/** @file

  Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials are licensed and made available under
  the terms and conditions of the BSD License that accompanies this distribution.
  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/
#ifndef _UNISTD_H_
#define _UNISTD_H_

//#include <machine/ansi.h>
//#include <machine/int_types.h>
//#include <sys/featuretest.h>
//#include <sys/types.h>
#include  <sys/unistd.h>
#include  <sys/EfiSysCall.h>

#define F_ULOCK   0
#define F_LOCK    1
#define F_TLOCK   2
#define F_TEST    3

/* access function */
#define F_OK      0     /* test for existence of file */
#define X_OK      0x01  /* test for execute or search permission */
#define W_OK      0x02  /* test for write permission */
#define R_OK      0x04  /* test for read permission */


__BEGIN_DECLS
int             dup(int);
int             rename(const char *, const char *);

/* Functions implemented for compatibility. */
int             getopt(int, char * const [], const char *);
extern   char  *optarg;     /* getopt(3) external variables */
extern   int    optind;
pid_t           getpgrp(void);
pid_t           tcgetpgrp(int);
char           *getpass(const char *);
int             usleep(useconds_t);
unsigned int    sleep(unsigned int);
char           *basename(char *path);

#ifndef GETCWD_DECLARED
  /** Gets the current working directory.

  The getcwd() function shall place an absolute pathname of the current
  working directory in the array pointed to by buf, and return buf. The
  pathname copied to the array shall contain no components that are
  symbolic links. The size argument is the size in bytes of the character
  array pointed to by the buf argument.

  @param[in,out] Buf        The buffer to fill.
  @param[in]     BufSize    The number of bytes in buffer.

  @retval NULL          The function failed.
  @retval NULL          Buf was NULL.
  @retval NULL          Size was 0.
  @return buf           The function completed successfully. See errno for info.
  **/
  char           *getcwd(char *Buf, size_t BufSize);
  #define GETCWD_DECLARED
#endif

#ifndef CHDIR_DECLARED
  /** Change the current working directory.

  The chdir() function shall cause the directory named by the pathname
  pointed to by the path argument to become the current working directory;
  that is, the starting point for path searches for pathnames not beginning
  with '/'.

  @param[in] Path   The new path to set.

  @todo Add non-shell CWD changing.
  **/
  int       chdir(const char *Path);
#define CHDIR_DECLARED
#endif

/** Determine accessibility of a file.
    The access() function checks the file, named by the pathname pointed to by
    the Path argument, for accessibility according to the bit pattern contained
    in Mode.

    The value of Mode is either the bitwise-inclusive OR of the access
    permissions to be checked (R_OK, W_OK, X_OK) or the existence test (F_OK).

    If Path ends in '/' or '\\', the target must be a directory, otherwise it doesn't matter.
    A file is executable if it is NOT a directory and it ends in ".efi".

    @param[in]    Path    Path or name of the file to be checked.
    @param[in]    Mode    Access permissions to check for.

    @retval   0   Successful completion.
    @retval  -1   File is not accessible with the given Mode.  The error condition
                  is indicated by errno.  Values of errno specific to the access
                  function include: EACCES, ENOENT, ENOTDIR, ENAMETOOLONG
**/
int             access(const char *Path, int Mode);
pid_t           getpid(void);

// Networking
long            gethostid(void);
int             gethostname(char *, size_t);
int             getdomainname(char *, size_t);
int             setdomainname(const char *, size_t);
int             sethostid(long);
int             sethostname(const char *, size_t);

/*  Stub functions implemented for porting ease.
    These functions always fail or return NULL.
*/
__aconst char  *getlogin(void);
pid_t           fork(void);
uid_t           getuid(void);

// For Future implementation
ssize_t         pread(int, void *, size_t, off_t);
ssize_t         pwrite(int, const void *, size_t, off_t);
int             syscall(int, ...);

