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355 lines
11 KiB
355 lines
11 KiB
#!/bin/bash |
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# |
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# functions used by dracut and other tools. |
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# |
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# Copyright 2005-2009 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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IF_RTLD="" |
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IF_dynamic="" |
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# Generic substring function. If $2 is in $1, return 0. |
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strstr() { [[ ! ${1#*$2*} = $1 ]]; } |
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# Log initrd creation. |
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if ! [[ $dracutlogfile ]]; then |
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[[ $dsrc = /usr/share/dracut ]] && \ |
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dracutlogfile=/var/log/dracut.log || \ |
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dracutlogfile=/tmp/dracut.log |
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[[ -w $dracutlogfile ]] || dracutlogfile=/tmp/dracut.log |
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>"$dracutlogfile" |
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fi |
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dwarning() { |
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echo "W: $@" >&2 |
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[[ -w $dracutlogfile ]] && echo "W: $@" >>"$dracutlogfile" |
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} |
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dinfo() { |
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[[ $beverbose ]] && echo "I: $@" >&2 |
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[[ -w $dracutlogfile ]] && echo "I: $@" >>"$dracutlogfile" |
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} |
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derror() { |
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echo "E: $@" >&2 |
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[[ -w $dracutlogfile ]] && echo "E: $@" >>"$dracutlogfile" |
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} |
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# $1 = file to copy to ramdisk |
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# $2 (optional) Name for the file on the ramdisk |
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# Location of the image dir is assumed to be $initdir |
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# We never overwrite the target if it exists. |
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inst_simple() { |
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local src target |
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[[ -f $1 ]] || return 1 |
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src=$1 target=${initdir}${2:-$1} |
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[[ -f $target ]] && return 0 |
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mkdir -p "${target%/*}" |
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dinfo "Installing $src" |
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cp -pfL "$src" "$target" |
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} |
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# Same as above, but specialzed to handle dynamic libraries. |
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# It handles making symlinks according to how the original library |
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# is referenced. |
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inst_library() { |
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local src=$1 dest=${2:-$1} |
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[[ -f $initdir$dest ]] && return 0 |
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if [[ -L $src ]]; then |
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reallib=$(readlink -f "$src") |
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lib=${src##*/} |
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inst_simple "$reallib" "$reallib" |
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mkdir -p "${initdir}${dest%/*}" |
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(cd "${initdir}${dest%/*}" && ln -s "$reallib" "$lib") |
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else |
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inst_simple "$src" "$dest" |
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fi |
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} |
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# find a binary. If we were not passed the full path directly, |
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# search in the usual places to find the binary. |
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find_binary() { |
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local binpath="/bin /sbin /usr/bin /usr/sbin" p |
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[[ -z ${1##/*} && -x $1 ]] && { echo $1; return 0; } |
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for p in $binpath; do |
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[[ -x $p/$1 ]] && { echo "$p/$1"; return 0; } |
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done |
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return 1 |
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} |
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# Same as above, but specialized to install binary executables. |
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# Install binary executable, and all shared library dependencies, if any. |
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inst_binary() { |
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local bin target |
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bin=$(find_binary "$1") || return 1 |
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target=${2:-$bin} |
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local LDSO NAME IO FILE ADDR I1 n f TLIBDIR |
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[[ -f $initdir$target ]] && return 0 |
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# I love bash! |
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ldd $bin 2>/dev/null | while read line; do |
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[[ $line = 'not a dynamic executable' ]] && return 1 |
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if [[ $line =~ not\ found ]]; then |
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derror "Missing a shared library required by $bin." |
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derror "Run \"ldd $bin\" to find out what it is." |
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derror "dracut cannot create an initrd." |
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exit 1 |
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fi |
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so_regex='([^ ]*/lib[^/]*/[^ ]*\.so[^ ]*)' |
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[[ $line =~ $so_regex ]] || continue |
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FILE=${BASH_REMATCH[1]} |
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[[ -f ${initdir}$FILE ]] && continue |
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# see if we are loading an optimized version of a shared lib. |
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lib_regex='^(/lib[^/]*).*' |
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if [[ $FILE =~ $lib_regex ]]; then |
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TLIBDIR=${BASH_REMATCH[1]} |
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BASE=${FILE##*/} |
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# prefer nosegneg libs, then unoptimized ones. |
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for f in "$TLIBDIR/i686/nosegneg" "$TLIBDIR"; do |
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[[ -f $f/$BASE ]] || continue |
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FILE=$f/$BASE |
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break |
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done |
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inst_library "$FILE" "$TLIBDIR/$BASE" |
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IF_dynamic=yes |
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continue |
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fi |
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inst_library "$FILE" |
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done |
