Difference between revisions of "CDM"

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[[Category:Boot process (English)]]
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[[Category:Display managers]]
[[Category:Display managers (English)]]
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[[cs:CDM]]
[[Category:Eye candy (English)]]
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{{Article summary start}}
[[Category:HOWTOs (English)]]
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{{Article summary text|Describes installing, configuring and using CDM, minimalistic replacement for login-managers.}}
{{i18n|CDM}}
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{{Article summary heading|Related articles}}
'''[http://cdm.ghost1227.com CDM]''' is a minimalistic, yet full-featured replacement for login-managers like [[slim]], [[Automatic_login_manager_startup#Installation|kdm]], [[Automatic_login_manager_startup#Installation|gdm]] and [[qingy]] that provides a fast, dialog-based login system without the overhead of the X Window System or the instability of qingy. Written in pure bash, CDM has no other dependencies, yet supports multiple users/sessions and can start virtually any DE/WM.
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{{Article summary wiki|Display Manager}}
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{{Article summary end}}
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'''CDM''' is a minimalistic, yet full-featured replacement for login-managers like [[slim]], [[Automatic_login_manager_startup#Installation|kdm]], [[Automatic_login_manager_startup#Installation|gdm]] and [[qingy]] that provides a fast, dialog-based login system without the overhead of the X Window System or the instability of qingy. Written in pure bash, CDM has almost no dependencies, yet supports multiple users/sessions and can start virtually any DE/WM.
  
A package is available in the [http://aur.archlinux.org/packages.php?K=cdm AUR].
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==Installation==
  
==Configuration==
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Install the {{AUR|cdm-git}} package which is available in the [https://aur.archlinux.org/ AUR].
  
You can configure CDM by editing {{Filename|/etc/cdmrc}}. It is fully documented and should be relatively easy to figure out.
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Now ensure no other other display managers get started by disabling their systemd services with {{ic|systemctl disable}}.
  
At least these should be edited before you start using CDM:
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For example, if you were using the Gnome Display Manager, you would stop it from starting at boot by running
wmbinlist=(awesome openbox-session startkde startxfce4 gnome-session)
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wmdisplist=(Awesome Openbox KDE Xfce Gnome)
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Add whatever WM/DE you have.
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If you typically start your WM from ''.xinitrc'' you can enable the ''usexinit'' option in {{Filename|/etc/cdmrc}}. You can also start your WM from a script, by including the path in your binlist, like so:
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# systemctl disable gdm.service
  
wmbinlist=(/path/to/start-script)
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There is no need to enable a systemd service for CDM. Rather, a script called zzz-cdm.sh will be placed into {{ic|/etc/profile.d}}. This script (along with the rest of the scripts in /etc/profile.d) is run when you login to a login shell. However, in order to prevent a sceanario where a broken configuration prevents a user from accessing both their desktop and a virtual terminal, the script checks to see which virtual terminal it is being run on, and will by default only run on tty1.
  
===/etc/inittab or /etc/rc.conf===
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Since the script is placed in the global {{ic|/etc/profile.d}} directory, CDM will be run for all users who login on tty1. If you would rather it only run for you, take away executable permissions from {{ic|/etc/profile.d/zzz-cdm.sh}} and copy the contents of that file into your {{ic|~/.bash_profile}} for bash, or {{ic|~/.zprofile}} for zsh.
After installing CDM and configuring it to your liking, you should edit {{Filename|/etc/inittab}} or {{Filename|/etc/rc.conf}} to make sure no other display managers get started.
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*{{Filename|/etc/inittab}}
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==Configuration==
#x:5:respawn:/usr/bin/xdm -nodaemon
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#x:5:respawn:/usr/sbin/gdm -nodaemon
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#x:5:respawn:/usr/bin/kdm -nodaemon
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#x:5:respawn:/usr/bin/slim >& /dev/null
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They should all be commented.
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*{{Filename|/etc/rc.conf}}
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You can configure CDM by editing {{ic|/etc/cdmrc}}. It is fully documented and should be relatively easy to figure out. You can also have user specific config files by copying {{ic|/etc/cdmrc}} to {{ic|$HOME/.cdmrc}}.
DAEMONS=(... !gdm)
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gdm (or kdm, or xdm, ...) should be disabled or removed from your DAEMONS array.
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CDM itself will start automatically, hence there is no need for further configuration in this respect.
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===Menu items===
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Menu items are configured using three arrays: '''binlist''', '''namelist''' and '''flaglist'''. Order of items in these arrays is important, items with the same index describe the same menu item. '''binlist''' contains commands which are executed, '''namelist''' contains names which are shown in the menu and '''flaglist''' contains type of the programs specified in '''binlist''', either 'X' for X sessions or 'C' for console programs. Basically X sessions are started using [[startx]] (the item in '''binlist''' is argument of '''startx''' command) and console programs are started using '''exec'''.
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There is a sample configuration:
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binlist=(
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  "~/.xsession"                                  # Launch your X session,
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  "/bin/bash --login"                          # or just execute your shell,
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  "/usr/bin/fbterm"                            # or start a frame buffer console,
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  "/usr/bin/cdm ~/.submenu.cdmrc"  # or go to a submenu :)
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)
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namelist=("X session" Console FBTerm "Sub menu")
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flaglist=(X C C C)
  
 
===Theming===
 
===Theming===
Themes are located in {{Filename|/usr/share/cdm/themes}}, and can be switched via your {{Filename|/etc/cdmrc}}.
 
