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Filename : coredumpctl
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# coredumpctl(1) completion                       -*- shell-script -*-
#
# This file is part of systemd.
#
# Copyright 2010 Ran Benita
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# systemd 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 Lesser General Public License
# along with systemd; If not, see <http://www.gnu.org/licenses/>.

__contains_word () {
        local w word=$1; shift
        for w in "$@"; do
                [[ $w = "$word" ]] && return
        done
}

__journal_fields=(MESSAGE{,_ID} PRIORITY CODE_{FILE,LINE,FUNC}
                  ERRNO SYSLOG_{FACILITY,IDENTIFIER,PID} COREDUMP_EXE
                  _{P,U,G}ID _COMM _EXE _CMDLINE
                  _AUDIT_{SESSION,LOGINUID}
                  _SYSTEMD_{CGROUP,SESSION,UNIT,OWNER_UID}
                  _SELINUX_CONTEXT _SOURCE_REALTIME_TIMESTAMP
                  _{BOOT,MACHINE}_ID _HOSTNAME _TRANSPORT
                  _KERNEL_{DEVICE,SUBSYSTEM}
                  _UDEV_{SYSNAME,DEVNODE,DEVLINK}
                  __CURSOR __{REALTIME,MONOTONIC}_TIMESTAMP)
_coredumpctl() {
        local i verb comps
        local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
        local OPTS='-h --help --version --no-pager --no-legend -o --output -F --field -1'

        local -A VERBS=(
            [LIST]='list'
            [DUMP]='dump gdb'
        )

        if __contains_word "$prev" '--output -o'; then
                comps=$( compgen -A file -- "$cur" )
                compopt -o filenames
        elif __contains_word "$prev" '--FIELD -F'; then
                comps=$( compgen -W '${__journal_fields[*]}' -- "$cur" )
        elif [[ $cur = -* ]]; then
                comps=${OPTS}
        elif __contains_word "$prev" ${VERBS[*]} &&
           ! __contains_word ${COMP_WORDS[COMP_CWORD-2]} '--output -o -F --field'; then
                compopt -o nospace
                COMPREPLY=( $(compgen -W '${__journal_fields[*]}' -S= -- "$cur") )
               return 0
        elif [[ $cur = *=* ]]; then
                mapfile -t field_vals < <(coredumpctl -F "${prev%=}" 2>/dev/null)
                COMPREPLY=( $(compgen -W '${field_vals[*]}' -- "${cur#=}") )
                return 0
        elif [[ $prev = '=' ]]; then
                mapfile -t field_vals < <(coredumpctl -F "${COMP_WORDS[COMP_CWORD-2]}" 2>/dev/null)
                comps=${field_vals[*]}
        else
                for ((i=0; i <= COMP_CWORD; i++)); do
                        if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]}; then
                                verb=${COMP_WORDS[i]}
                                break
                        fi
                done

                if [[ -z $verb ]]; then
                        comps=${VERBS[*]}
                elif __contains_word "$verb" ${VERBS[LIST]} ${VERBS[DUMP]}; then
                        comps=''
                fi
        fi

        COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
        return 0
}

complete -F _coredumpctl coredumpctl