#!/bin/bash
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# Copyright (c) 2009, Scott Barr <gsbarr@gmail.com>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the <organization> nor the
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# names of its contributors may be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
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# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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function countdown
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{
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local OLD_IFS="${IFS}"
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IFS=":"
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local ARR=( $1 ) ; shift
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IFS="${OLD_IFS}"
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local PREFIX="$*" ; [ -n "${PREFIX}" ] && PREFIX="${PREFIX}"
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local SECONDS=$(( (ARR[0] * 60 * 60) + (ARR[1] * 60) + ARR[2] ))
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local START=$(date +%s)
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local END=$((START + SECONDS))
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local CUR=$START
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while [[ $CUR -lt $END ]]
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do
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CUR=$(date +%s)
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LEFT=$((END-CUR))
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printf "\r${PREFIX} %02d" \
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$((LEFT%60))
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sleep 1
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done
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echo " "
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}
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function outputVar()
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{
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y=\$"$1"
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x=`eval "expr \"$y\" "`
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eval "$1=\"$2\""
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}
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function valid_input()
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{
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local correct="no"
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Return_Val=""
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if [ -z "$2" ]
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then
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local opts=( yes no )
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local opt_list="yes/no"
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else
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local opts=( `echo $2 | tr "/" " "` )
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local opt_list=$2
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fi
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while [ "$correct" != "yes" ]
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do
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if [ -n "$3" ]
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then
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line_prompt="$1 [default: $3] "
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else
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line_prompt="$1 [$opt_list] "
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fi
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echo -en "$line_prompt"
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read answer
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if [ -n "$3" ]
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then
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answer=$3
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else
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ret=`echo "${opts[@]}" | grep -w "$answer"`
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fi
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if [ $? -eq 0 ]
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then
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correct="yes"
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Return_Val=$answer
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fi
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done
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}
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function start_spinner()
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{
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parent_pid=$$
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(SP_STRING="/-\\|"; while [ -d /proc/$1 ] && [ -d /proc/$parent_pid ]; do printf "\e[1;37m\e7[ %1.1s ] \e8\e[0m" "$SP_STRING"; sleep .2; SP_STRING=${SP_STRING#"${SP_STRING%?}"}${SP_STRING%?}; done) &
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disown
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spinner_pid=$!
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}
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function stop_spinner()
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{
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if [ $spinner_pid -gt 0 ]
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then
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kill -HUP $spinner_pid 2>/dev/null
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fi
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}
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function exec_command()
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{
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printf "%-40s" "$2"
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(eval $1 >/dev/null 2>&1) &
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pid=$!
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start_spinner
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wait $pid
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status=$?
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stop_spinner
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if [ $status -eq 0 ];
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then
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echo -e "\e[1;37m[ \e[0m\e[1;32mok\e[0m\e[1;37m ]\e[0m"
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else
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echo -e "\e[1;37m[ \e[0m\e[1;31mfailed\e[0m\e[1;37m ]\e[0m"
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echo -e "The following command did not complete successfully:"
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echo -e "$1"
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exit 1
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fi
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}
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