Re: running linux cmd in servlet/jsp

Hi, OOI,

When you input
/sbin/ifconfig eth1 | grep HWaddr | awk '{print $5; }'
in console, then it will work fine. Because shell(interpreter) can parse
your command and fork three processes, ifconfig eth1, grep HWaddr, and
awk '{print $5; }' these are connected by pipe.

But your code
KL>   proc1 = rt1.exec("/sbin/ifconfig eth1 | grep HWaddr | awk '{print $5; }' ");
must not work because pipe "|" and followed commands will be passed to ifconfig as arguments.

So you should write
proc 1 = rt1.exec("/bin/sh -c \"/sbin/ifconfig eth1 |grep HWaddr | awk '{print \\$5; }'\"");
or use shell script like following.
---snip
#!/bin/sh
/sbin/ifconfig eth1 |grep HWaddr |awk '{print $5; }'
---snip

I highly recommend shell script because it is easy to change commands.

Regards,
Watanabe

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