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inst_simple "$bin" "$target" |
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} |
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# same as above, except for shell scripts. |
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# If your shell script does not start with shebang, it is not a shell script. |
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inst_script() { |
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[[ -f $1 ]] || return 1 |
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local line |
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read -r -n 80 line <"$1" |
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# If debug is set, clean unprintable chars to prevent messing up the term |
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[[ $debug ]] && line=$(echo -n "$line" | tr -c -d '[:print:][:space:]') |
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shebang_regex='(#! *)(/[^ ]+).*' |
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[[ $line =~ $shebang_regex ]] || return 1 |
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inst "${BASH_REMATCH[2]}" && inst_simple "$@" |
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} |
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# same as above, but specialized for symlinks |
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inst_symlink() { |
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local src=$1 target=$initdir${2:-$1} realsrc |
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[[ -L $1 ]] || return 1 |
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[[ -L $target ]] && return 0 |
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realsrc=$(readlink -f "$src") |
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[[ $realsrc = ${realsrc##*/} ]] && realsrc=${src%/*}/$realsrc |
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inst "$realsrc" && ln -s "$realsrc" "$target" |
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} |
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# find a rule in the usual places. |
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find_rule() { |
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[[ -f $1 ]] && { echo "$1"; return 0; } |
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for r in . /lib/udev/rules.d /etc/udev/rules.d $dsrc/rules.d; do |
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[[ -f $r/$1 ]] && { echo "$r/$1"; return 0; } |
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done |
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return 1 |
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} |
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# udev rules always get installed in the same place, so |
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# create a function to install them to make life simpler. |
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inst_rules() { |
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local target=/etc/udev/rules.d |
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mkdir -p "$initdir/lib/udev/rules.d" "$initdir$target" |
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for rule in "$@"; do |
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rule=$(find_rule "$rule") && \ |
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inst_simple "$rule" "$target/${rule##*/}" |
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done |
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} |
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# general purpose installation function |
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# Same args as above. |
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inst() { |
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if (($# != 1 && $# != 2 )); then |
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derror "inst only takes 1 or 2 arguments" |
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exit 1 |
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fi |
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for x in inst_symlink inst_script inst_binary inst_simple; do |
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$x "$@" && return 0 |
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done |
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return 1 |
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} |
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# install function specialized for hooks |
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# $1 = type of hook, $2 = hook priority (lower runs first), $3 = hook |
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# All hooks should be POSIX/SuS compliant, they will be sourced by init. |
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inst_hook() { |
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if ! [[ -f $3 ]]; then |
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derror "Cannot install a hook ($3) that does not exist." |
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derror "Aborting initrd creation." |
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exit 1 |
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elif ! strstr "$hookdirs" "$1"; then |
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derror "No such hook type $1. Aborting initrd creation." |
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exit 1 |
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fi |
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inst_simple "$3" "/${1}/${2}${3##*/}" |
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} |
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dracut_install() { |
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if [[ $1 = '-o' ]]; then |
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local optional=yes |
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shift |
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fi |
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while (($# > 0)); do |
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if ! inst "$1" ; then |
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if [[ $optional = yes ]]; then |
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dwarning "Skipping program $1 as it cannot be found and is flagged to be optional" |
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else |
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derror "Failed to install $1" |
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exit 1 |
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fi |
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fi |
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shift |
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done |
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} |
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check_module_deps() { |
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local moddir dep ret |
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# if we are already set to be loaded, we do not have to be checked again. |
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strstr "$mods_to_load" " $1 " && return |
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# turn a module name into a directory, if we can. |
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moddir=$(echo ${dsrc}/modules.d/??${1}) |
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[[ -d $moddir && -x $moddir/install ]] || return 1 |
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# if we do not have a check script, we are unconditionally included |
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if [[ -x $moddir/check ]]; then |
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"$moddir/check" |
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ret=$? |
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# a return value of 255 = load module only as a dependency. |
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((ret==0||ret==255)) || return 1 |
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for dep in $("$moddir/check" -d); do |
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check_module_deps "$dep" && continue |
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dwarning "Dependency $mod failed." |
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return 1 |
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done |
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fi |
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mods_to_load+=" $1 " |
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} |
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should_source_module() { |
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local dep |
