Bug#394554: casper: Boot from non-CD non-usb devices

[Bas Wijnen]

Package: casper
Version: 1.71+debian-1
Severity: wishlist
Tags: patch

The current code checks for CD or usb, and only boots from those devices.  I
need to boot a removable IDE drive (cold-pluggable), which didn't work due to
explicit checks.  The attached patch removes them, and thus allows booting
from any medium.

It also contains the patch from #394308.

Thanks,
Bas

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diff -ur orig/scripts/casper casper-1.71+debian/scripts/casper
--- orig/scripts/casper 2006-10-20 16:23:22.000000000 +0200
+++ casper-1.71+debian/scripts/casper   2006-10-21 20:41:25.000000000 +0200
@@ -438,43 +438,18 @@
 find_livefs() {
     mounted=
     for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v 
ram); do
-        devname=$(sys2dev "${sysblock}")
-        fstype=$(get_fstype "${devname}")
-        if /lib/udev/cdrom_id ${devname} > /dev/null; then
-            mount -t ${fstype} -o ro "$devname" $mountpoint || continue
-            if is_casper_path $mountpoint; then
-                echo $mountpoint
-                return
-            else
-                umount $mountpoint
-            fi
-        elif is_usb_device "$sysblock"; then
-            for dev in $(subdevices "${sysblock}"); do
-                devname=$(sys2dev "${dev}")
-                fstype=$(get_fstype "${devname}")
-                case ${fstype} in
-                    vfat|iso9660|udf)
-                        mount -t ${fstype} -o ro "${devname}" $mountpoint || 
continue
-                        if is_casper_path $mountpoint; then
-                            echo $mountpoint
-                            return
-                        else
-                            umount $mountpoint
-                        fi
-                        ;;
-                esac
-            done
-        elif [ "${fstype}" = "squashfs" ||  \
-                "${fstype}" = "ext2" ]; then
-
-            # This is an ugly hack situation, the block device has
-            # an image directly on it.  It's hopefully
-            # casper, so take it and run with it.
-
-            ln -s "${devname}" "${devname}.${fstype}"
-            echo "${devname}.${fstype}"
-            return
-        fi
+       # Try to find casper on this device, or on a partition of it
+        for dev in $(subdevices "${sysblock}"); do
+            devname=$(sys2dev "${dev}")
+            fstype=$(get_fstype "${devname}")
+           mount -t ${fstype} -o ro "$devname" $mountpoint || continue
+           if is_casper_path $mountpoint; then
+               echo $mountpoint
+               return
+           else
+               umount $mountpoint
+           fi
+       done
     done
 }
 
@@ -520,6 +495,9 @@
             if [ "${livefs_root}" ]; then
                 break
             fi
+           # Don't go through the checks too fast, the device may need some
+           # time to appear.
+           sleep 2
         done
 
         if [ "$?" -gt 0 ]; then

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