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#!/bin/bash
# Library for common functions
# echo info messages on stdout
Info() {
# stdout is used to pass back output from bash functions
# so we use stderr
echo "INFO: ${1}" >&2
}
# echo error messages on stderr
Error() {
echo "ERROR: ${1}" >&2
}
# echo error on stderr and exit with error code 1
Fatal() {
Error "${1}"
exit 1
}
# checks the size specifications acceptable to -L
check_numeric_size_syntax() {
data_size=$1
# if it is all numeric, it is valid as by default it will be MB.
[[ $data_size =~ ^[[:digit:]]+$ ]] && return 0
# Numeric digits followed by b or B. (byte specification)
[[ $data_size =~ ^[[:digit:]]+[bB]$ ]] && return 0
# Numeric digits followed by valid suffix. Will support both G and GB.
[[ $data_size =~ ^[[:digit:]]+[sSkKmMgGtTpPeE][bB]?$ ]] && return 0
# Numeric digits followed by valid suffix and ib. Ex. Gib or GiB.
[[ $data_size =~ ^[[:digit:]]+[sSkKmMgGtTpPeE]i[bB]$ ]] && return 0
return 1
}
check_data_size_syntax() {
local data_size=$1
# For -l style options, we only support %FREE and %VG option. %PVS and
# %ORIGIN does not seem to make much sense for this use case.
if [[ $data_size == *%FREE ]] || [[ $data_size == *%VG ]];then
return 0
fi
# -L compatible syntax
check_numeric_size_syntax $data_size && return 0
return 1
}
# Check if passed in vg exists. Returns 0 if volume group exists.
vg_exists() {
local vg=$1
for vg_name in $(vgs --noheadings -o vg_name); do
if [ "$vg_name" == "$vg" ]; then
return 0
fi
done
return 1
}
# Remove volume group if it exists
remove_vg_if_exists() {
vg_exists $1 || return 0
vgremove "$1" > /dev/null
}
pv_exists() {
pvs $1 >/dev/null 2>&1
}
remove_pv_if_exists() {
pv_exists $1 || return 0
pvremove $1 >/dev/null
}