memcheck/tests/freebsd/bug470713.cpp

   1 // roughly based on the code for Firefox class BinaryPath
   2 // https://searchfox.org/mozilla-central/source/xpcom/build/BinaryPath.h#185
   3
   4 #include <iostream>
   5 #include <sys/types.h>
   6 #include <sys/sysctl.h>
   7 #include <limits.h>
   8 #include <string>
   9 #include <memory>
  10 #include <cstring>
  11
  12 using std::cerr;
  13 using std::cout;
  14 using std::string;
  15
  16 int main(int argc, char **argv)
  17 {
  18    int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
  19    size_t len;
  20
  21    if (sysctl(mib, 4, NULL, &len, NULL, 0) != 0) {
  22       cout << "sysctl failed to get path length: " << std::strerror(errno) << '\n';
  23       return -1;
  24    }
  25
  26    std::unique_ptr<char[]> aResult(new char[len]);
  27
  28    if (sysctl(mib, 4, aResult.get(), &len, NULL, 0) != 0)  {
  29       cout << "sysctl failed to get path: " << strerror(errno) << '\n';
  30       return -1;
  31    }
  32
  33    if (string(aResult.get()) == argv[1]) {
  34       cout << "OK\n";
  35    } else {
  36       cout << "Not OK aResult " << aResult.get() << " argv[1] " << argv[1] << '\n';
  37    }
  38
  39    if (sysctl(mib, 4, NULL, NULL, NULL, 0) != -1) {
  40       cout << "OK syscall failed\n";
  41       return -1;
  42    } else {
  43       cout << "sysctl succeeded when it should have failed\n";
  44    }
  45 }
  46