UMASK(2) UMASK(2)
NAME
umask - set file creation mode mask
SYNOPSIS
int umask(complmode)
DESCRIPTION
Umask sets the process mode mask. The mask modifies the
mode argument of creat (see open(2)), mkdir(2), and mknod(2)
thus:
mode &= (07777 & ~(complmode & 0777))
In other words, the mask specifies permission bits to be
turned off when files are created.
The previous value of the mask is returned by the call. The
initial value is set by login(8), and may be modified by the
umask command of sh(1). The mask is inherited by child pro-
cesses.
SEE ALSO
open(2), mkdir(2), mknod(2), stat(2)