- if using it to boot, mount the flash device at /tmp/<partition>

[bootcd.git] / conf_files / pl_sysinit

diff --git a/conf_files/pl_sysinit b/conf_files/pl_sysinit
index 0fded15..fa5810e 100755 (executable)
--- a/conf_files/pl_sysinit
+++ b/conf_files/pl_sysinit
@@ -5,27 +5,51 @@ echo "pl_sysinit: bringing system online"
 echo "pl_sysinit: mounting file systems"
 /bin/mount -v -a
 
-echo "pl_sysinit: bringing loopback network device up"
-/sbin/ifconfig lo 127.0.0.1 up
-
 echo "pl_sysinit: invoking hardware initialization script"
 /etc/init.d/pl_hwinit
 
 echo "pl_sysinit: finding cd to mount on /usr"
-test_devices=/sys/block/*
 mounted=0
 initrd_version=$(/bin/cat /pl_version)
 mkdir /usr
 
-for device in $test_devices; do
+# so that * expands to empty string if there are no block
+# devices
+shopt -s nullglob
+
+for device in /sys/block/*; do
     device=$(/bin/basename $device)
 
-    # skipping any devices that start with md or ra (ram) or lo (loop)
+    # skipping any devices that start with md or ra (ram) or lo (loop) or
+    # fd (floppy)
     start_device=${device:0:2}
     if [ "$start_device" == "ra" ] || [ "$start_device" == "md" ] ||
-       [ "$start_device" == "lo" ]; then
+       [ "$start_device" == "lo" ] || [ "$start_device" == "fd" ]; then
        continue
     fi
+
+    # If this is a removable (e.g., USB flash) device, then try to
+    # look for an ISO image on each of its partitions.
+    if [ "$(cat /sys/block/$device/removable)" = "1" ] ; then
+       partitions=$(/bin/awk "\$4 ~ /${device}[0-9]*/ { print \$4 }" /proc/partitions)
+       for partition in $partitions ; do
+           echo "pl_sysinit: checking $partition for iso image"
+           mkdir -p /tmp/$partition
+           if /bin/mount -o ro -t msdos,ext2 /dev/$partition /tmp/$partition 2>&1 > /dev/null ; then
+               # Look for the first ISO image
+               for iso in /tmp/$partition/*.iso ; do
+                   if /sbin/losetup /dev/loop0 $iso ; then
+                       echo "pl_sysinit: using $(basename $iso) on $partition"
+                       device="loop0"
+                       break
+                   fi
+               done
+               if [ "$device" != "loop0" ] ; then
+                   /bin/umount /tmp/$partition 2>&1 > /dev/null
+               fi
+           fi
+       done
+    fi
     
     echo "pl_sysinit: checking $device for /usr contents"
     /bin/mount -o ro -t iso9660 /dev/$device /usr 2>&1 > /dev/null
@@ -74,3 +98,9 @@ else
     echo "pl_sysinit: unable to create device mapper control node, continuing"
 fi
 
+echo "pl_sysinit: configuring kernel parameters"
+/sbin/sysctl -e -p /etc/sysctl.conf
+
+echo "pl_sysinit: bringing network online"
+/etc/init.d/pl_netinit
+