#!/bin/bash
+#
+# inst bits ruthlessly and viciously stolen from dracut
[ -z "$DESTDIR" ] || exit 0
[ -z "$PLYMOUTH_DAEMON_PATH" ] && PLYMOUTH_DAEMON_PATH="@PLYMOUTH_DAEMON_DIR@/plymouthd"
[ -z "$PLYMOUTH_CLIENT_PATH" ] && PLYMOUTH_CLIENT_PATH="@PLYMOUTH_CLIENT_DIR@/plymouth"
-if [ -z "$PLYMOUTH_POPULATE_SOURCE_FUNCTIONS" ]; then
+# Generic substring function. If $2 is in $1, return 0.
+strstr() { [ "${1#*$2*}" != "$1" ]; }
- if [ -f "${PLYMOUTH_LIBEXECDIR}/initrd-functions" ]; then
- PLYMOUTH_POPULATE_SOURCE_FUNCTIONS="${PLYMOUTH_LIBEXECDIR}/initrd-functions"
+ddebug() {
+ [ "$verbose" = "true" ] && echo "$@"
+}
+
+# normalize_path <path>
+# Prints the normalized path, where it removes any duplicated
+# and trailing slashes.
+# Example:
+# $ normalize_path ///test/test//
+# /test/test
+normalize_path() {
+ shopt -q -s extglob
+ set -- "${1//+(\/)//}"
+ shopt -q -u extglob
+ echo "${1%/}"
+}
+
+# convert_abs_rel <from> <to>
+# Prints the relative path, when creating a symlink to <to> from <from>.
+# Example:
+# $ convert_abs_rel /usr/bin/test /bin/test-2
+# ../../bin/test-2
+# $ ln -s $(convert_abs_rel /usr/bin/test /bin/test-2) /usr/bin/test
+convert_abs_rel() {
+ local __current __absolute __abssize __cursize __newpath
+ local -i __i __level
+
+ set -- "$(normalize_path "$1")" "$(normalize_path "$2")"
+
+ # corner case #1 - self looping link
+ [[ "$1" == "$2" ]] && { echo "${1##*/}"; return; }
+
+ # corner case #2 - own dir link
+ [[ "${1%/*}" == "$2" ]] && { echo "."; return; }
+
+ IFS="/" __current=($1)
+ IFS="/" __absolute=($2)
+
+ __abssize=${#__absolute[@]}
+ __cursize=${#__current[@]}
+
+ while [[ ${__absolute[__level]} == ${__current[__level]} ]]
+ do
+ (( __level++ ))
+ if (( __level > __abssize || __level > __cursize ))
+ then
+ break
+ fi
+ done
+
+ for ((__i = __level; __i < __cursize-1; __i++))
+ do
+ if ((__i > __level))
+ then
+ __newpath=$__newpath"/"
+ fi
+ __newpath=$__newpath".."
+ done
+
+ for ((__i = __level; __i < __abssize; __i++))
+ do
+ if [[ -n $__newpath ]]
+ then
+ __newpath=$__newpath"/"
+ fi
+ __newpath=$__newpath${__absolute[__i]}
+ done
+
+ echo "$__newpath"
+}
+
+# Install a directory, keeping symlinks as on the original system.
+# Example: if /lib points to /lib64 on the host, "inst_dir /lib/file"
+# will create ${initdir}/lib64, ${initdir}/lib64/file,
+# and a symlink ${initdir}/lib -> lib64.
+inst_dir() {
+ [[ -e ${initdir}/"$1" ]] && return 0 # already there
+
+ local _dir="$1" _part="${1%/*}" _file
+ while [[ "$_part" != "${_part%/*}" ]] && ! [[ -e "${initdir}/${_part}" ]]; do
+ _dir="$_part $_dir"
+ _part=${_part%/*}
+ done
+
+ # iterate over parent directories
+ for _file in $_dir; do
+ [[ -e "${initdir}/$_file" ]] && continue
+ if [[ -L $_file ]]; then
+ inst_symlink "$_file"
+ else
+ # create directory
+ mkdir -m 0755 -p "${initdir}/$_file" || return 1
+ [[ -e "$_file" ]] && chmod --reference="$_file" "${initdir}/$_file"
+ chmod u+w "${initdir}/$_file"
+ fi
+ done
+}
+
+# $1 = file to copy to ramdisk
+# $2 (optional) Name for the file on the ramdisk
+# Location of the image dir is assumed to be $initdir
+# We never overwrite the target if it exists.
