problems with devfs amd /dev/fd/

[Jose M Rodriguez]

Doug White escribió:

>On Tue, 4 Jan 2005, Jose M Rodriguez wrote:
>
>  
>
>>Hi,
>>
>>trying to import foomatic-rip, I found great changes under /dev/fd/
>>going from RELENG_4 to RELENG_5.
>>
>>Seems that /dev/fd/3 is used by several pipe construct like foomatic-rip
>>to get a free backwards error channel.
>>
>>Digging a bit, I found that now, I need mount fdescfs to get this.  I
>>think this is not well documented in release notes.
>>    
>>
>
>Nothing in the FreeBSD base system depends on /dev/fd. foomatic-rip a
>third-party program. It would be appropriate for the port to print a
>message reminding the user to mount fdescfs if they plan to use this
>application, but not appropriate to enable it by default just for this one
>port.
>
>  
>
>>Also, seems that support /dev/fd/3 in devfs may be a good idea.  Add a
>>sysctl to control how many /dev/fd/n devfs create will be even better.
>>    
>>
>
>fdesc is populated automatically based on the calling program. If the
>program has file descriptor 3 open then /dev/fd/3 will be available.
>Likewise, if it is closed, /dev/fd/3 will not exist.
>
>  
>
Yes, but with fdescfs mounted, not with only devfs.  This is not a so 
clean change from RELENG_4 to RELENG_5. I think this need a simple note 
on release docs.

--
  josemi