Adding upstream version 1:2.11.upstream/1%2.11upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 2282 insertions, 0 deletions

diff --git a/bash_completion b/bash_completion
new file mode 100644
index 0000000..1a7f563
--- /dev/null
+++ b/bash_completion
@@ -0,0 +1,2266 @@
+#                                                          -*- shell-script -*-
+#
+#   bash_completion - programmable completion functions for bash 4.2+
+#
+#   Copyright © 2006-2008, Ian Macdonald <ian@caliban.org>
+#             © 2009-2020, Bash Completion Maintainers
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2, or (at your option)
+#   any later version.
+#
+#   This program 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 General Public License
+#   along with this program; if not, write to the Free Software Foundation,
+#   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+#   The latest version of this software can be obtained here:
+#
+#   https://github.com/scop/bash-completion
+
+BASH_COMPLETION_VERSINFO=(2 11)
+
+if [[ $- == *v* ]]; then
+    BASH_COMPLETION_ORIGINAL_V_VALUE="-v"
+else
+    BASH_COMPLETION_ORIGINAL_V_VALUE="+v"
+fi
+
+if [[ ${BASH_COMPLETION_DEBUG-} ]]; then
+    set -v
+else
+    set +v
+fi
+
+# Blacklisted completions, causing problems with our code.
+#
+_blacklist_glob='@(acroread.sh)'
+
+# Turn on extended globbing and programmable completion
+shopt -s extglob progcomp
+
+# A lot of the following one-liners were taken directly from the
+# completion examples provided with the bash 2.04 source distribution
+
+# start of section containing compspecs that can be handled within bash
+
+# user commands see only users
+complete -u groups slay w sux
+
+# bg completes with stopped jobs
+complete -A stopped -P '"%' -S '"' bg
+
+# other job commands
+complete -j -P '"%' -S '"' fg jobs disown
+
+# readonly and unset complete with shell variables
+complete -v readonly unset
+
+# set completes with set options
+complete -A setopt set
+
+# shopt completes with shopt options
+complete -A shopt shopt
+
+# helptopics
+complete -A helptopic help
+
+# unalias completes with aliases
+complete -a unalias
+
+# type and which complete on commands
+complete -c command type which
+
+# builtin completes on builtins
+complete -b builtin
+
+# start of section containing completion functions called by other functions
+
+# Check if we're running on the given userland
+# @param $1 userland to check for
+_userland()
+{
+    local userland=$(uname -s)
+    [[ $userland == @(Linux|GNU/*) ]] && userland=GNU
+    [[ $userland == "$1" ]]
+}
+
+# This function sets correct SysV init directories
+#
+_sysvdirs()
+{
+    sysvdirs=()
+    [[ -d /etc/rc.d/init.d ]] && sysvdirs+=(/etc/rc.d/init.d)
+    [[ -d /etc/init.d ]] && sysvdirs+=(/etc/init.d)
+    # Slackware uses /etc/rc.d
+    [[ -f /etc/slackware-version ]] && sysvdirs=(/etc/rc.d)
+    return 0
+}
+
+# This function checks whether we have a given program on the system.
+#
+_have()
+{
+    # Completions for system administrator commands are installed as well in
+    # case completion is attempted via `sudo command ...'.
+    PATH=$PATH:/usr/sbin:/sbin:/usr/local/sbin type $1 &>/dev/null
+}
+
+# Backwards compatibility for compat completions that use have().
+# @deprecated should no longer be used; generally not needed with dynamically
+#             loaded completions, and _have is suitable for runtime use.
+have()
+{
+    unset -v have
+    _have $1 && have=yes
+}
+
+# This function checks whether a given readline variable
+# is `on'.
+#
+_rl_enabled()
+{
+    [[ "$(bind -v)" == *$1+([[:space:]])on* ]]
+}
+
+# This function shell-quotes the argument
+quote()
+{
+    local quoted=${1//\'/\'\\\'\'}
+    printf "'%s'" "$quoted"
+}
+
+# @see _quote_readline_by_ref()
+quote_readline()
+{
+    local ret
+    _quote_readline_by_ref "$1" ret
+    printf %s "$ret"
+} # quote_readline()
+
+# This function shell-dequotes the argument
+dequote()
+{
+    eval printf %s "$1" 2>/dev/null
+}
+
+# Assign variable one scope above the caller
+# Usage: local "$1" && _upvar $1 "value(s)"
+# Param: $1  Variable name to assign value to
+# Param: $*  Value(s) to assign.  If multiple values, an array is
+#            assigned, otherwise a single value is assigned.
+# NOTE: For assigning multiple variables, use '_upvars'.  Do NOT
+#       use multiple '_upvar' calls, since one '_upvar' call might
+#       reassign a variable to be used by another '_upvar' call.
+# See: https://fvue.nl/wiki/Bash:_Passing_variables_by_reference
+_upvar()
+{
+    echo "bash_completion: $FUNCNAME: deprecated function," \
+        "use _upvars instead" >&2
+    if unset -v "$1"; then # Unset & validate varname
+        if (($# == 2)); then
+            eval $1=\"\$2\" # Return single value
+        else
+            eval $1=\(\"\$"{@:2}"\"\) # Return array
+        fi
+    fi
+}
+
+# Assign variables one scope above the caller
+# Usage: local varname [varname ...] &&
+#        _upvars [-v varname value] | [-aN varname [value ...]] ...
+# Available OPTIONS:
+#     -aN  Assign next N values to varname as array
+#     -v   Assign single value to varname
+# Return: 1 if error occurs
+# See: https://fvue.nl/wiki/Bash:_Passing_variables_by_reference
+_upvars()
+{
+    if ! (($#)); then
+        echo "bash_completion: $FUNCNAME: usage: $FUNCNAME" \
+            "[-v varname value] | [-aN varname [value ...]] ..." >&2
+        return 2
+    fi
+    while (($#)); do
+        case $1 in
+            -a*)
+                # Error checking
+                [[ ${1#-a} ]] || {
+                    echo "bash_completion: $FUNCNAME:" \
+                        "\`$1': missing number specifier" >&2
+                    return 1
+                }
+                printf %d "${1#-a}" &>/dev/null || {
+                    echo bash_completion: \
+                        "$FUNCNAME: \`$1': invalid number specifier" >&2
+                    return 1
+                }
+                # Assign array of -aN elements
+                [[ "$2" ]] && unset -v "$2" && eval $2=\(\"\$"{@:3:${1#-a}}"\"\) &&
+                    shift $((${1#-a} + 2)) || {
+                    echo bash_completion: \
+                        "$FUNCNAME: \`$1${2+ }$2': missing argument(s)" \
+                        >&2
+                    return 1
+                }
+                ;;
+            -v)
+                # Assign single value
+                [[ "$2" ]] && unset -v "$2" && eval $2=\"\$3\" &&
+                    shift 3 || {
+                    echo "bash_completion: $FUNCNAME: $1:" \
+                        "missing argument(s)" >&2
+                    return 1
+                }
+                ;;
+            *)
+                echo "bash_completion: $FUNCNAME: $1: invalid option" >&2
+                return 1
+                ;;
+        esac
+    done
+}
+
+# Reassemble command line words, excluding specified characters from the
+# list of word completion separators (COMP_WORDBREAKS).
+# @param $1 chars  Characters out of $COMP_WORDBREAKS which should
+#     NOT be considered word breaks. This is useful for things like scp where
+#     we want to return host:path and not only path, so we would pass the
+#     colon (:) as $1 here.
+# @param $2 words  Name of variable to return words to
+# @param $3 cword  Name of variable to return cword to
+#
+__reassemble_comp_words_by_ref()
+{
+    local exclude i j line ref
+    # Exclude word separator characters?
+    if [[ $1 ]]; then
+        # Yes, exclude word separator characters;
+        # Exclude only those characters, which were really included
+        exclude="[${1//[^$COMP_WORDBREAKS]/}]"
+    fi
+
+    # Default to cword unchanged
+    printf -v "$3" %s "$COMP_CWORD"
+    # Are characters excluded which were former included?
+    if [[ -v exclude ]]; then
+        # Yes, list of word completion separators has shrunk;
+        line=$COMP_LINE
+        # Re-assemble words to complete
+        for ((i = 0, j = 0; i < ${#COMP_WORDS[@]}; i++, j++)); do
+            # Is current word not word 0 (the command itself) and is word not
+            # empty and is word made up of just word separator characters to
+            # be excluded and is current word not preceded by whitespace in
+            # original line?
+            while [[ $i -gt 0 && ${COMP_WORDS[i]} == +($exclude) ]]; do
+                # Is word separator not preceded by whitespace in original line
+                # and are we not going to append to word 0 (the command
+                # itself), then append to current word.
+                [[ $line != [[:blank:]]* ]] && ((j >= 2)) && ((j--))
+                # Append word separator to current or new word
+                ref="$2[$j]"
+                printf -v "$ref" %s "${!ref-}${COMP_WORDS[i]}"
+                # Indicate new cword
+                ((i == COMP_CWORD)) && printf -v "$3" %s "$j"
+                # Remove optional whitespace + word separator from line copy
+                line=${line#*"${COMP_WORDS[i]}"}
+                # Start new word if word separator in original line is
+                # followed by whitespace.
+                [[ $line == [[:blank:]]* ]] && ((j++))
+                # Indicate next word if available, else end *both* while and
+                # for loop
+                ((i < ${#COMP_WORDS[@]} - 1)) && ((i++)) || break 2
+            done
+            # Append word to current word
+            ref="$2[$j]"
+            printf -v "$ref" %s "${!ref-}${COMP_WORDS[i]}"
+            # Remove optional whitespace + word from line copy
+            line=${line#*"${COMP_WORDS[i]}"}
+            # Indicate new cword
+            ((i == COMP_CWORD)) && printf -v "$3" %s "$j"
+        done
+        ((i == COMP_CWORD)) && printf -v "$3" %s "$j"
+    else
+        # No, list of word completions separators hasn't changed;
+        for i in "${!COMP_WORDS[@]}"; do
+            printf -v "$2[i]" %s "${COMP_WORDS[i]}"
+        done
+    fi
+} # __reassemble_comp_words_by_ref()
+
+# @param $1 exclude  Characters out of $COMP_WORDBREAKS which should NOT be
+#     considered word breaks. This is useful for things like scp where
+#     we want to return host:path and not only path, so we would pass the
+#     colon (:) as $1 in this case.
+# @param $2 words  Name of variable to return words to
+# @param $3 cword  Name of variable to return cword to
+# @param $4 cur  Name of variable to return current word to complete to
+# @see __reassemble_comp_words_by_ref()
+__get_cword_at_cursor_by_ref()
+{
+    local cword words=()
+    __reassemble_comp_words_by_ref "$1" words cword
+
+    local i cur="" index=$COMP_POINT lead=${COMP_LINE:0:COMP_POINT}
+    # Cursor not at position 0 and not leaded by just space(s)?
+    if [[ $index -gt 0 && ($lead && ${lead//[[:space:]]/}) ]]; then
+        cur=$COMP_LINE
+        for ((i = 0; i <= cword; ++i)); do
+            # Current word fits in $cur, and $cur doesn't match cword?
+            while [[ ${#cur} -ge ${#words[i]} && \
+                ${cur:0:${#words[i]}} != "${words[i]-}" ]]; do
+                # Strip first character
+                cur="${cur:1}"
+                # Decrease cursor position, staying >= 0
+                ((index > 0)) && ((index--))
+            done
+
+            # Does found word match cword?
