X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=scripts%2Flive-bottom%2F43disable_updateinitramfs;h=44e2d1f8094c62e1eba861e753b6b6194f718c52;hb=refs%2Ftags%2Fupstream%2F1.236.2;hp=a973843d1ea2f6e3bcc58dcbfd2f9d1cb4753e5e;hpb=c303d09e10ef3774540af4b91d0f25bf8f3c1981;p=live-boot-grml.git

diff --git a/scripts/live-bottom/43disable_updateinitramfs b/scripts/live-bottom/43disable_updateinitramfs
index a973843..44e2d1f 100755
--- a/scripts/live-bottom/43disable_updateinitramfs
+++ b/scripts/live-bottom/43disable_updateinitramfs
@@ -22,20 +22,52 @@ esac
 
 . /scripts/live-functions
 
-log_begin_msg "Disabling update-initramfs (useless on a live CD)..."
+log_begin_msg "Possibly disabling update-initramfs (useless on a live CD)..."
 
 # live-initramfs script
 
 chroot /root dpkg-divert --add --rename --quiet \
 	/usr/sbin/update-initramfs
 
-cat > /root/usr/sbin/update-initramfs <<EOF
+# Running off a USB disk or other writable media.
+if [ -w /root/cdrom ] && \
+   # rw is guaranteed to be first.
+   grep -q ' /root/cdrom rw[, ]' /proc/self/mountinfo
+then
+
+cat > /root/usr/sbin/update-initramfs << 'EOF'
+#!/bin/sh
+
+set -e
+
+update-initramfs.distrib "$@"
+
+if [ -e /cdrom/live/initrd.lz ]
+then
+	zcat /initrd.img | lzma -9c >/cdrom/live/initrd.lz.new
+	mv /cdrom/live/initrd.lz.new /cdrom/live/initrd.lz
+else
+	cp /initrd.img /cdrom/live/initrd.gz.new
+	mv /cdrom/live/initrd.gz.new /cdrom/live/initrd.gz
+fi
+
+cp /vmlinuz /cdrom/live/vmlinuz.new
+mv /cdrom/live/vmlinuz.new /cdrom/live/vmlinuz
+
+exit 0
+EOF
+
+else
+
+cat > /root/usr/sbin/update-initramfs << EOF
 #!/bin/sh
 
-echo "update-initramfs is disabled since running on a live CD"
+echo "update-initramfs is disabled since running on read-only media"
 exit 0
 EOF
 
+fi
+
 chmod 0755 /root/usr/sbin/update-initramfs
 
 log_end_msg