S_OUTPUT
if (arg & ~(S_INPUT|S_HIPRI|S_OUTPUT|S_MSG|S_ERROR|S_HANGUP))
if (arg & S_OUTPUT)
if (stp->sd_sigflags & S_OUTPUT)
strsendsig(stp->sd_siglist, S_OUTPUT, 0, 0);
*allmsgsigs = S_OUTPUT;
*allmsgsigs = S_OUTPUT;
*allmsgsigs = S_OUTPUT;
*allmsgsigs = S_OUTPUT;
*allmsgsigs = S_INPUT | S_RDNORM | S_OUTPUT;
S_RDBAND | S_BANDURG | S_RDNORM | S_OUTPUT :
S_RDBAND | S_BANDURG | S_RDNORM | S_OUTPUT;
S_RDBAND | S_BANDURG | S_RDNORM | S_OUTPUT :
#define ALLSIG (S_INPUT|S_HIPRI|S_OUTPUT|S_MSG|S_ERROR|S_HANGUP|S_RDNORM|\
if (sevent & S_OUTPUT) {
sevent &= ~S_OUTPUT;
#define S_WRNORM S_OUTPUT