Add some basic functions used for the initramfs
Add some functions used by the initramfs generator from Fedora's mkinitrd with bits and pieces stripped out. This needs a closer look to ensure that we're not bringing along any other old baggagemaster
Jeremy Katz
parent
aec3529511
commit
04b56f3a01
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@ -0,0 +1,291 @@
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#!/bin/bash
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#
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# functions used by mkinitrd and other tools.
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#
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# Copyright 2005-2008 Red Hat, Inc. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Authors:
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# Peter Jones <pjones@redhat.com>
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# Jeremy Katz <katzj@redhat.com>
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# Jakub Jelinek <jakub@redhat.com>
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#
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#
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IF_RTLD=""
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IF_dynamic=""
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function get_dso_deps() {
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local bin="$1" ; shift
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declare -a FILES
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declare -a NAMES
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local LDSO=$(echo nash-showelfinterp $bin | /sbin/nash --forcequiet)
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[ -z "$LDSO" -o "$LDSO" == "$bin" ] && local LDSO="$IF_RTLD"
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[ -z "$LDSO" -o "$LDSO" == "$bin" ] && return 1
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[ -z "$IF_RTLD" ] && IF_RTLD="$LDSO"
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# I hate shell.
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declare -i n=0
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while read NAME I0 FILE ADDR I1 ; do
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[ "$FILE" == "not" ] && FILE="$FILE $ADDR"
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[ "$NAME" == "not" ] && NAME="$NAME $I0"
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NAMES[$n]="$NAME"
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FILES[$n]="$FILE"
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let n++
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done << EOF
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$(LD_TRACE_PRELINKING=1 LD_WARN= LD_TRACE_LOADED_OBJECTS=1 \
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$LDSO $bin 2>/dev/null)
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EOF
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[ ${#FILES[*]} -eq 0 ] && return 1
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# we don't want the name of the binary in the list
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if [ "${FILES[0]}" == "$bin" ]; then
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FILES[0]=""
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NAMES[0]=""
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[ ${#FILES[*]} -eq 1 ] && return 1
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fi
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declare -i n=0
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while [ $n -lt ${#FILES[*]} ]; do
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local FILE="${FILES[$n]}"
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local NAME="${NAMES[$n]}"
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if [ "$FILE" == "not found" -o "$NAME" == "not found" ]; then
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cat 1>&2 <<EOF
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There are missing files on your system. The dynamic object $bin
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requires ${NAMES[$n]} n order to properly function. mkinitrd cannot continue.
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EOF
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return 1
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fi
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case "$FILE" in
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/lib*)
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TLIBDIR=`echo "$FILE" | sed 's,\(/lib[^/]*\)/.*$,\1,'`
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BASE=`basename "$FILE"`
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# Prefer nosegneg libs over direct segment accesses on i686.
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if [ -f "$TLIBDIR/i686/nosegneg/$BASE" ]; then
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FILE="$TLIBDIR/i686/nosegneg/$BASE"
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# Otherwise, prefer base libraries rather than their optimized
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# variants.
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elif [ -f "$TLIBDIR/$BASE" ]; then
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FILE="$TLIBDIR/$BASE"
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fi
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FILES[$n]="$FILE"
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;;
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esac
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IF_dynamic="yes"
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let n++
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done
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echo "${FILES[@]}"
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}
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function inst() {
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if [ "$#" != "2" -a "$#" != "3" ];then
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echo "usage: inst <file> <root> [<destination file>]"
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return 1
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fi
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local file="$1" ; shift
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local root="${1%%/}/" ; shift
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local dest="${1##/}"
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[ -z "$dest" ] && local dest="${file##/}"
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mkdir -p "$root/$(dirname $dest)"
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local RET=0
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local target=""
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[ -L "$file" ] && target=$(readlink "$file")
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if [ -n "$target" -a "$dest" != "$target" ]; then
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if [ -e "$root$dest" ]; then
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RET=0
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else
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ln -sf "$target" "$root$dest"
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#inst "$target" "$root"
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local BASE=`basename "$target"`
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local LIBDIR=`echo "$file" | sed -e 's,\(\(.*\)/\)[^/]\+$,\1,'`
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if [ "$LIBDIR" = "$BASE" ]; then
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local LIBDIR=`echo "/$dest" | sed -e 's,\(\(.*\)/\)[^/]\+$,\1,'`
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fi
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local TLIBDIR=`echo "$target" | sed -e 's,\(^/lib[^/]*\)/.*$,\1/,' \
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-e 's,\(\(.*\)/\)[^/]\+$,\1,'`
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if [ "$TLIBDIR" = "$BASE" ]; then
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local TLIBDIR=`echo "/$dest" | sed \
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-e 's,\(^/lib[^/]*\)/.*$,\1/,' \
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-e 's,\(\(.*\)/\)[^/]\+$,\1,'`
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fi
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inst "$LIBDIR/$BASE" "$root" "$TLIBDIR/$BASE"
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RET=$?
