/usr/lib/klibc/include/fcntl.h is in libklibc-dev 2.0.4-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | /*
* fcntl.h
*/
#ifndef _FCNTL_H
#define _FCNTL_H
#include <klibc/extern.h>
#include <klibc/compiler.h>
#include <klibc/seek.h>
#include <sys/types.h>
#if defined(__mips__) && ! defined(__mips64)
# include <klibc/archfcntl.h>
#endif
#include <linux/fcntl.h>
/* This is ugly, but "struct flock" has actually been defined with
a long off_t, so it's really "struct flock64". It just happens
to work. Gag. Barf.
This happens to work on all 32-bit architectures except MIPS. */
#ifdef F_GETLK64
# undef F_GETLK
# define F_GETLK F_GETLK64
#endif
#ifdef F_SETLK64
# undef F_SETLK
# define F_SETLK F_SETLK64
#endif
#ifdef F_SETLKW64
# undef F_SETLKW
# define F_SETLKW F_SETLKW64
#endif
/* This is defined here as well as in <unistd.h> */
#ifndef _KLIBC_IN_OPEN_C
__extern int open(const char *, int, ...);
__extern int openat(int, const char *, int, ...);
#endif
__extern int creat(const char *, mode_t);
__extern int fcntl(int, int, ...);
#endif /* _FCNTL_H */
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