+inst_simple() {
+ [[ -f "$1" ]] || return 1
+ strstr "$1" "/" || return 1
+
+ local _src=$1 target="${2:-$1}"
+ if ! [[ -d ${initdir}/$target ]]; then
+ [[ -e ${initdir}/$target ]] && return 0
+ [[ -L ${initdir}/$target ]] && return 0
+ [[ -d "${initdir}/${target%/*}" ]] || inst_dir "${target%/*}"
+ fi
+ # install checksum files also
+ if [[ -e "${_src%/*}/.${_src##*/}.hmac" ]]; then
+ inst "${_src%/*}/.${_src##*/}.hmac" "${target%/*}/.${target##*/}.hmac"
fi
+ ddebug "Installing $_src"
+ cp --sparse=always -pfL "$_src" "${initdir}/$target"
+}
+
+# find symlinks linked to given library file
+# $1 = library file
+# Function searches for symlinks by stripping version numbers appended to
+# library filename, checks if it points to the same target and finally
+# prints the list of symlinks to stdout.
+#
+# Example:
+# rev_lib_symlinks libfoo.so.8.1
+# output: libfoo.so.8 libfoo.so
+# (Only if libfoo.so.8 and libfoo.so exists on host system.)
+rev_lib_symlinks() {
+ [[ ! $1 ]] && return 0
+
+ local fn="$1" orig="$(readlink -f "$1")" links=''
+
+ [[ ${fn} =~ .*\.so\..* ]] || return 1
+
+ until [[ ${fn##*.} == so ]]; do
+ fn="${fn%.*}"
+ [[ -L ${fn} && $(readlink -f "${fn}") == ${orig} ]] && links+=" ${fn}"
+ done
+
+ echo "${links}"
+}
- if [ -f "${PLYMOUTH_DATADIR}/dracut/dracut-functions.sh" ]; then
- PLYMOUTH_POPULATE_SOURCE_FUNCTIONS="${PLYMOUTH_DATADIR}/dracut/dracut-functions.sh"
- elif [ -f "${PLYMOUTH_DATADIR}/dracut/dracut-functions" ]; then
- PLYMOUTH_POPULATE_SOURCE_FUNCTIONS="${PLYMOUTH_DATADIR}/dracut/dracut-functions"
- elif [ -f "/usr/lib/dracut/dracut-functions.sh" ]; then
- PLYMOUTH_POPULATE_SOURCE_FUNCTIONS="/usr/lib/dracut/dracut-functions.sh"
+# Same as above, but specialized to handle dynamic libraries.
+# It handles making symlinks according to how the original library
+# is referenced.
+inst_library() {
+ local _src="$1" _dest=${2:-$1} _lib _reallib _symlink
+ strstr "$1" "/" || return 1
+ [[ -e $initdir/$_dest ]] && return 0
+ if [[ -L $_src ]]; then
+ # install checksum files also
+ if [[ -e "${_src%/*}/.${_src##*/}.hmac" ]]; then
+ inst "${_src%/*}/.${_src##*/}.hmac" "${_dest%/*}/.${_dest##*/}.hmac"
+ fi
+ _reallib=$(readlink -f "$_src")
+ inst_simple "$_reallib" "$_reallib"
+ inst_dir "${_dest%/*}"
+ [[ -d "${_dest%/*}" ]] && _dest=$(readlink -f "${_dest%/*}")/${_dest##*/}
+ ln -sfn $(convert_abs_rel "${_dest}" "${_reallib}") "${initdir}/${_dest}"
+ else
+ inst_simple "$_src" "$_dest"
fi
-fi
-if [ -n "$PLYMOUTH_POPULATE_SOURCE_FUNCTIONS" ]; then
- source $PLYMOUTH_POPULATE_SOURCE_FUNCTIONS
-fi
+ # Create additional symlinks. See rev_symlinks description.
+ for _symlink in $(rev_lib_symlinks $_src) $(rev_lib_symlinks $_reallib); do
+ [[ ! -e $initdir/$_symlink ]] && {
+ ddebug "Creating extra symlink: $_symlink"
+ inst_symlink $_symlink
+ }
+ done
+}
-if [ " $(type -t inst) " != " function " ]; then
- echo "Need 'inst' function, try setting PLYMOUTH_POPULATE_SOURCE_FUNCTIONS to a file that defines it" 1>&2
- exit 1
-fi
+# find a binary. If we were not passed the full path directly,
+# search in the usual places to find the binary.
+find_binary() {
+ if [[ -z ${1##/*} ]]; then
+ if [[ -x $1 ]] || { strstr "$1" ".so" && ldd $1 &>/dev/null; }; then
+ echo $1
+ return 0
+ fi
+ fi
-if [ " $(type -t set_verbose) " != " function " ]; then
- function set_verbose { true; }
-fi
+ type -P $1
+}
+
+# Same as above, but specialized to install binary executables.
+# Install binary executable, and all shared library dependencies, if any.
+inst_binary() {
+ local _bin _target
+ _bin=$(find_binary "$1") || return 1
+ _target=${2:-$_bin}
+ [[ -e $initdir/$_target ]] && return 0
+ [[ -L $_bin ]] && inst_symlink $_bin $_target && return 0
+ local _file _line
+ local _so_regex='([^ ]*/lib[^/]*/[^ ]*\.so[^ ]*)'
+ # I love bash!
