Difference between revisions of "Xdg-open"

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(xdg-open replacements: added 'Configuration file' column)
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[[Category:Desktop environments]]
#REDIRECT [[Default applications]]
xdg-open is a desktop-independent tool for configuring the default applications of a user. Many applications invoke the {{ic|xdg-open}} command internally.
Inside a [[desktop environment]] (e.g. [[GNOME]], [[KDE]], [[Xfce]], etc.), {{ic|xdg-open}} simply passes the arguments to that desktop environment's file-opener application ({{ic|gvfs-open}}, {{ic|kde-open}}, or {{ic|exo-open}}, respectively), which means that the associations are left up to the desktop environment. When no desktop environment is detected (for example when one runs a standalone [[window manager]], e.g. [[Openbox]]), {{ic|xdg-open}} will use its own configuration files.
== Installation ==
xdg-open is part of the {{Pkg|xdg-utils}} package available in the [[official repositories]]. xdg-open is for use inside a desktop session only. It is not recommended to use xdg-open as root.
== Configuration ==
=== The config file ===
{{Merge|Default Applications|Default Applications article describes (or at least should describe) the standard in general, as well as manual method of configuration}}
{{ic|xdg-open}} uses configuration files located at {{ic|$XDG_DATA_HOME/applications/mimeapps.list}} (for a single user; {{ic|$XDG_DATA_HOME}} defaults to {{ic|~/.local/share}}) and {{ic|/usr/share/applications/defaults.list}} (system wide). Its format is as follows:
[Default Applications]
For example:
[Default Applications]
The best way to look up the MIME type is to read the {{ic|MimeTypes}} list in your application's {{ic|.desktop}} file (see [[Desktop Entries]] for details).
Some tools are available to edit the configuration files:
=== xdg-mime ===
* To get mime type of {{ic|photo.jpg}}:
{{hc|$ xdg-mime query filetype photo.jpg|
* To get default {{ic|.desktop}} file starter for {{ic|image/jpeg}} mime type:
{{hc|$ xdg-mime query default image/jpeg|
* To make Thunar the default file-browser, i.e. the default application for opening folders:
$ xdg-mime default Thunar.desktop inode/directory
* To use {{Pkg|xpdf}} as the default PDF viewer:
$ xdg-mime default xpdf.desktop application/pdf
Previous command should create an entry in your local MIME database:
[Default Applications]
==== Setting default browser for xdg-open ====
This can be tricky to find, so to save you some work:
  $ xdg-mime default firefox.desktop x-scheme-handler/http
  $ xdg-mime default firefox.desktop x-scheme-handler/https
== Drop-in replacements and useful tools ==
=== xdg-open replacements ===
{| class="wikitable"
! Name/Package !! Description !! Based on !! Configuration file
| {{AUR|busking-git}} || A simple, regex-based xdg-open replacement. || {{pkg|perl-file-mimeinfo}} || custom
| {{AUR|expro}} || Opens objects in associated applications by matching regular expressions against object name or MIME-type. || {{pkg|file}} (but alternatives can be configured) || custom
| {{AUR|linopen}} || An intelligent and suckless replacement for xdg-open. || {{pkg|file}} || custom
| {{AUR|mimeo}} || Open files by MIME-type or file name using regular expressions. Also requires {{AUR|xdg-utils-mimeo}}. || {{pkg|file}} || standard {{ic|mimeapps.list}} or {{ic|defaults.list}}; custom is optional
| {{AUR|mimi-git}} || A working replacement for xdg-open. || {{pkg|file}} || custom
The {{ic|.mailcap}} file format used by the mutt mail program is way easier to read and write. The {{AUR|run-mailcap}} package from the AUR provides a executable that could be easily symlinked to {{ic|/usr/bin/xdg-open}}, but that parser is unable to handle directories or links. The simplest solution would be to install mimeo from the AUR too and create a {{ic|/usr/bin/xdg-open}} with the following content:
run-mailcap $1 || mimeo $1
Then use the {{ic|defaults.list}} at {{ic|~/.local/share/applications/}} to associate URLs and folders with applications and the {{ic|.mailcap}} file for normal mimetypes.
=== mimetype  ===
mimetype in {{Pkg|perl-file-mimeinfo}} package can display some mimetype-related information about a file.
For example:
$ mimetype file.ext
returns the mimetype of a file,
$ mimetype -d file.extension
returns a description of that mimetype.
=== Environment variables ===
Some environment variables, such as {{ic|BROWSER}}, {{ic|DE}}, and {{ic|DESKTOP_SESSION}}, will change the behaviour of the default xdg-open. See [[Environment Variables]] for more information.
== See also ==
* [[Default Applications]] - Desktop-specific instructions/overview of alternatives to xdg-open
* [[Environment Variables]]

Latest revision as of 14:24, 22 May 2016