Date: Thu, 25 Jul 2019 17:33:45 +0000 (UTC) From: Brooks Davis <brooks@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r350329 - stable/12/lib/libc/gen Message-ID: <201907251733.x6PHXjr1093045@repo.freebsd.org>
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Author: brooks Date: Thu Jul 25 17:33:44 2019 New Revision: 350329 URL: https://svnweb.freebsd.org/changeset/base/350329 Log: MFC r350116: Document that setmode(3) is not thread safe. In some circumstances, setmode(3) may call umask(2) twice to retrieve the current mode and then restore it. Between calls, the process will have a umask of 0. Reviewed by: markj Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D20982 Modified: stable/12/lib/libc/gen/setmode.3 Directory Properties: stable/12/ (props changed) Modified: stable/12/lib/libc/gen/setmode.3 ============================================================================== --- stable/12/lib/libc/gen/setmode.3 Thu Jul 25 17:30:19 2019 (r350328) +++ stable/12/lib/libc/gen/setmode.3 Thu Jul 25 17:33:44 2019 (r350329) @@ -28,7 +28,7 @@ .\" @(#)setmode.3 8.2 (Berkeley) 4/28/95 .\" $FreeBSD$ .\" -.Dd February 22, 2015 +.Dd July 18, 2019 .Dt SETMODE 3 .Os .Sh NAME @@ -125,3 +125,10 @@ and .Fn setmode functions first appeared in .Bx 4.4 . +.Sh BUGS +The +.Fn setmode +function is not thread safe. +Files created in other threads while +.Fn setmode +is being called may be created with a umask of 0.
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