Date: Sun, 1 Dec 2013 12:24:57 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r258794 - head/lib/libc/sys Message-ID: <201312011224.rB1COvsR026528@svn.freebsd.org>
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Author: jilles Date: Sun Dec 1 12:24:57 2013 New Revision: 258794 URL: http://svnweb.freebsd.org/changeset/base/258794 Log: chmod(2): Document S_ISVTX following SUSv3/SUSv4. S_ISTXT is non-standard. While here, also update fchmodat() standards entry to POSIX.1-2008. Modified: head/lib/libc/sys/chmod.2 Modified: head/lib/libc/sys/chmod.2 ============================================================================== --- head/lib/libc/sys/chmod.2 Sun Dec 1 11:59:37 2013 (r258793) +++ head/lib/libc/sys/chmod.2 Sun Dec 1 12:24:57 2013 (r258794) @@ -28,7 +28,7 @@ .\" @(#)chmod.2 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd April 10, 2008 +.Dd December 1, 2013 .Dt CHMOD 2 .Os .Sh NAME @@ -139,21 +139,24 @@ defined in #define S_ISUID 0004000 /* set user id on execution */ #define S_ISGID 0002000 /* set group id on execution */ -#ifndef __BSD_VISIBLE -#define S_ISTXT 0001000 /* sticky bit */ -#endif +#define S_ISVTX 0001000 /* sticky bit */ .Ed .Pp +The non-standard +.Dv S_ISTXT +is a synonym for +.Dv S_ISVTX . +.Pp The .Fx VM system totally ignores the sticky bit -.Pq Dv ISTXT +.Pq Dv S_ISVTX for executables. On UFS-based file systems (FFS, LFS) the sticky bit may only be set upon directories. .Pp If mode -.Dv ISTXT +.Dv S_ISVTX (the `sticky bit') is set on a directory, an unprivileged user may not delete or rename files of other users in that directory. @@ -296,12 +299,15 @@ The system call is expected to conform to .St -p1003.1-90 , except for the return of -.Er EFTYPE -and the use of -.Dv S_ISTXT . +.Er EFTYPE . +The +.Dv S_ISVTX +bit on directories is expected to conform to +.St -susv3 . The .Fn fchmodat -system call follows The Open Group Extended API Set 2 specification. +system call is expected to conform to +.St -p1003.1-2008 . .Sh HISTORY The .Fn chmod
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