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dracut
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dracut.sh: use getopt to parse arguments 

now we can put options and arguments anywhere we like.

e.g.
$ dracut test.img --force
master
Harald Hoyer 2012-07-03 14:20:51 +02:00
parent 9f355169f4
commit ffa71b4afa
1 changed files with 169 additions and 64 deletions
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233
dracut.sh
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@ -24,7 +24,7 @@
#

# store for logging
dracut_args="$@"
dracut_args=( "$@" )

set -o pipefail

@ -36,7 +36,32 @@ usage() {

# 80x25 linebreak here ^
cat << EOF
Usage: $0 [OPTION]... <initramfs> <kernel-version>
Usage: $0 [OPTION]... [<initramfs> [<kernel-version>]]

Version: $DRACUT_VERSION

Creates initial ramdisk images for preloading modules

-h, --help Display all options

If a [LIST] has multiple arguments, then you have to put these in quotes.

For example:

# dracut --add-drivers "module1 module2" ...

EOF
}

long_usage() {
[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
if [[ -f $dracutbasedir/dracut-version.sh ]]; then
. $dracutbasedir/dracut-version.sh
fi

# 80x25 linebreak here ^
cat << EOF
Usage: $0 [OPTION]... [<initramfs> [<kernel-version>]]

Version: $DRACUT_VERSION

@ -139,8 +164,11 @@ Creates initial ramdisk images for preloading modules
--sshkey [SSHKEY] Add ssh key to initramfs (use with ssh-client module)

If [LIST] has multiple arguments, then you have to put these in quotes.

For example:
# dracut --add-drivers "module1 module2" ...

# dracut --add-drivers "module1 module2" ...

EOF
}

@ -151,9 +179,10 @@ EOF
# example:
# push stack 1 2 "3 4"
push() {
local _i
local __stack=$1; shift
for i in "$@"; do
eval ${__stack}'[${#'${__stack}'[@]}]="$i"'
for _i in "$@"; do
eval ${__stack}'[${#'${__stack}'[@]}]="$_i"'
done
}

@ -169,16 +198,16 @@ push() {
pop() {
local __stack=$1; shift
local __resultvar=$1
local myresult;
local _value;
# check for empty stack
eval '[[ ${#'${__stack}'[@]} -eq 0 ]] && return 1'

eval myresult='${'${__stack}'[${#'${__stack}'[@]}-1]}'
eval _value='${'${__stack}'[${#'${__stack}'[@]}-1]}'

if [[ "$__resultvar" ]]; then
eval $__resultvar="'$myresult'"
eval $__resultvar="'$_value'"
else
echo "$myresult"
echo "$_value"
fi
eval unset ${__stack}'[${#'${__stack}'[@]}-1]'
return 0
@ -202,52 +231,105 @@ read_arg() {
fi
}

# Little helper function for reading args from the commandline to a stack.
# it automatically handles -a b and -a=b variants, and returns 1 if
# we need to shift $3.
push_arg() {
# $1 = arg name
# $2 = arg value
# $3 = arg parameter
local rematch='^[^=]*=(.*)$'
if [[ $2 =~ $rematch ]]; then
push "$1" "${BASH_REMATCH[1]}"
else
push "$1" "$3"
# There is no way to shift our callers args, so
# return 1 to indicate they should do it instead.
return 1
fi
}

verbosity_mod_l=0
unset kernel
unset outfile

while (($# > 0)); do
case ${1%%=*} in
-a|--add) push_arg add_dracutmodules_l "$@" || shift;;
--force-add) push_arg force_add_dracutmodules_l "$@" || shift;;
--add-drivers) push_arg add_drivers_l "$@" || shift;;
--omit-drivers) push_arg omit_drivers_l "$@" || shift;;
-m|--modules) push_arg dracutmodules_l "$@" || shift;;
-o|--omit) push_arg omit_dracutmodules_l "$@" || shift;;
-d|--drivers) push_arg drivers_l "$@" || shift;;
--filesystems) push_arg filesystems_l "$@" || shift;;
-I|--install) push_arg install_items_l "$@" || shift;;
--fwdir) push_arg fw_dir_l "$@" || shift;;
--libdirs) push_arg libdirs_l "$@" || shift;;
--fscks) push_arg fscks_l "$@" || shift;;
--add-fstab) push_arg add_fstab_l "$@" || shift;;
--mount) push_arg fstab_lines "$@" || shift;;
# Workaround -i, --include taking 2 arguments
set -- "${@/--include/++include}"

# This prevents any long argument ending with "-i"
# -i, like --opt-i but I think we can just prevent that
set -- "${@/%-i/++include}"

TEMP=$(unset POSIXLY_CORRECT; getopt \
-o "a:m:o:d:I:k:c:L:fvqlHhM" \
--long add: \
--long force-add: \
--long add-drivers: \
--long omit-drivers: \
--long modules: \
--long omit: \
--long drivers: \
--long filesystems: \
--long install: \
--long fwdir: \
--long libdirs: \
--long fscks: \
--long add-fstab: \
--long mount: \
--long nofscks: \
--long kmoddir: \
--long conf: \
--long confdir: \
--long tmpdir: \
--long stdlog: \
--long compress: \
--long prefix: \
--long force \
--long kernel-only \
--long no-kernel \
--long strip \
--long nostrip \
--long hardlink \
--long nohardlink \
--long noprefix \
--long mdadmconf \
--long nomdadmconf \
--long lvmconf \
--long nolvmconf \
--long debug \
--long profile \
--long sshkey: \
--long verbose \
--long quiet \
--long local \
--long hostonly \
--long no-hostonly \
--long fstab \
--long help \
--long bzip2 \
--long lzma \
--long xz \
--long no-compress \
--long gzip \
--long list-modules \
--long show-modules \
--long keep \
--long printsize \
-- "$@")

