4.3BSD-Reno/share/man/cat2/sigblock.0

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SIGBLOCK(2)		      1990		      SIGBLOCK(2)



NNAAMMEE
     sigblock - block signals

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<ssiiggnnaall..hh>>

     ssiiggbblloocckk((mmaasskk));;
     iinntt mmaasskk;;

     mmaasskk == ssiiggmmaasskk((ssiiggnnuumm))

DDEESSCCRRIIPPTTIIOONN
     TThhiiss iinntteerrffaaccee iiss mmaaddee oobbssoolleettee bbyy ssiiggpprrooccmmaasskk((22))..

     _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 or SIGSTOP; this res-
     triction is silently imposed by the system.

RREETTUURRNN VVAALLUUEE
     The previous set of masked signals is returned.

SSEEEE AALLSSOO
     kill(2), sigprocmask(2), sigaction(2), sigsetmask(2), sig-
     setops(3)


























Printed 7/27/90               July				1