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open(2): Clarify non-POSIX error when opening a symlink with O_NOFOLLOW.
We return [EMLINK] instead of [ELOOP] when trying to open a symlink with O_NOFOLLOW, so that the original case of [ELOOP] can be distinguished. Code like cmp -h and xz takes advantage of this. PR: 214633 Reviewed by: kib, imp MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D8586
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=309026
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@ -28,7 +28,7 @@
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.\" @(#)open.2 8.2 (Berkeley) 11/16/93
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.\" $FreeBSD$
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.\"
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.Dd September 30, 2016
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.Dd November 22, 2016
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.Dt OPEN 2
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.Os
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.Sh NAME
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@ -503,6 +503,22 @@ The
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.Fn openat
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function was introduced in
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.Fx 8.0 .
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.Sh STANDARDS
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These functions are specified by
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.St -p1003.1-2008 .
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.Fx
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sets
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.Va errno
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to
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.Er EMLINK instead of
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.Er ELOOP
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as specified by
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.Tn POSIX
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when
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.Dv O_NOFOLLOW
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is set in flags and the final component of pathname is a symbolic link
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to distinguish it from the case of too many symbolic link traversals
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in one of its non-final components.
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.Sh BUGS
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The Open Group Extended API Set 2 specification requires that the test
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for whether
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