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Gentoo's Bugzilla – Attachment 203348 Details for
Bug 214817
New eselect module for /bin/sh
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Cleanup and improvements, rebranch for Sunrise
sh.eselect (text/plain), 3.04 KB, created by
Michał Górny
on 2009-09-07 08:40:19 UTC
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Description:
Cleanup and improvements, rebranch for Sunrise
Filename:
MIME Type:
Creator:
Michał Górny
Created:
2009-09-07 08:40:19 UTC
Size:
3.04 KB
patch
obsolete
># Copyright 1999-2009 Gentoo Foundation ># Distributed under the terms of the GNU General Public License v2 ># $Id: $ > >DESCRIPTION="Manage /bin/sh (POSIX shell) implementations" >MAINTAINER="gentoo@mgorny.alt.pl" >VERSION="0.1" > ># Based on work of Erik Hahn; bug #214817 > >## Functions ## > ># find a list of sh symlink targets, best first >find_targets() { > local t > for t in \ > bash \ > dash \ > zsh \ > posh \ > ; do > if [[ -x "${ROOT}"/bin/${t} ]]; then > echo ${t} > fi > done >} > ># set the sh symlink >set_symlinks() { > local target="${1}" targets > > [[ ! -L "${ROOT}"/bin/sh && -e "${ROOT}"/bin/sh ]] && \ > die -q "/bin/sh is not a symlink!" > > if is_number "${target}" && [[ ${target} -ge 1 ]]; then > targets=( $(find_targets) ) > target=${targets[$(( ${target} - 1 ))]} > fi > > if [[ -x "${ROOT}"/bin/${target} ]]; then > local tmpf="${ROOT}"/bin/sh.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 "${tmpf}" "${ROOT}"/bin/sh; then > rm -f "${tmpf}" # cleanup > die -q "Unable to replace /bin/sh symlink with ${target}" > fi > else > die -q "Target '${target}' doesn't appear to be valid!" > fi >} > >### show action ### > >describe_show() { > echo "Show the current POSIX shell implementation" >} > >do_show() { > [[ -z "${@}" ]] || die -q "Too many parameters" > > write_list_start "Current POSIX shell implementation:" > if [[ -L "${ROOT}/bin/sh" ]]; then > write_kv_list_entry "$(basename $(canonicalise ${ROOT}/bin/sh))" "" > elif [[ -e "${ROOT}/bin/sh" ]]; then > write_kv_list_entry "(not a symlink)" "" > else > write_kv_list_entry "(unset)" "" > fi >} > >### list action ### > >describe_list() { > echo "List available POSIX shell 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 $(canonicalise ${ROOT}/bin/sh)) ]] && \ > targets[${i}]="${targets[${i}]} $(highlight '*')" > done > write_list_start "Available POSIX shell implementations:" > write_numbered_list "${targets[@]}" > else > write_kv_list_entry "(none found)" "" > fi >} > >### set action ### > >describe_set() { > echo "Set a new POSIX shell 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 "${1}" > fi >} > >### update action ### > >describe_update() { > echo "Automatically update the POSIX shell implementation" >} > >describe_update_options() { > echo "--if-unset : Do not override existing implementation" >} > >do_update() { > [[ -z "${1}" || ( -z "${2}" && "${1}" == "--if-unset" ) ]] || \ > die -q "Usage error" > > [[ "${1}" == "--if-unset" && -L "${ROOT}"/bin/sh && -x "${ROOT}"/bin/sh ]] && \ > return > > set_symlinks 1 >} > ># vim: set syn=sh :
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bug 214817
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199627
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