golden hour

/usr/include/bits

File/Folder	Size	Actions
a.out.h	268 B
byteswap-16.h	1.69 KB
byteswap.h	5.56 KB
cmathcalls.h	4.7 KB
confname.h	23.19 KB
dirent.h	1.69 KB
dlfcn.h	2.47 KB
elfclass.h	426 B
endian.h	176 B
environments.h	3.5 KB
epoll.h	1.11 KB
errno.h	2.11 KB
error.h	2.62 KB
eventfd.h	1.1 KB
fcntl-linux.h	12.55 KB
fcntl.h	2.19 KB
fcntl2.h	5.44 KB
fenv.h	3.94 KB
fenvinline.h	190 B
huge_val.h	1.83 KB
huge_valf.h	1.79 KB
huge_vall.h	1.57 KB
hwcap.h	966 B
in.h	9.01 KB
inf.h	1.03 KB
initspin.h	25 B
inotify.h	1.05 KB
ioctl-types.h	2.41 KB
ioctls.h	4.38 KB
ipc.h	2.01 KB
ipctypes.h	1.14 KB
libc-lock.h	12.54 KB
libio-ldbl.h	1014 B
link.h	4.2 KB
local_lim.h	3.13 KB
locale.h	1.33 KB
math-finite.h	14.24 KB
mathcalls.h	11.3 KB
mathdef.h	2.14 KB
mathinline.h	30.86 KB
mman.h	4.78 KB
monetary-ldbl.h	1.02 KB
mqueue.h	1.22 KB
mqueue2.h	2.11 KB
msq.h	2.47 KB
nan.h	1.54 KB
netdb.h	1.25 KB
param.h	1.4 KB
poll.h	2.04 KB
poll2.h	2.86 KB
posix1_lim.h	4.81 KB
posix2_lim.h	2.82 KB
posix_opt.h	5.65 KB
printf-ldbl.h	986 B
pthreadtypes.h	6.33 KB
resource.h	9.21 KB
sched.h	7.37 KB
select.h	2.08 KB
select2.h	1.4 KB
sem.h	2.53 KB
semaphore.h	1.21 KB
setjmp.h	1.26 KB
setjmp2.h	1.67 KB
shm.h	3.44 KB
sigaction.h	2.79 KB
sigcontext.h	4.08 KB
siginfo.h	9.81 KB
signalfd.h	1.04 KB
signum.h	3.34 KB
sigset.h	4.48 KB
sigstack.h	1.49 KB
sigthread.h	1.64 KB
sockaddr.h	1.5 KB
socket.h	12.6 KB
socket2.h	2.95 KB
socket_type.h	2.16 KB
stab.def	8.82 KB
stat.h	7.46 KB
statfs.h	1.89 KB
statvfs.h	3.34 KB
stdio-ldbl.h	3.11 KB
stdio-lock.h	2.14 KB
stdio.h	5.45 KB
stdio2.h	12.36 KB
stdio_lim.h	1.34 KB
stdlib-float.h	1.12 KB
stdlib-ldbl.h	1.36 KB
stdlib.h	5.53 KB
string.h	56.48 KB
string2.h	46.08 KB
string3.h	4.38 KB
sys_errlist.h	1.19 KB
syscall.h	43.03 KB
sysctl.h	893 B
syslog-ldbl.h	1.17 KB
syslog-path.h	1.03 KB
syslog.h	1.66 KB
termios.h	5.23 KB
time.h	3.35 KB
timerfd.h	1.08 KB
timex.h	4.36 KB
types.h	7.55 KB
typesizes.h	3.15 KB
uio.h	2.42 KB
unistd.h	13.07 KB
ustat.h	1.06 KB
utmp.h	3.87 KB
utmpx.h	3.38 KB
utsname.h	1.19 KB
waitflags.h	1.61 KB
waitstatus.h	3.49 KB
wchar-ldbl.h	2.45 KB
wchar.h	1.11 KB
wchar2.h	20.04 KB
wordsize.h	327 B
xopen_lim.h	3.68 KB

Edit: posix1_lim.h

/* Copyright (C) 1991-2012 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

/*
 *	POSIX Standard: 2.9.2 Minimum Values	Added to <limits.h>
 *
 *	Never include this file directly; use <limits.h> instead.
 */

#ifndef	_BITS_POSIX1_LIM_H
#define	_BITS_POSIX1_LIM_H	1

/* These are the standard-mandated minimum values.  */

/* Minimum number of operations in one list I/O call.  */
#define _POSIX_AIO_LISTIO_MAX	2

/* Minimal number of outstanding asynchronous I/O operations.  */
#define _POSIX_AIO_MAX		1

