sys_rt_sigprocmask(9) centos man page | unix.com

SYS_RT_SIGPROCMASK(9)						   Driver Basics					     SYS_RT_SIGPROCMASK(9)

NAME
       sys_rt_sigprocmask - change the list of currently blocked signals

SYNOPSIS
       long sys_rt_sigprocmask(int how, sigset_t __user * nset, sigset_t __user * oset, size_t sigsetsize);

ARGUMENTS
       how
	   whether to add, remove, or set signals

       nset
	   stores pending signals

       oset
	   previous value of signal mask if non-null

       sigsetsize
	   size of sigset_t type

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						     SYS_RT_SIGPROCMASK(9)