S_MSG
if (arg & ~(S_INPUT|S_HIPRI|S_OUTPUT|S_MSG|S_ERROR|S_HANGUP))
if (arg & S_MSG)
#define ALLSIG (S_INPUT|S_HIPRI|S_OUTPUT|S_MSG|S_ERROR|S_HANGUP|S_RDNORM|\
if (arg & ~(S_INPUT|S_HIPRI|S_MSG|S_HANGUP|S_ERROR|
~(S_INPUT|S_HIPRI|S_MSG|S_HANGUP|S_ERROR|
if (sevent & S_MSG) {
sevent &= ~S_MSG;
if (stp->sd_sigflags & S_MSG)
strsendsig(stp->sd_siglist, S_MSG, band, 0);
if (stp->sd_sigflags & S_MSG)
strsendsig(stp->sd_siglist, S_MSG, (uchar_t)band, 0);