Question

根据下面的代码，我得到“/ usr / sbin / logcheck：第21行：第40行的语法错误：'else'意外”作为输出。我尝试过使用elif而不是其他但是也没用。任何帮助将不胜感激。

#!/bin/ksh
# Set the config variables

# *************************************************Configuration********************************************************
logFileName="production.log"
errorList="ActionController::"
EMAIL_SUBJECT="Application ERROR"
EMAIL_TO="viva@viva.com"
# **********************************************************************************************************************

logFilepath="data/vbmapp/vb-mapp-portal/log"

# Set the Log File path

if [ ! -s $logFilePath/$logFileName ]; then echo "ERROR- Log File Not Found , Please set the config properly"
exit
fi

# Get the first 30 characters of the first line linestart=$(awk 'NR>1{exit} ;1' $logFilePath/$logFileName | cut -c1-30)

lineend=""

# Never ending loop that will parse the Out.log file every 5 sec

while true ; do

# get the last line of file , till which we need to parse the log in this iteration 

lineend=$(awk 'END{print}' $logFilePath/$logFileName | cut -c1-30)

# if log file not found , Do nothing and wait for the next iteration 
if [ ! -s $logFilePath/$logFileName ]; then echo "Log File Not Found .. Waiting for the next iteration ..."
fi

# error checking , in case we dont find the linestart , parse the whole file 
grep "$linestart" $logFilePath/$logFileName if [ $? != 0 ] then
echo "cat $logFilePath/$logFileName | egrep $errorList | /usr/sbin/sendmail -s $EMAIL_SUBJECT $EMAIL_TO"
cat $logFilePath/$logFileName | egrep "$errorList" | /usr/sbin/sendmail -s $EMAIL_SUBJECT $EMAIL_TO

else

#parse the log file from linestart to lineend for errors

echo 'awk "/$linestart/,/$lineend/" $logFilePath/$logFileName | egrep "$errorList" | /usr/sbin/sendmail -s $EMAIL_SUBJECT $EMAIL_TO'

awk "/$linestart/,/$lineend/" $logFilePath/$logFileName | egrep "$errorList" | /usr/sbin/sendmail -s $EMAIL_SUBJECT $EMAIL_TO 

#set the last line as the first line for next iteration 

linestart=$lineend fi

#set the last line as the first line for next iteration 

linestart=$lineend

sleep 5

done

Answer 1

grep "$linestart" $logFilePath/$logFileName if [ $? != 0 ] then

如果正确复制/粘贴此行，那么这就是错误所在。这会对名为grep和if的文件运行[。

语句之间需要有一个语句分隔符（分号或换行符），例如if之前，then之前。

明确检查$?是一种常见的反模式;写这个条件的简洁和惯用方法是

if ! grep "$linestart" $logFilePath/$logFileName; then
    ...

作为编码风格的问题，在单个文件上使用cat是useless;像cat file | grep regex这样的内容最好写成grep regex file。

此外，错误消息应正确地重定向到标准错误（文件描述符2）：

echo "fail" >&2

`别人＆＃39;在korn shell脚本中出乎意料

1 个答案: