我按照本手册倾向于使用bashdb: http://archive09.linux.com/articles/153383.html#commentthis 当我使用bashdb来编写脚本时:
#!/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
以下是调试的详细信息: kaiwii @ ubuntu:〜/ shell_test $ bash --debugger ./fibonacci.sh bashdb调试器,发布4.2-0.6
Copyright 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010 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.
(/home/kaiwii/shell_test/fibonacci.sh:3):
3: version="0.01";
bashdb<0> bt
->0 in file `./fibonacci.sh' at line 3
##1 main() called from file `./fibonacci.sh' at line 0
bashdb<1> next
(/home/kaiwii/shell_test/fibonacci.sh:16):
16: for i in `seq 1 10`
bashdb<2> 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=$result"
20: done
bashdb<3> next
(/home/kaiwii/shell_test/fibonacci.sh:18):
18: result=$(fibonacci $i)
bashdb<4> break fibonacci
Breakpoint 1 set in file /home/kaiwii/shell_test/fibonacci.sh, line 5.
bashdb<5> continue
i=1 result=1
i=2 result=1
i=3 result=2
i=4 result=3
i=5 result=5
i=6 result=8
i=7 result=13
i=8 result=21
i=9 result=34
i=10 result=55
我的问题是当我使用命令时,在使用命令后继续,打破斐波那契 ,它确实停在方法的开头,斐波那契,而是退出脚本。
答案 0 :(得分:3)
这是处理“break”命令时bashdb(版本4.2-0.8及更低版本)中的错误。
“next”命令设置一个标志,告诉bash跳过函数,“break”命令不清除它。
git sources有修复,所以如果你可以使用它,这是获得修复的一种方法。
另一种方法是找到安装bashdb/lib/break.sh
的位置(假设它位于/usr/share/lib/bashdb/lib/break.sh
中)并将下面的补丁保存在/tmp/bashdb.patch
--- bashdb/lib/break.sh
+++ bashdb/lib/break.sh
@@ -218,6 +218,11 @@ _Dbg_set_brkpt() {
typeset dq_source_file
dq_source_file=$(_Dbg_esc_dq "$source_file")
typeset dq_condition=$(_Dbg_esc_dq "$condition")
+
+ # Make sure we are not skipping over functions.
+ _Dbg_old_set_opts="$_Dbg_old_set_opts -o functrace"
+ _Dbg_write_journal_eval "_Dbg_old_set_opts='$_Dbg_old_set_opts'"
+
_Dbg_write_journal_eval "_Dbg_brkpt_line[$_Dbg_brkpt_max]=$lineno"
_Dbg_write_journal_eval "_Dbg_brkpt_file[$_Dbg_brkpt_max]=\"$dq_source_file\""
_Dbg_write_journal "_Dbg_brkpt_cond[$_Dbg_brkpt_max]=\"$dq_condition\""
然后以root身份运行:
# cd /usr/share/lib
# patch -p0 < /tmp/bashdb.patch