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+.\"	$OpenBSD: sticky.8,v 1.11 2023/05/24 15:48:11 op Exp $
+.\"	$NetBSD: sticky.8,v 1.3 1994/11/30 19:36:27 jtc Exp $
+.\"
+.\" Copyright (c) 1980, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)sticky.8	8.1 (Berkeley) 6/5/93
+.\"
+.Dd $Mdocdate: May 24 2023 $
+.Dt STICKY 8
+.Os
+.Sh NAME
+.Nm sticky
+.Nd sticky text and append-only directories
+.Sh DESCRIPTION
+A special file mode, called the
+.Em sticky bit
+.Pq mode Dv S_ISVTX ,
+is used to indicate special treatment for files and directories.
+See
+.Xr chmod 2
+or
+the file
+.Pa /usr/include/sys/stat.h
+for an explanation of file modes.
+.Sh STICKY FILES
+Historically, an executable shareable file which had the sticky bit set
+was not immediately discarded from swap space after execution.
+The kernel hoarded the text segment of the file for future reuse,
+thus avoiding having to reload the program.
+This is no longer true on modern systems;
+the current virtual memory system keeps track of recently used executables,
+making the sticky bit for files redundant.
+The sticky bit can still be set on files, but without any effect.
+.Pp
+Only the superuser can set the sticky bit on a file,
+though the owner of the file may clear the sticky bit.
+.Sh STICKY DIRECTORIES
+A directory with the
+.Sq sticky bit
+set places restrictions on file deletion:
+a file in a sticky directory may only be removed or renamed
+by a user if the user has write permission for the directory and
+the user is the owner of the file, the owner of the directory,
+or the superuser.
+This feature is usefully applied to directories such as
+.Pa /tmp
+which must be publicly writable but
+should deny users the license to arbitrarily
+delete or rename each others' files.
+.Pp
+Any user may create a sticky directory.
+See
+.Xr chmod 1
+for details about modifying file modes.
+.Sh HISTORY
+A
+.Nm
+command appeared in
+.At 32v .
+.Sh BUGS
+Neither
+.Xr open 2
+nor
+.Xr mkdir 2
+will create a file with the sticky bit set.