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[[ -x $1/install ]] || return 1 |
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if [[ $kernel_only = yes ]]; then |
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[[ -x $1/installkernel ]] && return 0 |
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return 1 |
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fi |
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[[ -x $1/check ]] || return 0 |
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"$1/check" $hostonly || return 1 |
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for dep in $("$1/check" -d); do |
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check_module_deps "$dep" && continue |
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dwarning "Cannot load $mod, dependencies failed." |
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return 1 |
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done |
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} |
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check_modules() { |
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for moddir in "$dsrc/modules.d"/[0-9][0-9]*; do |
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local mod=${moddir##*/}; mod=${mod#[0-9][0-9]} |
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# If we are already scheduled to be loaded, no need to check again. |
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strstr "$mods_to_load" " $mod " && continue |
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# This should never happen, but... |
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[[ -d $moddir ]] || continue |
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[[ $dracutmodules != all ]] && ! strstr "$dracutmodules" "$mod" && \ |
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continue |
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strstr "$omit_dracutmodules" "$mod" && continue |
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if ! strstr "$add_dracutmodules" "$mod"; then |
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should_source_module "$moddir" || continue |
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fi |
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mods_to_load+=" $mod " |
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done |
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} |
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# Install a single kernel module along with any firmware it may require. |
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# $1 = full path to kernel module to install |
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install_kmod_with_fw() { |
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local modname=${1##*/} fwdir found |
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modname=${modname%.ko} |
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inst_simple "$1" "/lib/modules/$kernel/${1##*/lib/modules/$kernel/}" |
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for fw in $(modinfo -k $kernel -F firmware $1 2>/dev/null); do |
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found='' |
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for fwdir in $fw_dir; do |
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if [[ -d $fwdir && -f $fwdir/$fw ]]; then |
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inst_simple "$fwdir/$fw" "/lib/firmware/$fw" |
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found=yes |
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fi |
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done |
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if [[ $found != yes ]]; then |
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dwarning "Possible missing firmware ${fw} for module ${mod}.ko" |
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fi |
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done |
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} |
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# Do something with all the dependencies of a kernel module. |
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# Note that kernel modules depend on themselves using the technique we use |
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# $1 = function to call for each dependency we find |
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# It will be passed the full path to the found kernel module |
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# $2 = module to get dependencies for |
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# rest of args = arguments to modprobe |
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for_each_kmod_dep() { |
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local func=$1 kmod=$2 cmd modpapth options |
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shift 2 |
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modprobe "$@" --ignore-install --show-depends $kmod 2>/dev/null | \ |
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while read cmd modpath options; do |
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[[ $cmd = insmod ]] || continue |
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$func $modpath |
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done |
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} |
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# install kernel modules along with all their dependencies. |
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instmods() { |
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[[ $no_kernel = yes ]] && return |
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local mod mpargs modpath modname cmd |
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while (($# > 0)); do |
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mod=${1%.ko} |
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case $mod in |
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=*) # This introduces 2 incompatible meanings for =* arguments |
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# to instmods. We need to decide which one to keep. |
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if [[ $mod = =ata && -f $srcmods/modules.block ]] ; then |
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instmods $mpargs $(egrep 'ata|ahci' "${srcmods}/modules.block") |
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elif [ -f $srcmods/modules.${mod#=} ]; then |
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instmods $mpargs $(cat ${srcmods}/modules.${mod#=} ) |
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else |
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instmods $mpargs $(find "$srcmods" -path "*/${mod#=}/*") |
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fi |
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;; |
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--*) mpargs+=" $mod";; |
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i2o_scsi) |
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# Must never run this diagnostic-only module |
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shift; continue; |
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;; |
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*) mod=${mod##*/} |
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# if we are already installed, skip this module and go on |
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# to the next one. |
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[[ -f $initdir/$1 ]] && { shift; continue; } |
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# If we are building a host-specific initramfs and this |
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# module is not already loaded, move on to the next one. |
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[[ $hostonly ]] && ! grep -q "$mod" /proc/modules && { |
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shift; continue; |
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} |
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# ok, load the module, all its dependencies, and any firmware |
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# it may require |
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for_each_kmod_dep install_kmod_with_fw $mod \ |
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--set-version $kernel -d ${srcmods%%/lib/modules/*}/ |
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;; |
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esac |
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shift |
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done |
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} |
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# vim:ts=8:sw=4:sts=4:et
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