#include "master.hpp"

#include <sys/types.h>
#include <sys/sysctl.h>

namespace factor {
char *vm_saved_path;



/* From SBCL */
const char *vm_executable_path()
{
  char path[PATH_MAX + 1];

  if (getosreldate() >= 600024)
  {
    /* KERN_PROC_PATHNAME is available */
    size_t len = PATH_MAX + 1;
    int mib[4];

    mib[0] = CTL_KERN;
    mib[1] = KERN_PROC;
    mib[2] = KERN_PROC_PATHNAME;
    mib[3] = -1;
    if (sysctl(mib, 4, &path, &len, NULL, 0) != 0)
      return NULL;
  }
  else
  {
    int size;
    size = readlink("/proc/curproc/file", path, sizeof(path) - 1);
    if (size < 0)
      return NULL;
    path[size] = '\0';
  }

  if(strcmp(path, "unknown") == 0)
    return NULL;

  return safe_strdup(path);
}


}