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for 循环不结束，循环永远不会进行到第二个参数

tag-icon • tag-icon shell-script ksh infinite-loop
for 循环不结束，循环永远不会进行到第二个参数

我正在尝试使用“姓名in” 来循环遍历值列表。它使用行中的第一个值，但陷入永无止境的循环。

#!/bin/ksh
set -x
# created 7 JAn 2013 by L Cooper
# purpose is to verify completion of QAD online backup. If incomplete then email personnel
#[email protected]
[email protected]
TEST=1740               # Success code
SVR=IBM2
LOGDIR=/tmp             #Log location
LOGS="onlineeuro onlinedata online"             # logs to check
# Check QAD online backup log for code 3740, which indicates successful backup

#for logchk in onlineeuro onlinedata onlinena
for logchk in $LOGS
do
        while [ "$(/usr/bin/tail -n -2 $LOGDIR/$logchk.log | head -n +1 | tail -c 6 | head -c 4)" != "$TEST" ]
        do
           echo $LOGDIR/$logchk
           echo "The QAD online backup $logchk on $SVR may have errors...please check" | mailx -s "***TEST*** There mat be QAD onl
ine backup errors!!" $EMAILTO

        done
done

执行输出：

+ [email protected]
+ TEST=1740
+ SVR=IBM2
+ LOGDIR=/tmp
+ LOGS=onlineeuro onlinedata online
+ /usr/bin/tail -n -2 /tmp/onlineeuro.log
+ head -n +1
+ head -c 4
+ tail -c 6
+ [ 3740 != 1740 ]
+ echo /tmp/onlineeuro
/tmp/onlineeuro
+ mailx -s ***TEST*** There mat be QAD online backup errors!! [email protected]
+ echo The QAD online backup onlineeuro on IBM2 may have errors...please check
+ /usr/bin/tail -n -2 /tmp/onlineeuro.log
+ head -n +1
+ head -c 4
+ tail -c 6
+ [ 3740 != 1740 ]
+ echo /tmp/onlineeuro
/tmp/onlineeuro
+ mailx -s ***TEST*** There mat be QAD online backup errors!! [email protected]
+ echo The QAD online backup onlineeuro on IBM2 may have errors...please check
+ /usr/bin/tail -n -2 /tmp/onlineeuro.log
+ head -n +1
+ head -c 4
+ tail -c 6
+ [ 3740 != 1740 ]
+ echo /tmp/onlineeuro
/tmp/onlineeuro
+ mailx -s ***TEST*** There mat be QAD online backup errors!! [email protected]
+ echo The QAD online backup onlineeuro on IBM2 may have errors...please check
+ /usr/bin/tail -n -2 /tmp/onlineeuro.log
+ head -c 4
+ head -n +1
+ tail -c 6
+ [ 3740 != 1740 ]
+ echo /tmp/onlineeuro
/tmp/onlineeuro
+ mailx -s ***TEST*** There mat be QAD online backup errors!! [email protected]
+ echo The QAD online backup onlineeuro on IBM2 may have errors...please check
+ /usr/bin/tail -n -2 /tmp/onlineeuro.log

******不断重复******

答案1

似乎通过 while ... do ... done 循环，您的意图是编写一个“if”块，如下所示：

if  [ "$(/usr/bin/tail -n -2 $LOGDIR/$logchk.log | head -n +1 | tail -c 6 | head -c 4)" != "$TEST" ]
then
    #stuff
done

顺便说一句（但这与主题无关）“尾部、头部、尾部、头部”管道对我来说似乎相当模糊，您特别对日志文件的哪一行感兴趣？

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