if (( $? != 0 )); then
usage
exit 1
fi

eval set -- "$TEMP"

while :; do
case $1 in
-a|--add) push add_dracutmodules_l "$2"; shift;;
--force-add) push force_add_dracutmodules_l "$2"; shift;;
--add-drivers) push add_drivers_l "$2"; shift;;
--omit-drivers) push omit_drivers_l "$2"; shift;;
-m|--modules) push dracutmodules_l "$2"; shift;;
-o|--omit) push omit_dracutmodules_l "$2"; shift;;
-d|--drivers) push drivers_l "$2"; shift;;
--filesystems) push filesystems_l "$2"; shift;;
-I|--install) push install_items_l "$2"; shift;;
--fwdir) push fw_dir_l "$2"; shift;;
--libdirs) push libdirs_l "$2"; shift;;
--fscks) push fscks_l "$2"; shift;;
--add-fstab) push add_fstab_l "$2"; shift;;
--mount) push fstab_lines "$2"; shift;;
--nofscks) nofscks_l="yes";;
-k|--kmoddir) read_arg drivers_dir_l "$@" || shift;;
-c|--conf) read_arg conffile "$@" || shift;;
--confdir) read_arg confdir "$@" || shift;;
--tmpdir) read_arg tmpdir_l "$@" || shift;;
-L|--stdlog) read_arg stdloglvl_l "$@" || shift;;
--compress) read_arg compress_l "$@" || shift;;
--prefix) read_arg prefix_l "$@" || shift;;
-k|--kmoddir) drivers_dir_l="$2"; shift;;
-c|--conf) conffile="$2"; shift;;
--confdir) confdir="$2"; shift;;
--tmpdir) tmpdir_l="$2"; shift;;
-L|--stdlog) stdloglvl_l="$2"; shift;;
--compress) compress_l="$2"; shift;;
--prefix) prefix_l="$2"; shift;;
-f|--force) force=yes;;
--kernel-only) kernel_only="yes"; no_kernel="no";;
--no-kernel) kernel_only="no"; no_kernel="yes";;
@ -262,7 +344,7 @@ while (($# > 0)); do
--nolvmconf) lvmconf_l="no";;
--debug) debug="yes";;
--profile) profile="yes";;
--sshkey) read_arg sshkey "$@" || shift;;
--sshkey) sshkey="$2"; shift;;
-v|--verbose) ((verbosity_mod_l++));;
-q|--quiet) ((verbosity_mod_l--));;
-l|--local)
@ -273,48 +355,67 @@ while (($# > 0)); do
-H|--hostonly) hostonly_l="yes" ;;
--no-hostonly) hostonly_l="no" ;;
--fstab) use_fstab_l="yes" ;;
-h|--help) usage; exit 1 ;;
-h|--help) long_usage; exit 1 ;;
-i|--include) push include_src "$2"
push include_target "$3"
shift 2;;
shift;;
--bzip2) compress_l="bzip2";;
--lzma) compress_l="lzma";;
--xz) compress_l="xz";;
--no-compress) _no_compress_l="cat";;
--gzip) compress_l="gzip";;
--list-modules)
do_list="yes";
;;
--list-modules) do_list="yes";;
-M|--show-modules)
show_modules_l="yes"
;;
--keep) keep="yes";;
--printsize) printsize="yes";;
-*) printf "\nUnknown option: %s\n\n" "$1" >&2; usage; exit 1;;

--) shift; break;;

*) # should not even reach this point
printf "\n!Unknown option: '%s'\n\n" "$1" >&2; usage; exit 1;;
esac
shift
done

# getopt cannot handle multiple arguments, so just handle "-I,--include"
# the old fashioned way

while (($# > 0)); do
case ${1%%=*} in
++include) push include_src "$2"
push include_target "$3"
shift 2;;
*)
if ! [[ ${outfile+x} ]]; then
outfile=$1
elif ! [[ ${kernel+x} ]]; then
kernel=$1
else
echo "Unknown argument: $1"
printf "\nUnknown arguments: %s\n\n" "$*" >&2
usage; exit 1;
fi
;;
esac
shift
done

if ! [[ $kernel ]]; then
kernel=$(uname -r)
fi
[[ $outfile ]] || outfile="/boot/initramfs-$kernel.img"

if ! [[ $outfile ]]; then
outfile="/boot/initramfs-$kernel.img"
fi

for i in /usr/sbin /sbin /usr/bin /bin; do
rl=$i
if [ -L "$i" ]; then
rl=$(readlink -f $i)
fi
NPATH+=":$rl"
if [[ "$NPATH" != "*:$rl*" ]] ; then
NPATH+=":$rl"
fi
done
export PATH="${NPATH#:}"
unset NPATH
@ -536,8 +637,12 @@ done
omit_drivers="${omit_drivers_corrected%|}"
unset omit_drivers_corrected


ddebug "Executing $0 $dracut_args"
# prepare args for logging
for ((i=0; i < ${#dracut_args[@]}; i++)); do
strstr "${dracut_args[$i]}" " " && \
dracut_args[$i]="\"${dracut_args[$i]}\""
done
ddebug "Executing: $0 ${dracut_args[@]}"

[[ $do_list = yes ]] && {
for mod in $dracutbasedir/modules.d/*; do
@ -573,7 +678,7 @@ if [[ ! -d "$outdir" ]]; then
dfatal "Can't write $outfile: Directory $outdir does not exist."
exit 1
elif [[ ! -w "$outdir" ]]; then
dfatal "No permission to write $outdir."
dfatal "No permission to write to $outdir."
exit 1
elif [[ -f "$outfile" && ! -w "$outfile" ]]; then
dfatal "No permission to write $outfile."