+            if ((i < cword)); then
+                # No, cword lies further;
+                local old_size=${#cur}
+                cur="${cur#"${words[i]}"}"
+                local new_size=${#cur}
+                ((index -= old_size - new_size))
+            fi
+        done
+        # Clear $cur if just space(s)
+        [[ $cur && ! ${cur//[[:space:]]/} ]] && cur=
+        # Zero $index if negative
+        ((index < 0)) && index=0
+    fi
+
+    local "$2" "$3" "$4" && _upvars -a${#words[@]} $2 ${words+"${words[@]}"} \
+        -v $3 "$cword" -v $4 "${cur:0:index}"
+}
+
+# Get the word to complete and optional previous words.
+# This is nicer than ${COMP_WORDS[COMP_CWORD]}, since it handles cases
+# where the user is completing in the middle of a word.
+# (For example, if the line is "ls foobar",
+# and the cursor is here -------->   ^
+# Also one is able to cross over possible wordbreak characters.
+# Usage: _get_comp_words_by_ref [OPTIONS] [VARNAMES]
+# Available VARNAMES:
+#     cur         Return cur via $cur
+#     prev        Return prev via $prev
+#     words       Return words via $words
+#     cword       Return cword via $cword
+#
+# Available OPTIONS:
+#     -n EXCLUDE  Characters out of $COMP_WORDBREAKS which should NOT be
+#                 considered word breaks. This is useful for things like scp
+#                 where we want to return host:path and not only path, so we
+#                 would pass the colon (:) as -n option in this case.
+#     -c VARNAME  Return cur via $VARNAME
+#     -p VARNAME  Return prev via $VARNAME
+#     -w VARNAME  Return words via $VARNAME
+#     -i VARNAME  Return cword via $VARNAME
+#
+# Example usage:
+#
+#    $ _get_comp_words_by_ref -n : cur prev
+#
+_get_comp_words_by_ref()
+{
+    local exclude flag i OPTIND=1
+    local cur cword words=()
+    local upargs=() upvars=() vcur vcword vprev vwords
+
+    while getopts "c:i:n:p:w:" flag "$@"; do
+        case $flag in
+            c) vcur=$OPTARG ;;
+            i) vcword=$OPTARG ;;
+            n) exclude=$OPTARG ;;
+            p) vprev=$OPTARG ;;
+            w) vwords=$OPTARG ;;
+            *)
+                echo "bash_completion: $FUNCNAME: usage error" >&2
+                return 1
+                ;;
+        esac
+    done
+    while [[ $# -ge $OPTIND ]]; do
+        case ${!OPTIND} in
+            cur) vcur=cur ;;
+            prev) vprev=prev ;;
+            cword) vcword=cword ;;
+            words) vwords=words ;;
+            *)
+                echo "bash_completion: $FUNCNAME: \`${!OPTIND}':" \
+                    "unknown argument" >&2
+                return 1
+                ;;
+        esac
+        ((OPTIND += 1))
+    done
+
+    __get_cword_at_cursor_by_ref "${exclude-}" words cword cur
+
+    [[ -v vcur ]] && {
+        upvars+=("$vcur")
+        upargs+=(-v $vcur "$cur")
+    }
+    [[ -v vcword ]] && {
+        upvars+=("$vcword")
+        upargs+=(-v $vcword "$cword")
+    }
+    [[ -v vprev && $cword -ge 1 ]] && {
+        upvars+=("$vprev")
+        upargs+=(-v $vprev "${words[cword - 1]}")
+    }
+    [[ -v vwords ]] && {
+        upvars+=("$vwords")
+        upargs+=(-a${#words[@]} $vwords ${words+"${words[@]}"})
+    }
+
+    ((${#upvars[@]})) && local "${upvars[@]}" && _upvars "${upargs[@]}"
+}
+
+# Get the word to complete.
+# This is nicer than ${COMP_WORDS[COMP_CWORD]}, since it handles cases
+# where the user is completing in the middle of a word.
+# (For example, if the line is "ls foobar",
+# and the cursor is here -------->   ^
+# @param $1 string  Characters out of $COMP_WORDBREAKS which should NOT be
+#     considered word breaks. This is useful for things like scp where
+#     we want to return host:path and not only path, so we would pass the
+#     colon (:) as $1 in this case.
+# @param $2 integer  Index number of word to return, negatively offset to the
+#     current word (default is 0, previous is 1), respecting the exclusions
+#     given at $1.  For example, `_get_cword "=:" 1' returns the word left of
+#     the current word, respecting the exclusions "=:".
+# @deprecated  Use `_get_comp_words_by_ref cur' instead
+# @see _get_comp_words_by_ref()
+_get_cword()
+{
+    local LC_CTYPE=C
+    local cword words
+    __reassemble_comp_words_by_ref "${1-}" words cword
+
+    # return previous word offset by $2
+    if [[ ${2-} && ${2//[^0-9]/} ]]; then
+        printf "%s" "${words[cword - $2]}"
+    elif ((${#words[cword]} == 0 && COMP_POINT == ${#COMP_LINE})); then
+        : # nothing
+    else
+        local i
+        local cur="$COMP_LINE"
+        local index="$COMP_POINT"
+        for ((i = 0; i <= cword; ++i)); do
+            # Current word fits in $cur, and $cur doesn't match cword?
+            while [[ ${#cur} -ge ${#words[i]} && \
+                ${cur:0:${#words[i]}} != "${words[i]}" ]]; do
+                # Strip first character
+                cur="${cur:1}"
+                # Decrease cursor position, staying >= 0
+                ((index > 0)) && ((index--))
+            done
+
+            # Does found word match cword?
+            if ((i < cword)); then
+                # No, cword lies further;
+                local old_size="${#cur}"
+                cur="${cur#${words[i]}}"
+                local new_size="${#cur}"
+                ((index -= old_size - new_size))
+            fi
+        done
+
+        if [[ ${words[cword]:0:${#cur}} != "$cur" ]]; then
+            # We messed up! At least return the whole word so things
+            # keep working
+            printf "%s" "${words[cword]}"
+        else
+            printf "%s" "${cur:0:index}"
+        fi
+    fi
+} # _get_cword()
+
+# Get word previous to the current word.
+# This is a good alternative to `prev=${COMP_WORDS[COMP_CWORD-1]}' because bash4
+# will properly return the previous word with respect to any given exclusions to
+# COMP_WORDBREAKS.
+# @deprecated  Use `_get_comp_words_by_ref cur prev' instead
+# @see _get_comp_words_by_ref()
+#
+_get_pword()
+{
+    if ((COMP_CWORD >= 1)); then
+        _get_cword "${@:-}" 1
+    fi
+}
+
+# If the word-to-complete contains a colon (:), left-trim COMPREPLY items with
+# word-to-complete.
+# With a colon in COMP_WORDBREAKS, words containing
+# colons are always completed as entire words if the word to complete contains
+# a colon.  This function fixes this, by removing the colon-containing-prefix
+# from COMPREPLY items.
+# The preferred solution is to remove the colon (:) from COMP_WORDBREAKS in
+# your .bashrc:
+#
+#    # Remove colon (:) from list of word completion separators
+#    COMP_WORDBREAKS=${COMP_WORDBREAKS//:}
+#
+# See also: Bash FAQ - E13) Why does filename completion misbehave if a colon
+# appears in the filename? - https://tiswww.case.edu/php/chet/bash/FAQ
+# @param $1 current word to complete (cur)
+# @modifies global array $COMPREPLY
+#
+__ltrim_colon_completions()
+{
+    if [[ $1 == *:* && $COMP_WORDBREAKS == *:* ]]; then
+        # Remove colon-word prefix from COMPREPLY items
+        local colon_word=${1%"${1##*:}"}
+        local i=${#COMPREPLY[*]}
+        while ((i-- > 0)); do
+            COMPREPLY[i]=${COMPREPLY[i]#"$colon_word"}
+        done
+    fi
+} # __ltrim_colon_completions()
+
+# This function quotes the argument in a way so that readline dequoting
+# results in the original argument.  This is necessary for at least
+# `compgen' which requires its arguments quoted/escaped:
+#
+#     $ ls "a'b/"
+#     c
+#     $ compgen -f "a'b/"       # Wrong, doesn't return output
+#     $ compgen -f "a\'b/"      # Good
+#     a\'b/c
+#
+# See also:
+# - https://lists.gnu.org/archive/html/bug-bash/2009-03/msg00155.html
+# - https://www.mail-archive.com/bash-completion-devel@lists.alioth.debian.org/msg01944.html
+# @param $1  Argument to quote
+# @param $2  Name of variable to return result to
+_quote_readline_by_ref()
+{
+    if [[ $1 == \'* ]]; then
+        # Leave out first character
+        printf -v $2 %s "${1:1}"
+    else
+        printf -v $2 %q "$1"
+    fi
+
+    # If result becomes quoted like this: $'string', re-evaluate in order to
+    # drop the additional quoting.  See also:
+    # https://www.mail-archive.com/bash-completion-devel@lists.alioth.debian.org/msg01942.html
+    [[ ${!2} == \$* ]] && eval $2=${!2}
+} # _quote_readline_by_ref()
+
+# This function performs file and directory completion. It's better than
+# simply using 'compgen -f', because it honours spaces in filenames.
+# @param $1  If `-d', complete only on directories.  Otherwise filter/pick only
+#            completions with `.$1' and the uppercase version of it as file
+#            extension.
+#
+_filedir()
+{
+    local IFS=$'\n'
+
+    _tilde "${cur-}" || return
+
+    local -a toks
+    local reset arg=${1-}
+
+    if [[ $arg == -d ]]; then
+        reset=$(shopt -po noglob)
+        set -o noglob
+        toks=($(compgen -d -- "${cur-}"))
+        IFS=' '
+        $reset
+        IFS=$'\n'
+    else
+        local quoted
+        _quote_readline_by_ref "${cur-}" quoted
+
+        # Munge xspec to contain uppercase version too
+        # https://lists.gnu.org/archive/html/bug-bash/2010-09/msg00036.html
+        # news://news.gmane.io/4C940E1C.1010304@case.edu
+        local xspec=${arg:+"!*.@($arg|${arg^^})"} plusdirs=()
+
+        # Use plusdirs to get dir completions if we have a xspec; if we don't,
+        # there's no need, dirs come along with other completions. Don't use
+        # plusdirs quite yet if fallback is in use though, in order to not ruin
+        # the fallback condition with the "plus" dirs.
+        local opts=(-f -X "$xspec")
+        [[ $xspec ]] && plusdirs=(-o plusdirs)
+        [[ ${COMP_FILEDIR_FALLBACK-} || -z ${plusdirs-} ]] ||
+            opts+=("${plusdirs[@]}")
+
+        reset=$(shopt -po noglob)
+        set -o noglob
+        toks+=($(compgen "${opts[@]}" -- $quoted))
+        IFS=' '
+        $reset
+        IFS=$'\n'
+
+        # Try without filter if it failed to produce anything and configured to
+        [[ -n ${COMP_FILEDIR_FALLBACK-} && -n $arg && ${#toks[@]} -lt 1 ]] && {
+            reset=$(shopt -po noglob)
+            set -o noglob
+            toks+=($(compgen -f ${plusdirs+"${plusdirs[@]}"} -- $quoted))
+            IFS=' '
+            $reset
+            IFS=$'\n'
+        }
+    fi
+
+    if ((${#toks[@]} != 0)); then
+        # 2>/dev/null for direct invocation, e.g. in the _filedir unit test
+        compopt -o filenames 2>/dev/null
+        COMPREPLY+=("${toks[@]}")
+    fi
+} # _filedir()
+
+# This function splits $cur=--foo=bar into $prev=--foo, $cur=bar, making it
+# easier to support both "--foo bar" and "--foo=bar" style completions.
