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)
matches_version(char * min_version)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
go(char * OS,char * min_version)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 //---------------------------------------------------------------------------
main(int argc,char ** argv)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