text: 
  #ifndef	_SYS__DEFAULT_FCNTL_H_
  #ifdef __cplusplus
  extern "C" {
  #endif
  #define	_SYS__DEFAULT_FCNTL_H_
  #include <_ansi.h>
  #define	_FOPEN		(-1)	/* from sys/file.h, kernel use only */
  #define	_FREAD		0x0001	/* read enabled */
  #define	_FWRITE		0x0002	/* write enabled */
  #define	_FAPPEND	0x0008	/* append (writes guaranteed at the end) */
  #define	_FMARK		0x0010	/* internal; mark during gc() */
  #define	_FDEFER		0x0020	/* internal; defer for next gc pass */
  #define	_FASYNC		0x0040	/* signal pgrp when data ready */
  #define	_FSHLOCK	0x0080	/* BSD flock() shared lock present */
  #define	_FEXLOCK	0x0100	/* BSD flock() exclusive lock present */
  #define	_FCREAT		0x0200	/* open with file create */
  #define	_FTRUNC		0x0400	/* open with truncation */
  #define	_FEXCL		0x0800	/* error on open if file exists */
  #define	_FNBIO		0x1000	/* non blocking I/O (sys5 style) */
  #define	_FSYNC		0x2000	/* do all writes synchronously */
  #define	_FNONBLOCK	0x4000	/* non blocking I/O (POSIX style) */
  #define	_FNDELAY	_FNONBLOCK	/* non blocking I/O (4.2 style) */
  #define	_FNOCTTY	0x8000	/* don't assign a ctty on this open */
  
  #define	O_ACCMODE	(O_RDONLY|O_WRONLY|O_RDWR)
  
  /*
   * Flag values for open(2) and fcntl(2)
   * The kernel adds 1 to the open modes to turn it into some
   * combination of FREAD and FWRITE.
   */
  #define	O_RDONLY	0		/* +1 == FREAD */
  #define	O_WRONLY	1		/* +1 == FWRITE */
  #define	O_RDWR		2		/* +1 == FREAD|FWRITE */
  #define	O_APPEND	_FAPPEND
  #define	O_CREAT		_FCREAT
  #define	O_TRUNC		_FTRUNC
  #define	O_EXCL		_FEXCL
  #define O_SYNC		_FSYNC
  /*	O_NDELAY	_FNDELAY 	set in include/fcntl.h */
  /*	O_NDELAY	_FNBIO 		set in include/fcntl.h */
  #define	O_NONBLOCK	_FNONBLOCK
  #define	O_NOCTTY	_FNOCTTY
  /* For machines which care - */
  #if defined (_WIN32) || defined (__CYGWIN__)
  #define _FBINARY        0x10000
  #define _FTEXT          0x20000
  #define _FNOINHERIT	0x40000
  
  #define O_BINARY	_FBINARY
  #define O_TEXT		_FTEXT
  #define O_NOINHERIT	_FNOINHERIT
  /* O_CLOEXEC is the Linux equivalent to O_NOINHERIT */
  #define O_CLOEXEC	_FNOINHERIT
  
  /* The windows header files define versions with a leading underscore.  */
  #define _O_RDONLY	O_RDONLY
  #define _O_WRONLY	O_WRONLY
  #define _O_RDWR		O_RDWR
  #define _O_APPEND	O_APPEND
  #define _O_CREAT	O_CREAT
  #define _O_TRUNC	O_TRUNC
  #define _O_EXCL		O_EXCL
  #define _O_TEXT		O_TEXT
  #define _O_BINARY	O_BINARY
  #define _O_RAW		O_BINARY
  #define _O_NOINHERIT	O_NOINHERIT
  #endif
  
  #ifndef	_POSIX_SOURCE
  
  /*
   * Flags that work for fcntl(fd, F_SETFL, FXXXX)
   */
  #define	FAPPEND		_FAPPEND
  #define	FSYNC		_FSYNC
  #define	FASYNC		_FASYNC
  #define	FNBIO		_FNBIO
  #define	FNONBIO		_FNONBLOCK	/* XXX fix to be NONBLOCK everywhere */
  #define	FNDELAY		_FNDELAY
  
  /*
   * Flags that are disallowed for fcntl's (FCNTLCANT);
   * used for opens, internal state, or locking.
   */
  #define	FREAD		_FREAD
  #define	FWRITE		_FWRITE
  #define	FMARK		_FMARK
  #define	FDEFER		_FDEFER
  #define	FSHLOCK		_FSHLOCK
  #define	FEXLOCK		_FEXLOCK
  
  /*
   * The rest of the flags, used only for opens
   */
  #define	FOPEN		_FOPEN
  #define	FCREAT		_FCREAT
  #define	FTRUNC		_FTRUNC
  #define	FEXCL		_FEXCL
  #define	FNOCTTY		_FNOCTTY
  
  #endif	/* !_POSIX_SOURCE */
  
  /* XXX close on exec request; must match UF_EXCLOSE in user.h */
  #define	FD_CLOEXEC	1	/* posix */
  
