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bash - 从文件中提取两个模式之间的内容

问题描述

我想在The SUMMARYandEnd processing summary for first university以及The SUMMARYand之间提取以下内容End processing summary for second university

这是我的文件：

Logs here
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More logs here
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The SUMMARY
Total students: 1200
Total teachers: 10
Total subjects: 20
Total attendance: 12000
End processing summary for first university

Logs here
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More logs here
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The SUMMARY
Total students: 1500
Total teachers: 12
Total subjects: 15
Total attendance: 20000
End processing summary for second university

Logs here
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More logs here
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以下效果很好：

firstUniversity=$(awk '/The SUMMARY/ && ++n == 1, /End processing summary for first university/' < theLog.log)

secondUniversity=$(awk '/The SUMMARY/ && ++n == 2, /End processing summary for second university/' < theLog.log)

但是，有时 要么 要么the summary for first university丢失the summary for second university，上面的代码不起作用。

第一个大学街区不见了

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Logs here
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The SUMMARY
Total students: 1500
Total teachers: 12
Total subjects: 15
Total attendance: 20000
End processing summary for second university

Logs here
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More logs here
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或者第二个大学街区不见了

Logs here
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The SUMMARY
Total students: 1200
Total teachers: 10
Total subjects: 20
Total attendance: 12000
End processing summary for first university

Logs here
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More logs here

任何使用sed或awk命令的解决方案？

标签： bashawkpattern-matchingextract

解决方案

您能否尝试使用显示的示例进行以下、编写和测试。在这个解决方案中，为了清楚起见，我创建了found_university变量。

awk '
/The SUMMARY/{
   found_summary=1
   val=found_university=""
}
/End processing summary for first university|End processing summary for second university/{
   found_university=1
   if(found_university && found_summary){
     print val ORS $0
   }
   val=found_university=found_summary=""
}
found_summary{
   val=(val?val ORS:"")$0
}
'  Input_file

可以尝试遵循不使用变量found_university并简单地检查大学字符串出现的条件。

awk '
/The SUMMARY/{
   found_summary=1
   val=""
}
/End processing summary for first university|End processing summary for second university/{
   if(found_summary){
     print val ORS $0
   }
   val=found_summary=""
}
found_summary{
   val=(val?val ORS:"")$0
}
'   Input_file

说明：为上述代码添加详细级别的说明。请向右滚动以查看说明:)

awk '                                                                                             ##Starting awk program from here.
/The SUMMARY/{                                                                                    ##Checking condition if line has string The SUMMARY then do following.
   found_summary=1                                                                                ##Setting found_summary as 1 here.
   val=""                                                                                         ##Nullifying variable val here.
}
/End processing summary for first university|End processing summary for second university/{       ##Checking condition if university string present in line then do following.
   if(found_summary){                                                                             ##Checking condition if found_summary is SET then do following.
     print val ORS $0                                                                             ##Printing variable val ORS and current line here.
   }
   val=found_summary=""                                                                           ##Nullifying variables val and found_summary here.
}
found_summary{                                                                                    ##Checking condition if found_summary is SET then do following.
   val=(val?val ORS:"")$0                                                                         ##Keep concatenating current line in val value.
}
'  Input_file                                                                                       ##Mentioning Input_file name here.

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