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 21typedef int Bool; 22 23char* all_OSes[] = { 24 "linux", 25 "darwin", 26 NULL 27}; 28 29#if defined(VGO_linux) 30static 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 57static 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//--------------------------------------------------------------------------- 75int 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