Path: utzoo!yunexus!hydroesm!jtsv16!torsqnt!news-server.csri.toronto.edu!mailrus!ames!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.unix.questions
Subject: Re: mkdir in C
Message-ID: <13013@smoke.BRL.MIL>
Date: 29 May 90 14:12:27 GMT
Article-I.D.: smoke.13013
References: <009375FC.8A3B0AC0@rigel.efd.lth.se>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 12

In article <009375FC.8A3B0AC0@rigel.efd.lth.se> e89hse@rigel.efd.lth.se writes:
> I'd like to know if there is any way for a C-program to create a directory.
>The mkdir(2) call doesn't exist on the machine I'm using. It is possible to
>create a directory with the mknod(2) call, but then you have to have
>effective-user-id 0 (super user). Of course one could set the substitute user
>flag, but isn't there a more elegant way to do it.

The reason mknod() is protected even for making directory inodes is
that you need to also plant the . and .. links, or havoc will ensue.

The simplest solution is to invoke the privileged system utility:
	system("mkdir whatever");