SIGBLOCK(2) UNIX Programmer's Manual SIGBLOCK(2) NNAAMMEE sigblock - block signals SSYYNNOOPPSSIISS ##iinncclluuddee <<ssiiggnnaall..hh>> ssiiggbblloocckk((mmaasskk));; iinntt mmaasskk;; mmaasskk == ssiiggmmaasskk((ssiiggnnuumm)) DDEESSCCRRIIPPTTIIOONN _S_i_g_b_l_o_c_k causes the signals specified in _m_a_s_k to be added to the set of signals currently being blocked from delivery. Signals are blocked if the corresponding bit in _m_a_s_k is a 1; the macro _s_i_g_m_a_s_k is provided to construct the mask for a given _s_i_g_n_u_m. It is not possible to block SIGKILL, SIGSTOP, or SIGCONT; this restriction is silently imposed by the system. RREETTUURRNN VVAALLUUEE The previous set of masked signals is returned. SSEEEE AALLSSOO kill(2), sigvec(2), sigsetmask(2) Printed 7/9/88 May 14, 1986 1