NAME    [Toc]    [Back]

       umask - set file creation mask

SYNOPSIS    [Toc]    [Back]

       #include <sys/types.h>
       #include <sys/stat.h>

       mode_t umask(mode_t mask);

DESCRIPTION    [Toc]    [Back]

       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).

RETURN VALUE    [Toc]    [Back]

       This system call always succeeds and the previous value of the mask  is
       returned.

CONFORMING TO    [Toc]    [Back]

       SVr4, SVID, POSIX, X/OPEN, BSD 4.3

SEE ALSO    [Toc]    [Back]

       creat(2), open(2)



Linux				  1998-08-09			      UMASK(2)