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I'm coding a small application that connects to the Internet and retrieves information from my server using bsd socket. I looked at where the proxy settings are stored under Linux but i couldn't the file containing this information.

I just want to find that file, so I can read the proxy settings from it and use these settings in my application.

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up vote 5 down vote accepted

They're in the $http_proxy, $https_proxy and $ftp_proxy environment variables. Also, $no_proxy contains a comma-separated list of host patterns for which no proxy is used. For example:

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thanks, does this work on all linux desktops? or just gnome? – killercode Oct 21 '11 at 6:06
It's a de facto *nix standard. – Ignacio Vazquez-Abrams Oct 21 '11 at 6:08
ok, thanks again – killercode Oct 21 '11 at 6:09
@killercode There are applications that have their own settings, especially browsers that have a Javascript interpreter and support PAC files. But the default expectation is that a unix application will support at least these environment variables, and it's reasonable to tell your users to ensure the environment variables are set. – Gilles Oct 21 '11 at 16:17

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