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#!/bin/bash
default_percent='50'
keep_env=(XAUTHORITY DISPLAY)
set -e
usage()
{
cat <<EOF
Usage: $0 [percentage]% [--] command [arguments...]
The [percentage] argument must end with a literal '%'.
E.g.:
slice 50% firefox
The command cannot start with a literal '-'.
EOF
}
percent=$1
case "$1" in
--) percent=$default_percent ;;
'' | -*) usage >&2; exit 1;;
*.*%) percent=${1%.*} ;;
*%) percent=${1%\%} ;;
esac
[ "$percent" -ge 0 ]
[ "$percent" -le 100 ]
shift
case "$1" in
--) shift ;;
esac
unit_name=$1
keep_env_opts=()
for v in "${keep_env[@]}"
do
keep_env_opts+=(-E "${!v}")
done
systemd-run -u "$unit_name" \
"${keep_env_opts[@]}"
"$0" "$@"
"$@"
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