+# `=' should have been removed from COMP_WORDBREAKS when setting $cur for
+# this to be useful.
+# Returns 0 if current option was split, 1 otherwise.
+#
+_split_longopt()
+{
+    if [[ $cur == --?*=* ]]; then
+        # Cut also backslash before '=' in case it ended up there
+        # for some reason.
+        prev="${cur%%?(\\)=*}"
+        cur="${cur#*=}"
+        return 0
+    fi
+
+    return 1
+}
+
+# Complete variables.
+# @return  True (0) if variables were completed,
+#          False (> 0) if not.
+_variables()
+{
+    if [[ $cur =~ ^(\$(\{[!#]?)?)([A-Za-z0-9_]*)$ ]]; then
+        # Completing $var / ${var / ${!var / ${#var
+        if [[ $cur == '${'* ]]; then
+            local arrs vars
+            vars=($(compgen -A variable -P ${BASH_REMATCH[1]} -S '}' -- ${BASH_REMATCH[3]}))
+            arrs=($(compgen -A arrayvar -P ${BASH_REMATCH[1]} -S '[' -- ${BASH_REMATCH[3]}))
+            if ((${#vars[@]} == 1 && ${#arrs[@]} != 0)); then
+                # Complete ${arr with ${array[ if there is only one match, and that match is an array variable
+                compopt -o nospace
+                COMPREPLY+=(${arrs[*]})
+            else
+                # Complete ${var with ${variable}
+                COMPREPLY+=(${vars[*]})
+            fi
+        else
+            # Complete $var with $variable
+            COMPREPLY+=($(compgen -A variable -P '$' -- "${BASH_REMATCH[3]}"))
+        fi
+        return 0
+    elif [[ $cur =~ ^(\$\{[#!]?)([A-Za-z0-9_]*)\[([^]]*)$ ]]; then
+        # Complete ${array[i with ${array[idx]}
+        local IFS=$'\n'
+        COMPREPLY+=($(compgen -W '$(printf %s\\n "${!'${BASH_REMATCH[2]}'[@]}")' \
+            -P "${BASH_REMATCH[1]}${BASH_REMATCH[2]}[" -S ']}' -- "${BASH_REMATCH[3]}"))
+        # Complete ${arr[@ and ${arr[*
+        if [[ ${BASH_REMATCH[3]} == [@*] ]]; then
+            COMPREPLY+=("${BASH_REMATCH[1]}${BASH_REMATCH[2]}[${BASH_REMATCH[3]}]}")
+        fi
+        __ltrim_colon_completions "$cur" # array indexes may have colons
+        return 0
+    elif [[ $cur =~ ^\$\{[#!]?[A-Za-z0-9_]*\[.*\]$ ]]; then
+        # Complete ${array[idx] with ${array[idx]}
+        COMPREPLY+=("$cur}")
+        __ltrim_colon_completions "$cur"
+        return 0
+    else
+        case ${prev-} in
+            TZ)
+                cur=/usr/share/zoneinfo/$cur
+                _filedir
+                for i in "${!COMPREPLY[@]}"; do
+                    if [[ ${COMPREPLY[i]} == *.tab ]]; then
+                        unset 'COMPREPLY[i]'
+                        continue
+                    elif [[ -d ${COMPREPLY[i]} ]]; then
+                        COMPREPLY[i]+=/
+                        compopt -o nospace
+                    fi
+                    COMPREPLY[i]=${COMPREPLY[i]#/usr/share/zoneinfo/}
+                done
+                return 0
+                ;;
+            TERM)
+                _terms
+                return 0
+                ;;
+            LANG | LC_*)
+                COMPREPLY=($(compgen -W '$(locale -a 2>/dev/null)' \
+                    -- "$cur"))
+                return 0
+                ;;
+        esac
+    fi
+    return 1
+}
+
+# Initialize completion and deal with various general things: do file
+# and variable completion where appropriate, and adjust prev, words,
+# and cword as if no redirections exist so that completions do not
+# need to deal with them.  Before calling this function, make sure
+# cur, prev, words, and cword are local, ditto split if you use -s.
+#
+# Options:
+#     -n EXCLUDE  Passed to _get_comp_words_by_ref -n with redirection chars
+#     -e XSPEC    Passed to _filedir as first arg for stderr redirections
+#     -o XSPEC    Passed to _filedir as first arg for other output redirections
+#     -i XSPEC    Passed to _filedir as first arg for stdin redirections
+#     -s          Split long options with _split_longopt, implies -n =
+# @return  True (0) if completion needs further processing,
+#          False (> 0) no further processing is necessary.
+#
+_init_completion()
+{
+    local exclude="" flag outx errx inx OPTIND=1
+
+    while getopts "n:e:o:i:s" flag "$@"; do
+        case $flag in
+            n) exclude+=$OPTARG ;;
+            e) errx=$OPTARG ;;
+            o) outx=$OPTARG ;;
+            i) inx=$OPTARG ;;
+            s)
+                split=false
+                exclude+==
+                ;;
+            *)
+                echo "bash_completion: $FUNCNAME: usage error" >&2
+                return 1
+                ;;
+        esac
+    done
+
+    COMPREPLY=()
+    local redir="@(?([0-9])<|?([0-9&])>?(>)|>&)"
+    _get_comp_words_by_ref -n "$exclude<>&" cur prev words cword
+
+    # Complete variable names.
+    _variables && return 1
+
+    # Complete on files if current is a redirect possibly followed by a
+    # filename, e.g. ">foo", or previous is a "bare" redirect, e.g. ">".
+    # shellcheck disable=SC2053
+    if [[ $cur == $redir* || ${prev-} == $redir ]]; then
+        local xspec
+        case $cur in
+            2'>'*) xspec=${errx-} ;;
+            *'>'*) xspec=${outx-} ;;
+            *'<'*) xspec=${inx-} ;;
+            *)
+                case $prev in
+                    2'>'*) xspec=${errx-} ;;
+                    *'>'*) xspec=${outx-} ;;
+                    *'<'*) xspec=${inx-} ;;
+                esac
+                ;;
+        esac
+        cur="${cur##$redir}"
+        _filedir $xspec
+        return 1
+    fi
+
+    # Remove all redirections so completions don't have to deal with them.
+    local i skip
+    for ((i = 1; i < ${#words[@]}; )); do
+        if [[ ${words[i]} == $redir* ]]; then
+            # If "bare" redirect, remove also the next word (skip=2).
+            # shellcheck disable=SC2053
+            [[ ${words[i]} == $redir ]] && skip=2 || skip=1
+            words=("${words[@]:0:i}" "${words[@]:i+skip}")
+            ((i <= cword)) && ((cword -= skip))
+        else
+            ((i++))
+        fi
+    done
+
+    ((cword <= 0)) && return 1
+    prev=${words[cword - 1]}
+
+    [[ ${split-} ]] && _split_longopt && split=true
+
+    return 0
+}
+
+# Helper function for _parse_help and _parse_usage.
+__parse_options()
+{
+    local option option2 i IFS=$' \t\n,/|'
+
+    # Take first found long option, or first one (short) if not found.
+    option=
+    local -a array=($1)
+    for i in "${array[@]}"; do
+        case "$i" in
+            ---*) break ;;
+            --?*)
+                option=$i
+                break
+                ;;
+            -?*) [[ $option ]] || option=$i ;;
+            *) break ;;
+        esac
+    done
+    [[ $option ]] || return 0
+
+    IFS=$' \t\n' # affects parsing of the regexps below...
+
+    # Expand --[no]foo to --foo and --nofoo etc
+    if [[ $option =~ (\[((no|dont)-?)\]). ]]; then
+        option2=${option/"${BASH_REMATCH[1]}"/}
+        option2=${option2%%[<{().[]*}
+        printf '%s\n' "${option2/=*/=}"
+        option=${option/"${BASH_REMATCH[1]}"/"${BASH_REMATCH[2]}"}
+    fi
+
+    option=${option%%[<{().[]*}
+    printf '%s\n' "${option/=*/=}"
+}
+
+# Parse GNU style help output of the given command.
+# @param $1  command; if "-", read from stdin and ignore rest of args
+# @param $2  command options (default: --help)
+#
+_parse_help()
+{
+    eval local cmd="$(quote "$1")"
+    local line
+    {
+        case $cmd in
+            -) cat ;;
+            *) LC_ALL=C "$(dequote "$cmd")" ${2:---help} 2>&1 ;;
+        esac
+    } |
+        while read -r line; do
+
+            [[ $line == *([[:blank:]])-* ]] || continue
+            # transform "-f FOO, --foo=FOO" to "-f , --foo=FOO" etc
+            while [[ $line =~ \
+                ((^|[^-])-[A-Za-z0-9?][[:space:]]+)\[?[A-Z0-9]+([,_-]+[A-Z0-9]+)?(\.\.+)?\]? ]]; do
+                line=${line/"${BASH_REMATCH[0]}"/"${BASH_REMATCH[1]}"}
+            done
+            __parse_options "${line// or /, }"
+
+        done
+}
+
+# Parse BSD style usage output (options in brackets) of the given command.
+# @param $1  command; if "-", read from stdin and ignore rest of args
+# @param $2  command options (default: --usage)
+#
+_parse_usage()
+{
+    eval local cmd="$(quote "$1")"
+    local line match option i char
+    {
+        case $cmd in
+            -) cat ;;
+            *) LC_ALL=C "$(dequote "$cmd")" ${2:---usage} 2>&1 ;;
+        esac
+    } |
+        while read -r line; do
+
+            while [[ $line =~ \[[[:space:]]*(-[^]]+)[[:space:]]*\] ]]; do
+                match=${BASH_REMATCH[0]}
+                option=${BASH_REMATCH[1]}
+                case $option in
+                    -?(\[)+([a-zA-Z0-9?]))
