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#
# functions used by dracut and other tools.
#
# Copyright 2005-2009 Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
#
export LC_MESSAGES=C
# is_func
# Check whether $1 is a function.
is_func() {
[[ "$(type -t "$1")" == "function" ]]
}
# Generic substring function. If $2 is in $1, return 0.
strstr() { [[ $1 == *"$2"* ]]; }
# Generic glob matching function. If glob pattern $2 matches anywhere in $1, OK
strglobin() { [[ $1 == *$2* ]]; }
# Generic glob matching function. If glob pattern $2 matches all of $1, OK
# shellcheck disable=SC2053
strglob() { [[ $1 == $2 ]]; }
# returns OK if $1 contains literal string $2 at the beginning, and isn't empty
str_starts() { [ "${1#"$2"*}" != "$1" ]; }
# returns OK if $1 contains literal string $2 at the end, and isn't empty
str_ends() { [ "${1%*"$2"}" != "$1" ]; }
# find a binary. If we were not passed the full path directly,
# search in the usual places to find the binary.
find_binary() {
local _delim
local _path
local l
local p
[[ -z ${1##/*} ]] || _delim="/"
if [[ $1 == *.so* ]]; then
# shellcheck disable=SC2154
for l in $libdirs; do
_path="${l}${_delim}${1}"
if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then
printf "%s\n" "${_path}"
return 0
fi
done
_path="${_delim}${1}"
if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then
printf "%s\n" "${_path}"
return 0
fi
fi
if [[ $1 == */* ]]; then
_path="${_delim}${1}"
if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then
printf "%s\n" "${_path}"
return 0
fi
fi
for p in $DRACUT_PATH; do
_path="${p}${_delim}${1}"
if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then
printf "%s\n" "${_path}"
return 0
fi
done
[[ -n $dracutsysrootdir ]] && return 1
type -P "${1##*/}"
}
ldconfig_paths() {
$DRACUT_LDCONFIG ${dracutsysrootdir:+-r ${dracutsysrootdir} -f /etc/ld.so.conf} -pN 2> /dev/null | grep -E -v '/(lib|lib64|usr/lib|usr/lib64)/[^/]*$' | sed -n 's,.* => \(.*\)/.*,\1,p' | sort | uniq
}
# Version comparision function. Assumes Linux style version scheme.
# $1 = version a
# $2 = comparision op (gt, ge, eq, le, lt, ne)
# $3 = version b
vercmp() {
local _n1
read -r -a _n1 <<< "${1//./ }"
local _op=$2
local _n2
read -r -a _n2 <<< "${3//./ }"
local _i _res
for ((_i = 0; ; _i++)); do
if [[ ! ${_n1[_i]}${_n2[_i]} ]]; then
_res=0
elif ((${_n1[_i]:-0} > ${_n2[_i]:-0})); then
_res=1
elif ((${_n1[_i]:-0} < ${_n2[_i]:-0})); then
_res=2
else
continue
fi
break
done
case $_op in
gt) ((_res == 1)) ;;
ge) ((_res != 2)) ;;
eq) ((_res == 0)) ;;
le) ((_res != 1)) ;;
lt) ((_res == 2)) ;;
ne) ((_res != 0)) ;;
esac
}
# Create all subdirectories for given path without creating the last element.
# $1 = path
mksubdirs() {
# shellcheck disable=SC2174
[[ -e ${1%/*} ]] || mkdir -m 0755 -p -- "${1%/*}"
}
# Function prints global variables in format name=value line by li