掃描實時文件，並在遇到連續5個相同的行

mysql的日誌執行某些命令有一樣的東西：掃描實時文件，並在遇到連續5個相同的行

1649560 Query select * from actions where uniqueid like 'ernie-1328697839.1233158-%-dequeue' and class='queue' and server='ernie' and time<='1328698322' and action='dequeue' limit 1 
1649560 Query select * from actions where uniqueid like 'ernie-1328697839.1233158-%-dequeue' and class='queue' and server='ernie' and time<='1328698322' and action='dequeue' limit 1 
1649560 Query select * from actions where uniqueid like 'ernie-1328697839.1233158-%-dequeue' and class='queue' and server='ernie' and time<='1328698322' and action='dequeue' limit 1 
1649560 Query select * from actions where uniqueid like 'ernie-1328697839.1233158-%-dequeue' and class='queue' and server='ernie' and time<='1328698322' and action='dequeue' limit 1 
1649560 Query select * from actions where uniqueid like 'ernie-1328697839.1233158-%-dequeue' and class='queue' and server='ernie' and time<='1328698322' and action='dequeue' limit 1 
1649560 Query select * from actions where uniqueid like 'ernie-1328697839.1233158-%-dequeue' and class='queue' and server='ernie' and time<='1328698322' and action='dequeue' limit 1 
1649560 Query select * from actions where uniqueid like 'ernie-1328697839.1233158-%-dequeue' and class='queue' and server='ernie' and time<='1328698322' and action='dequeue' limit 1 
1649560 Query select * from actions where uniqueid like 'ernie-1328697839.1233158-%-dequeue' and class='queue' and server='ernie' and time<='1328698322' and action='dequeue' limit 1

我想要一個bash shell腳本，將做follwoing：

的腳本將掃描文件mysql.log實時（類似tail -F mysql.log）
如果遇到連續5個相同的行那麼將調用一些命令（比如echo "yes"）

來源

2012-02-09 user973430

awk '$0 != l { l=$0; c=0 } 
     l=$0 {c++; if (c>=5) {system("YOURCOMMAND HERE")}}' LOGFILE

可以爲你做它...但你通過實時是什麼意思？如果它必須不斷運行，爲它設置一些fifo機制，或類似的東西。或者根本：

tail -F LOGFILE | <THEABOVE_AWK_SCRIPT>

來源

2012-02-09 10:36:54

通過實時我的意思，該腳本將不斷運行，掃描mysql.log（像尾-f mysql.log |同時readline的） – user973430 2012-02-09 12:34:44

謝謝.. :)最好使用「尾巴 - F「 – user973430 2012-02-09 13:05:48

@ user973430你是對的，更正了。如果您認爲：http://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work – 2012-02-09 14:22:03

掃描實時文件，並在遇到連續5個相同的行

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