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umask(2) [bsd man page]

UMASK(2)							System Calls Manual							  UMASK(2)

NAME
umask - set file creation mode mask SYNOPSIS
oumask = umask(numask) int oumask, numask; DESCRIPTION
Umask sets the process's file mode creation mask to numask and returns the previous value of the mask. The low-order 9 bits of numask are used whenever a file is created, clearing corresponding bits in the file mode (see chmod(2)). This clearing allows each user to restrict the default access to his files. The value is initially 022 (write access for owner only). The mask is inherited by child processes. RETURN VALUE
The previous value of the file mode mask is returned by the call. SEE ALSO
chmod(2), mknod(2), open(2) 4th Berkeley Distribution May 9, 1985 UMASK(2)

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umask(2)							System Calls Manual							  umask(2)

NAME
umask - set and get file creation mask SYNOPSIS
DESCRIPTION
sets the process's file mode creation mask to cmask and returns the previous value of the mask. Only the file access permission bits of the masks are used. The bits set in cmask specify which permission bits to turn off in the mode of the created file, and should be specified using the symbolic values defined in stat(5). EXAMPLES
The following creates a file named in the current directory with permissions so that the file can be written only by its owner, and can be read or executed only by the owner or processes with group permission, even though group write permission and all permissions for others are passed in to RETURN VALUE
The previous value of the file mode creation mask is returned. SEE ALSO
mkdir(1), sh(1), mknod(1M), chmod(2), creat(2), mknod(2), open(2). STANDARDS CONFORMANCE
umask(2)
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