---
name: "getumask"
section: "3"
platform: "linux"
package: "manpages-dev"
version: "5.10-1"
release: "Debian 11 (Bullseye)"
platforms: ["linux"]
url: "https://new.carta.tech/getumask"
---

# getumask(3)

get file creation mask

## NAME

getumask - get file creation mask

## SYNOPSIS

**#define \_GNU\_SOURCE**             /\* See [feature\_test\_macros(7)](/feature_test_macros/7.md) \*/\
 **#include \<sys/types.h\>**\
 **#include \<sys/stat.h\>**

**mode\_t getumask(void);**

## DESCRIPTION

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

```
mode_t getumask(void)
{
    mode_t mask = umask( 0 );
    umask(mask);
    return mask;
}
```

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

## CONFORMING TO

This is a vaporware GNU extension.

## NOTES

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

## SEE ALSO

[**umask**(2)](/umask/2.md)

## COLOPHON

This page is part of release 5.10 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 https://www.kernel.org/doc/man-pages/.