Date: Wed, 5 May 2010 22:23:29 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-6@freebsd.org Subject: svn commit: r207686 - stable/6/lib/libc/gen Message-ID: <201005052223.o45MNTAv081524@svn.freebsd.org>
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Author: jilles Date: Wed May 5 22:23:29 2010 New Revision: 207686 URL: http://svn.freebsd.org/changeset/base/207686 Log: MFC r206760: getcwd(3): Clarify that EACCES may or may not be checked. POSIX permits but does not require checking access on the current and parent directories. Because various programs do not like it if getcwd(3) fails, it seems best to avoid checking access as much as possible. There are various reports in GNATS about this (search for getcwd). Our getcwd(3) implementation first queries the kernel for the pathname directly, which does not check any permissions but sometimes fails, and then falls back to reading all parent directories for the names. PR: standards/44425 Modified: stable/6/lib/libc/gen/getcwd.3 Directory Properties: stable/6/lib/libc/ (props changed) Modified: stable/6/lib/libc/gen/getcwd.3 ============================================================================== --- stable/6/lib/libc/gen/getcwd.3 Wed May 5 22:19:52 2010 (r207685) +++ stable/6/lib/libc/gen/getcwd.3 Wed May 5 22:23:29 2010 (r207686) @@ -32,7 +32,7 @@ .\" @(#)getcwd.3 8.2 (Berkeley) 12/11/93 .\" $FreeBSD$ .\" -.Dd November 24, 1997 +.Dd April 17, 2010 .Dt GETCWD 3 .Os .Sh NAME @@ -112,8 +112,6 @@ The function will fail if: .Bl -tag -width Er -.It Bq Er EACCES -Read or search permission was denied for a component of the pathname. .It Bq Er EINVAL The .Fa size @@ -128,6 +126,16 @@ The argument is greater than zero but smaller than the length of the pathname plus 1. .El +.Pp +The +.Fn getcwd +function +may fail if: +.Bl -tag -width Er +.It Bq Er EACCES +Read or search permission was denied for a component of the pathname. +This is only checked in limited cases, depending on implementation details. +.El .Sh SEE ALSO .Xr chdir 2 , .Xr fchdir 2 ,
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