/usr/share/bash-completion/completions/delpart is in util-linux 2.29.2-1+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | _delpart_module()
{
local cur prev OPTS
COMPREPLY=()
cur="${COMP_WORDS[COMP_CWORD]}"
prev="${COMP_WORDS[COMP_CWORD-1]}"
case $prev in
'-h'|'--help'|'-V'|'--version')
return 0
;;
esac
case $COMP_CWORD in
1)
OPTS="--help --version $(lsblk -pnro name)"
COMPREPLY=( $(compgen -W "${OPTS[*]}" -- $cur) )
;;
2)
prev="${COMP_WORDS[COMP_CWORD-1]}"
COMPREPLY=( $(compgen -W "$(cat /sys/block/${prev##*/}/*/partition 2>/dev/null)" -- $cur) )
;;
esac
return 0
}
complete -F _delpart_module delpart
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