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return $RET
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fi
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fi
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local SHEBANG=$(dd if="$file" bs=2 count=1 2>/dev/null)
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if [ "$SHEBANG" == '#!' ]; then
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# We're intentionally not playing the "what did this moron run
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# in his shell script" game. There's nothing but pain in that.
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local interp=$(head -1 "$file" | sed 's/^#! *//')
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inst "$interp" "$root"
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RET=$?
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return $RET
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fi
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if [ -e "$root$dest" ]; then
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RET=0
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else
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if [ -n "$target" -a -L "$target" ]; then
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inst "$target" "$root"
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RET=$?
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else
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cp -aL "$file" "$root$dest"
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local DEPS=$(get_dso_deps "$file")
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if [ -n "$DEPS" ]; then
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IF_dynamic="yes"
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fi
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for x in $DEPS ; do
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local TLIBDIR=`echo "$x" | sed 's,\(/lib[^/]*\)/.*$,\1,'`
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local BASE=`basename "$x"`
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inst "$x" "$root" "$TLIBDIR/$BASE"
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done
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RET=$?
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fi
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fi
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return $RET
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}
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# module dep finding and installation functions
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moduledep() {
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MPARGS=""
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if [ "$1" == "--ignore-install" ]; then
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MPARGS="$MPARGS --ignore-install"
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shift
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fi
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vecho -n "Looking for deps of module $1"
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deps=""
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deps=$(modprobe $MPARGS --set-version $kernel --show-depends $1 2>/dev/null| awk '/^insmod / { print gensub(".*/","","g",$2) }' | while read foo ; do [ "${foo%%.ko}" != "$1" ] && echo -n "${foo%%.ko} " ; done)
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[ -n "$deps" ] && vecho ": $deps" || vecho
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}
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locatemodule() {
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MPARGS=""
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if [ "$1" == "--ignore-install" ]; then
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MPARGS="$MPARGS --ignore-install"
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shift
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fi
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fmPath=$(modprobe $MPARGS --set-version $kernel --show-depends $1 2>/dev/null | awk '/^insmod / { print $2; }' | tail -1)
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if [ -n "$fmPath" -a -f "$fmPath" ]; then
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return 0
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fi
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for modExt in o.gz o ko ; do
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for modDir in /lib/modules/$kernel/updates /lib/modules/$kernel ; do
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if [ -d $modDir ]; then
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fmPath=$(find $modDir -name $1.ko |awk {'print $1; exit;'})
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if [ -n "$fmPath" -a -f "$fmPath" ]; then
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return 0
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fi
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fi
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done
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done
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return 1
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}
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resolveAndExpandModules() {
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items=$*
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mods=$(expandModules $items)
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echo "looking for $mods"
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resdeps $mods
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echo $resolved
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}
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expandModules() {
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items=$*
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for m in $items ; do
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char=$(echo $m | cut -c1)
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if [ $char = '=' ]; then
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NAME=$(echo $m | cut -c2-)
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if [ "$NAME" = "ata" ]; then
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MODS="$MODS $(cat /lib/modules/$kernel/modules.block |egrep '(ata|ahci)' |sed -e 's/.ko//')"
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else
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# Ignore if group list does not exist
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if [ -e /lib/modules/$kernel/modules.$NAME ]; then
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MODS="$MODS $(cat /lib/modules/$kernel/modules.$NAME |sed -e 's/.ko//')"
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fi
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fi
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else
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MODS="$MODS $m"
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fi
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done
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echo $MODS
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}
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installmodule()
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{
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MPARGS=""
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if [ "$1" == "--ignore-install" ]; then
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MPARGS="$MPARGS --ignore-install"
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shift
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fi
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MODULE=$1
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MNTIMAGE=$2
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fmPath=""
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locatemodule $MPARGS $MODULE
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MODULE=$fmPath
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if [ -z "$MODULE" ]; then
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return
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fi
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if [ -x /usr/bin/strip ]; then
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/usr/bin/strip -g $MODULE -o $MNTIMAGE/lib/modules/$kernel/$(basename $MODULE)
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else
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inst "$MODULE" "$MNTIMAGE" "/lib/modules/$kernel/$(basename $MODULE)"
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fi
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for fw in $(/sbin/modinfo -F firmware $MODULE 2>/dev/null); do
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if [ -f /lib/firmware/$fw ]; then
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inst "/lib/firmware/$fw" "$MNTIMAGE" "/lib/firmware/$fw"
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fi
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done
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}
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# This loops to make sure it resolves dependencies of dependencies of...
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resdeps () {
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modlist="$1"
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before=1
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after=2
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items=$(eval echo \${$modlist})
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while [ $before != $after ]; do
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before=$(echo $items | wc -c)
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list=""
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for i in $items ; do
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deps=""
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moduledep $i
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list="$list $deps"
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done
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items=$(for n in $items $list; do echo $n; done | sort -u)
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after=`echo $items | wc -c`
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done
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resolved="$items"
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}
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# vim:ts=8:sw=4:sts=4:et
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