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    "freebsd",
  28    NULL
  29 };
  30
  31 #if defined(VGO_linux)
  32 static Bool matches_version(char *min_version)
  33 {
  34    int a1, a2, a3, g1, g2, g3;  // 'a' = actual;  'g' = given
  35
  36    if (min_version == NULL)  return True;  // no version specified
  37
  38    // get actual version number
  39    FILE *fp = fopen("/proc/sys/kernel/osrelease", "r");
  40    if (fp == NULL || fscanf(fp, "%d.%d.%d", &a1, &a2, &a3) != 3) return False;
  41    fclose(fp);
  42
  43    // parse given version number
  44    if (sscanf(min_version, "%d.%d.%d", &g1, &g2, &g3) != 3) return False;
  45
  46 //   printf("actual %d %d %d\n", a1, a2,a3);
  47 //   printf("given  %d %d %d\n", g1, g2,g3);
  48
  49    if (a1 > g1) return True;
  50    if (a1 < g1) return False;
  51    if (a2 > g2) return True;
  52    if (a2 < g2) return False;
  53    if (a3 >= g3) return True;
  54
  55    return False;
  56 }
  57 #endif
  58
  59 static Bool go(char* OS, char *min_version)
  60 {
  61 #if defined(VGO_linux)
  62    if ( 0 == strcmp( OS, "linux" ) && matches_version( min_version )) return True;
  63
  64 #elif defined(VGO_darwin)
  65    if ( 0 == strcmp( OS, "darwin" ) ) return True;
  66
  67 #elif defined(VGO_solaris)
  68    if ( 0 == strcmp( OS, "solaris" ) ) return True;
  69
  70 #elif defined(VGO_freebsd)
  71    if ( 0 == strcmp( OS, "freebsd" ) ) return True;
  72
  73 #else
  74 #  error Unknown OS
  75 #endif   // VGO_*
  76
  77    return False;
  78 }
  79
  80 //---------------------------------------------------------------------------
  81 // main
  82 //---------------------------------------------------------------------------
  83 int main(int argc, char **argv)
  84 {
  85    int i;
  86    if ( argc < 2 ) {
  87       fprintf( stderr, "usage: os_test <OS-type> [<min-version>]\n" );
  88       exit(3);             // Usage error.
  89    }
  90    if (go( argv[1], argv[2] )) {
  91       return 0;            // Matched.
  92    }
  93    for (i = 0; NULL != all_OSes[i]; i++) {
  94       if ( 0 == strcmp( argv[1], all_OSes[i] ) )
  95          return 1;         // Didn't match, but named another OS.
  96    }
  97    return 2;               // Didn't match any OSes.
  98 }
  99