[unix-history] / usr / src / lib / libc / sys / umask.2

.\" 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) %G%
.\"
.TH UMASK 2 ""
.UC 4
.SH NAME
umask \- set file creation mode mask
.SH SYNOPSIS
.ft B
oumask = umask(numask)
.br
int oumask, numask;
.ft R
.SH DESCRIPTION
.I Umask
sets the process's file mode creation mask to \fInumask\fP
and returns the previous value of the mask.  The low-order
9 bits of \fInumask\fP are used whenever a file is created,
clearing corresponding bits in the file mode
(see
.IR 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
chmod(2), mknod(2), open(2)
Commit	Line	Data
542d81aa KM	1	.\" Copyright (c) 1980 Regents of the University of California.
	2	.\" All rights reserved. The Berkeley software License Agreement
	3	.\" specifies the terms and conditions for redistribution.
	4	.\"
7d4e3376	5	.\" @(#)umask.2 6.1 (Berkeley) %G%
542d81aa	6	.\"
7d4e3376	7	.TH UMASK 2 ""
542d81aa KM	8	.UC 4
	9	.SH NAME
	10	umask \- set file creation mode mask
	11	.SH SYNOPSIS
5a5f5b5e KM	12	.ft B
	13	oumask = umask(numask)
	14	.br
	15	int oumask, numask;
	16	.ft R
542d81aa KM	17	.SH DESCRIPTION
542d81aa KM	18	.I Umask
5a5f5b5e KM	19	sets the process's file mode creation mask to \fInumask\fP
	20	and returns the previous value of the mask. The low-order
	21	9 bits of \fInumask\fP are used whenever a file is created,
	22	clearing corresponding bits in the file mode
	23	(see
	24	.IR chmod (2)).
	25	This clearing allows each user to restrict the default access
	26	to his files.
542d81aa	27	.PP
542d81aa KM	28	The value is initially 022 (write access for owner only).
542d81aa KM	29	The mask is inherited by child processes.
5a5f5b5e KM	30	.SH "RETURN VALUE
5a5f5b5e KM	31	The previous value of the file mode mask is returned by the call.
542d81aa	32	.SH SEE ALSO
5a5f5b5e	33	chmod(2), mknod(2), open(2)