flavor_ptr default_flavor(void)
{
char *fname = getenv("FLAVOR");
flavor_ptr f, flavor;
if (fname) {
if ((flavor = flavor_byname(fname)) == NULL) {
fprintf(stderr,
"FLAVOR=%s: no such flavor -- valid flavors are:\n",
fname);
f = flavors;
while (f->name) {
fprintf(stderr, "\t%s\n", f->name);
f++;
}
exit(1);
}
/* make sure corresponding rtapi lib is also present */
if (check_rtapi_lib(fname))
return flavor;
else
exit(1);
}
if (kernel_is_rtai()) {
f = flavor_byid(RTAPI_RTAI_KERNEL_ID);
if (check_rtapi_lib((char *)f->name))
return f;
}
if (kernel_is_xenomai()) {
/* check for userspace first */
f = flavor_byid(RTAPI_XENOMAI_ID);
if (check_rtapi_lib((char *)f->name))
return f;
/* else look for xenomai_kernel */
f = flavor_byid(RTAPI_XENOMAI_KERNEL_ID);
if (check_rtapi_lib((char *)f->name))
return f;
}
if (kernel_is_rtpreempt()) {
f = flavor_byid(RTAPI_RT_PREEMPT_ID);
if (check_rtapi_lib((char *)f->name))
return f;
}
return flavor_byid(RTAPI_POSIX_ID);
}
// determine if we can run this flavor on the current kernel
static int flavor_and_kernel_compatible(flavor_ptr f)
{
int retval = 1;
if (f->id == RTAPI_POSIX_ID)
return 1; // no prerequisites
if (kernel_is_xenomai()) {
if (f->id == RTAPI_RT_PREEMPT_ID) {
fprintf(stderr,
"MSGD:%d Warning: starting %s RTAPI on a Xenomai kernel\n",
rtapi_instance, f->name);
return 1;
}
if ((f->id != RTAPI_XENOMAI_ID) &&
(f->id != RTAPI_XENOMAI_KERNEL_ID)) {
fprintf(stderr,
"MSGD:%d ERROR: trying to start %s RTAPI on a Xenomai kernel\n",
rtapi_instance, f->name);
return 0;
}
}
if (kernel_is_rtai() &&
(f->id != RTAPI_RTAI_KERNEL_ID)) {
fprintf(stderr, "MSGD:%d ERROR: trying to start %s RTAPI on an RTAI kernel\n",
rtapi_instance, f->name);
return 0;
}
if (kernel_is_rtpreempt() &&
(f->id != RTAPI_RT_PREEMPT_ID)) {
fprintf(stderr, "MSGD:%d ERROR: trying to start %s RTAPI on an RT PREEMPT kernel\n",
rtapi_instance, f->name);
return 0;
}
return retval;
}
