字符串比较不正常 [英] String comparison not Working properly
本文介绍了字符串比较不正常的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我的code:
x=$(awk -v i=$h -v j=17 'FNR == i {printf "%s ", $j}' newiptables.log)
s="SPT=80"
引用的日志文件是:
The log file referenced is:
Dec 26 09:17:51 localhost kernel: IN=eth0 OUT= MAC=00:10:c6:a8:da:68:00:90:7f:9c:50:5a:08:00 SRC=198.252.206.16 DST=10.128.1.225 LEN=313 TOS=0x00 PREC=0x00 TTL=64 ID=59334 PROTO=TCP SPT=80 DPT=56506 WINDOW=46535 RES=0x00 ACK PSH URGP=0
Dec 26 09:17:52 localhost kernel: IN=eth0 OUT= MAC=00:10:c6:a8:da:68:00:90:7f:9c:50:5a:08:00 SRC=198.252.206.16 DST=10.128.1.225 LEN=1440 TOS=0x00 PREC=0x00 TTL=64 ID=47303 PROTO=TCP SPT=80 DPT=56506 WINDOW=46535 RES=0x00 ACK URGP=0
Dec 26 09:17:52 localhost kernel: IN=eth0 OUT= MAC=00:10:c6:a8:da:68:00:90:7f:9c:50:5a:08:00 SRC=198.252.206.16 DST=10.128.1.225 LEN=1440 TOS=0x00 PREC=0x00 TTL=64 ID=47559 PROTO=TCP SPT=80 DPT=56506 WINDOW=46535 RES=0x00 ACK URGP=0
然后需要检查脚本中的下一个条件是:
Then the next condition in the script needs to be checked is:
if [[ "$x" == "$s" ]]
then
< process if condition is true>
else
< process if condition is false>
fi
if条件不工作
The if condition is not working
推荐答案
必要的修复:
s="SPT=80" # Not STP=80
的这已经被固定的问题。的
大概需要修复:
if [[ "$x" == "$s" ]] # Space between if and [[ highly recommended
then : it matches
else : it does not match
fi
由于在评论中指出,使用%S
与在 AWK
脚本尾随空格意味着尾随空格存储在$ X
,这将中断与$的
的比较。
As noted in the comments, the use of "%s "
with a trailing space in the awk
script means that the trailing space is stored in "$x"
and this will break the comparison with "$s"
.
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