freebsd3.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/sysctl.h>

int main(void) {
  u_int val[3] = {0};
  char buf[256] = {""};
  size_t len = sizeof(val);
  size_t len2 = sizeof(buf);
  if (0 != (sysctlbyname("dev.cpu.0.temperature", &val, &len, NULL, 0))) {
    if (0 != (sysctlbyname("dev.aibs.0.%desc", buf, &len2, NULL, 0))) {
      puts("failed!");
      return EXIT_FAILURE;
    }
  }
  if (0 != (strcmp(buf, "")))
    printf("%s\n", buf);
  else
    printf("%lu\n", (unsigned long)val[0]);

  return EXIT_SUCCESS;
}