.TH UMASK 2.SH NAMEumask \- set file creation mode mask.SH SYNOPSIS.B umask(complmode).SH DESCRIPTION.I Umasksets a mask used whenever a file is created by.IR creat (2)or.IR mknod (2):the actual mode (see.IR chmod (2))of the newly-created file is the logical.B andof the given mode and the complement of the argument.Only the low-order 9 bits of the mask (the protection bits)participate.In other words, the mask shows the bits to be turned offwhen files are created..PPThe previous value of the mask is returned by the call.The value is initially 0 (no restrictions).The mask is inherited by child processes..SH SEE ALSOcreat(2), mknod(2), chmod(2).SH ASSEMBLER(umask = 60.).br.B sys umask; complmode