getumask (3)

#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 );
    umask(mask);
    return mask;
}

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

This is a vaporware GNU extension.

This function is documented but not implemented yet in glibc, as at version 2.9.

umask(2)

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