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Best way to run X Server on log in?
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notCarl
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Joined: 28 Sep 2016
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PostPosted: Sat Nov 05, 2016 5:31 am    Post subject: Best way to run X Server on log in? Reply with quote

I'm using i3wm and have to $startx when I log in for now. I tried adding xserver to run level with $rc-update add xdm , but it didnt work when I reboot.
How does everyone else start xserver on startup?

Thanks
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Buffoon
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PostPosted: Sat Nov 05, 2016 5:47 am    Post subject: Reply with quote

I do it from ~/.bash_profile, but there are many ways to skin this cat.
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The Doctor
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PostPosted: Sat Nov 05, 2016 5:48 am    Post subject: Reply with quote

Yes! As a matter of fact, I had the exact same setup.

You want to run a program when the user logs in on the local machine. This provides a possible solution. When the user logs on their environment is loaded. This means the problem can be solved using the .bashrc file (or equivalent depending on your shell of choice).

This script needs to do 2 things. 1) check to see if the log on is local or ssh. 2) check to see if X is already running or the nox kernel command line was passed 3) start X and disown the process. This has the advantage of also not running X as root which is a security risk.

To do this, add the following lines to your ~/.bashrc file
Code:
if [ $(echo $DISPLAY | wc -w) -eq 0 -a $(cat /proc/cmdline | grep nox | wc -l) -eq 0 ]; then
   if [ -n $SSH_CONNECTION ]; then
      exec startx > /dev/null 2>&1 &
      disown
   fi
fi
A bit dirty in places but it does the job. You can redirect to a log file instead of /dev/null if you prefer.
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First things first, but not necessarily in that order.

Apologies if I take a while to respond. I'm currently working on the dematerialization circuit for my blue box.
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khayyam
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PostPosted: Sat Nov 05, 2016 9:58 am    Post subject: Reply with quote

The Doctor wrote:
Code:
if [ $(echo $DISPLAY | wc -w) -eq 0 -a $(cat /proc/cmdline | grep nox | wc -l) -eq 0 ]; then
   if [ -n $SSH_CONNECTION ]; then
      exec startx > /dev/null 2>&1 &
      disown
   fi
fi

doc ... UUoC, and wc ... all you need do is check if $DISPLAY is empty, I'm not sure the second test is needed (as $DISPLAY would qualify whether 'nox' is in use), anyhow, use 'test' for both conditions:

Code:
if [[ -z ${DISPLAY} ]] && (grep nox /proc/cmdline >/dev/null 2>&1) ; then

Also, 'disown' is superfluious, with 'exec' you are replacing the shell with 'command' (and so shell goes bye-bye).

Also, you, or the OP, might use an interactive question/answer:

Code:
ask() {   
    echo -n "$@" '[y/n] ' ; read ans
    case "$ans" in
        y*|Y*) return 0 ;;
        *) return 1 ;;
    esac
}

if [[ -z $DISPLAY ]] ; then
    ask "startx?" && exec startx
fi

best ... khay
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Tony0945
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Joined: 25 Jul 2006
Posts: 2882
Location: Illinois, USA

PostPosted: Sat Nov 05, 2016 2:49 pm    Post subject: Re: Best way to run X Server on log in? Reply with quote

notCarl wrote:
I'm using i3wm and have to $startx when I log in for now. I tried adding xserver to run level with $rc-update add xdm , but it didnt work when I reboot.
Did you make your session file in /etc/X11/Sessions executable? I got bitten by this adding lumina by hand (the ebuild doesn't do it). The symptom is, you log in, xdm seems to be ldoing something, then returns to the login screen. What's in your $HOME/.xsession?

You can make a nice little menu by creating /etc/X11/xdm/Xresources.custom
Code:
xlogin*login.translations: #override \
        Ctrl<Key>R: abort-display()\n\
        <Key>F1: set-session-argument(failsafe) finish-field()\n\
        <Key>F2: set-session-argument(lumina) finish-field()\n\
        <Key>F3: set-session-argument(fluxbox) finish-field()\n\
        <Key>Delete: delete-character()\n\
        <Key>Left: move-backward-character()\n\
        <Key>Right: move-forward-character()\n\
        <Key>Home: move-to-begining()\n\
        <Key>End: move-to-end()\n\
        Ctrl<Key>KP_Enter: set-session-argument(failsafe) finish-field()\n\
        <Key>KP_Enter: set-session-argument() finish-field()\n\
        Ctrl<Key>Return: set-session-argument(failsafe) finish-field()\n\
        <Key>Return: set-session-argument(menu) finish-field()
The only change made to /etc/xdm/Xresources is adding the argument "menu" to <Key>Return.
This will cause xdm to launch /etc/X11/Sessions/menu instead of /etc/X11/Sessions/XSession or what a myriad of environment variables have set up.

Here is my /etc/X11/Sessions/menu file (don't forget to make it executable).
Code:
#!/bin/bash
xmessage "" -buttons " MATE , Lumina , Fluxbox" -center  -font '-*-bitstream vera sans-*-r-*-*-18-140-100-c-100-*-*' -bg black -fg white

SELECTION=$?

logger "chose $SELECTION"
case $SELECTION in
101) exec /etc/X11/Sessions/MATE ;;
102) exec /etc/X11/Sessions/lumina ;;
103) exec /etc/X11/Sessions/fluxbox ;;
esac
Edit this for whatever session managers you have. The logger line is unnecessary, I just like t have the selection logged. I only wish I knew how to change the font to be much bigger.
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Buffoon
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Joined: 17 Jun 2015
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PostPosted: Sat Nov 05, 2016 6:26 pm    Post subject: Reply with quote

FWIW, here's mine
Code:
# /etc/skel/.bash_profile

# This file is sourced by bash for login shells.  The following line
# runs your .bashrc and is recommended by the bash info pages.
[[ -f ~/.bashrc ]] && . ~/.bashrc

PATH=$PATH:~/bin

if [ -z "$DISPLAY" ] && [ $(tty) == /dev/tty1 ]; then
        sleep 1
        startx
        sleep 3
        exit
fi
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