+                        # Treat as bundled short options
+                        for ((i = 1; i < ${#option}; i++)); do
+                            char=${option:i:1}
+                            [[ $char != '[' ]] && printf '%s\n' -$char
+                        done
+                        ;;
+                    *)
+                        __parse_options "$option"
+                        ;;
+                esac
+                line=${line#*"$match"}
+            done
+
+        done
+}
+
+# This function completes on signal names (minus the SIG prefix)
+# @param $1 prefix
+_signals()
+{
+    local -a sigs=($(compgen -P "${1-}" -A signal "SIG${cur#${1-}}"))
+    COMPREPLY+=("${sigs[@]/#${1-}SIG/${1-}}")
+}
+
+# This function completes on known mac addresses
+#
+_mac_addresses()
+{
+    local re='\([A-Fa-f0-9]\{2\}:\)\{5\}[A-Fa-f0-9]\{2\}'
+    local PATH="$PATH:/sbin:/usr/sbin"
+
+    # Local interfaces
+    # - ifconfig on Linux: HWaddr or ether
+    # - ifconfig on FreeBSD: ether
+    # - ip link: link/ether
+    COMPREPLY+=($(
+        {
+            LC_ALL=C ifconfig -a || ip link show
+        } 2>/dev/null | command sed -ne \
+            "s/.*[[:space:]]HWaddr[[:space:]]\{1,\}\($re\)[[:space:]].*/\1/p" -ne \
+            "s/.*[[:space:]]HWaddr[[:space:]]\{1,\}\($re\)[[:space:]]*$/\1/p" -ne \
+            "s|.*[[:space:]]\(link/\)\{0,1\}ether[[:space:]]\{1,\}\($re\)[[:space:]].*|\2|p" -ne \
+            "s|.*[[:space:]]\(link/\)\{0,1\}ether[[:space:]]\{1,\}\($re\)[[:space:]]*$|\2|p"
+    ))
+
+    # ARP cache
+    COMPREPLY+=($({
+        arp -an || ip neigh show
+    } 2>/dev/null | command sed -ne \
+        "s/.*[[:space:]]\($re\)[[:space:]].*/\1/p" -ne \
+        "s/.*[[:space:]]\($re\)[[:space:]]*$/\1/p"))
+
+    # /etc/ethers
+    COMPREPLY+=($(command sed -ne \
+        "s/^[[:space:]]*\($re\)[[:space:]].*/\1/p" /etc/ethers 2>/dev/null))
+
+    COMPREPLY=($(compgen -W '${COMPREPLY[@]}' -- "$cur"))
+    __ltrim_colon_completions "$cur"
+}
+
+# This function completes on configured network interfaces
+#
+_configured_interfaces()
+{
+    if [[ -f /etc/debian_version ]]; then
+        # Debian system
+        COMPREPLY=($(compgen -W "$(command sed -ne 's|^iface \([^ ]\{1,\}\).*$|\1|p' \
+            /etc/network/interfaces /etc/network/interfaces.d/* 2>/dev/null)" \
+            -- "$cur"))
+    elif [[ -f /etc/SuSE-release ]]; then
+        # SuSE system
+        COMPREPLY=($(compgen -W "$(printf '%s\n' \
+            /etc/sysconfig/network/ifcfg-* |
+            command sed -ne 's|.*ifcfg-\([^*].*\)$|\1|p')" -- "$cur"))
+    elif [[ -f /etc/pld-release ]]; then
+        # PLD Linux
+        COMPREPLY=($(compgen -W "$(command ls -B \
+            /etc/sysconfig/interfaces |
+            command sed -ne 's|.*ifcfg-\([^*].*\)$|\1|p')" -- "$cur"))
+    else
+        # Assume Red Hat
+        COMPREPLY=($(compgen -W "$(printf '%s\n' \
+            /etc/sysconfig/network-scripts/ifcfg-* |
+            command sed -ne 's|.*ifcfg-\([^*].*\)$|\1|p')" -- "$cur"))
+    fi
+}
+
+# Local IP addresses.
+# -4: IPv4 addresses only (default)
+# -6: IPv6 addresses only
+# -a: All addresses
+#
+_ip_addresses()
+{
+    local n
+    case ${1-} in
+        -a) n='6\?' ;;
+        -6) n='6' ;;
+        *) n= ;;
+    esac
+    local PATH=$PATH:/sbin
+    local addrs=$({
+        LC_ALL=C ifconfig -a || ip addr show
+    } 2>/dev/null |
+        command sed -e 's/[[:space:]]addr:/ /' -ne \
+            "s|.*inet${n}[[:space:]]\{1,\}\([^[:space:]/]*\).*|\1|p")
+    COMPREPLY+=($(compgen -W "$addrs" -- "${cur-}"))
+}
+
+# This function completes on available kernels
+#
+_kernel_versions()
+{
+    COMPREPLY=($(compgen -W '$(command ls /lib/modules)' -- "$cur"))
+}
+
+# This function completes on all available network interfaces
+# -a: restrict to active interfaces only
+# -w: restrict to wireless interfaces only
+#
+_available_interfaces()
+{
+    local PATH=$PATH:/sbin
+
+    COMPREPLY=($({
+        if [[ ${1:-} == -w ]]; then
+            iwconfig
+        elif [[ ${1:-} == -a ]]; then
+            ifconfig || ip link show up
+        else
+            ifconfig -a || ip link show
+        fi
+    } 2>/dev/null | awk \
+        '/^[^ \t]/ { if ($1 ~ /^[0-9]+:/) { print $2 } else { print $1 } }'))
+
+    COMPREPLY=($(compgen -W '${COMPREPLY[@]/%[[:punct:]]/}' -- "$cur"))
+}
+
+# Echo number of CPUs, falling back to 1 on failure.
+_ncpus()
+{
+    local var=NPROCESSORS_ONLN
+    [[ $OSTYPE == *linux* ]] && var=_$var
+    local n=$(getconf $var 2>/dev/null)
+    printf %s ${n:-1}
+}
+
+# Perform tilde (~) completion
+# @return  True (0) if completion needs further processing,
+#          False (> 0) if tilde is followed by a valid username, completions
+#          are put in COMPREPLY and no further processing is necessary.
+_tilde()
+{
+    local result=0
+    if [[ ${1-} == \~* && $1 != */* ]]; then
+        # Try generate ~username completions
+        COMPREPLY=($(compgen -P '~' -u -- "${1#\~}"))
+        result=${#COMPREPLY[@]}
+        # 2>/dev/null for direct invocation, e.g. in the _tilde unit test
+        ((result > 0)) && compopt -o filenames 2>/dev/null
+    fi
+    return $result
+}
+
+# Expand variable starting with tilde (~)
+# We want to expand ~foo/... to /home/foo/... to avoid problems when
+# word-to-complete starting with a tilde is fed to commands and ending up
+# quoted instead of expanded.
+# Only the first portion of the variable from the tilde up to the first slash
+# (~../) is expanded.  The remainder of the variable, containing for example
+# a dollar sign variable ($) or asterisk (*) is not expanded.
+# Example usage:
+#
+#    $ v="~"; __expand_tilde_by_ref v; echo "$v"
+#
+# Example output:
+#
+#       v                  output
+#    --------         ----------------
+#    ~                /home/user
+#    ~foo/bar         /home/foo/bar
+#    ~foo/$HOME       /home/foo/$HOME
+#    ~foo/a  b        /home/foo/a  b
+#    ~foo/*           /home/foo/*
+#
+# @param $1  Name of variable (not the value of the variable) to expand
+__expand_tilde_by_ref()
+{
+    if [[ ${!1-} == \~* ]]; then
+        eval $1="$(printf ~%q "${!1#\~}")"
+    fi
+} # __expand_tilde_by_ref()
+
+# This function expands tildes in pathnames
+#
+_expand()
+{
+    # Expand ~username type directory specifications.  We want to expand
+    # ~foo/... to /home/foo/... to avoid problems when $cur starting with
+    # a tilde is fed to commands and ending up quoted instead of expanded.
+
+    case ${cur-} in
+        ~*/*)
+            __expand_tilde_by_ref cur
+            ;;
+        ~*)
+            _tilde "$cur" ||
+                eval COMPREPLY[0]="$(printf ~%q "${COMPREPLY[0]#\~}")"
+            return ${#COMPREPLY[@]}
+            ;;
+    esac
+}
+
+# Process ID related functions.
+# for AIX and Solaris we use X/Open syntax, BSD for others.
+if [[ $OSTYPE == *@(solaris|aix)* ]]; then
+    # This function completes on process IDs.
+    _pids()
+    {
+        COMPREPLY=($(compgen -W '$(command ps -efo pid | command sed 1d)' -- "$cur"))
+    }
+
+    _pgids()
+    {
+        COMPREPLY=($(compgen -W '$(command ps -efo pgid | command sed 1d)' -- "$cur"))
+    }
+    _pnames()
+    {
+        COMPREPLY=($(compgen -X '<defunct>' -W '$(command ps -efo comm | \
+        command sed -e 1d -e "s:.*/::" -e "s/^-//" | sort -u)' -- "$cur"))
+    }
+else
+    _pids()
+    {
+        COMPREPLY=($(compgen -W '$(command ps axo pid=)' -- "$cur"))
+    }
+    _pgids()
+    {
+        COMPREPLY=($(compgen -W '$(command ps axo pgid=)' -- "$cur"))
+    }
+    # @param $1 if -s, don't try to avoid truncated command names
+    _pnames()
+    {
+        local -a procs
+        if [[ ${1-} == -s ]]; then
+            procs=($(command ps axo comm | command sed -e 1d))
+        else
+            local line i=-1 ifs=$IFS
+            IFS=$'\n'
+            local -a psout=($(command ps axo command=))
+            IFS=$ifs
+            for line in "${psout[@]}"; do
+                if ((i == -1)); then
+                    # First line, see if it has COMMAND column header. For example
+                    # the busybox ps does that, i.e. doesn't respect axo command=
+                    if [[ $line =~ ^(.*[[:space:]])COMMAND([[:space:]]|$) ]]; then
+                        # It does; store its index.
+                        i=${#BASH_REMATCH[1]}
+                    else
+                        # Nope, fall through to "regular axo command=" parsing.
+                        break
+                    fi
+                else
+                    #
+                    line=${line:i}   # take command starting from found index
+                    line=${line%% *} # trim arguments
+                    procs+=($line)
+                fi
+            done
+            if ((i == -1)); then
+                # Regular axo command= parsing
+                for line in "${psout[@]}"; do
+                    if [[ $line =~ ^[[(](.+)[])]$ ]]; then
+                        procs+=(${BASH_REMATCH[1]})
+                    else
+                        line=${line%% *}      # trim arguments
+                        line=${line##@(*/|-)} # trim leading path and -
+                        procs+=($line)
+                    fi
+                done
+            fi
+        fi
+        COMPREPLY=($(compgen -X "<defunct>" -W '${procs[@]}' -- "$cur"))
+    }
+fi
+
+# This function completes on user IDs
+#
+_uids()
+{
+    if type getent &>/dev/null; then
+        COMPREPLY=($(compgen -W '$(getent passwd | cut -d: -f3)' -- "$cur"))
+    elif type perl &>/dev/null; then
+        COMPREPLY=($(compgen -W '$(perl -e '"'"'while (($uid) = (getpwent)[2]) { print $uid . "\n" }'"'"')' -- "$cur"))
+    else
+        # make do with /etc/passwd
+        COMPREPLY=($(compgen -W '$(cut -d: -f3 /etc/passwd)' -- "$cur"))
+    fi
+}
+
+# This function completes on group IDs
+#
+_gids()
+{
+    if type getent &>/dev/null; then
+        COMPREPLY=($(compgen -W '$(getent group | cut -d: -f3)' -- "$cur"))
+    elif type perl &>/dev/null; then
+        COMPREPLY=($(compgen -W '$(perl -e '"'"'while (($gid) = (getgrent)[2]) { print $gid . "\n" }'"'"')' -- "$cur"))
+    else
+        # make do with /etc/group
+        COMPREPLY=($(compgen -W '$(cut -d: -f3 /etc/group)' -- "$cur"))
+    fi
+}
+
+# Glob for matching various backup files.
