/* open/fcntl.  */
#define O_ACCMODE      0003
#define O_RDONLY         00
#define O_WRONLY         01
#define O_RDWR           02
#ifndef O_CREAT
# define O_CREAT       0100 /* Not fcntl.  */
#endif
#ifndef O_EXCL
# define O_EXCL        0200 /* Not fcntl.  */
#endif
#ifndef O_NOCTTY
# define O_NOCTTY      0400 /* Not fcntl.  */
#endif
#ifndef O_TRUNC
# define O_TRUNC      01000 /* Not fcntl.  */
#endif
#ifndef O_APPEND
# define O_APPEND     02000
#endif
#ifndef O_NONBLOCK
# define O_NONBLOCK   04000
#endif
#ifndef O_NDELAY
# define O_NDELAY   O_NONBLOCK
#endif
#ifndef O_SYNC
# define O_SYNC        04010000
#endif
#define O_FSYNC     O_SYNC
#ifndef O_ASYNC
# define O_ASYNC     020000
#endif

#include <iostream>
#include <cstdlib>
int main(int argc, char** argv)
{
    if (argc < 2)
    {
        std::cout << "You must enter a file flag value" << std::endl;
        return 1;
    }

    bool accmode_flag = false;
    bool rdonly_flag = false;
    bool rdwr_flag = false;
    bool creat_flag = false;
    bool excl_flag = false;
    bool noctty_flag = false;
    bool trunc_flag = false;
    bool append_flag = false;
    bool nonblock_flag = false;
    bool ndelay_flag = false;
    bool sync_flag = false;
    bool fsync_flag = false;
    bool async_flag = false;

    unsigned int flag_val = std::atoi(argv[1]);
    std::cout << "flag val: " << flag_val << std::endl;
    std::cout << "O_ACCMODE: " << ((flag_val & O_ACCMODE) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_RDONLY: " << ((flag_val & O_RDONLY) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_RDWR: " << ((flag_val & O_RDWR) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_CREAT: " << ((flag_val & O_CREAT) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_EXCL: " << ((flag_val & O_EXCL) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_NOCTTY: " << ((flag_val & O_NOCTTY) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_TRUNC: " << ((flag_val & O_TRUNC) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_APPEND: " << ((flag_val & O_APPEND) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_NONBLOCK: " << ((flag_val & O_NONBLOCK) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_NDELAY: " << ((flag_val & O_NDELAY) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_SYNC: " << ((flag_val & O_SYNC) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_FSYNC: " << ((flag_val & O_FSYNC) != 0 ? "true" : "false") << std::endl;
    std::cout << "O_ASYNC: " << ((flag_val & O_ASYNC) != 0 ? "true" : "false") << std::endl;
}