int
ucbsiginterrupt(int sig, int flag)
{
struct sigvec sv;
int ret;
if ((ret = ucbsigvec(sig, 0, &sv)) < 0)
return (ret);
if (flag)
sv.sv_flags |= SV_INTERRUPT;
else
sv.sv_flags &= ~SV_INTERRUPT;
return (ucbsigvec(sig, &sv, 0));
}
void (*
ucbsignal(int s, void (*a)()))()
{
struct sigvec osv;
struct sigvec nsv;
static int mask[NSIG];
static int flags[NSIG];
nsv.sv_handler = a;
nsv.sv_mask = mask[s];
nsv.sv_flags = flags[s];
if (ucbsigvec(s, &nsv, &osv) < 0)
return (SIG_ERR);
if (nsv.sv_mask != osv.sv_mask || nsv.sv_flags != osv.sv_flags) {
mask[s] = nsv.sv_mask = osv.sv_mask;
flags[s] = nsv.sv_flags =
osv.sv_flags & ~(SV_RESETHAND|SV_INTERRUPT);
if (ucbsigvec(s, &nsv, (struct sigvec *)0) < 0)
return (SIG_ERR);
}
return (osv.sv_handler);
}
int
sigvec(int sig, struct sigvec *nvec, struct sigvec *ovec)
{
int newsig;
struct sigvec tvec, *tvecp;
void (*oldhand)(int);
if ((int)nvec == -1 || (int)ovec == -1) {
errno = EFAULT;
return (-1);
}
newsig = maptonewsig(sig);
oldhand = handlers[newsig];
if ((tvecp = nvec) != 0) {
tvec = *nvec;
tvecp = &tvec;
/*
* To be compatible with the behavior of SunOS 4.x:
* If the new signal handler is SIG_IGN or SIG_DFL,
* do not change the signal's entry in the handler array.
* This allows a child of vfork(2) to set signal handlers
* to SIG_IGN or SIG_DFL without affecting the parent.
*/
if (tvecp->sv_handler != SIG_DFL &&
tvecp->sv_handler != SIG_IGN) {
handlers[newsig] = tvecp->sv_handler;
tvecp->sv_handler = maphandler;
}
}
if (ucbsigvec(newsig, tvecp, ovec) == -1) {
handlers[newsig] = oldhand;
return (-1);
}
if (ovec && ovec->sv_handler != SIG_DFL && ovec->sv_handler != SIG_IGN)
ovec->sv_handler = oldhand;
return (0);
}
int
_sigvec(int sig, struct sigvec *nvec, struct sigvec *ovec)
{
return (ucbsigvec(sig, nvec, ovec));
}