+#
+_backup_glob='@(#*#|*@(~|.@(bak|orig|rej|swp|dpkg*|rpm@(orig|new|save))))'
+
+# Complete on xinetd services
+#
+_xinetd_services()
+{
+    local xinetddir=${BASHCOMP_XINETDDIR:-/etc/xinetd.d}
+    if [[ -d $xinetddir ]]; then
+        local IFS=$' \t\n' reset=$(shopt -p nullglob)
+        shopt -s nullglob
+        local -a svcs=($(printf '%s\n' $xinetddir/!($_backup_glob)))
+        $reset
+        ((!${#svcs[@]})) ||
+            COMPREPLY+=($(compgen -W '${svcs[@]#$xinetddir/}' -- "${cur-}"))
+    fi
+}
+
+# This function completes on services
+#
+_services()
+{
+    local sysvdirs
+    _sysvdirs
+
+    local IFS=$' \t\n' reset=$(shopt -p nullglob)
+    shopt -s nullglob
+    COMPREPLY=(
+        $(printf '%s\n' ${sysvdirs[0]}/!($_backup_glob|functions|README)))
+    $reset
+
+    COMPREPLY+=($({
+        systemctl list-units --full --all ||
+            systemctl list-unit-files
+    } 2>/dev/null |
+        awk '$1 ~ /\.service$/ { sub("\\.service$", "", $1); print $1 }'))
+
+    if [[ -x /sbin/upstart-udev-bridge ]]; then
+        COMPREPLY+=($(initctl list 2>/dev/null | cut -d' ' -f1))
+    fi
+
+    COMPREPLY=($(compgen -W '${COMPREPLY[@]#${sysvdirs[0]}/}' -- "$cur"))
+}
+
+# This completes on a list of all available service scripts for the
+# 'service' command and/or the SysV init.d directory, followed by
+# that script's available commands
+#
+_service()
+{
+    local cur prev words cword
+    _init_completion || return
+
+    # don't complete past 2nd token
+    ((cword > 2)) && return
+
+    if [[ $cword -eq 1 && $prev == ?(*/)service ]]; then
+        _services
+        [[ -e /etc/mandrake-release ]] && _xinetd_services
+    else
+        local sysvdirs
+        _sysvdirs
+        COMPREPLY=($(compgen -W '`command sed -e "y/|/ /" \
+            -ne "s/^.*\(U\|msg_u\)sage.*{\(.*\)}.*$/\2/p" \
+            ${sysvdirs[0]}/${prev##*/} 2>/dev/null` start stop' -- "$cur"))
+    fi
+} &&
+    complete -F _service service
+_sysvdirs
+for svcdir in "${sysvdirs[@]}"; do
+    for svc in $svcdir/!($_backup_glob); do
+        [[ -x $svc ]] && complete -F _service $svc
+    done
+done
+unset svc svcdir sysvdirs
+
+# This function completes on modules
+#
+_modules()
+{
+    local modpath
+    modpath=/lib/modules/$1
+    COMPREPLY=($(compgen -W "$(command ls -RL $modpath 2>/dev/null |
+        command sed -ne 's/^\(.*\)\.k\{0,1\}o\(\.[gx]z\)\{0,1\}$/\1/p')" -- "$cur"))
+}
+
+# This function completes on installed modules
+#
+_installed_modules()
+{
+    COMPREPLY=($(compgen -W "$(PATH="$PATH:/sbin" lsmod |
+        awk '{if (NR != 1) print $1}')" -- "$1"))
+}
+
+# This function completes on user or user:group format; as for chown and cpio.
+#
+# The : must be added manually; it will only complete usernames initially.
+# The legacy user.group format is not supported.
+#
+# @param $1  If -u, only return users/groups the user has access to in
+#            context of current completion.
+_usergroup()
+{
+    if [[ $cur == *\\\\* || $cur == *:*:* ]]; then
+        # Give up early on if something seems horribly wrong.
+        return
+    elif [[ $cur == *\\:* ]]; then
+        # Completing group after 'user\:gr<TAB>'.
+        # Reply with a list of groups prefixed with 'user:', readline will
+        # escape to the colon.
+        local prefix
+        prefix=${cur%%*([^:])}
+        prefix=${prefix//\\/}
+        local mycur="${cur#*[:]}"
+        if [[ ${1-} == -u ]]; then
+            _allowed_groups "$mycur"
+        else
+            local IFS=$'\n'
+            COMPREPLY=($(compgen -g -- "$mycur"))
+        fi
+        COMPREPLY=($(compgen -P "$prefix" -W "${COMPREPLY[@]}"))
+    elif [[ $cur == *:* ]]; then
+        # Completing group after 'user:gr<TAB>'.
+        # Reply with a list of unprefixed groups since readline with split on :
+        # and only replace the 'gr' part
+        local mycur="${cur#*:}"
+        if [[ ${1-} == -u ]]; then
+            _allowed_groups "$mycur"
+        else
+            local IFS=$'\n'
+            COMPREPLY=($(compgen -g -- "$mycur"))
+        fi
+    else
+        # Completing a partial 'usernam<TAB>'.
+        #
+        # Don't suffix with a : because readline will escape it and add a
+        # slash. It's better to complete into 'chown username ' than 'chown
+        # username\:'.
+        if [[ ${1-} == -u ]]; then
+            _allowed_users "$cur"
+        else
+            local IFS=$'\n'
+            COMPREPLY=($(compgen -u -- "$cur"))
+        fi
+    fi
+}
+
+_allowed_users()
+{
+    if _complete_as_root; then
+        local IFS=$'\n'
+        COMPREPLY=($(compgen -u -- "${1:-$cur}"))
+    else
+        local IFS=$'\n '
+        COMPREPLY=($(compgen -W \
+            "$(id -un 2>/dev/null || whoami 2>/dev/null)" -- "${1:-$cur}"))
+    fi
+}
+
+_allowed_groups()
+{
+    if _complete_as_root; then
+        local IFS=$'\n'
+        COMPREPLY=($(compgen -g -- "$1"))
+    else
+        local IFS=$'\n '
+        COMPREPLY=($(compgen -W \
+            "$(id -Gn 2>/dev/null || groups 2>/dev/null)" -- "$1"))
+    fi
+}
+
+# This function completes on valid shells
+#
+_shells()
+{
+    local shell rest
+    while read -r shell rest; do
+        [[ $shell == /* && $shell == "$cur"* ]] && COMPREPLY+=($shell)
+    done 2>/dev/null </etc/shells
+}
+
+# This function completes on valid filesystem types
+#
+_fstypes()
+{
+    local fss
+
+    if [[ -e /proc/filesystems ]]; then
+        # Linux
+        fss="$(cut -d$'\t' -f2 /proc/filesystems)
+             $(awk '! /\*/ { print $NF }' /etc/filesystems 2>/dev/null)"
+    else
+        # Generic
+        fss="$(awk '/^[ \t]*[^#]/ { print $3 }' /etc/fstab 2>/dev/null)
+             $(awk '/^[ \t]*[^#]/ { print $3 }' /etc/mnttab 2>/dev/null)
+             $(awk '/^[ \t]*[^#]/ { print $4 }' /etc/vfstab 2>/dev/null)
+             $(awk '{ print $1 }' /etc/dfs/fstypes 2>/dev/null)
+             $([[ -d /etc/fs ]] && command ls /etc/fs)"
+    fi
+
+    [[ -n $fss ]] && COMPREPLY+=($(compgen -W "$fss" -- "$cur"))
+}
+
+# Get real command.
+# - arg: $1  Command
+# - stdout:  Filename of command in PATH with possible symbolic links resolved.
+#            Empty string if command not found.
+# - return:  True (0) if command found, False (> 0) if not.
+_realcommand()
+{
+    type -P "$1" >/dev/null && {
+        if type -p realpath >/dev/null; then
+            realpath "$(type -P "$1")"
+        elif type -p greadlink >/dev/null; then
+            greadlink -f "$(type -P "$1")"
+        elif type -p readlink >/dev/null; then
+            readlink -f "$(type -P "$1")"
+        else
+            type -P "$1"
+        fi
+    }
+}
+
+# This function returns the first argument, excluding options
+# @param $1 chars  Characters out of $COMP_WORDBREAKS which should
+#     NOT be considered word breaks. See __reassemble_comp_words_by_ref.
+_get_first_arg()
+{
+    local i
+
+    arg=
+    for ((i = 1; i < COMP_CWORD; i++)); do
+        if [[ ${COMP_WORDS[i]} != -* ]]; then
+            arg=${COMP_WORDS[i]}
+            break
+        fi
+    done
+}
+
+# This function counts the number of args, excluding options
+# @param $1 chars  Characters out of $COMP_WORDBREAKS which should
+#     NOT be considered word breaks. See __reassemble_comp_words_by_ref.
+# @param $2 glob   Options whose following argument should not be counted
+# @param $3 glob   Options that should be counted as args
+_count_args()
+{
+    local i cword words
+    __reassemble_comp_words_by_ref "${1-}" words cword
+
+    args=1
+    for ((i = 1; i < cword; i++)); do
+        # shellcheck disable=SC2053
+        if [[ ${words[i]} != -* && ${words[i - 1]} != ${2-} || \
+            ${words[i]} == ${3-} ]]; then
+            ((args++))
+        fi
+    done
+}
+
+# This function completes on PCI IDs
+#
+_pci_ids()
+{
+    COMPREPLY+=($(compgen -W \
+        "$(PATH="$PATH:/sbin" lspci -n | awk '{print $3}')" -- "$cur"))
+}
+
+# This function completes on USB IDs
+#
+_usb_ids()
+{
+    COMPREPLY+=($(compgen -W \
+        "$(PATH="$PATH:/sbin" lsusb | awk '{print $6}')" -- "$cur"))
+}
+
+# CD device names
+_cd_devices()
+{
+    COMPREPLY+=($(compgen -f -d -X "!*/?([amrs])cd*" -- "${cur:-/dev/}"))
+}
+
+# DVD device names
+_dvd_devices()
+{
+    COMPREPLY+=($(compgen -f -d -X "!*/?(r)dvd*" -- "${cur:-/dev/}"))
+}
+
+# TERM environment variable values
+_terms()
+{
+    COMPREPLY+=($(compgen -W "$({
+        command sed -ne 's/^\([^[:space:]#|]\{2,\}\)|.*/\1/p' /etc/termcap
+        {
+            toe -a || toe
+        } | awk '{ print $1 }'
+        find /{etc,lib,usr/lib,usr/share}/terminfo/? -type f -maxdepth 1 |
+            awk -F/ '{ print $NF }'
+    } 2>/dev/null)" -- "$cur"))
+}
+
+_bashcomp_try_faketty()
+{
+    if type unbuffer &>/dev/null; then
+        unbuffer -p "$@"
+    elif script --version 2>&1 | command grep -qF util-linux; then
+        # BSD and Solaris "script" do not seem to have required features
+        script -qaefc "$*" /dev/null
+    else
+        "$@" # no can do, fallback
+    fi
+}
+
+# a little help for FreeBSD ports users
+[[ $OSTYPE == *freebsd* ]] && complete -W 'index search fetch fetch-list
+    extract patch configure build install reinstall deinstall clean
+    clean-depends kernel buildworld' make
+
+# This function provides simple user@host completion
+#
+_user_at_host()
+{
+    local cur prev words cword
+    _init_completion -n : || return
+
+    if [[ $cur == *@* ]]; then
+        _known_hosts_real "$cur"
+    else
+        COMPREPLY=($(compgen -u -S @ -- "$cur"))
+        compopt -o nospace
+    fi
+}
+shopt -u hostcomplete && complete -F _user_at_host talk ytalk finger
+
+# NOTE: Using this function as a helper function is deprecated.  Use
+#       `_known_hosts_real' instead.
+_known_hosts()
+{
+    local cur prev words cword
+    _init_completion -n : || return
+
+    # NOTE: Using `_known_hosts' as a helper function and passing options
+    #       to `_known_hosts' is deprecated: Use `_known_hosts_real' instead.
+    local options
+    [[ ${1-} == -a || ${2-} == -a ]] && options=-a
+    [[ ${1-} == -c || ${2-} == -c ]] && options+=" -c"
+    _known_hosts_real ${options-} -- "$cur"
+} # _known_hosts()
+
+# Helper function to locate ssh included files in configs
+# This function looks for the "Include" keyword in ssh config files and
+# includes them recursively, adding each result to the config variable.
