# Ly - a TUI display manager
![Ly screenshot](https://user-images.githubusercontent.com/5473047/88958888-65efbf80-d2a1-11ea-8ae5-3f263bce9cce.png "Ly screenshot")

Ly is a lightweight TUI (ncurses-like) display manager for Linux and BSD.

## Dependencies
 - a C99 compiler (tested with tcc and gcc)
 - a C standard library
 - GNU make
 - pam
 - xcb
 - xorg
 - xorg-xauth
 - mcookie
 - tput
 - shutdown

On Debian-based distros running `apt install build-essential libpam0g-dev libxcb-xkb-dev` as root should install all the dependencies for you.

## Support
The following desktop environments were tested with success

 - awesome
 - bspwm
 - budgie
 - cinnamon
 - deepin
 - dwm 
 - enlightenment
 - gnome
 - i3
 - kde
 - lxde
 - lxqt
 - mate
 - maxx 
 - pantheon
 - qtile
 - spectrwm
 - sway
 - windowmaker 
 - xfce
 - xmonad

Ly should work with any X desktop environment, and provides
basic wayland support (sway works very well, for example).

## systemd?
Unlike what you may have heard, Ly does not require `systemd`,
and was even specifically designed not to depend on `logind`.
You should be able to make it work easily with a better init,
changing the source code won't be necessary :)

## Cloning and Compiling
Clone the repository
```
$ git clone --recurse-submodules https://github.com/nullgemm/ly
```

Change the directory to ly
```
$ cd ly
```

Compile
```
$ make
```

Test in the configured tty (tty2 by default)
or a terminal emulator (but desktop environments won't start)
```
# make run
```

Install Ly and the provided systemd service file
```
# make install
```

Enable the service
```
# systemctl enable ly.service
```

If you need to switch between ttys after Ly's start you also have to
disable getty on Ly's tty to prevent "login" from spawning on top of it
```
# systemctl disable getty@tty2.service
```

## Arch Linux Installation
From [AUR](https://aur.archlinux.org/packages/ly):
``` 
# yay -S ly
```

## Configuration
You can find all the configuration in `/etc/ly/config.ini`.
The file is commented, and includes the default values. The `fg` and `bg` color settings take a digit 0-8 corresponding to
```
#define TB_DEFAULT 0x00
#define TB_BLACK   0x01
#define TB_RED     0x02
#define TB_GREEN   0x03
#define TB_YELLOW  0x04
#define TB_BLUE    0x05
#define TB_MAGENTA 0x06
#define TB_CYAN    0x07
#define TB_WHITE   0x08
```
Setting both to zero makes `bg` black and `fg` white. To set the actual color palette you are encouraged to use another tool 
such as [mkinitcpio-colors](https://github.com/evanpurkhiser/mkinitcpio-colors). Note that the color palette defined with 
`mkinitcpio-colors` takes 16 colors (0-15), only values 0-8 are valid for `ly` config and these values do not correspond 
exactly. For instance, in defining palettes with `mkinitcpio-colors` the order is black, dark red, dark green, brown, dark 
blue, dark purple, dark cyan, light gray, dark gray, bright red, bright green, yellow, bright blue, bright purple, bright 
cyan, and white, indexed in that order 0 through 15. For example, the color defined for white (indexed at 15 in the mkinitcpio 
config)will be used by `ly` for `fg = 8`.

## Controls
Use the up and down arrow keys to change the current field, and the
left and right arrow keys to change the target desktop environment
while on the desktop field (above the login field).

## .xinitrc
If your .xinitrc doesn't work make sure it is executable and includes a shebang.
This file is supposed to be a shell script! Quoting from xinit's man page:

> If no specific client program is given on the command line, xinit will look for a file in the user's home directory called .xinitrc to run as a shell script to start up client programs.

On Arch Linux, the example .xinitrc (/etc/X11/xinit/xinitrc) starts like this:
```
#!/bin/sh
```

## Tips
The numlock and capslock state is printed in the top-right corner.
Use the F1 and F2 keys to respectively shutdown and reboot.
Take a look at your .xsession if X doesn't start, as it can interfere
(this file is launched with X to configure the display properly).

## PSX DOOM fire animation
To enable the famous PSX DOOM fire described by [Fabien Sanglard](http://fabiensanglard.net/doom_fire_psx/index.html),
just uncomment `animate = true` in `/etc/ly/config.ini`. You may also
disable the main box borders with `hide_borders = true`.

## Additional Information
The name "Ly" is a tribute to the fairy from the game Rayman.
Ly was tested by oxodao, who is some seriously awesome dude.