Q: How to find out who/what is using ptys

2007-12-25 10:11:00

Hello,

The best answer seems to be to use fuser /dev/pts/* which gives a list of

processes using each pts device. These then can be looked up in a ps -efl

listing.

Similar to this is to use lsof (available from

same information (I haven't got and build lsof yet).

ps -efl gives a partial list of pts's used, but it's not as complete as the

above method.

listing all the pts files using ls -l /devices/pseudo | grep pt gives a list

of all pt devices and who was lat using them. It does not show which are

currently used and which are free.

Thanks to :

Seela Balkissoon <seela@cs.yorku.ca>

"Carsten B. Knudsen" <cbk@terma.dk>

For anyone who needs to increase the number of ptys, I refer them to the

Soalris 2 FAQ for this list, but essentially it says put the following in

/etc/system and boot -r:

* System V pseudo terminals 80 of them

set pt_cnt = 80

For BSD style pttys there is another line:

set npty = 80

The FAQ says you probably don't need to do this as you should never run out

of BSD style ptys.

Tom.

----------------------------------------------------------------------------

University College London,

Department of Electronic and Electrical Engineering,

Torrington Place, TEL: +44 (0)171 419 3898

London, FAX: +44 (0)171 388 9307

WC1E 7JE, U.K. MOBILE: +44 (0)370 264 543

----------------------------------------------------------------------------

Actived: 0 answers; - size: 3144 bytes; - view related info - Similar thread

Got something to say?

You must be logged in to post a comment.

thatsjava.com