none/tests/freebsd/osrel.c

   1 #include <unistd.h>
   2 #include <sys/types.h>
   3 #include <sys/sysctl.h>
   4 #include <stdio.h>
   5 #include <sys/param.h>
   6
   7 int main(void)
   8 {
   9    u_int32_t osrel;
  10    int name[4];
  11    name[0] = CTL_KERN;
  12    name[1] = KERN_PROC;
  13    name[2] = KERN_PROC_OSREL;
  14    name[3] = getpid();
  15    size_t newlen = sizeof(osrel);
  16    sysctl(name, 4, &osrel, &newlen, NULL, 0U);
  17
  18    // this doesn't change much for each release
  19    u_int32_t shortProcOsrel = osrel/1000;
  20    // this changes with each patch, see https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/versions.html
  21    u_int32_t shortSysparamOsrel = __FreeBSD_version/1000;
  22
  23    if (shortProcOsrel == shortSysparamOsrel)
  24    {
  25        printf("OK osrel values match\n");
  26    }
  27    else
  28    {
  29        printf("FAIL osrel values different (kernel proc %u compiler %u)\n", shortProcOsrel, shortSysparamOsrel);
  30    }
  31 }