Use pthread_attr_getscope(3C) to retrieve the thread scope.
int pthread_attr_getscope(pthread_attr_t *restrict tattr, int *restrict scope);
#include <pthread.h> pthread_attr_t tattr; int scope; int ret; /* get scope of thread */ ret = pthread_attr_getscope(&tattr, &scope);
pthread_attr_getscope() returns zero after completing successfully. Any other return value indicates that an error occurred. If the following condition occurs, the function fails and returns the corresponding value.
EINVAL
Description:The value of scope is NULL or tattr is invalid.