From 14499534ba9694591bbcf8741ba7e3a66d71e2d3 Mon Sep 17 00:00:00 2001

From: Harald Hoyer <harald@redhat.com>

Date: Mon, 15 Apr 2013 11:39:32 +0200

Subject: [PATCH] dmsquash-live: add support for "iso-scan/filename" kernel

 parameter

now you can write grub entries like

  set isofile="/Fedora-live.iso"

  loopback loop $isofile

  linux loop)/isolinux/vmlinuz iso-scan/filename=$isofile root=live:CDLABEL=Fedora-...

  initrd (loop)/isolinux/initrd0.img

---

 modules.d/90dmsquash-live/iso-scan.sh       | 25 +++++++++++++++++++++++++

 modules.d/90dmsquash-live/module-setup.sh   |  2 ++

 modules.d/90dmsquash-live/parse-iso-scan.sh | 14 ++++++++++++++

 3 files changed, 41 insertions(+)

 create mode 100755 modules.d/90dmsquash-live/iso-scan.sh

 create mode 100755 modules.d/90dmsquash-live/parse-iso-scan.sh

diff --git a/modules.d/90dmsquash-live/iso-scan.sh b/modules.d/90dmsquash-live/iso-scan.sh

new file mode 100755

index 0000000..9300d12

--- /dev/null

+++ b/modules.d/90dmsquash-live/iso-scan.sh

@@ -0,0 +1,25 @@

+#!/bin/sh

+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-

+# ex: ts=8 sw=4 sts=4 et filetype=sh

+

+type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh

+

+PATH=/usr/sbin:/usr/bin:/sbin:/bin

+

+isofile=$1

+

+[ -z "$isofile" ] && exit 1

+

+mkdir -p "/run/initramfs/isoscan"

+for dev in /dev/disk/by-uuid/*; do

+    mount -t auto -o ro "$dev" "/run/initramfs/isoscan" || continue

+    if [ -f "/run/initramfs/isoscan/$isofile" ]; then

+        losetup -f "/run/initramfs/isoscan/$isofile"

+        exit 0

+    else

+        umount "/run/initramfs/isoscan"

+    fi

+done

+

+rmdir "/run/initramfs/isoscan"

+exit 1

diff --git a/modules.d/90dmsquash-live/module-setup.sh b/modules.d/90dmsquash-live/module-setup.sh

index 76358da..5b283d1 100755

--- a/modules.d/90dmsquash-live/module-setup.sh

+++ b/modules.d/90dmsquash-live/module-setup.sh

@@ -23,10 +23,12 @@ install() {

     dracut_install umount dmsetup blkid dd losetup grep blockdev

     dracut_install -o checkisomd5

     inst_hook cmdline 30 "$moddir/parse-dmsquash-live.sh"

+    inst_hook cmdline 31 "$moddir/parse-iso-scan.sh"

     inst_hook pre-udev 30 "$moddir/dmsquash-live-genrules.sh"

     inst_hook pre-udev 30 "$moddir/dmsquash-liveiso-genrules.sh"

     inst_hook pre-pivot 20 "$moddir/apply-live-updates.sh"

     inst_script "$moddir/dmsquash-live-root.sh" "/sbin/dmsquash-live-root"

+    inst_script "$moddir/iso-scan.sh" "/sbin/iso-scan"

     # should probably just be generally included

     inst_rules 60-cdrom_id.rules

     inst_simple "$moddir/checkisomd5@.service" "/etc/systemd/system/checkisomd5@.service"

diff --git a/modules.d/90dmsquash-live/parse-iso-scan.sh b/modules.d/90dmsquash-live/parse-iso-scan.sh

new file mode 100755

index 0000000..be071fd

--- /dev/null

+++ b/modules.d/90dmsquash-live/parse-iso-scan.sh

@@ -0,0 +1,14 @@

+#!/bin/sh

+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-

+# ex: ts=8 sw=4 sts=4 et filetype=sh

+# live images are specified with

+# root=live:backingdev

+

+isofile=$(getarg iso-scan/filename)

+

+if [ -n "$isofile" ]; then

+    {

+        printf 'KERNEL=="loop0", RUN+="/sbin/initqueue --settled --onetime --unique /sbin/iso-scan %s"\n' \

+            "'${isofile}'"

+    } >> /etc/udev/rules.d/99-isofile-mount.rules

+fi