UMASK(2) System Calls Manual UMASK(2)
umask - set file creation mode mask
Umask sets a mask used whenever a file is created by creat(2) or
mknod(2): the actual mode (see chmod(2)) of the newly-created file is
the logical and of the given mode and the complement of the argument.
Only the low-order 9 bits of the mask (the protection bits) partici-
pate. In other words, the mask shows the bits to be turned off when
files are created.
The previous value of the mask is returned by the call. The value is
initially 0 (no restrictions). The mask is inherited by child pro-
creat(2), mknod(2), chmod(2)
(umask = 60.)
sys umask; complmode