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)
matches_version(char * min_version)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
go(char * OS,char * min_version)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 //---------------------------------------------------------------------------
main(int argc,char ** argv)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
96