Re: GNU emacs locks files modified with CVS

[gebser@speakeasy.net]

Of course everyone can set up their systems however they wish, but I 
use:

export DISPLAY=$(who -lum|awk -F '(' '{print $2}'|awk -F ')' '{print $1}'):0

in my ~/.bashrc and have no problem logging in and/or running remotely
whatever X apps I want.

Because it would take a lot of thinking to hash out which is the correct 
file to put this in, whether the DISPLAY is a resource or not, whether 
this variable should be set for all interactive shells or just for 
logins, and because I don't wish to argue any of this, I'll just say 
that I disagree and believe that .bashrc *is* the proper place for 
setting DISPLAY.  As said at the outset, everyone can set up their 
systems however they wish.


hth,
ken


At 07:42 (UTC+0100) on 17 Dec 2003 Maurizio Loreti said:

= Pepijn Kenter <kenter_remove_spam@tpd.tno.nl> writes:
= 
= > gebser@speakeasy.net wrote:
= > > There's two ways which will keep/set the DISPLAY variable:
= > > First, if the DISPLAY variable is set in user1 and you do "su
= > > user2", then the environment of user1 will carry into user2.  IOW,
= > > you're good. Second, if you, instead, do "su - user2", then you will
= > > have a fresh environment, that of user2.  If user2's environment
= > > doesn't have the DISPLAY variable set properly, you can do this by
= > > setting this in user2's ~/.bashrc file... if user2's default shell
= > > is bash-- if you're using some other shell, consult the manpage for
= > > the proper file and command syntax for setting the environment.
= > >
= > Thanks for your reply but the .bashrc seems to me the wrong place to
= > set the DISPLAY variable.
= > If you login from another machine it won't be set properly.
= 
= Correct.  The right place is .bash_profile, executed at login.
= 
= FWIW, this is from my own .bash_profile:
= 
= ,-----
= | # Tries to figure out a correct DISPLAY environment variable
= | 
= | if [ -n "$DISPLAY" ]
= | then
= |   # if DISPLAY is set, we assume it is also valid; if it is not,
= |   # the user may always change it later ($DISPLAY is printed at
= |   # the end of the login procedure).
= | 
= |   REMOTE="${DISPLAY%%:*}"
= | else
= |   temp0=$(who am i | awk '{print $2}')
= |   
= |   if [ "$temp0" = "console" ]
= |   then
= |     REMOTE="localhost"
= |     DISPLAY=":0.0"
= |   else
= |     temp1=$(who --lookup | grep "$temp0 " | uniq | awk '{print $6}')
= |     # Note the blank-------------------^
= |     if [ -n "$temp1" ]
= |     then
= |       temp2=$(echo $temp1 | sed -e 's/(//' -e 's/)//')
= |       temp3=$(echo $temp2 | cut -d. -f2)
= |       if [ "$temp3" = "pd" ]
= |       then
= |         # If on host.pd.infn.it, DISPLAY="host:0.0";
= |         # if not, DISPLAY="host.dom.ain:0.0"
= |         REMOTE=$(echo $temp2 | cut -d. -f1)
= |       else
= |         REMOTE="${temp2%%:*}"
= |       fi
= |       DISPLAY="${REMOTE}:0.0"
= |       unset temp2 temp3
= |     else
= |       REMOTE=""
= |       DISPLAY=":0.0"
= |     fi
= |     unset temp1
= |   fi
= |   unset temp0
= | fi
= | 
= | export REMOTE DISPLAY
= | echo "DISPLAY is now: $DISPLAY"
= `-----
= 
=