tests/os_test.c

   1
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 // This program determines which OS that this Valgrind installation
   7 // supports, which depends on what was chosen at configure-time.
   8 //
   9 // We return:
  10 // - 0 if the machine matches the asked-for OS and satisfies a
  11 //     version requirement, if any
  12 // - 1 if it doesn't match but does match the name of another OS
  13 // - 2 if it doesn't match the name of any OS
  14 // - 3 if there was a usage error (it also prints an error message)
  15
  16 // Nb: When updating this file for a new OS, add the name to
  17 // 'all_OSes' as well as adding go().
  18
  19 #define False  0
  20 #define True   1
  21 typedef int    Bool;
  22
  23 char* all_OSes[] = {
  24    "linux",
  25    "darwin",
  26    "solaris",
  27    NULL
  28 };
  29
  30 #if defined(VGO_linux)
  31 static Bool matches_version(char *min_version)
  32 {
  33    int a1, a2, a3, g1, g2, g3;  // 'a' = actual;  'g' = given
  34
  35    if (min_version == NULL)  return True;  // no version specified
  36
  37    // get actual version number
  38    FILE *fp = fopen("/proc/sys/kernel/osrelease", "r");
  39    if (fp == NULL || fscanf(fp, "%d.%d.%d", &a1, &a2, &a3) != 3) return False;
  40    fclose(fp);
  41
  42    // parse given version number
  43    if (sscanf(min_version, "%d.%d.%d", &g1, &g2, &g3) != 3) return False;
  44
  45 //   printf("actual %d %d %d\n", a1, a2,a3);
  46 //   printf("given  %d %d %d\n", g1, g2,g3);
  47
  48    if (a1 > g1) return True;
  49    if (a1 < g1) return False;
  50    if (a2 > g2) return True;
  51    if (a2 < g2) return False;
  52    if (a3 >= g3) return True;
  53
  54    return False;
  55 }
  56 #endif
  57
  58 static Bool go(char* OS, char *min_version)
  59 {
  60 #if defined(VGO_linux)
  61    if ( 0 == strcmp( OS, "linux" ) && matches_version( min_version )) return True;
  62
  63 #elif defined(VGO_darwin)
  64    if ( 0 == strcmp( OS, "darwin" ) ) return True;
  65
  66 #elif defined(VGO_solaris)
  67    if ( 0 == strcmp( OS, "solaris" ) ) return True;
  68
  69 #else
  70 #  error Unknown OS
  71 #endif   // VGO_*
  72
  73    return False;
  74 }
  75
  76 //---------------------------------------------------------------------------
  77 // main
  78 //---------------------------------------------------------------------------
  79 int main(int argc, char **argv)
  80 {
  81    int i;
  82    if ( argc < 2 ) {
  83       fprintf( stderr, "usage: os_test <OS-type> [<min-version>]\n" );
  84       exit(3);             // Usage error.
  85    }
  86    if (go( argv[1], argv[2] )) {
  87       return 0;            // Matched.
  88    }
  89    for (i = 0; NULL != all_OSes[i]; i++) {
  90       if ( 0 == strcmp( argv[1], all_OSes[i] ) )
  91          return 1;         // Didn't match, but named another OS.
  92    }
  93    return 2;               // Didn't match any OSes.
  94 }
  95