参数:
-n 不执行脚本,仅检查语法是否错误
-v 将脚本内容输出到屏幕上,然后执行脚本
-x 执行脚本,并将内容输出到屏幕
-n
[[email protected] sbin]# sh -n debug.sh [[email protected] sbin]#
-v
[[email protected] sbin]# sh -v debug.sh 10 module () { eval `/usr/bin/modulecmd bash $*` } #/bin/bash if [ $1 -gt 5 ];then echo "yes" else echo "no" fi yes
-x
[[email protected] sbin]# sh -x debug.sh + ‘[‘ -gt 5 ‘]‘ debug.sh: line 2: [: -gt: unary operator expected + echo no no
拓展:
利用PS4,使调试时输出行号
[[email protected] sbin]# echo $PS4 + [[email protected] sbin]# export PS4=‘+{$LINENO}‘[[email protected] sbin]# sh -x debug.sh 4+{2}‘[‘ 4 -gt 5 ‘]‘+{5}echo nono
利用set ,缩小调试作用域
set -x 开启调试功能
set +x 关闭调试功能
[[email protected] sbin]# cat demo.sh #/bin/bash . /etc/init.d/functions set -x read -p "Pleas input your anwser[yes/no]: " an set +x if [[ $an = yes ]] then action "The answer is true" /bin/true else action "Then answer is false" /bin/false fi [[email protected] sbin]# sh demo.sh +{4}read -p ‘Pleas input your anwser[yes/no]: ‘ an Pleas input your anwser[yes/no]: yes +{5}set +x The answer is true [ OK ]
时间: 2024-07-31 19:43:21