+_included_ssh_config_files()
+{
+    (($# < 1)) &&
+        echo "bash_completion: $FUNCNAME: missing mandatory argument CONFIG" >&2
+    local configfile i f
+    configfile=$1
+
+    local reset=$(shopt -po noglob)
+    set -o noglob
+    local included=($(command sed -ne 's/^[[:blank:]]*[Ii][Nn][Cc][Ll][Uu][Dd][Ee][[:blank:]]\(.*\)$/\1/p' "${configfile}"))
+    $reset
+
+    [[ ${included-} ]] || return
+    for i in "${included[@]}"; do
+        # Check the origin of $configfile to complete relative included paths on included
+        # files according to ssh_config(5):
+        #  "[...] Files without absolute paths are assumed to be in ~/.ssh if included in a user
+        #   configuration file or /etc/ssh if included from the system configuration file.[...]"
+        if ! [[ $i =~ ^\~.*|^\/.* ]]; then
+            if [[ $configfile =~ ^\/etc\/ssh.* ]]; then
+                i="/etc/ssh/$i"
+            else
+                i="$HOME/.ssh/$i"
+            fi
+        fi
+        __expand_tilde_by_ref i
+        # In case the expanded variable contains multiple paths
+        set +o noglob
+        for f in $i; do
+            if [[ -r $f ]]; then
+                config+=("$f")
+                # The Included file is processed to look for Included files in itself
+                _included_ssh_config_files $f
+            fi
+        done
+        $reset
+    done
+} # _included_ssh_config_files()
+
+# Helper function for completing _known_hosts.
+# This function performs host completion based on ssh's config and known_hosts
+# files, as well as hostnames reported by avahi-browse if
+# COMP_KNOWN_HOSTS_WITH_AVAHI is set to a non-empty value.  Also hosts from
+# HOSTFILE (compgen -A hostname) are added, unless
+# COMP_KNOWN_HOSTS_WITH_HOSTFILE is set to an empty value.
+# Usage: _known_hosts_real [OPTIONS] CWORD
+# Options:  -a             Use aliases from ssh config files
+#           -c             Use `:' suffix
+#           -F configfile  Use `configfile' for configuration settings
+#           -p PREFIX      Use PREFIX
+#           -4             Filter IPv6 addresses from results
+#           -6             Filter IPv4 addresses from results
+# Return: Completions, starting with CWORD, are added to COMPREPLY[]
+_known_hosts_real()
+{
+    local configfile flag prefix="" ifs=$IFS
+    local cur suffix="" aliases i host ipv4 ipv6
+    local -a kh tmpkh=() khd=() config=()
+
+    # TODO remove trailing %foo from entries
+
+    local OPTIND=1
+    while getopts "ac46F:p:" flag "$@"; do
+        case $flag in
+            a) aliases='yes' ;;
+            c) suffix=':' ;;
+            F) configfile=$OPTARG ;;
+            p) prefix=$OPTARG ;;
+            4) ipv4=1 ;;
+            6) ipv6=1 ;;
+            *)
+                echo "bash_completion: $FUNCNAME: usage error" >&2
+                return 1
+                ;;
+        esac
+    done
+    if (($# < OPTIND)); then
+        echo "bash_completion: $FUNCNAME: missing mandatory argument CWORD" >&2
+        return 1
+    fi
+    cur=${!OPTIND}
+    ((OPTIND += 1))
+    if (($# >= OPTIND)); then
+        echo "bash_completion: $FUNCNAME($*): unprocessed arguments:" \
+            "$(while (($# >= OPTIND)); do
+                printf '%s ' ${!OPTIND}
+                shift
+            done)" >&2
+        return 1
+    fi
+
+    [[ $cur == *@* ]] && prefix=$prefix${cur%@*}@ && cur=${cur#*@}
+    kh=()
+
+    # ssh config files
+    if [[ -v configfile ]]; then
+        [[ -r $configfile ]] && config+=("$configfile")
+    else
+        for i in /etc/ssh/ssh_config ~/.ssh/config ~/.ssh2/config; do
+            [[ -r $i ]] && config+=("$i")
+        done
+    fi
+
+    local reset=$(shopt -po noglob)
+    set -o noglob
+
+    # "Include" keyword in ssh config files
+    if ((${#config[@]} > 0)); then
+        for i in "${config[@]}"; do
+            _included_ssh_config_files "$i"
+        done
+    fi
+
+    # Known hosts files from configs
+    if ((${#config[@]} > 0)); then
+        local IFS=$'\n'
+        # expand paths (if present) to global and user known hosts files
+        # TODO(?): try to make known hosts files with more than one consecutive
+        #          spaces in their name work (watch out for ~ expansion
+        #          breakage! Alioth#311595)
+        tmpkh=($(awk 'sub("^[ \t]*([Gg][Ll][Oo][Bb][Aa][Ll]|[Uu][Ss][Ee][Rr])[Kk][Nn][Oo][Ww][Nn][Hh][Oo][Ss][Tt][Ss][Ff][Ii][Ll][Ee][ \t]+", "") { print $0 }' "${config[@]}" | sort -u))
+        IFS=$ifs
+    fi
+    if ((${#tmpkh[@]} != 0)); then
+        local j
+        for i in "${tmpkh[@]}"; do
+            # First deal with quoted entries...
+            while [[ $i =~ ^([^\"]*)\"([^\"]*)\"(.*)$ ]]; do
+                i=${BASH_REMATCH[1]}${BASH_REMATCH[3]}
+                j=${BASH_REMATCH[2]}
+                __expand_tilde_by_ref j # Eval/expand possible `~' or `~user'
+                [[ -r $j ]] && kh+=("$j")
+            done
+            # ...and then the rest.
+            for j in $i; do
+                __expand_tilde_by_ref j # Eval/expand possible `~' or `~user'
+                [[ -r $j ]] && kh+=("$j")
+            done
+        done
+    fi
+
+    if [[ ! -v configfile ]]; then
+        # Global and user known_hosts files
+        for i in /etc/ssh/ssh_known_hosts /etc/ssh/ssh_known_hosts2 \
+            /etc/known_hosts /etc/known_hosts2 ~/.ssh/known_hosts \
+            ~/.ssh/known_hosts2; do
+            [[ -r $i ]] && kh+=("$i")
+        done
+        for i in /etc/ssh2/knownhosts ~/.ssh2/hostkeys; do
+            [[ -d $i ]] && khd+=("$i"/*pub)
+        done
+    fi
+
+    # If we have known_hosts files to use
+    if ((${#kh[@]} + ${#khd[@]} > 0)); then
+        if ((${#kh[@]} > 0)); then
+            # https://man.openbsd.org/sshd.8#SSH_KNOWN_HOSTS_FILE_FORMAT
+            for i in "${kh[@]}"; do
+                while read -ra tmpkh; do
+                    ((${#tmpkh[@]} == 0)) && continue
+                    set -- "${tmpkh[@]}"
+                    # Skip entries starting with | (hashed) and # (comment)
+                    [[ $1 == [\|\#]* ]] && continue
+                    # Ignore leading @foo (markers)
+                    [[ $1 == @* ]] && shift
+                    # Split entry on commas
+                    local IFS=,
+                    for host in $1; do
+                        # Skip hosts containing wildcards
+                        [[ $host == *[*?]* ]] && continue
+                        # Remove leading [
+                        host="${host#[}"
+                        # Remove trailing ] + optional :port
+                        host="${host%]?(:+([0-9]))}"
+                        # Add host to candidates
+                        COMPREPLY+=($host)
+                    done
+                    IFS=$ifs
+                done <"$i"
+            done
+            COMPREPLY=($(compgen -W '${COMPREPLY[@]}' -- "$cur"))
+        fi
+        if ((${#khd[@]} > 0)); then
+            # Needs to look for files called
+            # .../.ssh2/key_22_<hostname>.pub
+            # dont fork any processes, because in a cluster environment,
+            # there can be hundreds of hostkeys
+            for i in "${khd[@]}"; do
+                if [[ $i == *key_22_$cur*.pub && -r $i ]]; then
+                    host=${i/#*key_22_/}
+                    host=${host/%.pub/}
+                    COMPREPLY+=($host)
+                fi
+            done
+        fi
+
+        # apply suffix and prefix
+        for i in ${!COMPREPLY[*]}; do
+            COMPREPLY[i]=$prefix${COMPREPLY[i]}$suffix
+        done
+    fi
+
+    # append any available aliases from ssh config files
+    if [[ ${#config[@]} -gt 0 && -v aliases ]]; then
+        local -a hosts=($(command sed -ne 's/^[[:blank:]]*[Hh][Oo][Ss][Tt][[:blank:]]\(.*\)$/\1/p' "${config[@]}"))
+        if ((${#hosts[@]} != 0)); then
+            COMPREPLY+=($(compgen -P "$prefix" \
+                -S "$suffix" -W '${hosts[@]%%[*?%]*}' -X '\!*' -- "$cur"))
+        fi
+    fi
+
+    # Add hosts reported by avahi-browse, if desired and it's available.
+    if [[ ${COMP_KNOWN_HOSTS_WITH_AVAHI-} ]] &&
+        type avahi-browse &>/dev/null; then
+        # The original call to avahi-browse also had "-k", to avoid lookups
+        # into avahi's services DB. We don't need the name of the service, and
+        # if it contains ";", it may mistify the result. But on Gentoo (at
+        # least), -k wasn't available (even if mentioned in the manpage) some
+        # time ago, so...
+        COMPREPLY+=($(compgen -P "$prefix" -S "$suffix" -W \
+            "$(avahi-browse -cpr _workstation._tcp 2>/dev/null |
+                awk -F';' '/^=/ { print $7 }' | sort -u)" -- "$cur"))
+    fi
+
+    # Add hosts reported by ruptime.
+    if type ruptime &>/dev/null; then
+        COMPREPLY+=($(compgen -W \
+            "$(ruptime 2>/dev/null | awk '!/^ruptime:/ { print $1 }')" \
+            -- "$cur"))
+    fi
+
+    # Add results of normal hostname completion, unless
+    # `COMP_KNOWN_HOSTS_WITH_HOSTFILE' is set to an empty value.
+    if [[ -n ${COMP_KNOWN_HOSTS_WITH_HOSTFILE-1} ]]; then
+        COMPREPLY+=(
+            $(compgen -A hostname -P "$prefix" -S "$suffix" -- "$cur"))
+    fi
+
+    $reset
+
+    if [[ -v ipv4 ]]; then
+        COMPREPLY=("${COMPREPLY[@]/*:*$suffix/}")
+    fi
+    if [[ -v ipv6 ]]; then
+        COMPREPLY=("${COMPREPLY[@]/+([0-9]).+([0-9]).+([0-9]).+([0-9])$suffix/}")
+    fi
+    if [[ -v ipv4 || -v ipv6 ]]; then
+        for i in "${!COMPREPLY[@]}"; do
+            [[ ${COMPREPLY[i]} ]] || unset -v "COMPREPLY[i]"
+        done
+    fi
+
+    __ltrim_colon_completions "$prefix$cur"
+
+} # _known_hosts_real()
+complete -F _known_hosts traceroute traceroute6 \
+    fping fping6 telnet rsh rlogin ftp dig mtr ssh-installkeys showmount
+
+# This meta-cd function observes the CDPATH variable, so that cd additionally
+# completes on directories under those specified in CDPATH.
