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bar2.sh
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#!/usr/bin/env bash
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#############################################################################
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###########################################################################
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###
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### Modified/Rewritten by A.M.Danischewski (c) 2015 v1.1
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### Issues: If you find any issues emai1 me at my <first name> dot
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### <my last name> at gmail dot com.
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###
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### Based on scripts posted by Pez Cuckow, William Pursell at:
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### http://stackoverflow.com/questions/12498304/using-bash-to-display-\
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### a-progress-working-indicator
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###
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### This program runs a program passed in and outputs a timing of the
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### command and it exec's a new fd for stdout so you can assign a
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### variable the output of what was being run.
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###
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### This is a very new rough draft but could be expanded.
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###
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### This program is free software: you can redistribute it and/or modify
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### it under the terms of the GNU General Public License as published by
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### the Free Software Foundation, either version 3 of the License, or
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### (at your option) any later version.
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###
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### This program is distributed in the hope that it will be useful,
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### but WITHOUT ANY WARRANTY; without even the implied warranty of
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### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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### GNU General Public License for more details.
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###
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### You should have received a copy of the GNU General Public License
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### along with this program. If not, see <http://www.gnu.org/licenses/>.
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###########################################################################
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#############################################################################
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declare CMD="${1}"
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shift ## Clip the first value of the $@, the rest are the options.
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declare CMD_OPTIONS="$@"
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declare CMD_OUTPUT=""
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declare TMP_OUTPUT="/tmp/_${0##*/}_$$_$(date +%Y%m%d%H%M%S%N)"
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declare -r SPIN_DELAY="0.1"
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declare -i PID=
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function usage() {
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cat <<EOF
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Description: ${0##*/}
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This program runs a program passed in and outputs a timing of the
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command and it exec's a new fd for stdout so you can assign a variable
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the output of what was being run.
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Usage: ${0##*/} <command> [command options]
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E.g.
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>$ ${0##*/} sleep 5 \&\& echo "hello" \| figlet
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Running: sleep 5 && echo hello | figlet, PID 2587:/
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real 0m5.003s
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user 0m0.000s
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sys 0m0.002s
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_ _ _
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| |__ ___| | | ___
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| '_ \ / _ \ | |/ _ \
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| | | | __/ | | (_) |
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|_| |_|\___|_|_|\___/
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Done..
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>$ var=\$(${0##*/} sleep 5 \&\& echo hi)
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Running: sleep 5 && echo hi, PID 32229:-
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real 0m5.003s
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user 0m0.000s
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sys 0m0.001s
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Done..
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>$ echo \$var
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hi
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EOF
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}
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function spin_wait() {
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local -a spin
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spin[0]="-"
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spin[1]="\\"
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spin[2]="|"
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spin[3]="/"
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echo -en "Running: ${CMD} ${CMD_OPTIONS}, PID ${PID}: " >&3
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while kill -0 ${PID} 2>/dev/random; do
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for i in "${spin[@]}"; do
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echo -ne "\b$i" >&3
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sleep ${SPIN_DELAY}
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done
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done
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}
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function run_cmd() {
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exec 3>$(tty)
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eval "time ${CMD} ${CMD_OPTIONS}" 2>>"${TMP_OUTPUT}" | tee "${TMP_OUTPUT}" &
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PID=$! # Set global PID to process id of the command we just ran.
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spin_wait
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echo -en "\n$(< "${TMP_OUTPUT}")\n" >&3
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echo -en "Done..\n" >&3
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rm "${TMP_OUTPUT}"
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exec 3>&-
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}
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if [[ -z "${CMD}" || "${CMD}" =~ ^-. ]]; then
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usage | more && exit 0
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else
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run_cmd
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fi
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exit 0
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