Merge branch 'debian' of git://live.debian.net/git/live-boot into debian

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

diff --git a/scripts/live-helpers b/scripts/live-helpers
index 35fb8cf..06bd186 100644 (file)
--- a/scripts/live-helpers
+++ b/scripts/live-helpers
@@ -1,4 +1,4 @@
-# live-initramfs helper functions, used by live-initramfs on boot and by live-snapshot
+# live-boot helper functions, used by live-boot on boot and by live-snapshot
 
 if [ ! -x "/bin/fstype" ]
 then
@@ -26,7 +26,7 @@ subdevices ()
        sysblock=${1}
        r=""
 
-       for dev in "${sysblock}" "${sysblock}"/*
+       for dev in "${sysblock}"/* "${sysblock}"
        do
                if [ -e "${dev}/dev" ]
                then
@@ -76,25 +76,7 @@ is_supported_fs ()
 
 get_fstype ()
 {
-       local FSTYPE
-       local FSSIZE
-
-       # fstype misreports LUKS devices
-       if is_luks "${1}"
-       then
-           /lib/udev/vol_id -t ${1} 2>/dev/null
-           return
-       fi
-
-       eval $(fstype ${1} 2>/dev/null)
-
-       if [ "${FSTYPE}" != "unknown" ]
-       then
-               echo ${FSTYPE}
-               return 0
-       fi
-
-       /lib/udev/vol_id -t ${1} 2>/dev/null
+       /sbin/blkid -s TYPE -o value $1 2>/dev/null
 }
 
 where_is_mounted ()
@@ -197,16 +179,13 @@ setup_loop ()
        local encryption=${5}
        local readonly=${6}
 
-       modprobe -q -b "${module}"
+       # the output of setup_loop is evaluated in other functions,
+       # modprobe leaks kernel options like "libata.dma=0"
+       # as "options libata dma=0" on stdout, causing serious
+       # problems therefor, so instead always avoid output to stdout
+       modprobe -q -b "${module}" 1>/dev/null
 
-       if [ -x /sbin/udevadm ]
-       then
-               # lenny
-               udevadm settle
-       else
-               # etch
-               udevsettle
-       fi
+       udevadm settle
 
        for loopdev in ${pattern}
        do
@@ -295,7 +274,8 @@ try_mount ()
                then
                        fstype=$(get_fstype "${dev}")
                fi
-               mount -t "${fstype}" -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}"
+               mount -t "${fstype}" -o "${opts}" "${dev}" "${mountp}" || \
+               ( echo "SKIPPING: Cannot mount ${dev} on ${mountp}, fstype=${fstype}, options=${opts}" > live-boot.log && return 0 )
        fi
 }
 
@@ -317,18 +297,26 @@ find_cow_device ()
 
        for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
        do
+               fulldevname=$(sys2dev "${sysblock}")
+
+               if echo "${black_listed_devices}" | grep -q -w "${fulldevname}"
+               then
+                       # skip this device entirely
+                       break
+               fi
+
                for dev in $(subdevices "${sysblock}")
                do
                        devname=$(sys2dev "${dev}")
 
-                       if echo "${black_listed_devices}" | grep -q "${devname}"
+                       if echo "${black_listed_devices}" | grep -q -w "${devname}"
                        then
-                               # skip this device enterely
+                               # skip this subdevice
                                break
                        fi
 
                        # Checking for a luks device
-                       if [ -e /sbin/cryptsetup ] && /sbin/cryptsetup isLuks ${devname}
+                       if [ "${PERSISTENT}" = "cryptsetup" ] && [ -e /sbin/cryptsetup ] && /sbin/cryptsetup isLuks ${devname}
                        then
                                while true
                                do
@@ -357,7 +345,7 @@ find_cow_device ()
                                done
                        fi
 
-                       if [ "$(/lib/udev/vol_id -l ${devname} 2>/dev/null)" = "${pers_label}" ]
+                       if [ "$(/sbin/blkid -s LABEL -o value $devname 2>/dev/null)" = "${pers_label}" ]
                        then
                                echo "${devname}"
                                return 0
@@ -367,23 +355,21 @@ find_cow_device ()
                        then
                                # do not mount the device to find for image files
                                # just skip this
-                               break
+                               continue
                        fi
 
                        case "$(get_fstype ${devname})" in
                                vfat|ext2|ext3|ext4|jffs2)
                                        mkdir -p "${cow_backing}"
-                                       if ! try_mount "${devname}" "${cow_backing}" "rw"
-                                       then
-                                               break
-                                       fi
-
-                                       if [ -f "${pers_fpath}" ]
+                                       if try_mount "${devname}" "${cow_backing}" "rw"
                                        then
-                                               echo $(setup_loop "${pers_fpath}" "loop" "/sys/block/loop*")
-                                               return 0
-                                       else
-                                               umount ${cow_backing}
+                                               if [ -f "${pers_fpath}" ]
+                                               then
+                                                       echo $(setup_loop "${pers_fpath}" "loop" "/sys/block/loop*")
+                                                       return 0
+                                               else
+                                                       umount ${cow_backing} > /dev/null 2>&1 || true
+                                               fi
                                        fi
                                        ;;
                                *)
@@ -405,14 +391,22 @@ find_files ()
 
        for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram | grep -v fd)
        do
+               fulldevname=$(sys2dev "${sysblock}")
+
+               if echo "${black_listed_devices}" | grep -q -w "${fulldevname}"
+               then
+                       # skip this device entirely
+                       break
+               fi
+
                for dev in $(subdevices "${sysblock}")
                do
                        devname=$(sys2dev "${dev}")
                        devfstype="$(get_fstype ${devname})"
 
-                       if echo "${black_listed_devices}" | grep -q "${devname}"
+                       if echo "${black_listed_devices}" | grep -q -w "${devname}"
                        then
-                               # skip this device enterely
+                               # skip this subdevice
                                break
                        fi