SIGSETOPS(3)              NetBSD Programmer's Manual              SIGSETOPS(3)

NNAAMMEE
     ssiiggeemmppttyysseett, ssiiggffiillllsseett, ssiiggaaddddsseett, ssiiggddeellsseett, ssiiggiissmmeemmbbeerr - manipulate
     signal sets

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

     _i_n_t
     ssiiggeemmppttyysseett(_s_i_g_s_e_t___t _*_s_e_t);

     _i_n_t
     ssiiggffiillllsseett(_s_i_g_s_e_t___t _*_s_e_t);

     _i_n_t
     ssiiggaaddddsseett(_s_i_g_s_e_t___t _*_s_e_t, _i_n_t _s_i_g_n_o);

     _i_n_t
     ssiiggddeellsseett(_s_i_g_s_e_t___t _*_s_e_t, _i_n_t _s_i_g_n_o);

     _i_n_t
     ssiiggiissmmeemmbbeerr(_s_i_g_s_e_t___t _*_s_e_t, _i_n_t _s_i_g_n_o);

DDEESSCCRRIIPPTTIIOONN
     These functions manipulate signal sets stored in a _s_i_g_s_e_t___t. Either
     ssiiggeemmppttyysseett() or ssiiggffiillllsseett() must be called for every object of type
     _s_i_g_s_e_t___t before any other use of the object.  ssiiggeemmppttyysseett() and
     ssiiggffiillllsseett() are provided as macros, but actual functions are available
     if their names are undefined (with #undef _n_a_m_e).

     The ssiiggeemmppttyysseett() function initializes a signal set to be empty.

     The ssiiggffiillllsseett() function initializes a signal set to contain all sig-
     nals.

     The ssiiggaaddddsseett() function adds the specified signal _s_i_g_n_o to the signal
     set.

     The ssiiggddeellsseett() function deletes the specified signal _s_i_g_n_o from the sig-
     nal set.

     The ssiiggiissmmeemmbbeerr() function returns whether a specified signal _s_i_g_n_o is
     contained in the signal set.

     These functions are provided as macros in the include file <signal.h>.
     Actual functions are available if their names are undefined (with #undef
     _n_a_m_e).

RREETTUURRNN VVAALLUUEESS
     The ssiiggiissmmeemmbbeerr() function returns 1 if the signal is a member of the
     set, a 0 otherwise.  The other functions return 0 upon success.  A -1 re-
     turn value indicates an error occurred and the global variable _e_r_r_n_o is
     set to indicated the reason.

EERRRROORRSS
     These functions could fail if one of the following occurs:

     [EINVAL]      _s_i_g_n_o has an invalid value.

SSEEEE AALLSSOO
     kill(2),  sigaction(2),  sigsuspend(2)

SSTTAANNDDAARRDDSS
     These functions conform to IEEE Std1003.1-1990 (``POSIX'').