do you want to debug bash shell using tool ? ( by quqi99 )
作者：张华 发表于：2012-05-07
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( http://blog.csdn.net/quqi99 )
do you want to debug bash shell using tool ? if so, you can use bashdb, bashdb is a command tool, if you familiar with emacs or ddd, you can also conbine them as your GUI tool.
bellow is the steps:
1) yum install bashdb
2) one example
vi /bak/tmp/test.sh
#!/bin/bash
version="0.01";
fibonacci() {
n=${1:?If you want the nth fibonacci number, you must supply n as the first parameter.}
if [ $n -le 1 ]; then
echo $n
else
l=`fibonacci $((n-1))`
r=`fibonacci $((n-2))`
echo $((l + r))
fi
}
for i in `seq 1 10`
do
result=$(fibonacci $i)
echo "i=$i result=$result"
done
3) begin to debug
[root@hua devstack-gate]# bash --debugger /bak/tmp/test.sh
bash debugger, bashdb, release 4.2-0.7
Copyright 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Rocky Bernstein
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.
(/bak/tmp/test.sh:3):
3: version="0.01";
bashdb<0> next
(/bak/tmp/test.sh:16):
16: for i in `seq 1 10`
bashdb<1> list
11: r=`fibonacci $((n-2))`
12: echo $((l + r))
13: fi
14: }
15:
16: => for i in `seq 1 10`
17: do
18: result=$(fibonacci $i)
19: echo "i=$i result=$result"
20: done
bashdb<2> print $1
bashdb<3> next
(/bak/tmp/test.sh:18):
18: result=$(fibonacci $i)
bashdb<4> print $1
bashdb<5> print $i
1
bashdb<6> exit
[root@hua devstack-gate]# clear
[root@hua devstack-gate]# bash --debugger /bak/tmp/test.sh
bash debugger, bashdb, release 4.2-0.7
Copyright 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Rocky Bernstein
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.
(/bak/tmp/test.sh:3):
3: version="0.01";
bashdb<0> next
(/bak/tmp/test.sh:16):
16: for i in `seq 1 10`
bashdb<1> list
11: r=`fibonacci $((n-2))`
12: echo $((l + r))
13: fi
14: }
15:
16: => for i in `seq 1 10`
17: do
18: result=$(fibonacci $i)
19: echo "i=$i result=$result"
20: done
bashdb<2> print $i
bashdb<3> next
(/bak/tmp/test.sh:18):
18: result=$(fibonacci $i)
bashdb<4> print $i
1
bashdb<5> next
(/bak/tmp/test.sh:19):
19: echo "i=$i result=$result"
bashdb<6> print $result
bashdb<7> next
i=1 result=1
(/bak/tmp/test.sh:16):
16: for i in `seq 1 10`
bashdb<8> next
(/bak/tmp/test.sh:18):
18: result=$(fibonacci $i)
bashdb<9> print $result
bashdb<10> print $i
2
bashdb<11> break
Breakpoint 1 set in file /bak/tmp/test.sh, line 18.
bashdb<12> continue
i=2 result=1
Breakpoint 1 hit (1 times).
(/bak/tmp/test.sh:18):
18: result=$(fibonacci $i)
bashdb<13> continue
i=3 result=2
Breakpoint 1 hit (2 times).
(/bak/tmp/test.sh:18):
18: result=$(fibonacci $i)
bashdb<14> continue
i=4 result=3
Breakpoint 1 hit (3 times).
(/bak/tmp/test.sh:18):
18: result=$(fibonacci $i)
bashdb<16> quit