+#
+_cd()
+{
+    local cur prev words cword
+    _init_completion || return
+
+    local IFS=$'\n' i j k
+
+    compopt -o filenames
+
+    # Use standard dir completion if no CDPATH or parameter starts with /,
+    # ./ or ../
+    if [[ -z ${CDPATH:-} || $cur == ?(.)?(.)/* ]]; then
+        _filedir -d
+        return
+    fi
+
+    local -r mark_dirs=$(_rl_enabled mark-directories && echo y)
+    local -r mark_symdirs=$(_rl_enabled mark-symlinked-directories && echo y)
+
+    # we have a CDPATH, so loop on its contents
+    for i in ${CDPATH//:/$'\n'}; do
+        # create an array of matched subdirs
+        k="${#COMPREPLY[@]}"
+        for j in $(compgen -d -- $i/$cur); do
+            if [[ ($mark_symdirs && -L $j || $mark_dirs && ! -L $j) && ! -d ${j#$i/} ]]; then
+                j+="/"
+            fi
+            COMPREPLY[k++]=${j#$i/}
+        done
+    done
+
+    _filedir -d
+
+    if ((${#COMPREPLY[@]} == 1)); then
+        i=${COMPREPLY[0]}
+        if [[ $i == "$cur" && $i != "*/" ]]; then
+            COMPREPLY[0]="${i}/"
+        fi
+    fi
+
+    return
+}
+if shopt -q cdable_vars; then
+    complete -v -F _cd -o nospace cd pushd
+else
+    complete -F _cd -o nospace cd pushd
+fi
+
+# A _command_offset wrapper function for use when the offset is unknown.
+# Only intended to be used as a completion function directly associated
+# with a command, not to be invoked from within other completion functions.
+#
+_command()
+{
+    local offset i
+
+    # find actual offset, as position of the first non-option
+    offset=1
+    for ((i = 1; i <= COMP_CWORD; i++)); do
+        if [[ ${COMP_WORDS[i]} != -* ]]; then
+            offset=$i
+            break
+        fi
+    done
+    _command_offset $offset
+}
+
+# A meta-command completion function for commands like sudo(8), which need to
+# first complete on a command, then complete according to that command's own
+# completion definition.
+#
+_command_offset()
+{
+    # rewrite current completion context before invoking
+    # actual command completion
+
+    # find new first word position, then
+    # rewrite COMP_LINE and adjust COMP_POINT
+    local word_offset=$1 i j
+    for ((i = 0; i < word_offset; i++)); do
+        for ((j = 0; j <= ${#COMP_LINE}; j++)); do
+            [[ $COMP_LINE == "${COMP_WORDS[i]}"* ]] && break
+            COMP_LINE=${COMP_LINE:1}
+            ((COMP_POINT--))
+        done
+        COMP_LINE=${COMP_LINE#"${COMP_WORDS[i]}"}
+        ((COMP_POINT -= ${#COMP_WORDS[i]}))
+    done
+
+    # shift COMP_WORDS elements and adjust COMP_CWORD
+    for ((i = 0; i <= COMP_CWORD - word_offset; i++)); do
+        COMP_WORDS[i]=${COMP_WORDS[i + word_offset]}
+    done
+    for ((i; i <= COMP_CWORD; i++)); do
+        unset 'COMP_WORDS[i]'
+    done
+    ((COMP_CWORD -= word_offset))
+
+    COMPREPLY=()
+    local cur
+    _get_comp_words_by_ref cur
+
+    if ((COMP_CWORD == 0)); then
+        local IFS=$'\n'
+        compopt -o filenames
+        COMPREPLY=($(compgen -d -c -- "$cur"))
+    else
+        local cmd=${COMP_WORDS[0]} compcmd=${COMP_WORDS[0]}
+        local cspec=$(complete -p $cmd 2>/dev/null)
+
+        # If we have no completion for $cmd yet, see if we have for basename
+        if [[ ! $cspec && $cmd == */* ]]; then
+            cspec=$(complete -p ${cmd##*/} 2>/dev/null)
+            [[ $cspec ]] && compcmd=${cmd##*/}
+        fi
+        # If still nothing, just load it for the basename
+        if [[ ! $cspec ]]; then
+            compcmd=${cmd##*/}
+            _completion_loader $compcmd
+            cspec=$(complete -p $compcmd 2>/dev/null)
+        fi
+
+        if [[ -n $cspec ]]; then
+            if [[ ${cspec#* -F } != "$cspec" ]]; then
+                # complete -F <function>
+
+                # get function name
+                local func=${cspec#*-F }
+                func=${func%% *}
+
+                if ((${#COMP_WORDS[@]} >= 2)); then
+                    $func $cmd "${COMP_WORDS[-1]}" "${COMP_WORDS[-2]}"
+                else
+                    $func $cmd "${COMP_WORDS[-1]}"
+                fi
+
+                # restore initial compopts
+                local opt
+                while [[ $cspec == *" -o "* ]]; do
+                    # FIXME: should we take "+o opt" into account?
+                    cspec=${cspec#*-o }
+                    opt=${cspec%% *}
+                    compopt -o $opt
+                    cspec=${cspec#$opt}
+                done
+            else
+                cspec=${cspec#complete}
+                cspec=${cspec%%$compcmd}
+                COMPREPLY=($(eval compgen "$cspec" -- '$cur'))
+            fi
+        elif ((${#COMPREPLY[@]} == 0)); then
+            # XXX will probably never happen as long as completion loader loads
+            #     *something* for every command thrown at it ($cspec != empty)
+            _minimal
+        fi
+    fi
+}
+complete -F _command aoss command "do" else eval exec ltrace nice nohup padsp \
+    "then" time tsocks vsound xargs
+
+_root_command()
+{
+    local PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin
+    local root_command=$1
+    _command
+}
+complete -F _root_command fakeroot gksu gksudo kdesudo really
+
+# Return true if the completion should be treated as running as root
+_complete_as_root()
+{
+    [[ $EUID -eq 0 || ${root_command:-} ]]
+}
+
+_longopt()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    case "${prev,,}" in
+        --help | --usage | --version)
+            return
+            ;;
+        --!(no-*)dir*)
+            _filedir -d
+            return
+            ;;
+        --!(no-*)@(file|path)*)
+            _filedir
+            return
+            ;;
+        --+([-a-z0-9_]))
+            local argtype=$(LC_ALL=C $1 --help 2>&1 | command sed -ne \
+                "s|.*$prev\[\{0,1\}=[<[]\{0,1\}\([-A-Za-z0-9_]\{1,\}\).*|\1|p")
+            case ${argtype,,} in
+                *dir*)
+                    _filedir -d
+                    return
+                    ;;
+                *file* | *path*)
+                    _filedir
+                    return
+                    ;;
+            esac
+            ;;
+    esac
+
+    $split && return
+
+    if [[ $cur == -* ]]; then
+        COMPREPLY=($(compgen -W "$(LC_ALL=C $1 --help 2>&1 |
+            while read -r line; do
+                [[ $line =~ --[A-Za-z0-9]+([-_][A-Za-z0-9]+)*=? ]] &&
+                    printf '%s\n' ${BASH_REMATCH[0]}
+            done)" -- "$cur"))
+        [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
+    elif [[ $1 == *@(rmdir|chroot) ]]; then
+        _filedir -d
+    else
+        [[ $1 == *mkdir ]] && compopt -o nospace
+        _filedir
+    fi
+}
+# makeinfo and texi2dvi are defined elsewhere.
+complete -F _longopt a2ps awk base64 bash bc bison cat chroot colordiff cp \
+    csplit cut date df diff dir du enscript env expand fmt fold gperf \
+    grep grub head irb ld ldd less ln ls m4 md5sum mkdir mkfifo mknod \
+    mv netstat nl nm objcopy objdump od paste pr ptx readelf rm rmdir \
+    sed seq sha{,1,224,256,384,512}sum shar sort split strip sum tac tail tee \
+    texindex touch tr uname unexpand uniq units vdir wc who
+
+declare -Ag _xspecs
+
+_filedir_xspec()
+{
+    local cur prev words cword
+    _init_completion || return
+
+    _tilde "$cur" || return
+
+    local IFS=$'\n' xspec=${_xspecs[${1##*/}]} tmp
+    local -a toks
+
+    toks=($(
+        compgen -d -- "$(quote_readline "$cur")" | {
+            while read -r tmp; do
+                printf '%s\n' $tmp
+            done
+        }
+    ))
+
+    # Munge xspec to contain uppercase version too
+    # https://lists.gnu.org/archive/html/bug-bash/2010-09/msg00036.html
+    # news://news.gmane.io/4C940E1C.1010304@case.edu
+    eval xspec="${xspec}"
+    local matchop=!
+    if [[ $xspec == !* ]]; then
+        xspec=${xspec#!}
+        matchop=@
+    fi
+    xspec="$matchop($xspec|${xspec^^})"
+
+    toks+=($(
+        eval compgen -f -X "'!$xspec'" -- '$(quote_readline "$cur")' | {
+            while read -r tmp; do
+                [[ -n $tmp ]] && printf '%s\n' $tmp
+            done
+        }
+    ))
+
+    # Try without filter if it failed to produce anything and configured to
+    [[ -n ${COMP_FILEDIR_FALLBACK:-} && ${#toks[@]} -lt 1 ]] && {
+        local reset=$(shopt -po noglob)
+        set -o noglob
+        toks+=($(compgen -f -- "$(quote_readline "$cur")"))
+        IFS=' '
+        $reset
+        IFS=$'\n'
+    }
+
+    if ((${#toks[@]} != 0)); then
+        compopt -o filenames
+        COMPREPLY=("${toks[@]}")
+    fi
+}
+
+_install_xspec()
+{
+    local xspec=$1 cmd
+    shift
+    for cmd in "$@"; do
+        _xspecs[$cmd]=$xspec
+    done
+}
+# bzcmp, bzdiff, bz*grep, bzless, bzmore intentionally not here, see Debian: #455510
+_install_xspec '!*.?(t)bz?(2)' bunzip2 bzcat pbunzip2 pbzcat lbunzip2 lbzcat
