Package: initramfs-tools
Version: 0.92o
Severity: wishlist
Tags: patch

Hi,

What do you think about adding such a feature? It would be useful
for creating custom initramfs images for other machines in conjunction
with the -d option. Find attached a patch against the Lenny branch.

Thanks,
Feri.
>From eee04d47a9571de8ce5823fd6d1de88d6ae4298d Mon Sep 17 00:00:00 2001
From: Ferenc Wagner <wferi@niif.hu>
Date: Fri, 12 Mar 2010 16:57:26 +0100
Subject: [PATCH] mkinitramfs: new -b option to ignore stuff under /usr/share/initramfs-tools

---
mkinitramfs | 23 ++++++++++++++---------
mkinitramfs.8 | 7 +++++++
2 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/mkinitramfs b/mkinitramfs
index 0fc45db..7cc6dd6 100755
--- a/mkinitramfs
+++ b/mkinitramfs
@@ -4,6 +4,7 @@ umask 0022
export PATH='/usr/bin:/sbin:/bin'

# Defaults
+system="y"
keep="n"
CONFDIR="/etc/initramfs-tools"
verbose="n"
@@ -11,7 +12,7 @@ errors_to="2>/dev/null"
# BUSYBOXDIR="/usr/lib/initramfs-tools/bin/"
BUSYBOXDIR="/bin"

-OPTIONS=`getopt -o d:ko:r:v --long supported-host-version:,supported-target-version: -n "$0" -- "$@"`
+OPTIONS=`getopt -o bd:ko:r:v --long supported-host-version:,supported-target-version: -n "$0" -- "$@"`

# Check for non-GNU getopt
if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
@@ -20,6 +21,10 @@ eval set -- "$OPTIONS"

while true; do
case "$1" in
+ -b)
+ unset system # prepare a "bare" initramfs, based on user configuration only
+ shift
+ ;;
-d)
CONFDIR="$2"
shift 2
@@ -84,7 +89,7 @@ fi

. "${CONFDIR}/initramfs.conf"
EXTRA_CONF='
-for i in /usr/share/initramfs-tools/conf.d/* ${CONFDIR}/conf.d/*; do
+for i in ${system:+/usr/share/initramfs-tools/conf.d/*} ${CONFDIR}/conf.d/*; do
EXTRA_CONF="${EXTRA_CONF} $(basename $i
| grep '^[[:alnum:]][[:alnum:]._-]*$' | grep -v '.dpkg-.*$')";
done
@@ -93,13 +98,13 @@ done
for i in ${EXTRA_CONF}; do
if [ -e ${CONFDIR}/conf.d/${i} ]; then
. ${CONFDIR}/conf.d/${i}
- elif [ -e /usr/share/initramfs-tools/conf.d/${i} ]; then
+ elif [ -n "$system" ] && [ -e /usr/share/initramfs-tools/conf.d/${i} ]; then
. /usr/share/initramfs-tools/conf.d/${i}
fi
done

# source package confs
-for i in /usr/share/initramfs-tools/conf-hooks.d/*; do
+for i in ${system:+/usr/share/initramfs-tools/conf-hooks.d/*}; do
if [ -e "${i}" ]; then
. "${i}"
fi
@@ -127,7 +132,7 @@ fi
# Check that we're using a new enough kernel version, first for ourselves,
# then for each of the hooks, which can have a MINKVER variable defined
check_minkver ${version}
-check_minkver ${version} /usr/share/initramfs-tools/hooks
+[ -n "$system" ] && check_minkver ${version} /usr/share/initramfs-tools/hooks
check_minkver ${version} ${CONFDIR}/hooks

case "${version}" in
@@ -185,7 +190,7 @@ for d in bin conf/conf.d etc lib/modules sbin scripts ${MODULESDIR}; do
done

# MODULES=list case. Always honour.
-for x in "${CONFDIR}/modules" /usr/share/initramfs-tools/modules.d/*; do
+for x in "${CONFDIR}/modules" ${system:+/usr/share/initramfs-tools/modules.d/*}; do
if [ -f "${x}" ]; then
add_modules_from_file "${x}"
fi
@@ -224,7 +229,7 @@ rm -f ${DESTDIR}/bin/kinit* ${DESTDIR}/bin/gzip
copy_exec /usr/share/initramfs-tools/init /init

# add existant boot scripts
-for b in $(cd /usr/share/initramfs-tools/scripts/ && find .
+[ -n "$system" ] && for b in $(cd /usr/share/initramfs-tools/scripts/ && find .
-regextype posix-extended -regex '.*/[[:alnum:]_]+$' -type f); do
[ -d "${DESTDIR}/scripts/$(dirname "${b}")" ]
|| mkdir -p "${DESTDIR}/scripts/$(dirname "${b}")"
@@ -243,7 +248,7 @@ copy_exec "${CONFDIR}/initramfs.conf" /conf
for i in ${EXTRA_CONF}; do
if [ -e "${CONFDIR}/conf.d/${i}" ]; then
copy_exec "${CONFDIR}/conf.d/${i}" /conf/conf.d
- elif [ -e "/usr/share/initramfs-tools/conf.d/${i}" ]; then
+ elif [ -n "$system" ] && [ -e "/usr/share/initramfs-tools/conf.d/${i}" ]; then
copy_exec "/usr/share/initramfs-tools/conf.d/${i}" /conf/conf.d
fi
done
@@ -280,7 +285,7 @@ if [ "$DPKG_ARCH" = arm ] || [ "$DPKG_ARCH" = armeb ]; then
cp -a /lib/libgcc_s.so.1 "${DESTDIR}/lib/"
fi

-run_scripts /usr/share/initramfs-tools/hooks
+[ -n "$system" ] && run_scripts /usr/share/initramfs-tools/hooks
run_scripts "${CONFDIR}"/hooks

# Apply DSDT to initramfs
diff --git a/mkinitramfs.8 b/mkinitramfs.8
index abb3f39..5a18b29 100644
--- a/mkinitramfs.8
+++ b/mkinitramfs.8
@@ -5,6 +5,7 @@ mkinitramfs - low-level tool for generating an initramfs image

.SH SYNOPSIS
.B mkinitramfs
+.RB [ -b ]
.RB [ -d
.IR confdir ]
.RB [ -k ]
@@ -45,6 +46,12 @@ happens in this early userspace.

.SH OPTIONS
.TP
+fB -b
+Create a `bare' initramfs image by ignoring the system-wide hooks, scripts,
+modules and configuration under
+.IR /usr/share/initramfs-tools .
+
+.TP
fB -d fI confdir
Set an alternate configuration directory.

--
1.5.6.5

On Fri, 12 Mar 2010, Ferenc Wagner wrote:

> What do you think about adding such a feature? It would be useful
> for creating custom initramfs images for other machines in conjunction
> with the -d option.

don't think both features mix equaly well.

first of all the ignore mechanism should be more flexible,
allowing to pass a list of things like an
EXCLUDE="lvm2,legacylvm,keymap,cryptopensc,cryptro ot"
in initramfs.conf

second the other box feature request needs deeper structural changes
hadn't time to get along yet and didn't see anyhting conclusive yet.

> Find attached a patch against the Lenny branch.

please go for latest git, has lots of changes, thanks:
http://git.debian.org/?p=kernel/initramfs-tools.git;a=summary
(that will land soonest in sid)

but i don't think that I'd want to merge this proposal as is currently,
due to aboves points.

> Thanks,
> Feri.

thanks for tackling this issues.



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