On 25 Mar 2008, at 08:59, Mariella Petrini wrote:
> I have tried to configure MySQL to use/test a
> named pipe, fifo, without using syslog-ng, using
> initially either the logger command and a C program
> that reads from a fifo.
> 1) mkfifo -m 660 /tmp/logfile or mkfifo
> 2) start mysqld
> 3) mysqld blocks until the reader starts (this is
> 4) start the reader or logger
> 5) Mysqld dies because of failed assertion
> seek_offset == 0 in mf_iocache.c (initi_io_cache)
> Am I doing something wrong or MySQL 5.0 and 5.1.x
> does not support logs on pipes ?
The condition before that verifies that the file object is a pipe, so
someone has intended to use a pipe before as a log file; I can tell
by the comments that I wrote that assertion.
The caller wanted us to fseek to a particular location in the file,
which is impossible for pipes. If you're interested in it, that --
discovering why the caller wants to seek and how to fix it -- might
be an interesting and easy bug for you (or someone) to work on.
Chad Miller, Software Developer chad@stripped
MySQL Inc., www.mysql.com
Orlando, Florida, USA 13-20z, UTC-0400
Office: +1 408 213 6740 sip:6740@stripped