+++ /dev/null
-.\" Copyright (c) 2006, 2008, Michael Kerrisk (mtk.manpages@gmail.com)
-.\" (A few fragments remain from an earlier (1992) version written in
-.\" 1992 by Drew Eckhardt <drew@cs.colorado.edu>.)
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.\" Modified by Michael Haardt <michael@moria.de>
-.\" Modified Sat Jul 24 12:51:53 1993 by Rik Faith <faith@cs.unc.edu>
-.\" Modified Tue Oct 22 22:39:04 1996 by Eric S. Raymond <esr@thyrsus.com>
-.\" Modified Thu May 1 06:05:54 UTC 1997 by Nicolás Lichtmaier
-.\" <nick@debian.com> with Lars Wirzenius <liw@iki.fi> suggestion
-.\" 2006-05-13, mtk, substantial rewrite of description of 'mask'
-.\" 2008-01-09, mtk, a few rewrites and additions.
-.TH UMASK 2 2008-01-09 "Linux" "Linux Programmer's Manual"
-.SH NAME
-umask \- set file mode creation mask
-.SH SYNOPSIS
-.B #include <sys/types.h>
-.br
-.B #include <sys/stat.h>
-.sp
-.BI "mode_t umask(mode_t " mask );
-.SH DESCRIPTION
-.BR umask ()
-sets the calling process's file mode creation mask (umask) to
-.I mask
-& 0777 (i.e., only the file permission bits of
-.I mask
-are used), and returns the previous value of the mask.
-
-The umask is used by
-.BR open (2),
-.BR mkdir (2),
-and other system calls that create files
-.\" e.g., mkfifo(), creat(), mknod(), sem_open(), mq_open(), shm_open()
-.\" but NOT the System V IPC *get() calls
-to modify the permissions placed on newly created files or directories.
-Specifically, permissions in the umask are turned off from
-the
-.I mode
-argument to
-.BR open (2)
-and
-.BR mkdir (2).
-
-The constants that should be used to specify
-.I mask
-are described under
-.BR stat (2).
-
-The typical default value for the process umask is
-.I S_IWGRP\ |\ S_IWOTH
-(octal 022).
-In the usual case where the
-.I mode
-argument to
-.BR open (2)
-is specified as:
-.nf
-
- S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
-
-.fi
-(octal 0666) when creating a new file, the permissions on the
-resulting file will be:
-.nf
-
- S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
-
-.fi
-(because 0666 & ~022 = 0644; i.e., rw\-r\-\-r\-\-).
-.SH RETURN VALUE
-This system call always succeeds and the previous value of the mask
-is returned.
-.SH CONFORMING TO
-SVr4, 4.3BSD, POSIX.1-2001.
-.SH NOTES
-A child process created via
-.BR fork (2)
-inherits its parent's umask.
-The umask is left unchanged by
-.BR execve (2).
-
-The umask setting also affects the permissions assigned to POSIX IPC objects
-.RB ( mq_open (3),
-.BR sem_open (3),
-.BR shm_open (3)),
-FIFOs
-.RB ( mkfifo (3)),
-and UNIX domain sockets
-.RB ( unix (7))
-created by the process.
-The umask does not affect the permissions assigned
-to System\ V IPC objects created by the process (using
-.BR msgget (2),
-.BR semget (2),
-.BR shmget (2)).
-.SH SEE ALSO
-.BR chmod (2),
-.BR mkdir (2),
-.BR open (2),
-.BR stat (2),
-.BR acl (5)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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