The theme syntax is fairly self explanatory, the best way wo start a new theme would be to duplicate and edit an existing theme.
 
  
==Starting X==
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Themes are located in {{ic|/usr/share/cdm/themes}}, all you have to do is pass full path of the theme file to '''dialogrc''' variable in {{ic|/etc/cdmrc}}, for example
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dialogrc=/usr/share/cdm/themes/cdm
  
Login to the console and select your prefered session (or console, if allowed) from the menu.
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The theme syntax is fairly self explanatory, the best way to start a new theme would be to duplicate and edit an existing theme.
  
Additional users may be logged in by switching to tty1 (ctrl+alt+f1). If the user is already logged in, CDM will automatically activate their pre-existing session.
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===Starting X===
  
==Own commands==
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You can affect the process of starting X server in several ways - use of [[ConsoleKit]] is optional, you can specify on which tty the X server will be started (specify either number or 'keep' if you want to run X server on current tty), and finally you can specify custom X server arguments.
{{Note|CDM now has an option to enable built-in shutdown support, however, this section is left as a general reference.}}
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If you want to add entries like shutdown which needs parameters you have to save the command in an executable script and add the script with full path to the wmbinlist array.
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==Custom commands for power operations==
E.g. shutdown:
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*/script/shutdown
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#!/bin/bash
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shutdown -h now
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*/etc/cdmrc
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If you want to add entries for power operations, like shutdown, reboot etc., you can include them in '''binlist''' array.
wmbinlist=( ... /script/shutdown ... )
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==More resources==
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===ConsoleKit method===
[http://cdm.ghost1227.com Homepage (Standard)] / [http://cdm.ghost1227.com/X11 Homepage (Graphic)]
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[http://bbs.archlinux.org/viewtopic.php?id=84408 The Console Display Manager] - Archlinux Forums thread about CDM
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If you use [[ConsoleKit]] for session authentication, see [[ConsoleKit#Use_dbus_for_power_operations]].
  
[http://aur.archlinux.org/packages.php?ID=31879 Aur package]
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===systemd method===
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If you use [[systemd]], see [[Systemd#Power_Management]].
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==More resources==
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*[https://bbs.archlinux.org/viewtopic.php?id=84408 The Console Display Manager] - Archlinux Forums thread about CDM
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*[https://github.com/ghost1227/cdm GitHub page]

Revision as of 13:29, 8 August 2013

Template:Article summary start Template:Article summary text Template:Article summary heading Template:Article summary wiki Template:Article summary end CDM is a minimalistic, yet full-featured replacement for login-managers like slim, kdm, gdm and qingy that provides a fast, dialog-based login system without the overhead of the X Window System or the instability of qingy. Written in pure bash, CDM has almost no dependencies, yet supports multiple users/sessions and can start virtually any DE/WM.

Installation

Install the cdm-gitAUR package which is available in the AUR.

Now ensure no other other display managers get started by disabling their systemd services with systemctl disable.

For example, if you were using the Gnome Display Manager, you would stop it from starting at boot by running

# systemctl disable gdm.service

There is no need to enable a systemd service for CDM. Rather, a script called zzz-cdm.sh will be placed into /etc/profile.d. This script (along with the rest of the scripts in /etc/profile.d) is run when you login to a login shell. However, in order to prevent a sceanario where a broken configuration prevents a user from accessing both their desktop and a virtual terminal, the script checks to see which virtual terminal it is being run on, and will by default only run on tty1.

Since the script is placed in the global /etc/profile.d directory, CDM will be run for all users who login on tty1. If you would rather it only run for you, take away executable permissions from /etc/profile.d/zzz-cdm.sh and copy the contents of that file into your ~/.bash_profile for bash, or ~/.zprofile for zsh.

Configuration

You can configure CDM by editing /etc/cdmrc. It is fully documented and should be relatively easy to figure out. You can also have user specific config files by copying /etc/cdmrc to $HOME/.cdmrc.

Menu items

Menu items are configured using three arrays: binlist, namelist and flaglist. Order of items in these arrays is important, items with the same index describe the same menu item. binlist contains commands which are executed, namelist contains names which are shown in the menu and flaglist contains type of the programs specified in binlist, either 'X' for X sessions or 'C' for console programs. Basically X sessions are started using startx (the item in binlist is argument of startx command) and console programs are started using exec.

There is a sample configuration:

binlist=(
  "~/.xsession"                                   # Launch your X session,
  "/bin/bash --login"                           # or just execute your shell,
  "/usr/bin/fbterm"                             # or start a frame buffer console,
  "/usr/bin/cdm ~/.submenu.cdmrc"  # or go to a submenu :)
)
namelist=("X session" Console FBTerm "Sub menu")
flaglist=(X C C C)

Theming

Themes are located in /usr/share/cdm/themes, all you have to do is pass full path of the theme file to dialogrc variable in /etc/cdmrc, for example

dialogrc=/usr/share/cdm/themes/cdm

The theme syntax is fairly self explanatory, the best way to start a new theme would be to duplicate and edit an existing theme.

Starting X

You can affect the process of starting X server in several ways - use of ConsoleKit is optional, you can specify on which tty the X server will be started (specify either number or 'keep' if you want to run X server on current tty), and finally you can specify custom X server arguments.

Custom commands for power operations

If you want to add entries for power operations, like shutdown, reboot etc., you can include them in binlist array.

ConsoleKit method

If you use ConsoleKit for session authentication, see ConsoleKit#Use_dbus_for_power_operations.

systemd method

If you use systemd, see Systemd#Power_Management.

More resources