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man pages section 2: System Calls

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Updated: Thursday, June 13, 2019
 
 

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
Committed
MT-Level
Async-Signal-Safe
Standard

See Also

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