linux – 在安装脚本的持续时间内暂时增加sudo的超时

例如(删除’echo’语句来使用它;这些只显示它“工作”)：

#!/bin/bash
log=running_setup.txt
sudo_stat=sudo_status.txt

echo "========= running script $$========"
echo $$>> $sudo_stat
trap 'rm -f $sudo_stat >/dev/null 2>&1' 0
trap "exit 2" 1 2 3 15

sudo_me() {
 while [ -f $sudo_stat ]; do
  echo "checking $$...$(datE)"
  sudo -v
  sleep 5
 done &
}


echo "=setTing up sudo heartbeat="
sudo -v
sudo_me

echo "=running setup=" | tee $log
while [ -f $log ]
do
 echo "running setup $$...$(datE) ===" | tee -a $log
 sleep 2
done

# finish sudo loop
rm $sudo_stat

然后你会看到…(注意：pid被放入tmp文件,只是为了你可以很容易地杀死它.但是没有必要)：

$./do_it.sh
========= running script 6776 ========
=setTing up sudo heartbeat=
[sudo] password for user: 
=running setup=
checking 6776 ...Wed May  4 16:31:47 PDT 2011
running setup 6776 ...Wed May  4 16:31:48 PDT 2011 ===
running setup 6776 ...Wed May  4 16:31:50 PDT 2011 ===
running setup 6776 ...Wed May  4 16:31:52 PDT 2011 ===
checking 6776 ...Wed May  4 16:31:53 PDT 2011
running setup 6776 ...Wed May  4 16:31:54 PDT 2011 ===
<ctrl-c>  (cleans up files,then exits)