#include <limits.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include "dietfeatures.h"

char* realpath(const char *path, char *resolved_path) {
  int fd=open(".",O_RDONLY);
  char* tmp=(char*)"";
  if (fd<0) return 0;
  if (chdir(path)) {
    if (errno==ENOTDIR) {
      char* match;
      if ((match=strrchr(path,'/'))) {
	tmp=match;
	memmove(resolved_path,path,tmp-path);
	resolved_path[tmp-path]=0;
	if (chdir(resolved_path)) { resolved_path=0; goto abort; }
      }
    } else {
      resolved_path=0; goto abort;
    }
  }
  if (!getcwd(resolved_path,PATH_MAX)) { resolved_path=0; goto abort; }
  strcat(resolved_path,tmp);
abort:
  fchdir(fd);
  close(fd);
  return resolved_path;
}
