SIGBLOCK(2)             COMMAND REFERENCE             SIGBLOCK(2)



NAME
     sigblock - block signals

SYNOPSIS
     omask = sigblock(mask);
     int omask;
     int mask;

DESCRIPTION
     Sigblock causes the signals specified in mask to be added to
     the set of signals currently being blocked from delivery.
     Signal i is blocked if the i-th bit in mask is a 1.  Bits
     are numbered beginning with 1.

     It is not possible to block SIGKILL, SIGSTOP, or SIGCONT;
     this restriction is silently imposed by the system.

RETURN VALUE
     The previous set of masked signals is returned in omask.

CAVEATS
     As noted above, bits are numbered beginning with 1, not 0.

SEE ALSO
     kill(2), sigsetmask(2), sigvec(2).






























Printed 10/17/86                                                1

%%index%%
na:72,60;
sy:132,346;
de:478,496;
rv:974,152;
ca:1126,115;
se:1241,164;
%%index%%000000000105