ruby_snprintf    2153 include/ruby/ruby.h PRINTF_ARGS(int ruby_snprintf(char *str, size_t n, char const *fmt, ...), 3, 4);
ruby_snprintf       6 include/ruby/subst.h #define snprintf ruby_snprintf
ruby_snprintf    1278 thread_pthread.c 	ruby_snprintf(buff, sizeof(buff)-n, "(%d)", fd);