+_install_xspec '!*.@(zip|[aegjswx]ar|exe|pk3|wsz|zargo|xpi|s[tx][cdiw]|sx[gm]|o[dt][tspgfc]|od[bm]|oxt|epub|apk|aab|ipa|do[ct][xm]|p[op]t[mx]|xl[st][xm]|pyz|whl)' unzip zipinfo
+_install_xspec '*.Z' compress znew
+# zcmp, zdiff, z*grep, zless, zmore intentionally not here, see Debian: #455510
+_install_xspec '!*.@(Z|[gGd]z|t[ag]z)' gunzip zcat
+_install_xspec '!*.@(Z|[gGdz]z|t[ag]z)' unpigz
+_install_xspec '!*.Z' uncompress
+# lzcmp, lzdiff intentionally not here, see Debian: #455510
+_install_xspec '!*.@(tlz|lzma)' lzcat lzegrep lzfgrep lzgrep lzless lzmore unlzma
+_install_xspec '!*.@(?(t)xz|tlz|lzma)' unxz xzcat
+_install_xspec '!*.lrz' lrunzip
+_install_xspec '!*.@(gif|jp?(e)g|miff|tif?(f)|pn[gm]|p[bgp]m|bmp|xpm|ico|xwd|tga|pcx)' ee
+_install_xspec '!*.@(gif|jp?(e)g|tif?(f)|png|p[bgp]m|bmp|x[bp]m|rle|rgb|pcx|fits|pm|svg)' qiv
+_install_xspec '!*.@(gif|jp?(e)g?(2)|j2[ck]|jp[2f]|tif?(f)|png|p[bgp]m|bmp|x[bp]m|rle|rgb|pcx|fits|pm|?(e)ps)' xv
+_install_xspec '!*.@(@(?(e)ps|?(E)PS|pdf|PDF)?(.gz|.GZ|.bz2|.BZ2|.Z))' gv ggv kghostview
+_install_xspec '!*.@(dvi|DVI)?(.@(gz|Z|bz2))' xdvi kdvi
+_install_xspec '!*.dvi' dvips dviselect dvitype dvipdf advi dvipdfm dvipdfmx
+_install_xspec '!*.[pf]df' acroread gpdf xpdf
+_install_xspec '!*.@(?(e)ps|pdf)' kpdf
+_install_xspec '!*.@(okular|@(?(e|x)ps|?(E|X)PS|[pf]df|[PF]DF|dvi|DVI|cb[rz]|CB[RZ]|djv?(u)|DJV?(U)|dvi|DVI|gif|jp?(e)g|miff|tif?(f)|pn[gm]|p[bgp]m|bmp|xpm|ico|xwd|tga|pcx|GIF|JP?(E)G|MIFF|TIF?(F)|PN[GM]|P[BGP]M|BMP|XPM|ICO|XWD|TGA|PCX|epub|EPUB|odt|ODT|fb?(2)|FB?(2)|mobi|MOBI|g3|G3|chm|CHM)?(.?(gz|GZ|bz2|BZ2|xz|XZ)))' okular
+_install_xspec '!*.pdf' epdfview pdfunite
+_install_xspec '!*.@(cb[rz7t]|djv?(u)|?(e)ps|pdf)' zathura
+_install_xspec '!*.@(?(e)ps|pdf)' ps2pdf ps2pdf12 ps2pdf13 ps2pdf14 ps2pdfwr
+_install_xspec '!*.texi*' makeinfo texi2html
+_install_xspec '!*.@(?(la)tex|texi|dtx|ins|ltx|dbj)' tex latex slitex jadetex pdfjadetex pdftex pdflatex texi2dvi xetex xelatex luatex lualatex
+_install_xspec '!*.mp3' mpg123 mpg321 madplay
+_install_xspec '!*@(.@(mp?(e)g|MP?(E)G|wm[av]|WM[AV]|avi|AVI|asf|vob|VOB|bin|dat|divx|DIVX|vcd|ps|pes|fli|flv|FLV|fxm|FXM|viv|rm|ram|yuv|mov|MOV|qt|QT|web[am]|WEB[AM]|mp[234]|MP[234]|m?(p)4[av]|M?(P)4[AV]|mkv|MKV|og[agmv]|OG[AGMV]|t[ps]|T[PS]|m2t?(s)|M2T?(S)|mts|MTS|wav|WAV|flac|FLAC|asx|ASX|mng|MNG|srt|m[eo]d|M[EO]D|s[3t]m|S[3T]M|it|IT|xm|XM)|+([0-9]).@(vdr|VDR))?(.@(crdownload|part))' xine aaxine fbxine
+_install_xspec '!*@(.@(mp?(e)g|MP?(E)G|wm[av]|WM[AV]|avi|AVI|asf|vob|VOB|bin|dat|divx|DIVX|vcd|ps|pes|fli|flv|FLV|fxm|FXM|viv|rm|ram|yuv|mov|MOV|qt|QT|web[am]|WEB[AM]|mp[234]|MP[234]|m?(p)4[av]|M?(P)4[AV]|mkv|MKV|og[agmv]|OG[AGMV]|t[ps]|T[PS]|m2t?(s)|M2T?(S)|mts|MTS|wav|WAV|flac|FLAC|asx|ASX|mng|MNG|srt|m[eo]d|M[EO]D|s[3t]m|S[3T]M|it|IT|xm|XM|iso|ISO)|+([0-9]).@(vdr|VDR))?(.@(crdownload|part))' kaffeine dragon totem
+_install_xspec '!*.@(avi|asf|wmv)' aviplay
+_install_xspec '!*.@(rm?(j)|ra?(m)|smi?(l))' realplay
+_install_xspec '!*.@(mpg|mpeg|avi|mov|qt)' xanim
+_install_xspec '!*.@(og[ag]|m3u|flac|spx)' ogg123
+_install_xspec '!*.@(mp3|ogg|pls|m3u)' gqmpeg freeamp
+_install_xspec '!*.fig' xfig
+_install_xspec '!*.@(mid?(i)|cmf)' playmidi
+_install_xspec '!*.@(mid?(i)|rmi|rcp|[gr]36|g18|mod|xm|it|x3m|s[3t]m|kar)' timidity
+_install_xspec '!*.@(669|abc|am[fs]|d[bs]m|dmf|far|it|mdl|m[eo]d|mid?(i)|mt[2m]|oct|okt?(a)|p[st]m|s[3t]m|ult|umx|wav|xm)' modplugplay modplug123
+_install_xspec '*.@([ao]|so|so.!(conf|*/*)|[rs]pm|gif|jp?(e)g|mp3|mp?(e)g|avi|asf|ogg|class)' vi vim gvim rvim view rview rgvim rgview gview emacs xemacs sxemacs kate kwrite
+_install_xspec '!*.@(zip|z|gz|tgz)' bzme
+# konqueror not here on purpose, it's more than a web/html browser
+_install_xspec '!*.@(?([xX]|[sS])[hH][tT][mM]?([lL]))' netscape mozilla lynx galeon dillo elinks amaya epiphany
+_install_xspec '!*.@(sxw|stw|sxg|sgl|doc?([mx])|dot?([mx])|rtf|txt|htm|html|?(f)odt|ott|odm|pdf)' oowriter lowriter
+_install_xspec '!*.@(sxi|sti|pps?(x)|ppt?([mx])|pot?([mx])|?(f)odp|otp)' ooimpress loimpress
+_install_xspec '!*.@(sxc|stc|xls?([bmx])|xlw|xlt?([mx])|[ct]sv|?(f)ods|ots)' oocalc localc
+_install_xspec '!*.@(sxd|std|sda|sdd|?(f)odg|otg)' oodraw lodraw
+_install_xspec '!*.@(sxm|smf|mml|odf)' oomath lomath
+_install_xspec '!*.odb' oobase lobase
+_install_xspec '!*.[rs]pm' rpm2cpio
+_install_xspec '!*.aux' bibtex
+_install_xspec '!*.po' poedit gtranslator kbabel lokalize
+_install_xspec '!*.@([Pp][Rr][Gg]|[Cc][Ll][Pp])' harbour gharbour hbpp
+_install_xspec '!*.[Hh][Rr][Bb]' hbrun
+_install_xspec '!*.ly' lilypond ly2dvi
+_install_xspec '!*.@(dif?(f)|?(d)patch)?(.@([gx]z|bz2|lzma))' cdiff
+_install_xspec '!@(*.@(ks|jks|jceks|p12|pfx|bks|ubr|gkr|cer|crt|cert|p7b|pkipath|pem|p10|csr|crl)|cacerts)' portecle
+_install_xspec '!*.@(mp[234c]|og[ag]|@(fl|a)ac|m4[abp]|spx|tta|w?(a)v|wma|aif?(f)|asf|ape)' kid3 kid3-qt
+unset -f _install_xspec
+
+# Minimal completion to use as fallback in _completion_loader.
+_minimal()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+    $split && return
+    _filedir
+}
+# Complete the empty string to allow completion of '>', '>>', and '<' on < 4.3
+# https://lists.gnu.org/archive/html/bug-bash/2012-01/msg00045.html
+complete -F _minimal ''
+
+__load_completion()
+{
+    local -a dirs=(${BASH_COMPLETION_USER_DIR:-${XDG_DATA_HOME:-$HOME/.local/share}/bash-completion}/completions)
+    local ifs=$IFS IFS=: dir cmd="${1##*/}" compfile
+    [[ -n $cmd ]] || return 1
+    for dir in ${XDG_DATA_DIRS:-/usr/local/share:/usr/share}; do
+        dirs+=($dir/bash-completion/completions)
+    done
+    IFS=$ifs
+
+    if [[ $BASH_SOURCE == */* ]]; then
+        dirs+=("${BASH_SOURCE%/*}/completions")
+    else
+        dirs+=(./completions)
+    fi
+
+    local backslash=
+    if [[ $cmd == \\* ]]; then
+        cmd="${cmd:1}"
+        # If we already have a completion for the "real" command, use it
+        $(complete -p "$cmd" 2>/dev/null || echo false) "\\$cmd" && return 0
+        backslash=\\
+    fi
+
+    for dir in "${dirs[@]}"; do
+        [[ -d $dir ]] || continue
+        for compfile in "$cmd" "$cmd.bash" "_$cmd"; do
+            compfile="$dir/$compfile"
+            # Avoid trying to source dirs; https://bugzilla.redhat.com/903540
+            if [[ -f $compfile ]] && . "$compfile" &>/dev/null; then
+                [[ $backslash ]] && $(complete -p "$cmd") "\\$cmd"
+                return 0
+            fi
+        done
+    done
+
+    # Look up simple "xspec" completions
+    [[ -v _xspecs[$cmd] ]] &&
+        complete -F _filedir_xspec "$cmd" "$backslash$cmd" && return 0
+
+    return 1
+}
+
+# set up dynamic completion loading
+_completion_loader()
+{
+    # $1=_EmptycmD_ already for empty cmds in bash 4.3, set to it for earlier
+    local cmd="${1:-_EmptycmD_}"
+
+    __load_completion "$cmd" && return 124
+
+    # Need to define *something*, otherwise there will be no completion at all.
+    complete -F _minimal -- "$cmd" && return 124
+} &&
+    complete -D -F _completion_loader
+
+# Function for loading and calling functions from dynamically loaded
+# completion files that may not have been sourced yet.
+# @param $1 completion file to load function from in case it is missing
+# @param $2... function and its arguments
+_xfunc()
+{
+    set -- "$@"
+    local srcfile=$1
+    shift
+    declare -F $1 &>/dev/null || __load_completion "$srcfile"
+    "$@"
+}
+
+# source compat completion directory definitions
+compat_dir=${BASH_COMPLETION_COMPAT_DIR:-/etc/bash_completion.d}
+if [[ -d $compat_dir && -r $compat_dir && -x $compat_dir ]]; then
+    for i in "$compat_dir"/*; do
+        [[ ${i##*/} != @($_backup_glob|Makefile*|$_blacklist_glob) && -f \
+        $i && -r $i ]] && . "$i"
+    done
+fi
+unset compat_dir i _blacklist_glob
+
+# source user completion file
+user_completion=${BASH_COMPLETION_USER_FILE:-~/.bash_completion}
+[[ ${BASH_SOURCE[0]} != "$user_completion" && -r $user_completion && -f $user_completion ]] &&
+    . $user_completion
+unset user_completion
+
+unset -f have
+unset have
+
+set $BASH_COMPLETION_ORIGINAL_V_VALUE
+unset BASH_COMPLETION_ORIGINAL_V_VALUE
+
+# ex: filetype=sh
diff --git a/bash_completion.sh.in b/bash_completion.sh.in
new file mode 100644
index 0000000..b2a527e
--- /dev/null
+++ b/bash_completion.sh.in
@@ -0,0 +1,16 @@
+# shellcheck shell=sh disable=SC1091,SC2039,SC2166
+# Check for interactive bash and that we haven't already been sourced.
+if [ "x${BASH_VERSION-}" != x -a "x${PS1-}" != x -a "x${BASH_COMPLETION_VERSINFO-}" = x ]; then
+
+    # Check for recent enough version of bash.
+    if [ "${BASH_VERSINFO[0]}" -gt 4 ] ||
+        [ "${BASH_VERSINFO[0]}" -eq 4 -a "${BASH_VERSINFO[1]}" -ge 2 ]; then
+        [ -r "${XDG_CONFIG_HOME:-$HOME/.config}/bash_completion" ] &&
+            . "${XDG_CONFIG_HOME:-$HOME/.config}/bash_completion"
+        if shopt -q progcomp && [ -r @datadir@/@PACKAGE@/bash_completion ]; then
+            # Source completion code.
+            . @datadir@/@PACKAGE@/bash_completion
+        fi
+    fi
+
+fi