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leo2501

Member

From: Buenos Aires, Argentina

Registered: 2007-07-07

Posts: 634

dtach bashrc function

i recently discover dtach, i use screen a lot, and someone give me this .bashrc function to make easyer the use of it, so i want to make a similar one for dtach so i can see detached sessions or autoattach it if detached or create them

### Screen Function Mirror in terminal :: scr ###
function scr {
case $TERM in
    xterm*|rxvt*)
    if screen -ls | grep -q Main; then
        screen -xr Main
    else
        screen -S Main
        fi
    ;;
esac
}

i made this one for dtach but not acomplish what i want

### dtach function ###
function detach {
if ls /tmp | grep $1 ;then
    dtach -c /tmp/$1.dtach $1
else
    dtach -a /tmp/$1.dtach
fi
}

but when i use it i get:

[aleyscha@aleyscha 5 ~]$ ls /tmp | grep dtach
mc.dtach=
[aleyscha@aleyscha 6 ~]$ detach mc
mc-aleyscha/
mc.dtach=
dtach: /tmp/mc.dtach: Address already in use
[aleyscha@aleyscha 7 ~]$

Last edited by leo2501 (2008-10-18 17:41:23)

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Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
-- Antoine de Saint-Exupery

Procyon

Member

Registered: 2008-05-07

Posts: 1,807

Re: dtach bashrc function

You mixed up the true and false parts, I think.
If it exists you want to attach to it, not create it.

Anyway using ls is troublesome as you can see by the other results. Try this:

if [ -S /tmp/$1.dtach ]; then
  dtach -a /tmp/$1.dtach
else
  dtach -c /tmp/$1.dtach $1
fi

edit: not -f of course, but -S

Last edited by Procyon (2008-10-18 18:19:47)

leo2501

Member

From: Buenos Aires, Argentina

Registered: 2007-07-07

Posts: 634

Re: dtach bashrc function

Thankyou Procyon! now it works perfect!

---

Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
-- Antoine de Saint-Exupery

dav7

Member

From: Australia

Registered: 2008-02-08

Posts: 674

Re: dtach bashrc function

Small warning. I spent a good amount of time making myself a script that extensively used dtach to manage all my terminals - then discovered that I couldn't start up applications in the background when these new dtach-managed terminals were open

"app &" worked just fine, but then closing the terminal didn't. "exit" (or in my case, "x") left me with a dead terminal, and after I closed it I had to then figure out which copy of dtach and bash don't have a controlling terminal around them anymore and what their PIDs were, so I could force-kill them too.

-dav7

Last edited by dav7 (2008-10-19 04:35:02)

---

Windows was made for looking at success from a distance through a wall of oversimplicity. Linux removes the wall, so you can just walk up to success and make it your own.
--
Reinventing the wheel is fun. You get to redefine pi.

Mashi

Member

Registered: 2007-02-19

Posts: 38

Re: dtach bashrc function

I think dtach has this functionality built in... You're trying to open a process or attach to it if it already exists right?

dtach -A processfile command

leo2501

Member

From: Buenos Aires, Argentina

Registered: 2007-07-07

Posts: 634

Re: dtach bashrc function

I think dtach has this functionality built in... You're trying to open a process or attach to it if it already exists right?

dtach -A processfile command

yes i know, but im lazy and like those great bash functions to do anything with one command

---

Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
-- Antoine de Saint-Exupery