--- /dev/null
+
+#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
+
+/* 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 */
+
+/* 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 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
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !_SYS__DEFAULT_FCNTL_H_ */
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