/* Maximum length of arguments to `execve', including environment.  */
#define	_POSIX_ARG_MAX		4096

/* Maximum simultaneous processes per real user ID.  */
#ifdef __USE_XOPEN2K
# define _POSIX_CHILD_MAX	25
#else
# define _POSIX_CHILD_MAX	6
#endif

/* Minimal number of timer expiration overruns.  */
#define _POSIX_DELAYTIMER_MAX	32

/* Maximum length of a host name (not including the terminating null)
   as returned from the GETHOSTNAME function.  */
#define _POSIX_HOST_NAME_MAX	255

/* Maximum link count of a file.  */
#define	_POSIX_LINK_MAX		8

/* Maximum length of login name.  */
#define	_POSIX_LOGIN_NAME_MAX	9

/* Number of bytes in a terminal canonical input queue.  */
#define	_POSIX_MAX_CANON	255

/* Number of bytes for which space will be
   available in a terminal input queue.  */
#define	_POSIX_MAX_INPUT	255

/* Maximum number of message queues open for a process.  */
#define _POSIX_MQ_OPEN_MAX	8

/* Maximum number of supported message priorities.  */
#define _POSIX_MQ_PRIO_MAX	32

/* Number of bytes in a filename.  */
#define	_POSIX_NAME_MAX		14

/* Number of simultaneous supplementary group IDs per process.  */
#ifdef __USE_XOPEN2K
# define _POSIX_NGROUPS_MAX	8
#else
# define _POSIX_NGROUPS_MAX	0
#endif

/* Number of files one process can have open at once.  */
#ifdef __USE_XOPEN2K
# define _POSIX_OPEN_MAX	20
#else
# define _POSIX_OPEN_MAX	16
#endif

#if !defined __USE_XOPEN2K || defined __USE_GNU
/* Number of descriptors that a process may examine with `pselect' or
   `select'.  */
# define _POSIX_FD_SETSIZE	_POSIX_OPEN_MAX
#endif

/* Number of bytes in a pathname.  */
#define	_POSIX_PATH_MAX		256

/* Number of bytes than can be written atomically to a pipe.  */
#define	_POSIX_PIPE_BUF		512

/* The number of repeated occurrences of a BRE permitted by the
   REGEXEC and REGCOMP functions when using the interval notation.  */
#define _POSIX_RE_DUP_MAX	255

/* Minimal number of realtime signals reserved for the application.  */
#define _POSIX_RTSIG_MAX	8

/* Number of semaphores a process can have.  */
#define _POSIX_SEM_NSEMS_MAX	256

/* Maximal value of a semaphore.  */
#define _POSIX_SEM_VALUE_MAX	32767

/* Number of pending realtime signals.  */
#define _POSIX_SIGQUEUE_MAX	32

/* Largest value of a `ssize_t'.  */
#define	_POSIX_SSIZE_MAX	32767

/* Number of streams a process can have open at once.  */
#define	_POSIX_STREAM_MAX	8

/* The number of bytes in a symbolic link.  */
#define _POSIX_SYMLINK_MAX	255

/* The number of symbolic links that can be traversed in the
   resolution of a pathname in the absence of a loop.  */
#define _POSIX_SYMLOOP_MAX	8

/* Number of timer for a process.  */
#define _POSIX_TIMER_MAX	32

/* Maximum number of characters in a tty name.  */
#define	_POSIX_TTY_NAME_MAX	9

/* Maximum length of a timezone name (element of `tzname').  */
#ifdef __USE_XOPEN2K
# define _POSIX_TZNAME_MAX	6
#else
# define _POSIX_TZNAME_MAX	3
#endif

#if !defined __USE_XOPEN2K || defined __USE_GNU
/* Maximum number of connections that can be queued on a socket.  */
# define _POSIX_QLIMIT		1

/* Maximum number of bytes that can be buffered on a socket for send
   or receive.  */
# define _POSIX_HIWAT		_POSIX_PIPE_BUF

/* Maximum number of elements in an `iovec' array.  */
# define _POSIX_UIO_MAXIOV	16
#endif

/* Maximum clock resolution in nanoseconds.  */
#define _POSIX_CLOCKRES_MIN	20000000

/* Get the implementation-specific values for the above.  */
#include <bits/local_lim.h>

#ifndef	SSIZE_MAX
# define SSIZE_MAX	LONG_MAX
#endif

/* This value is a guaranteed minimum maximum.
   The current maximum can be got from `sysconf'.  */

#ifndef	NGROUPS_MAX
# define NGROUPS_MAX	8
#endif

#endif	/* bits/posix1_lim.h  */