+ LC_ALL=C ldd "$_bin" 2>/dev/null | while read _line; do
+ [[ $_line = 'not a dynamic executable' ]] && break
+
+ if [[ $_line =~ $_so_regex ]]; then
+ _file=${BASH_REMATCH[1]}
+ [[ -e ${initdir}/$_file ]] && continue
+ inst_library "$_file"
+ continue
+ fi
+
+ if [[ $_line =~ not\ found ]]; then
+ dfatal "Missing a shared library required by $_bin."
+ dfatal "Run \"ldd $_bin\" to find out what it is."
+ dfatal "$_line"
+ dfatal "dracut cannot create an initrd."
+ exit 1
+ fi
+ done
+ inst_simple "$_bin" "$_target"
+}
+
+# same as above, except for shell scripts.
+# If your shell script does not start with shebang, it is not a shell script.
+inst_script() {
+ local _bin
+ _bin=$(find_binary "$1") || return 1
+ shift
+ local _line _shebang_regex
+ read -r -n 80 _line <"$_bin"
+ # If debug is set, clean unprintable chars to prevent messing up the term
+ [[ $debug ]] && _line=$(echo -n "$_line" | tr -c -d '[:print:][:space:]')
+ _shebang_regex='(#! *)(/[^ ]+).*'
+ [[ $_line =~ $_shebang_regex ]] || return 1
+ inst "${BASH_REMATCH[2]}" && inst_simple "$_bin" "$@"
+}
+
+# same as above, but specialized for symlinks
+inst_symlink() {
+ local _src=$1 _target=${2:-$1} _realsrc
+ strstr "$1" "/" || return 1
+ [[ -L $1 ]] || return 1
+ [[ -L $initdir/$_target ]] && return 0
+ _realsrc=$(readlink -f "$_src")
+ if ! [[ -e $initdir/$_realsrc ]]; then
+ if [[ -d $_realsrc ]]; then
+ inst_dir "$_realsrc"
+ else
+ inst "$_realsrc"
+ fi
+ fi
+ [[ ! -e $initdir/${_target%/*} ]] && inst_dir "${_target%/*}"
+ [[ -d ${_target%/*} ]] && _target=$(readlink -f ${_target%/*})/${_target##*/}
+ ln -sfn $(convert_abs_rel "${_target}" "${_realsrc}") "$initdir/$_target"
+}
+
+# general purpose installation function
+# Same args as above.
+inst() {
+ local _x
+
+ case $# in
+ 1) ;;
+ 2) [[ ! $initdir && -d $2 ]] && export initdir=$2
+ [[ $initdir = $2 ]] && set $1;;
+ 3) [[ -z $initdir ]] && export initdir=$2
+ set $1 $3;;
+ *) dfatal "inst only takes 1 or 2 or 3 arguments"
+ exit 1;;
+ esac
+ for _x in inst_symlink inst_script inst_binary inst_simple; do
+ $_x "$@" && return 0
+ done
+ return 1
+}
+
+# install function specialized for hooks
+# $1 = type of hook, $2 = hook priority (lower runs first), $3 = hook
+# All hooks should be POSIX/SuS compliant, they will be sourced by init.
+inst_hook() {
+ if ! [[ -f $3 ]]; then
+ dfatal "Cannot install a hook ($3) that does not exist."
+ dfatal "Aborting initrd creation."
+ exit 1
+ elif ! strstr "$hookdirs" "$1"; then
+ dfatal "No such hook type $1. Aborting initrd creation."
+ exit 1
+ fi
+ inst_simple "$3" "/lib/dracut/hooks/${1}/${2}${3##*/}"
+}
+
+# install any of listed files
+#
+# If first argument is '-d' and second some destination path, first accessible
+# source is installed into this path, otherwise it will installed in the same
+# path as source. If none of listed files was installed, function return 1.
+# On first successful installation it returns with 0 status.
+#
+# Example:
+#
+# inst_any -d /bin/foo /bin/bar /bin/baz
+#
+# Lets assume that /bin/baz exists, so it will be installed as /bin/foo in
+# initramfs.
+inst_any() {
+ local to f
+
+ [[ $1 = '-d' ]] && to="$2" && shift 2
+
+ for f in "$@"; do
+ if [[ -e $f ]]; then
+ [[ $to ]] && inst "$f" "$to" && return 0
+ inst "$f" && return 0
+ fi
+ done
+
+ return 1
+}
function usage() {
local output="/dev/stdout"
esac
shift
done
-set_verbose $verbose || :
[ -z "$INITRDDIR" ] && usage error
projects / thirdparty / plymouth.git / commitdiff
