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Thanks shaomiao. By this way, I did manage to see the error message:

qoo(QOO)

Can\'t open -f: No such file or directory at /opt2/snort/notify/snortnotify.pl line 1.
ERROR: file doesn\'t exist!

It is weird to me. Because when I manually call \"echo \"pattern\" | /usr/bin/perl /opt2/getdesc.pl >> /var/log/test.output| /usr/bin/perl /opt2/snort/notify/snortnotify.pl -f /opt2/snort/notify/notify.conf

and \"perl /opt2/snort/notify/snortnotify.pl -f /opt2/snort/notify/notify.conf\" has been tested thousand times. I guess this is not a appropriate call in the shell script.
It didn\'t produce any error message and worked fine.

(#1323901@0)
Last Updated: 2003-8-8
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工作学习 / IT技术讨论 / 一个有关在shell里调用perl的问题,有人能帮我吗? -qoo(QOO); 2003-8-8 (#1323699@0)

有, next question? -mssg(mssg); 2003-8-8 (#1323717@0)

谢谢你,是这样的. -qoo(QOO); 2003-8-8 {611} (#1323738@0)
我的系统当匹配成功的时候会自动trigger一个shell script:alert.sh,alert.sh里会调用两个perl script, 如下:
---------------------------------------------
#!/bin/sh
while read line
do
echo $line | mail -s "test alert" abc@company.ca;
echo $line | perl /opt2/getdesc.pl | perl /opt2/snort/notify/snortnotify.pl -f /opt2/snort/notify/notify.conf;
done
-------------------------------------------------

自动匹配到的文本是shell script 和perl 的input.
我用sh -x alert.sh 然后输入文本,没有问题,程序运行良好.但自动运行时好象没有作用. mail -s 是用来debug的,至少自动trigger alert.sh 没有问题.
问题在哪里呢?

Does "alert.sh" have execution permission? -shaomiao(少淼); 2003-8-8 (#1323762@0)

yes. In alert.sh, " mail -s " has been successfully called. -qoo(QOO); 2003-8-8 (#1323782@0)

what do you mean "auto execute", by CRONTAB? If you use CRONTAB, you cannot use echo to output text to screen, but can redirect to a file -wander2001(猫行天下); 2003-8-8 (#1323772@0)

NO. It's using a program to do so other than crontab. Crontab is scheduled job only. -qoo(QOO); 2003-8-8 {141} (#1323785@0)
As I said, "mail -s" can be successfully called up so alert.sh has no problem to be automatically called up. I was hung up at perl portion.

Try to use full path of perl? -wade(wade); 2003-8-8 (#1323787@0)

Tried but in vain. -qoo(QOO); 2003-8-8 (#1323803@0)

You mean you already tried the full path for "perl" command , not your perl script? -wander2001(猫行天下); 2003-8-8 (#1323819@0)

yes. New script: -qoo(QOO); 2003-8-8 {324} (#1323826@0)
---------------------------------------------
#!/bin/sh
while read line
do
echo $line | mail -s "test alert" abc@company.ca;
echo $line | /usr/bin/perl /opt2/getdesc.pl | /usr/bin/perl /opt2/snort/notify/snortnotify.pl -f /opt2/snort/notify/notify.conf;
done
-------------------------------------------------

What is the error code? -wade(wade); 2003-8-8 (#1323824@0)

What if I could do some debug?! I didn't see any error, neither did I know where to find the error. -qoo(QOO); 2003-8-8 (#1323837@0)

If the code not hang there, type echo $? as soon as the code exit -wade(wade); 2003-8-8 (#1323854@0)

I guess the problem is some over-looked detail. -shaomiao(少淼); 2003-8-8 {458} (#1323862@0)
Try something like:

#!/bin/sh
touch /tmp/content.$$
touch /tmp/err.$$
while read line
do
echo $line >> /tmp/content.$$
echo $line | /usr/bin/perl /opt2/getdesc.pl | /usr/bin/perl /opt2/snort/notify/snortnotify.pl -f /opt2/snort/notify/notify.conf 1> /tmp/err.$$ 2>&1
echo $? >> /tmp/err.$$
done

