getumask man page

getumask — get file creation mask


#define _GNU_SOURCE             /* See feature_test_macros(7) */
#include <sys/types.h>
#include <sys/stat.h>

mode_t getumask(void);


This function returns the current file creation mask. It is equivalent to

mode_t getumask(void)
    mode_t mask = umask( 0 );
    return mask;

except that it is documented to be thread-safe (that is, shares a lock with the umask(2) library call).

Conforming to

This is a vaporware GNU extension.


This function is documented in the glibc manual, but, as at glibc version 2.24, it is not implemented on Linux. (See umask(2) for a thread-safe method of discovering a process's umask.)

See Also



This page is part of release 4.09 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at

Referenced By


2016-10-08 GNU Linux Programmer's Manual