                       if [ -n ${readonly} ]
+                       if [ -n "${readonly}" ]
                        then
                                if losetup --help 2>&1 | grep -q -- "-r\b"
                                then
@@ -299,6 +308,13 @@ find_cow_device ()
        cow_backing="/${pers_label}-backing"
        black_listed_devices="${2}"
 
+       if [ -z "${PERSISTENT_PATH}" ]
+       then
+               pers_fpath=${cow_backing}/${pers_label}
+       else
+               pers_fpath=${cow_backing}/${PERSISTENT_PATH}/${pers_label}
+       fi
+
        for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
        do
                for dev in $(subdevices "${sysblock}")
@@ -325,16 +341,16 @@ find_cow_device ()
                        fi
 
                        case "$(get_fstype ${devname})" in
-                               vfat|ext2|ext3|jffs2)
+                               vfat|ext2|ext3|ext4|jffs2)
                                        mkdir -p "${cow_backing}"
                                        if ! try_mount "${devname}" "${cow_backing}" "rw"
                                        then
                                                break
                                        fi
 
-                                       if [ -f "${cow_backing}/${pers_label}" ]
+                                       if [ -f "${pers_fpath}" ]
                                        then
-                                               echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
+                                               echo $(setup_loop "${pers_fpath}" "loop" "/sys/block/loop*")
                                                return 0
                                        else
                                                umount ${cow_backing}