# How to get columns TIME and TTY of commands ps -A? **URL:** \ **Category:** Ubuntu\ **Created:** [July 16, 2012, 12:20pm UTC](https://community.unix.com/t/how-to-get-columns-time-and-tty-of-commands-ps-a/313622 "2012-07-16T12:20:18Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![newbie\_member](https://community.unix.com/letter_avatar/newbie_member/32/5_5575768a8748004e209b776fc1b2916d.png) [@newbie\_member](https://community.unix.com/u/newbie_member)\ **Post date:** [July 16, 2012, 12:20pm UTC](https://community.unix.com/t/how-to-get-columns-time-and-tty-of-commands-ps-a/313622/1 "2012-07-16T12:20:18Z")
Hi, Commands ps -A include four parameters are PID, TTY, TIME and CMD. I can not found pathnames of TTY and TIME which I can read from file in C language to get information display on screen. Thank you! Ex: PID TTY TIME CMD 1 ? 00:00:01 init ---
**Author:** ![jim\_mcnamara](https://community.unix.com/letter_avatar/jim_mcnamara/32/5_5575768a8748004e209b776fc1b2916d.png) [@jim\_mcnamara](https://community.unix.com/u/jim_mcnamara)\ **Post date:** [July 16, 2012, 1:14pm UTC](https://community.unix.com/t/how-to-get-columns-time-and-tty-of-commands-ps-a/313622/2 "2012-07-16T13:14:37Z")
Do you mean the /proc directories? /proc/pid, from your example /proc/1 is the path. However TIME comes from /var/adm/utmpx - you will have to use a structure defined in utmpx.h to read the file. example code here: [loginacct/utmpx\_login.c (from "The Linux Programming Interface")](http://man7.org/tlpi/code/online/dist/loginacct/utmpx_login.c.html) As to the TTY, what are you trying to do? /proc/pid/fd/0 is the tty for the process, if one exists. A ? in ps -A output means the process does not have a controlling terminal. ---
**Author:** ![newbie\_member](https://community.unix.com/letter_avatar/newbie_member/32/5_5575768a8748004e209b776fc1b2916d.png) [@newbie\_member](https://community.unix.com/u/newbie_member)\ **Post date:** [July 18, 2012, 10:09am UTC](https://community.unix.com/t/how-to-get-columns-time-and-tty-of-commands-ps-a/313622/3 "2012-07-18T10:09:37Z")
Thank you, but I see /proc/pid/fd/0 a socket, I cannot read it by C language cause I need read "TTY" to display the screen.