mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-07 16:06:09 +00:00
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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// This program determines which OS that this Valgrind installation
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// supports, which depends on what was chosen at configure-time.
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//
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// We return:
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// - 0 if the machine matches the asked-for OS and satisfies a
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// version requirement, if any
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// - 1 if it doesn't match but does match the name of another OS
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// - 2 if it doesn't match the name of any OS
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// - 3 if there was a usage error (it also prints an error message)
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// Nb: When updating this file for a new OS, add the name to
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// 'all_OSes' as well as adding go().
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#define False 0
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#define True 1
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typedef int Bool;
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char* all_OSes[] = {
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"linux",
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"darwin",
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"solaris",
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NULL
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};
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#if defined(VGO_linux)
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static Bool matches_version(char *min_version)
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{
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int a1, a2, a3, g1, g2, g3; // 'a' = actual; 'g' = given
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if (min_version == NULL) return True; // no version specified
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// get actual version number
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FILE *fp = fopen("/proc/sys/kernel/osrelease", "r");
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if (fp == NULL || fscanf(fp, "%d.%d.%d", &a1, &a2, &a3) != 3) return False;
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fclose(fp);
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// parse given version number
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if (sscanf(min_version, "%d.%d.%d", &g1, &g2, &g3) != 3) return False;
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// printf("actual %d %d %d\n", a1, a2,a3);
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// printf("given %d %d %d\n", g1, g2,g3);
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if (a1 > g1) return True;
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if (a1 < g1) return False;
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if (a2 > g2) return True;
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if (a2 < g2) return False;
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if (a3 >= g3) return True;
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return False;
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}
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#endif
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static Bool go(char* OS, char *min_version)
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{
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#if defined(VGO_linux)
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if ( 0 == strcmp( OS, "linux" ) && matches_version( min_version )) return True;
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#elif defined(VGO_darwin)
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if ( 0 == strcmp( OS, "darwin" ) ) return True;
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#elif defined(VGO_solaris)
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if ( 0 == strcmp( OS, "solaris" ) ) return True;
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#else
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# error Unknown OS
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#endif // VGO_*
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return False;
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}
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//---------------------------------------------------------------------------
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// main
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//---------------------------------------------------------------------------
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int main(int argc, char **argv)
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{
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int i;
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if ( argc < 2 ) {
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fprintf( stderr, "usage: os_test <OS-type> [<min-version>]\n" );
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exit(3); // Usage error.
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}
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if (go( argv[1], argv[2] )) {
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return 0; // Matched.
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}
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for (i = 0; NULL != all_OSes[i]; i++) {
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if ( 0 == strcmp( argv[1], all_OSes[i] ) )
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return 1; // Didn't match, but named another OS.
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}
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return 2; // Didn't match any OSes.
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}
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