2015-01-13 04:41:34 +01:00
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#!/bin/bash
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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; version 2 of the License.
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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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declare -A pseudofs_types=([anon_inodefs]=1
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2015-02-13 15:17:00 +01:00
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[autofs]=1
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[bdev]=1
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[binfmt_misc]=1
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[cgroup]=1
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[configfs]=1
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[cpuset]=1
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[debugfs]=1
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[devfs]=1
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[devpts]=1
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[devtmpfs]=1
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[dlmfs]=1
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[fuse.gvfs-fuse-daemon]=1
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[fusectl]=1
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[hugetlbfs]=1
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[mqueue]=1
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[nfsd]=1
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[none]=1
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[pipefs]=1
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[proc]=1
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[pstore]=1
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[ramfs]=1
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[rootfs]=1
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[rpc_pipefs]=1
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[securityfs]=1
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[sockfs]=1
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[spufs]=1
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[sysfs]=1
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[tmpfs]=1)
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2015-01-13 04:41:34 +01:00
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declare -A fsck_types=([cramfs]=1
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2015-02-13 15:17:00 +01:00
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[exfat]=1
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[ext2]=1
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[ext3]=1
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[ext4]=1
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[ext4dev]=1
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[jfs]=1
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[minix]=1
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[msdos]=1
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[reiserfs]=1
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[vfat]=1
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[xfs]=1)
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2015-01-13 04:41:34 +01:00
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fstype_is_pseudofs() {
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(( pseudofs_types["$1"] ))
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}
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fstype_has_fsck() {
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(( fsck_types["$1"] ))
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}
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valid_number_of_base() {
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local base=$1 len=${#2} i=
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for (( i = 0; i < len; i++ )); do
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2015-02-13 15:17:00 +01:00
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{ _=$(( $base#${2:i:1} )) || return 1; } 2>/dev/null
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2015-01-13 04:41:34 +01:00
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done
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return 0
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}
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mangle() {
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local i= chr= out=
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unset {a..f} {A..F}
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for (( i = 0; i < ${#1}; i++ )); do
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2015-02-13 15:17:00 +01:00
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chr=${1:i:1}
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case $chr in
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[[:space:]\\])
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printf -v chr '%03o' "'$chr"
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out+=\\
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;;
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esac
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out+=$chr
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2015-01-13 04:41:34 +01:00
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done
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printf '%s' "$out"
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}
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unmangle() {
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local i= chr= out= len=$(( ${#1} - 4 ))
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unset {a..f} {A..F}
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for (( i = 0; i < len; i++ )); do
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2015-02-13 15:17:00 +01:00
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chr=${1:i:1}
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case $chr in
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\\)
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if valid_number_of_base 8 "${1:i+1:3}" ||
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valid_number_of_base 16 "${1:i+1:3}"; then
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printf -v chr '%b' "${1:i:4}"
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(( i += 3 ))
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fi
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;;
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esac
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out+=$chr
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2015-01-13 04:41:34 +01:00
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done
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printf '%s' "$out${1:i}"
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}
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dm_name_for_devnode() {
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read dm_name <"/sys/class/block/${1#/dev/}/dm/name"
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if [[ $dm_name ]]; then
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2015-02-13 15:17:00 +01:00
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printf '/dev/mapper/%s' "$dm_name"
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2015-01-13 04:41:34 +01:00
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else
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2015-02-13 15:17:00 +01:00
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# don't leave the caller hanging, just print the original name
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# along with the failure.
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print '%s' "$1"
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error 'Failed to resolve device mapper name for: %s' "$1"
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2015-01-13 04:41:34 +01:00
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fi
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}
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optstring_match_option() {
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2015-02-13 15:17:00 +01:00
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local candidate pat patterns
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IFS=, read -ra patterns <<<"$1"
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for pat in "${patterns[@]}"; do
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if [[ $pat = *=* ]]; then
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# "key=val" will only ever match "key=val"
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candidate=$2
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else
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# "key" will match "key", but also "key=anyval"
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candidate=${2%%=*}
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fi
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[[ $pat = "$candidate" ]] && return 0
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done
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return 1
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2015-01-13 04:41:34 +01:00
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}
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optstring_remove_option() {
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2015-02-13 15:17:00 +01:00
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local o options_ remove=$2 IFS=,
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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read -ra options_ <<<"${!1}"
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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for o in "${!options_[@]}"; do
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optstring_match_option "$remove" "${options_[o]}" && unset 'options_[o]'
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done
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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declare -g "$1=${options_[*]}"
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2015-01-13 04:41:34 +01:00
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}
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optstring_normalize() {
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2015-02-13 15:17:00 +01:00
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local o options_ norm IFS=,
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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read -ra options_ <<<"${!1}"
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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# remove empty fields
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for o in "${options_[@]}"; do
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[[ $o ]] && norm+=("$o")
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done
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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# avoid empty strings, reset to "defaults"
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declare -g "$1=${norm[*]:-defaults}"
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2015-01-13 04:41:34 +01:00
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}
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optstring_append_option() {
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2015-02-13 15:17:00 +01:00
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if ! optstring_has_option "$1" "$2"; then
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declare -g "$1=${!1},$2"
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fi
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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optstring_normalize "$1"
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2015-01-13 04:41:34 +01:00
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}
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optstring_prepend_option() {
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2015-02-13 15:17:00 +01:00
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local options_=$1
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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if ! optstring_has_option "$1" "$2"; then
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declare -g "$1=$2,${!1}"
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fi
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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optstring_normalize "$1"
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2015-01-13 04:41:34 +01:00
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}
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optstring_get_option() {
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2015-02-13 15:17:00 +01:00
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local opts o
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IFS=, read -ra opts <<<"${!1}"
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for o in "${opts[@]}"; do
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if optstring_match_option "$2" "$o"; then
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declare -g "$o"
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return 0
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fi
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done
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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return 1
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2015-01-13 04:41:34 +01:00
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}
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optstring_has_option() {
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2015-02-13 15:17:00 +01:00
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local "${2%%=*}"
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2015-01-13 04:41:34 +01:00
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2015-02-13 15:17:00 +01:00
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optstring_get_option "$1" "$2"
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}
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