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From: jfh@rpp386.cactus.org (John F. Haugh II)
Newsgroups: comp.unix.wizards
Subject: Re: of course!
Summary: No, not really ...
Message-ID: <17303@rpp386.cactus.org>
Date: 14 Nov 89 13:26:10 GMT
References: <152@norsat.UUCP> <2586@unisoft.UUCP> <15769@bloom-beacon.MIT.EDU> <17264@rpp386.cactus.org> <4526@ski.cs.vu.nl>
Reply-To: jfh@rpp386.cactus.org (John F. Haugh II)
Organization: Lone Star Cafe and BBS Service
Lines: 27

In article <4526@ski.cs.vu.nl> maart@cs.vu.nl (Maarten Litmaath) writes:
>In article <17264@rpp386.cactus.org> jfh@rpp386.cactus.org (John F. Haugh II) writes:
>\We know all of the initial path exists because of the first access()
>\call.
>
>Can you say `race condition'?

Any number of suitably paranoid conditions exist.

>	isadir(char *path)
>	{
>		char dir[PATH_MAX];
>
>		strcpy(dir, path);
>		strcat(dir, "/.");
>
>		return access(dir, 0);
>	}

On the other hand, not all file systems are going to contain `.' and
`..'.  However, all file systems in the UNIX domain do include files
with names like `x' inside of subdirectories ;-)
-- 
John F. Haugh II                        +-Things you didn't want to know:------
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