Description

The UMASK option specifies the file mode creation mask. It affects the file permission bits of newly created files and directories.

When the file permission mode is not obtained from the source file, newly created files are created with a permission mode of 666, which is read-write permission for the owner, group, and other categories. All directories are created with a permission mode of 777, which is read-write-execute permission for owner, group, and other categories. UDM uses UMASK to turn off selected permission bits by subtracting the value of UMASK from the file mode 666 or directory mode 777.

Note

To set file permissions, the File Permission (mode) attribute is the recommended method.

Usage

Method	Syntax	IBM i	UNIX	Windows	z/OS
Command Line, Short Form	n/a
Command Line, Long Form	-umask number
Environment Variable	UDMUMASK=number
Configuration File Keyword	umask number
STRUDM Parameter	n/a

Values

number can be any number, 001 to 666.

Default is 026.

The default value, 026, results in file permission 640 (666 - 026 = 640), which is:

read-write for the owner
read for the group
none for others

The default value, 026, results in directory permission 751 (777 - 026 = 751), which is:

read-write-execute for the owner
read-execute for the group
execute for others

References

Refer to the UNIX man page umask(1) for complete details.

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