umask man page on Ultrix

umask man page on Ultrix

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umask(2)							      umask(2)

Name
       umask - set file creation mask

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

       oumask = umask(numask)
       mode_t oumask, numask;

Description
       The  system  call  sets	the  process's	file mode creation mask to and
       returns the previous value of the mask.	The low-order nine bits of are
       used  whenever  a  file	is created, clearing corresponding bits in the
       file mode.  (For further information, see  This	clearing  allows  each
       user to restrict the default access to his or her files.

       The  value is initially 022 (write access for owner only).  The mask is
       inherited by child processes.

       The previous value of the file mode mask is returned by the call.

Environment
       POSIX
       When your program is compiled in POSIX mode, the numask argument is  of
       type mode_t and the function returns a value of type mode_t.

See Also
       chmod(2), mknod(2), open(2)

								      umask(2)

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