Question regarding FLOCK or POSIX with Sendmail 8.13.x and MailScanner.

[Scott Silva]

Duncan, Brian M. spake the following on 11/1/2006 3:33 PM:
>> Posix is a "safer" method of locking, so you shouldn't have
> 
>> problems switching. There are risks of NOT switching to
> 
>> posix. There have been symptoms as benign as mail delivered
> 
>> more than once, to unmatched qf/df files being left behind.
> 
>> You have been lucky what you have not had any problem with
> 
>> flock, and you should not depend on MailScanner detecting the
> 
>> proper setting.  In the current versions of MailScanner.conf
> 
>> you have the following comment;
> 
> OK Thanks, I am not familiar with different types of locking files under
> Unix/Linux.
> 
> 
> 
>> # How to lock spool files.
>> # Don't set this unless you *know* you need to.
>> # For sendmail, it defaults to "posix".
>> # For sendmail 8.12 and older, you will probably need to
> 
>> change it to flock, # particularly on Linux systems.
>> # For Exim, it defaults to "posix".
>> # No other type is implemented.
>> Lock Type =
>>
> 
>> It does not mention any type of auto detection, I believe
> 
>> because Julian had too many problems with its function.
> 
>> Change it to posix with sendmail 8.13.
>> MailScanner --lint will tell you what is currently running.
> 
> I figured it was "auto detect" based on the For sendmail, it defaults to
> posix comment above. (Mine are using Sendmail, and it's blank it is
> defaulting to flock)
> 
> I will be setting them all to Posix then specifically.
> 
> Thanks
That default changed in 4.50.15-1. Are you running something older?
Does MailScanner -V work?


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MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!