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Top Forums Shell Programming and Scripting finding idle time of a process Post 302100869 by Krrishv on Saturday 23rd of December 2006 10:05:28 PM
Old 12-23-2006
Guru's

I think the below line attaching the process to tty.

TTY=$($PS -o tty4 $PID)

because when executing this line i get the error.

crypto $ UNIX95=1 ps -o tty4 $PID
ps: tty4 is not a valid field name

I think i have to give tty there. please let me know.

crypto $ UNIX95=1 ps -o tty
TT
pts/0
pts/0
crypto $ UNIX95=1 ps -o tty4
ps: tty4 is not a valid field name


Could you please let me know. my system contains the below terminal.

crypto $ w
7:04pm up 100 days, 14 mins, 2 users, load average: 0.01, 0.01, 0.01

User tty login@ idle JCPU PCPU what

root console 8:02pm2400:02 ksh -o vi
x033870 pts/0 5:36pm w


let me know anything i have to change.

Last edited by Krrishv; 12-23-2006 at 11:51 PM..
 

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TTY(4)							     Linux Programmer's Manual							    TTY(4)

NAME
tty - controlling terminal DESCRIPTION
The file /dev/tty is a character file with major number 5 and minor number 0, usually of mode 0666 and owner.group root.tty. It is a syn- onym for the controlling terminal of a process, if any. In addition to the ioctl(2) requests supported by the device that tty refers to, the ioctl(2) request TIOCNOTTY is supported. TIOCNOTTY Detach the calling process from its controlling terminal. If the process is the session leader, then SIGHUP and SIGCONT signals are sent to the foreground process group and all processes in the current session lose their controlling tty. This ioctl(2) call only works on file descriptors connected to /dev/tty. It is used by daemon processes when they are invoked by a user at a terminal. The process attempts to open /dev/tty. If the open succeeds, it detaches itself from the terminal by using TIOCNOTTY, while if the open fails, it is obviously not attached to a terminal and does not need to detach itself. FILES
/dev/tty SEE ALSO
chown(1), mknod(1), ioctl(2), termios(3), console(4), tty_ioctl(4), ttyS(4), agetty(8), mingetty(8) COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2003-04-07 TTY(4)
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