opensolaris man page for umask

umask(2)							   System Calls 							  umask(2)

NAME
       umask - set and get file creation mask

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

       mode_t umask(mode_t cmask);

DESCRIPTION
       The  umask() function sets the  process's file mode creation mask to cmask and returns the previous value of the mask. Only the access per-
       mission bits of cmask and the file mode creation mask are used. The mask is inherited by child processes. See Intro(2) for more information
       on masks.

RETURN VALUES
       The previous value of the file mode creation mask is returned.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+

SEE ALSO
       mkdir(1), sh(1), Intro(2), chmod(2), creat(2), mknod(2), open(2), stat.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    28 Dec 1996 							  umask(2)