Originální popis anglicky:
umask - set file creation mask
Návod, kniha: Linux Programmer's Manual
#include <sys/types.h>
#include <sys/stat.h>
mode_t umask(mode_t mask);
umask sets the umask to
mask & 0777.
The umask is used by
open(2) to set initial file permissions on a
newly-created file. Specifically, permissions in the umask are turned off from
the
mode argument to
open(2) (so, for example, the common umask
default value of 022 results in new files being created with permissions 0666
& ~022 = 0644 = rw-r--r-- in the usual case where the
mode is
specified as 0666).
This system call always succeeds and the previous value of the mask is returned.
SVr4, SVID, POSIX, X/OPEN, BSD 4.3
creat(2),
open(2)
