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 NULL 27 }; 28 29 #if defined(VGO_linux) 30 static Bool matches_version(char *min_version) 31 { 32 int a1, a2, a3, g1, g2, g3; // 'a' = actual; 'g' = given 33 34 if (min_version == NULL) return True; // no version specified 35 36 // get actual version number 37 FILE *fp = fopen("/proc/sys/kernel/osrelease", "r"); 38 if (fp == NULL || fscanf(fp, "%d.%d.%d", &a1, &a2, &a3) != 3) return False; 39 fclose(fp); 40 41 // parse given version number 42 if (sscanf(min_version, "%d.%d.%d", &g1, &g2, &g3) != 3) return False; 43 44 // printf("actual %d %d %d\n", a1, a2,a3); 45 // printf("given %d %d %d\n", g1, g2,g3); 46 47 if (a1 > g1) return True; 48 if (a1 < g1) return False; 49 if (a2 > g2) return True; 50 if (a2 < g2) return False; 51 if (a3 >= g3) return True; 52 53 return False; 54 } 55 #endif 56 57 static Bool go(char* OS, char *min_version) 58 { 59 #if defined(VGO_linux) 60 if ( 0 == strcmp( OS, "linux" ) && matches_version( min_version )) return True; 61 62 #elif defined(VGO_darwin) 63 if ( 0 == strcmp( OS, "darwin" ) ) return True; 64 65 #else 66 # error Unknown OS 67 #endif // VGO_* 68 69 return False; 70 } 71 72 //--------------------------------------------------------------------------- 73 // main 74 //--------------------------------------------------------------------------- 75 int main(int argc, char **argv) 76 { 77 int i; 78 if ( argc < 2 ) { 79 fprintf( stderr, "usage: os_test <OS-type> [<min-version>]\n" ); 80 exit(3); // Usage error. 81 } 82 if (go( argv[1], argv[2] )) { 83 return 0; // Matched. 84 } 85 for (i = 0; NULL != all_OSes[i]; i++) { 86 if ( 0 == strcmp( argv[1], all_OSes[i] ) ) 87 return 1; // Didn't match, but named another OS. 88 } 89 return 2; // Didn't match any OSes. 90 } 91 92