調試 shell script 方法

標籤：style   blog   color   for   ar   div   代碼   log   

[email protected]:~$ cat b.sh
#!/bin/bashdir=`pwd`dir=$dir‘/‘for f in `ls *.png`do  echo $dir$fdone

看每一行代碼的執行：

[email protected]:~$ bash -x b.sh++ pwd+ dir=/home/wade+ dir=/home/wade/++ ls chrome_1407299385726.png chrome_1427299385726.png+ for f in ‘`ls *.png`‘+ echo /home/wade/chrome_1407299385726.png/home/wade/chrome_1407299385726.png+ for f in ‘`ls *.png`‘+ echo /home/wade/chrome_1427299385726.png

進一步，看具體執行的代碼與行號對應：

[email protected]:~$ export PS4=‘+${BASH_SOURCE}:${LINENO}:${FUNCNAME[0]}: ‘[email protected]:~$ bash -x b.sh++b.sh:2:: pwd+b.sh:2:: dir=/home/wade+b.sh:3:: dir=/home/wade/++b.sh:8:: ls chrome_1407299385726.png chrome_1427299385726.png+b.sh:4:: for f in ‘`ls *.png`‘+b.sh:7:: echo /home/wade/chrome_1407299385726.png/home/wade/chrome_1407299385726.png+b.sh:4:: for f in ‘`ls *.png`‘+b.sh:7:: echo /home/wade/chrome_1427299385726.png

指定指令碼的部分去跑詳細的行號，其餘的忽略：

[email protected]:~$ cat b.sh #!/bin/bashdir=`pwd`dir=$dir‘/‘#this line above won‘t log out set -xfor f in `ls *.png`do  echo $dir$fdoneset +x#the follow line won‘t log out echo ‘end‘abc=‘new var‘

運行輸出：

[email protected]:~$ ./b.sh++./b.sh:10:: ls chrome_1407299385726.png chrome_1427299385726.png+./b.sh:6:: for f in ‘`ls *.png`‘+./b.sh:9:: echo /home/wade/chrome_1407299385726.png/home/wade/chrome_1407299385726.png+./b.sh:6:: for f in ‘`ls *.png`‘+./b.sh:9:: echo /home/wade/chrome_1427299385726.png/home/wade/chrome_1427299385726.png+./b.sh:11:: set +xend