Circular log buffer clears when log fills up

[Jari Takkala]

On Friday, June 01, 2007 2:06 PM, busybox-bounces at busybox.net wrote:

> Is this a known bug? Thanks!
> 
> Jari

The bug appears to be in logread. I can read all the messages in the shared memory segment by specifying the shmid and using a simple perl program. logread only returns 6279 bytes, the following perl code returns the full log buffer.

# logread | wc
       58      1015      6279
#  perl | wc
$SHM_MAX = 16384;
$id = 0;
shmread $id, $message, 0, $SHM_MAX;
print "\n$message\n";
      151      2659     16386

# ps ax | grep syslog
  373 ?        Ss     0:01 /sbin/syslogd -m 0 -C16

Regards,

Jari