  /* fcntl(2) requests */
  #define	F_DUPFD		0	/* Duplicate fildes */
  #define	F_GETFD		1	/* Get fildes flags (close on exec) */
  #define	F_SETFD		2	/* Set fildes flags (close on exec) */
  #define	F_GETFL		3	/* Get file flags */
  #define	F_SETFL		4	/* Set file flags */
  #ifndef	_POSIX_SOURCE
  #define	F_GETOWN 	5	/* Get owner - for ASYNC */
  #define	F_SETOWN 	6	/* Set owner - for ASYNC */
  #endif	/* !_POSIX_SOURCE */
  #define	F_GETLK  	7	/* Get record-locking information */
  #define	F_SETLK  	8	/* Set or Clear a record-lock (Non-Blocking) */
  #define	F_SETLKW 	9	/* Set or Clear a record-lock (Blocking) */
  #ifndef	_POSIX_SOURCE
  #define	F_RGETLK 	10	/* Test a remote lock to see if it is blocked */
  #define	F_RSETLK 	11	/* Set or unlock a remote lock */
  #define	F_CNVT 		12	/* Convert a fhandle to an open fd */
  #define	F_RSETLKW 	13	/* Set or Clear remote record-lock(Blocking) */
  #endif	/* !_POSIX_SOURCE */
  #ifdef __CYGWIN__
  #define	F_DUPFD_CLOEXEC	14	/* As F_DUPFD, but set close-on-exec flag */
  #endif
  
  /* XXX Emscripten: 3 more not really needed ones */
  #define F_GETLK64 20
  #define F_SETLK64 21
  #define F_SETLKW64 22
  
  
  /* fcntl(2) flags (l_type field of flock structure) */
  #define	F_RDLCK		1	/* read lock */
  #define	F_WRLCK		2	/* write lock */
  #define	F_UNLCK		3	/* remove lock(s) */
  #ifndef	_POSIX_SOURCE
  #define	F_UNLKSYS	4	/* remove remote locks for a given system */
  #endif	/* !_POSIX_SOURCE */
  
  #ifdef __CYGWIN__
  /* Special descriptor value to denote the cwd in calls to openat(2) etc. */
  #define AT_FDCWD -2
  
  /* Flag values for faccessat2) et al. */
  #define AT_EACCESS              1
  #define AT_SYMLINK_NOFOLLOW     2
  #define AT_SYMLINK_FOLLOW       4
  #define AT_REMOVEDIR            8
  #endif
  
  /*#include <sys/stdtypes.h>*/
  
  #ifndef __CYGWIN__
  /* file segment locking set data type - information passed to system by user */
  struct flock {
  	short	l_type;		/* F_RDLCK, F_WRLCK, or F_UNLCK */
  	short	l_whence;	/* flag to choose starting offset */
  	long	l_start;	/* relative offset, in bytes */
  	long	l_len;		/* length, in bytes; 0 means lock to EOF */
  	short	l_pid;		/* returned with F_GETLK */
  	short	l_xxx;		/* reserved for future use */
  };
  #endif /* __CYGWIN__ */
  
  #ifndef	_POSIX_SOURCE
  /* extended file segment locking set data type */
  struct eflock {
  	short	l_type;		/* F_RDLCK, F_WRLCK, or F_UNLCK */
  	short	l_whence;	/* flag to choose starting offset */
  	long	l_start;	/* relative offset, in bytes */
  	long	l_len;		/* length, in bytes; 0 means lock to EOF */
  	short	l_pid;		/* returned with F_GETLK */
  	short	l_xxx;		/* reserved for future use */
  	long	l_rpid;		/* Remote process id wanting this lock */
  	long	l_rsys;		/* Remote system id wanting this lock */
  };
  #endif	/* !_POSIX_SOURCE */
  
  
  #include <sys/types.h>
  #include <sys/stat.h>		/* sigh. for the mode bits for open/creat */
  
  extern int open _PARAMS ((const char *, int, ...));
  extern int open64 _PARAMS ((const char *, int, ...)); /* XXX Emscripten */
  extern int creat _PARAMS ((const char *, mode_t));
  extern int fcntl _PARAMS ((int, int, ...));
  #ifdef __CYGWIN__
  #include <sys/time.h>
  extern int futimesat _PARAMS ((int, const char *, const struct timeval *));
  extern int openat _PARAMS ((int, const char *, int, ...));
  #endif
  
  /* Provide _<systemcall> prototypes for functions provided by some versions
     of newlib.  */
  #ifdef _COMPILING_NEWLIB
  extern int _open _PARAMS ((const char *, int, ...));
  extern int _fcntl _PARAMS ((int, int, ...));
  #ifdef __LARGE64_FILES
  extern int _open64 _PARAMS ((const char *, int, ...));
  #endif
  #endif
  
  /* XXX Emscripten */
  #define POSIX_FADV_DONTNEED 135
  int posix_fadvise(int fd, off_t offset, off_t len, int advice);
  int posix_fallocate(int fd, off_t offset, off_t len);
  
  #ifdef __cplusplus
  }
  #endif
  #endif	/* !_SYS__DEFAULT_FCNTL_H_ */
  