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# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id: eselect-pinentry-0.3,v 1.1 2010/10/21 19:31:11 ssuominen Exp $
# Based on eselect-sh by Michał Górny
DESCRIPTION="Manage /usr/bin/pinentry symlink"
MAINTAINER="ssuominen@gentoo.org"
VERSION="0.2"
## Functions ##
# find a list of pinentry symlink targets, best first
find_targets() {
local t
for t in \
pinentry-qt \
pinentry-gtk-2 \
pinentry-qt4 \
pinentry-curses \
; do
if [[ -x ${EROOT}/usr/bin/${t} ]]; then
echo ${t}
fi
done
}
# set the pinentry symlink
set_symlinks() {
local target="${1}" targets
[[ ! -L ${EROOT}/usr/bin/pinentry && -e ${EROOT}/usr/bin/pinentry ]] && \
die -q "/usr/bin/pinentry is not a symlink!"
if is_number "${target}" && [[ ${target} -ge 1 ]]; then
targets=( $(find_targets) )
# If no targets are found, remove the symlink and exit
if [[ -L ${EROOT}/usr/bin/pinentry && -z ${targets} ]]; then
rm -f "${EROOT}"/usr/bin/pinentry
return
fi
target=${targets[target-1]}
fi
if [[ -x ${EROOT}/usr/bin/${target} ]]; then
local tmpf="${EROOT}"/usr/bin/pinentry.new
# we could use 'ln -f' to directly replace the symlink
# but 'mv' is an atomic operation so it should be more fault-proof
ln -s "${target}" "${tmpf}" || \
die -q "Unable to create temporary symlink"
if ! mv "${tmpf}" "${EROOT}"/usr/bin/pinentry; then
rm -f "${tmpf}" # cleanup
die -q "Unable to replace /usr/bin/pinentry symlink with ${target}"
fi
else
die -q "Target '${target}' doesn't appear to be valid!"
fi
}
### show action ###
describe_show() {
echo "Show the current pinentry implementation"
}
do_show() {
[[ -z ${@} ]] || die -q "Too many parameters"
write_list_start "Current pinentry implementation:"
if [[ -L ${EROOT}/usr/bin/pinentry ]]; then
write_kv_list_entry "$(basename $(readlink ${EROOT}/usr/bin/pinentry))" ""
elif [[ -e ${EROOT}/usr/bin/pinentry ]]; then
write_kv_list_entry "(not a symlink)" ""
else
write_kv_list_entry "(unset)" ""
fi
}
### list action ###
describe_list() {
echo "List available pinentry implementations"
}
do_list() {
[[ -z ${@} ]] || die -q "Too many parameters"
local i targets
targets=( $(find_targets) )
if [[ -n ${targets[@]} ]]; then
for (( i = 0; i < ${#targets[@]}; i++ )) ; do
[[ ${targets[${i}]} == $(basename $(readlink ${EROOT}/usr/bin/pinentry)) ]] && \
targets[${i}]="${targets[${i}]} $(highlight '*')"
done
write_list_start "Available pinentry implementations:"
write_numbered_list "${targets[@]}"
else
write_kv_list_entry "(none found)" ""
fi
}
### set action ###
describe_set() {
echo "Set a new pinentry implementation"
}
describe_set_options() {
echo "target : Target name or number (from 'list' action)"
}
describe_set_parameters() {
echo "<target>"
}
do_set() {
if [[ -z ${1} ]]; then
die -q "Not enough parameters"
elif [[ -n ${2} ]]; then
die -q "Too many parameters"
else
set_symlinks "${1}"
fi
}
### update action ###
describe_update() {
echo "Automatically update the pinentry implementation"
}
describe_update_options() {
echo "ifunset : Do not override existing implementation"
}
do_update() {
[[ -z ${1} || ( -z ${2} && ( ${1} == ifunset || ${1} == '--if-unset' ) ) ]] || \
die -q "Usage error"
[[ ( ${1} == ifunset || ${1} == '--if-unset' ) && -L ${EROOT}/usr/bin/pinentry && -x ${EROOT}/usr/bin/pinentry ]] && \
return
set_symlinks 1
}
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