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From <>
Subject RE: JSVC problems with Tomcat 5.0.19 & Linux
Date Tue, 01 Jun 2004 15:20:01 GMT
Unix system (even Linux) does not allow normal users to bind at ports

Use some port number >1024 or you need to configure your user for
permission to bind to a port <1024.

Changa fer.

-----Original Message-----
From: Ashwin Desai [] 
Sent: Tuesday, June 01, 2004 8:40 PM
To: Tomcat Users List
Subject: JSVC problems with Tomcat 5.0.19 & Linux


I am trying to get Tomcat 5.0.19 to run as a non-root user using commons
daemon - jsvc on a linux machine.

uname -a
Linux rx2600 2.4.20-cgl-1.12-mckinley-smp #1 SMP Tue Sep 23 09:21:46 MDT
2003 ia64 unknown

I got the following error in the log file

syscall failed in set_caps
service exits with a value of 4

After looking at a few solutions on the internet, I commented out the
set_caps(CAPS) & set_caps(CAPSMIN) lines from jsvc-unix.c and tried

Now, tomcat started properrly but had problems binding to port 80

It looks like these set_caps() calls are needed to get the proper
permissions to bind to port 80. 

/* set capabilities enough for binding port 80 setuid/getuid */
    if (set_caps(CAPS)!=0)

Anyone else has seen this problem before. Any suggestions/solutions ??

Thanks a lot in advance.


Ashwin Desai.

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