#if 0   // The following functions are not implemented
__dead   void   _exit(int) __attribute__((__noreturn__));
unsigned int    alarm(unsigned int);
int             chown(const char *, uid_t, gid_t);
size_t          confstr(int, char *, size_t);
int             execl(const char *, const char *, ...);
int             execle(const char *, const char *, ...);
int             execlp(const char *, const char *, ...);
int             execv(const char *, char * const *);
int             execve(const char *, char * const *, char * const *);
int             execvp(const char *, char * const *);
long            fpathconf(int, int);
gid_t           getegid(void);
uid_t           geteuid(void);
gid_t           getgid(void);
int             getgroups(int, gid_t []);
pid_t           getppid(void);
int             link(const char *, const char *);
long            pathconf(const char *, int);
int             pause(void);
int             pipe(int *);
int             setgid(gid_t);
int             setpgid(pid_t, pid_t);
pid_t           setsid(void);
int             setuid(uid_t);
long            sysconf(int);

int             tcsetpgrp(int, pid_t);
__aconst char  *ttyname(int);

extern   int    opterr;
extern   int    optopt;
extern   int    optreset;
extern   char  *suboptarg;

int             setegid(gid_t);
int             seteuid(uid_t);
int             fdatasync(int);
int             fsync(int);
int             ttyname_r(int, char *, size_t);
int             chroot(const char *);
int             nice(int);
__aconst char *crypt(const char *, const char *);
int             encrypt(char *, int);
pid_t           getsid(pid_t);

#ifndef intptr_t
typedef __intptr_t  intptr_t;
#define intptr_t  __intptr_t
#endif

int             brk(void *);
int             fchdir(int);
int             fchown(int, uid_t, gid_t);
int             getdtablesize(void);
__pure int      getpagesize(void);    /* legacy */
pid_t           getpgid(pid_t);
int             lchown(const char *, uid_t, gid_t);
int             lockf(int, int, off_t);
ssize_t         readlink(const char * __restrict, char * __restrict, size_t);
void           *sbrk(intptr_t);
int             setregid(gid_t, gid_t);
int             setreuid(uid_t, uid_t);
void            swab(const void *, void *, size_t);
int             symlink(const char *, const char *);
void            sync(void);
useconds_t      ualarm(useconds_t, useconds_t);
pid_t           vfork(void) __RENAME(__vfork14);

/*
 * Implementation-defined extensions
 */
int             acct(const char *);
int             closefrom(int);
int             des_cipher(const char *, char *, long, int);
int             des_setkey(const char *);
void            endusershell(void);
int             exect(const char *, char * const *, char * const *);
int             fchroot(int);
int             fsync_range(int, int, off_t, off_t);
int             getgrouplist(const char *, gid_t, gid_t *, int *);
int             getgroupmembership(const char *, gid_t, gid_t *, int, int *);
mode_t          getmode(const void *, mode_t);
int             getsubopt(char **, char * const *, char **);
__aconst char  *getusershell(void);
int             initgroups(const char *, gid_t);
int             iruserok(uint32_t, int, const char *, const char *);
int             issetugid(void);
int             nfssvc(int, void *);
int             profil(char *, size_t, u_long, u_int);
void            psignal(unsigned int, const char *);
int             rcmd(char **, int, const char *, const char *, const char *, int *);
int             revoke(const char *);
int             rresvport(int *);
int             ruserok(const char *, int, const char *, const char *);
int             setgroups(int, const gid_t *);
int             setlogin(const char *);
void           *setmode(const char *);
int             setrgid(gid_t);
int             setruid(uid_t);
void            setusershell(void);
void            strmode(mode_t, char *);
__aconst char  *strsignal(int);
int             swapctl(int, void *, int);
quad_t          __syscall(quad_t, ...);
int             undelete(const char *);
int             rcmd_af(char **, int, const char *, const char *, const char *, int *, int);
int             rresvport_af(int *, int);
int             iruserok_sa(const void *, int, int, const char *, const char *);
#endif  /* Unimplemented functions. */

__END_DECLS

#endif /* !_UNISTD_H_ */