39 lines
1010 B
Groff
39 lines
1010 B
Groff
.\" Copyright (c) 1980 Regents of the University of California.
|
|
.\" All rights reserved. The Berkeley software License Agreement
|
|
.\" specifies the terms and conditions for redistribution.
|
|
.\"
|
|
.\" @(#)umask.2 6.1 (Berkeley) 5/9/85
|
|
.\"
|
|
.TH UMASK 2 "May 9, 1985"
|
|
.UC 4
|
|
.SH NAME
|
|
umask \- set file creation mode mask
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.ft B
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
mode_t umask(mode_t \fImask\fP)
|
|
.ft R
|
|
.fi
|
|
.SH DESCRIPTION
|
|
.B Umask
|
|
sets the process's file mode creation mask to \fImask\fP
|
|
and returns the previous value of the mask. The low-order
|
|
9 bits of \fImask\fP are used whenever a file is created,
|
|
clearing corresponding bits in the file mode
|
|
(see
|
|
.BR chmod (2)).
|
|
This clearing allows each user to restrict the default access
|
|
to his files.
|
|
.PP
|
|
The value is initially 022 (write access for owner only).
|
|
The mask is inherited by child processes.
|
|
.SH "RETURN VALUE
|
|
The previous value of the file mode mask is returned by the call.
|
|
.SH SEE ALSO
|
|
.BR chmod (2),
|
|
.BR mknod (2),
|
|
.BR open (2).
|