Then,
cat /tmp/err.<pid>

What is the return code? Any error message?

cat /tmp/content.<pid> | alert.sh

Does the perl portion work fine?

why not just do a "echo input lines | sh -x alert.sh 1>/tmp/alert.sh.$$ 2>&1" ? -ztech(zoo technician); 2003-8-8 (#1323874@0)

He/she has done that from command line and it worked fine. -shaomiao(少淼); 2003-8-8 (#1323888@0)

Thanks shaomiao. By this way, I did manage to see the error message: -qoo(QOO); 2003-8-8 {573} (#1323901@0)
Can\'t open -f: No such file or directory at /opt2/snort/notify/snortnotify.pl line 1.
ERROR: file doesn\'t exist!

It is weird to me. Because when I manually call \"echo \"pattern\" | /usr/bin/perl /opt2/getdesc.pl >> /var/log/test.output| /usr/bin/perl /opt2/snort/notify/snortnotify.pl -f /opt2/snort/notify/notify.conf

and \"perl /opt2/snort/notify/snortnotify.pl -f /opt2/snort/notify/notify.conf\" has been tested thousand times. I guess this is not a appropriate call in the shell script.
It didn\'t produce any error message and worked fine.

估计是你调用perl的时候出的问题，因为你在自动跑壳程序(shell) 的时候路径(path) 没有设置，试试这个： -tztz(退休老团长); 2003-8-8 {112} (#1324376@0)
在你的unix shell里面敲一行 which perl
然后把那个输出贴到你的壳程序里面去，把所有的 perl 命令全部换成这个输出

Give me your input, please! Thx -qoo(QOO); 2003-8-8 (#1323808@0)
When it runs without manual input, how does it get the input? What is your command line? -ztech(zoo technician); 2003-8-8 (#1323821@0)

My program will do some pattern matching. Once it matches, it will trigger this alert.sh and pipe matched text to this shell script. -qoo(QOO); 2003-8-8 (#1323834@0)

I see. replace mail with /usr/bin/mail and perl with /usr/bin/perl. Commend out the perl script to see if mail works. And then replace each perl with a simple perl that writes to a file.. U get the idea. -ztech(zoo technician); 2003-8-8 (#1323842@0)

OH, IN YOUR JAVA/PERL/SHELL/SED/AWK PROGRAM, REPLACE "sh" with "/bin/sh" OR EVEN "/bin/bash" which ever is more appropriate. -ztech(zoo technician); 2003-8-8 (#1323849@0)

谢谢大家的指点,我发现问题在这里, shell script里: -qoo(QOO); 2003-8-11 {400} (#1327850@0)
echo $line | /usr/bin/perl /opt2/getdesc.pl | /usr/bin/perl /opt2/snort/notify/snortnotify.pl

第一个pipe后没有把结果传个第二个pl做为输入.若我改成:
echo $line | /usr/bin/perl /opt2/getdesc.pl >> /var/log/test.output;
cat /var/log/test.output | /usr/bin/perl /opt2/snort/notify/snortnotify.pl;

就可以了. 但是我还是希望用pipe来连接两个perl的输入输出.各位大虾能再帮我想想这个pipe的问题吗? 谢谢了.

让俺瞅瞅你的getdesc,pl, 是不是没有用标准输出 (print) ? -tztz(真爽); 2003-8-11 (#1327986@0)

这次终于发现问题所在了.不是上面pipe的问题.其实是: -qoo(QOO); 2003-8-11 {123} (#1328065@0)
echo $line 后系统自动在原来的文本前加了一个<33>(不太明白为什么会加了这么个东西.),由于这个增加,使得perl里不能再匹配到文本了.

@Florida

Thanks shaomiao. By this way, I did manage to see the error message:

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