RT_SIGPROCMASK(2)	   Linux Programmer's Guide	     RT_SIGPROCMASK(2)

NAME
       rt_sigprocmask - Change the list of currently blocked signals

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

DESCRIPTION
       rt_sigprocmask changes the list of currently blocked signals.  The  set
       value  stores  the signal mask of the pending signals. The previous set
       is saved in oset. The value of how indicates how the  call  should  be‐
       have; its values are as follows:

       SIG_BLOCK
	      The  set	of blocked signals is the union of the current set and
	      the set argument.

       SIG_UNBLOCK
	      The signals in set are removed from the current set  of  blocked
	      signals. It is okay to unblock a signal that is not blocked.

       SIG_SETMASK
	      The  set	of blocked signals is set to the set argument. sigset‐
	      size should indicate the size of a sigset_t type.

RETURN VALUE
       rt_sigprocmask returns 0 on success; otherwise, rt_sigprocmask  returns
       one of the errors listed in the "Errors" section.

ERRORS
       -EINVAL
	      sigsetsize  was not equivalent to the size of a sigset_t type or
	      the value specified in how was invalid.

       -EFAULT
	      An invalid set, act, or oset was specified.

SEE ALSO
       rt_sigaction(2), rt_sigpending(2), rt_sigqueueinfo(2), rt_sigreturn(2),
       rt_sigsuspend(2), rt_sigtimedwait(2)

AUTHOR
       Niki Rahimi

Linux 2.6			 2004-March-12		     RT_SIGPROCMASK(2)

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