从ini文件的某些部分读取某些密钥(sed/awk?) [英] Read certain key from certain section of ini file (sed/awk ?)

问题描述

我需要从具有典型结构的ini文件中检索键的值:

I need to retrieve the value of a key from an ini file with typical structure:

[abcd]
key1=a
key2=b
[efgh]
key1=c
key2=d
[hijk]
key1=e
key2=f

，键名在不同的部分重复，并且各部分没有一致的命名/顺序.如何从efgh中找到key1?如果我grep，那么我会找到所有key1(并且我不知道各节的顺序).

with key names repeated in different sections, and no consistant naming/order of sections. How could I find key1 from efgh? If I grep then I'll find all key1's (and I don't know the order of the sections).

我怀疑sed或awk可以做到这一点，但我找不到它...

I suspect sed or awk can do this but I can't find it...

推荐答案

这可能是一个开始:

awk -F'=' -v section="[efgh]" -v k="key1"  '
$0==section{ f=1; next }  # Enable a flag when the line is like your section
/\[/{ f=0; next }         # For any lines with [ disable the flag
f && $1==k{ print $0 }    # If flag is set and first field is the key print key=value
' ini.file

您传递两个变量section和k. section需要包含要查看的部分. k应该包含您要为其获取值的key.

You pass two variables, section and k. section needs to contain the section you want to look under. k should contain the key you are trying to obtain value for.

在[efgh]部分下找到key1的值:

Find value of key1 under section [efgh]:

$ awk -F'=' -v section="[efgh]" -v k="key1"  '
$0==section{ f=1; next }  
/\[/{ f=0; next }         
f && $1==k{ print $0 }      
' ini.file
key1=c

在[hijk]部分下找到key2的值:

Find value of key2 under section [hijk]:

$ awk -F'=' -v section="[hijk]" -v k="key2"  '
$0==section{ f=1; next }  
/\[/{ f=0; next }         
f && $1==k{ print $0 }      
' ini.file
key2=f

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