shell指令碼除錯工具的安裝和使用

目前在檢視android原始碼時候發現有很多shell指令碼,由於方便我自己去除錯指令碼,就去查詢了下指令碼除錯工具bashdb,如果大家之前使用過gdb的除錯工具可以很容易的掌握，下面是我對常用命令的使用心得分享,更詳細的內容可以檢視文章末尾提供的鏈結,有官網的參考文件可以給大家學習。

這裡我的環境是mac的安裝步驟，其他平台安裝請自行google。

bashdb<0> show alias
cont: continue    |  fin: finish   |  list>: list  |  h: help
q!: quit          |  !: history    |  x: examine   |  ev: eval
bash: shell       |  exit: quit    |  ed: edit     |  eval?: eval
?: help           |  w: watch      |  s: step      |  d: clear
where: backtrace  |  t: backtrace  |  sh: shell    |  c: continue
s-: step-         |  r: run        |  q: quit      |  b: break
s+: step+         |  pr: print     |  n: next      |  a: action
bt: backtrace     |  restart: run  |  l: list
l>: list          |  ev?: eval     |  i: info

#!/bin/bash
function print
function getdate
echo
"hello $user,"
echo
"today is $(getdate)
"

bashdb 《除錯檔案》

martindemacbook-pro:android_shell martin$ bashdb debug.sh
bash debugger, bashdb, release 4.4-0.94
this is free software, covered by the gnu general public license, and you are
welcome to change it and/or distribute copies of it under certain conditions.
(/users/martin/workspace/linux/android_shell/debug.sh:13):
13:	echo "hello $user,"
bashdb<0>

bashdb<0> l 行號

bashdb<1> l 1
1:    #!/bin/bash
2:    function print
3:    
9:    function getdate
10:    
9:    function getdate
10:    {
bashdb<3> b 6 if$test==alabama
breakpoint 1 set in file /users/martin/workspace/linux/android_shell/debug.sh, line 6.

bashdb<4> d 2

bashdb<8> i b num type disp enb what 2 breakpoint keep y /users/martin/workspace/linux/android_shell/debug.sh:2 3 breakpoint keep y /users/martin/workspace/linux/android_shell/debug.sh:10 bashdb<9> d 10 removed 1 breakpoint(s). bashdb<10> i b num type disp enb what

2 breakpoint keep y /users/martin/workspace/linux/android_shell/debug.sh:2

bashdb<1> run

bashdb<9> run
restarting with: /usr/local/bin/bashdb debug.sh
bash debugger, bashdb, release 4.4-0.94
this is free software, covered by the gnu general public license, and you are
welcome to change it and/or distribute copies of it under certain conditions.
(/users/martin/workspace/linux/android_shell/debug.sh:13):
13:	echo "hello $user,"

bashdb<0> c

bashdb<0> c hello martin, today is date +%y-%m-%d

debugged program terminated normally. use q to quit or r to restart.

bashdb<1> q

bashdb<1> q
bashdb: that's all, folks...

step over:如果正在呼叫乙個子函式，不會跟到函式內部

bashdb<0> n

bashdb<0> n
hello martin,
(/users/martin/workspace/linux/android_shell/debug.sh:14):
14:	echo "today is $(getdate)"

step into：如果正在呼叫乙個子函式，不會跟到函式內部

bashdb<0> s

bashdb<1> s
(/users/martin/workspace/linux/android_shell/debug.sh:14):
14:	echo "today is $(getdate)"
getdate

step return:如果正在呼叫乙個子函式，並且進入函式內部，會退出到喊出。

bashdb<(2)> finish

bashdb<(2)> finish
today is date +%y-%m-%d
debugged program terminated normally. use q to quit or r to restart.

用於列印當前變數的值

bashdb<6> pr 《列印的變數》

hello martin,
(/users/martin/workspace/linux/android_shell/debug.sh:14):
14:	echo "today is $(getdate)"
bashdb<6> pr $user
martin

監控當前變數的值,當有值發生改變的時候,就改變值。

bashdb<1> watch 《變數名稱不帶$號》

bashdb<1> watch user
0: ($user)==martin arith: 0
bashdb<2> n

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