Re: webmin and STDERR

[Jamie C. <jca...@we...>]

tb...@gr... wrote:
> 
> Hi:
>    i m writing a small webmin program with mysql & perl-DBI.
>    i found that if  perl-DBI raise some error message then
>    the rest page of webmin will disappear.
>    so i try to print something myself to STDERR, and it stops rest pages
>    of webmin.
>    how can i show STDERR messages to webmin pages?
>    thanks for ur help!!!

The problem here is that when webmin is started at boot time from
an init script on some operating systems, STDERR is not available
so any webmin CGI that prints to it will immediately die with a
SIGPIPE error. This can be very annoying, and has caused several
problems with webmin in the past ..

If you want to see stuff that gets printed to STDERR (useful for
debugging purposes), the solution is to login as root and run
/etc/webmin/stop ; /etc/webmin/start . If you are calling some library
or program that may write to STDERR, your perl code should have
the line  open(STDERR, ">/dev/null");  somewhere at the top, so that
it doesn't die unexpectledy.

 - Jamie