Get calling user ID in PHP setuid script

Posted by Bart van Heukelom on Stack Overflow See other posts from Stack Overflow or by Bart van Heukelom
Published on 2010-05-01T16:15:49Z Indexed on 2010/05/01 16:17 UTC
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php

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linux

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setuid

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I have a PHP script on Linux in which the sticky bit is set, so it gets executed as the file owner. How can I get the user id of the calling process, for authorization purposes?

Context: I have two applications on a server, and want one to request some info from the other. For this reason the other offers a script with setuid, but I want to make sure it can only be called by the one.

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