UMASK(2) System Calls UMASK(2)

NAME

umask - set and get file creation mask

SYNOPSIS

#include <sys/types.h>
#include <sys/stat.h>

mode_t umask(mode_t cmask);

DESCRIPTION

The umask() function sets the process's file mode creation mask to cmask
and returns the previous value of the mask. Only the access permission
bits of cmask and the file mode creation mask are used. The mask is
inherited by child processes. See Intro(2) for more information on masks.

RETURN VALUES

The previous value of the file mode creation mask is returned.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Standard |
+--------------------+-------------------+
|MT-Level | Async-Signal-Safe |
+--------------------+-------------------+

SEE ALSO

mkdir(1), sh(1), Intro(2), chmod(2), creat(2), mknod(2), open(2),
stat.h(3HEAD), attributes(7), standards(7)

December 28, 1996 UMASK(2)