Abolute path of argv[0]

From: Alvin (replay_at_to_the_newsgroup.thanks)
Date: 11/11/05 

Date: Fri, 11 Nov 2005 14:02:19 GMT

Hello all,

I have a program that launches from the symlink:

   /usr/local/bin/app -> /opt/MyProgram/app

What I would like to do, is have the program, app, determine that its been
launched from a symlink then to change the CWD to /opt/MyProgram.

I'm using stat(2) and the S_IFLNK flag, which works if I run the program
as /usr/local/bin/app

My problem is that /usr/local/bin is in my $PATH. Therefore, if I run the
program "app" from any directory, say $HOME, argv[0] only contains "app"
not /usr/local/bin/app.

Is there a system call that can expand argv[0] to its absolute path?

Thanks,

Alvin

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