int
xf86InstallSIGIOHandler(int fd, void (*f)(int, void *), void *closure)
{
struct sigaction sa;
struct sigaction osa;
int i;
int blocked;
for (i = 0; i < MAX_FUNCS; i++)
{
if (!xf86SigIOFuncs[i].f)
{
if (xf86IsPipe (fd))
return 0;
blocked = xf86BlockSIGIO();
if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_ASYNC) == -1) {
#ifdef XFree86Server
xf86Msg(X_WARNING, "fcntl(%d, O_ASYNC): %s\n",
fd, strerror(errno));
#else
fprintf(stderr,"fcntl(%d, O_ASYNC): %s\n",
fd, strerror(errno));
#endif
xf86UnblockSIGIO(blocked);
return 0;
}
if (fcntl(fd, F_SETOWN, getpid()) == -1) {
#ifdef XFree86Server
xf86Msg(X_WARNING, "fcntl(%d, F_SETOWN): %s\n",
fd, strerror(errno));
#else
fprintf(stderr,"fcntl(%d, F_SETOWN): %s\n",
fd, strerror(errno));
#endif
xf86UnblockSIGIO(blocked);
return 0;
}
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGIO);
sa.sa_flags = 0;
sa.sa_handler = xf86SIGIO;
sigaction(SIGIO, &sa, &osa);
xf86SigIOFuncs[i].fd = fd;
xf86SigIOFuncs[i].closure = closure;
xf86SigIOFuncs[i].f = f;
if (i >= xf86SigIOMax)
xf86SigIOMax = i+1;
if (fd >= xf86SigIOMaxFd)
xf86SigIOMaxFd = fd + 1;
FD_SET (fd, &xf86SigIOMask);
xf86UnblockSIGIO(blocked);
return 1;
}
/* Allow overwriting of the closure and callback */
else if (xf86SigIOFuncs[i].fd == fd)
{
xf86SigIOFuncs[i].closure = closure;
xf86SigIOFuncs[i].f = f;
return 1;
}
}
return 0;
}
int
xf86InstallSIGIOHandler(int fd, void (*f) (int, void *), void *closure)
{
struct sigaction sa;
struct sigaction osa;
int i;
int installed = FALSE;
if (!xf86Info.useSIGIO)
return 0;
for (i = 0; i < MAX_FUNCS; i++) {
if (!xf86SigIOFuncs[i].f) {
if (xf86IsPipe(fd))
return 0;
OsBlockSIGIO();
#ifdef O_ASYNC
if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_ASYNC) == -1) {
xf86Msg(X_WARNING, "fcntl(%d, O_ASYNC): %s\n",
fd, strerror(errno));
}
else {
if (fcntl(fd, F_SETOWN, getpid()) == -1) {
xf86Msg(X_WARNING, "fcntl(%d, F_SETOWN): %s\n",
fd, strerror(errno));
}
else {
installed = TRUE;
}
}
#endif
#ifdef I_SETSIG /* System V Streams - used on Solaris for input devices */
if (!installed && isastream(fd)) {
if (ioctl(fd, I_SETSIG, S_INPUT | S_ERROR | S_HANGUP) == -1) {
xf86Msg(X_WARNING, "fcntl(%d, I_SETSIG): %s\n",
fd, strerror(errno));
}
else {
installed = TRUE;
}
}
#endif
if (!installed) {
OsReleaseSIGIO();
return 0;
}
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGIO);
sa.sa_flags = 0;
sa.sa_handler = xf86SIGIO;
sigaction(SIGIO, &sa, &osa);
xf86SigIOFuncs[i].fd = fd;
xf86SigIOFuncs[i].closure = closure;
xf86SigIOFuncs[i].f = f;
if (i >= xf86SigIOMax)
xf86SigIOMax = i + 1;
if (fd >= xf86SigIOMaxFd)
xf86SigIOMaxFd = fd + 1;
FD_SET(fd, &xf86SigIOMask);
OsReleaseSIGIO();
return 1;
}
/* Allow overwriting of the closure and callback */
else if (xf86SigIOFuncs[i].fd == fd) {
xf86SigIOFuncs[i].closure = closure;
xf86SigIOFuncs[i].f = f;
return 1;
}
}
return 0;
}
