06-01-2012
Thanks for the reply. still I find it difficult to understand. do you have any standard steps or formula to derive it?
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LEARN ABOUT OPENSOLARIS
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)