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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 ac- tion on the signal is saved in oact. The value of how indicates how the call should behave; 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 oact 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)