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#include <string.h>
#include <limits.h>     /* PATH_MAX */
#include <sys/stat.h>   /* mkdir(2) */
#include <errno.h>

int mkdir_recursive(const string &path) {
  const size_t len = path.length();
  char _path[PATH_MAX];
  char *p;

  errno = 0;

  /* Copy string so its mutable */
  if (len > sizeof(_path) - 1) {
    errno = ENAMETOOLONG;
    return -1;
  }
  strcpy(_path, path.c_str());

  /* Iterate the string */
  for (p = _path + 1; *p; p++) {
    if (*p == '/') {
      /* Temporarily truncate */
      *p = '\0';

      if (mkdir(_path, S_IRWXU) != 0) {
        if (errno != EEXIST)
          return -1;
      }

      *p = '/';
    }
  }

  if (mkdir(_path, S_IRWXU) != 0) {
    if (errno != EEXIST)
      return -1;
  }

  return 0;
}