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: resource.h

/* Bit values & structures for resource limits.  Linux version.
   Copyright (C) 1994-2012 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/>.  */

#ifndef _SYS_RESOURCE_H
# error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
#endif

#include <bits/types.h>

/* Transmute defines to enumerations.  The macro re-definitions are
   necessary because some programs want to test for operating system
   features with #ifdef RUSAGE_SELF.  In ISO C the reflexive
   definition is a no-op.  */

/* Kinds of resource limit.  */
enum __rlimit_resource
{
  /* Per-process CPU limit, in seconds.  */
  RLIMIT_CPU = 0,
#define RLIMIT_CPU RLIMIT_CPU

/* Largest file that can be created, in bytes.  */
  RLIMIT_FSIZE = 1,
#define	RLIMIT_FSIZE RLIMIT_FSIZE

/* Maximum size of data segment, in bytes.  */
  RLIMIT_DATA = 2,
#define	RLIMIT_DATA RLIMIT_DATA

/* Maximum size of stack segment, in bytes.  */
  RLIMIT_STACK = 3,
#define	RLIMIT_STACK RLIMIT_STACK

/* Largest core file that can be created, in bytes.  */
  RLIMIT_CORE = 4,
#define	RLIMIT_CORE RLIMIT_CORE

/* Largest resident set size, in bytes.
     This affects swapping; processes that are exceeding their
     resident set size will be more likely to have physical memory
     taken from them.  */
  __RLIMIT_RSS = 5,
#define	RLIMIT_RSS __RLIMIT_RSS

/* Number of open files.  */
  RLIMIT_NOFILE = 7,
  __RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same.  */
#define RLIMIT_NOFILE RLIMIT_NOFILE
#define RLIMIT_OFILE __RLIMIT_OFILE

/* Address space limit.  */
  RLIMIT_AS = 9,
#define RLIMIT_AS RLIMIT_AS

/* Number of processes.  */
  __RLIMIT_NPROC = 6,
#define RLIMIT_NPROC __RLIMIT_NPROC

/* Locked-in-memory address space.  */
  __RLIMIT_MEMLOCK = 8,
#define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK

/* Maximum number of file locks.  */
  __RLIMIT_LOCKS = 10,
#define RLIMIT_LOCKS __RLIMIT_LOCKS

/* Maximum number of pending signals.  */
  __RLIMIT_SIGPENDING = 11,
#define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING

/* Maximum bytes in POSIX message queues.  */
  __RLIMIT_MSGQUEUE = 12,
#define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE

/* Maximum nice priority allowed to raise to.
     Nice levels 19 .. -20 correspond to 0 .. 39
     values of this resource limit.  */
  __RLIMIT_NICE = 13,
#define RLIMIT_NICE __RLIMIT_NICE

/* Maximum realtime priority allowed for non-priviledged
     processes.  */
  __RLIMIT_RTPRIO = 14,
#define RLIMIT_RTPRIO __RLIMIT_RTPRIO

/* Maximum CPU time in µs that a process scheduled under a real-time
     scheduling policy may consume without making a blocking system
     call before being forcibly descheduled.  */
  __RLIMIT_RTTIME = 15,
#define RLIMIT_RTTIME __RLIMIT_RTTIME

__RLIMIT_NLIMITS = 16,
  __RLIM_NLIMITS = __RLIMIT_NLIMITS
#define RLIMIT_NLIMITS __RLIMIT_NLIMITS
#define RLIM_NLIMITS __RLIM_NLIMITS
};

/* Value to indicate that there is no limit.  */
#ifndef __USE_FILE_OFFSET64
# define RLIM_INFINITY ((__rlim_t) -1)
#else
# define RLIM_INFINITY 0xffffffffffffffffuLL
#endif

#ifdef __USE_LARGEFILE64
# define RLIM64_INFINITY 0xffffffffffffffffuLL
#endif

/* We can represent all limits.  */
#define RLIM_SAVED_MAX	RLIM_INFINITY
#define RLIM_SAVED_CUR	RLIM_INFINITY

/* Type for resource quantity measurement.  */
#ifndef __USE_FILE_OFFSET64
typedef __rlim_t rlim_t;
#else
typedef __rlim64_t rlim_t;
#endif
#ifdef __USE_LARGEFILE64
typedef __rlim64_t rlim64_t;
#endif

struct rlimit
  {
    /* The current (soft) limit.  */
    rlim_t rlim_cur;
    /* The hard limit.  */
    rlim_t rlim_max;
  };

#ifdef __USE_LARGEFILE64
struct rlimit64
  {
    /* The current (soft) limit.  */
    rlim64_t rlim_cur;
    /* The hard limit.  */
    rlim64_t rlim_max;
 };
#endif

/* Whose usage statistics do you want?  */
enum __rusage_who
{
  /* The calling process.  */
  RUSAGE_SELF = 0,
#define RUSAGE_SELF RUSAGE_SELF

/* All of its terminated child processes.  */
  RUSAGE_CHILDREN = -1
#define RUSAGE_CHILDREN RUSAGE_CHILDREN

#ifdef __USE_GNU
  ,
  /* The calling thread.  */
  RUSAGE_THREAD = 1
# define RUSAGE_THREAD RUSAGE_THREAD
  /* Name for the same functionality on Solaris.  */
# define RUSAGE_LWP RUSAGE_THREAD
#endif
};

#define __need_timeval
#include <bits/time.h>		/* For `struct timeval'.  */

/* Structure which says how much of each resource has been used.  */

/* The purpose of all the unions is to have the kernel-compatible layout
   while keeping the API type as 'long int', and among machines where
   __syscall_slong_t is not 'long int', this only does the right thing
   for little-endian ones, like x32.  */
struct rusage
  {
    /* Total amount of user time used.  */
    struct timeval ru_utime;
    /* Total amount of system time used.  */
    struct timeval ru_stime;
    /* Maximum resident set size (in kilobytes).  */
    __extension__ union
      {
	long int ru_maxrss;
	__syscall_slong_t __ru_maxrss_word;
      };
    /* Amount of sharing of text segment memory
       with other processes (kilobyte-seconds).  */
    /* Maximum resident set size (in kilobytes).  */
    __extension__ union
      {
	long int ru_ixrss;
	__syscall_slong_t __ru_ixrss_word;
      };
    /* Amount of data segment memory used (kilobyte-seconds).  */
    __extension__ union
      {
	long int ru_idrss;
	__syscall_slong_t __ru_idrss_word;
      };
    /* Amount of stack memory used (kilobyte-seconds).  */
    __extension__ union
      {
	long int ru_isrss;
	 __syscall_slong_t __ru_isrss_word;
      };
    /* Number of soft page faults (i.e. those serviced by reclaiming
       a page from the list of pages awaiting reallocation.  */
    __extension__ union
      {
	long int ru_minflt;
	__syscall_slong_t __ru_minflt_word;
      };
    /* Number of hard page faults (i.e. those that required I/O).  */
    __extension__ union
      {
	long int ru_majflt;
	__syscall_slong_t __ru_majflt_word;
      };
    /* Number of times a process was swapped out of physical memory.  */
    __extension__ union
      {
	long int ru_nswap;
	__syscall_slong_t __ru_nswap_word;
      };
    /* Number of input operations via the file system.  Note: This
       and `ru_oublock' do not include operations with the cache.  */
    __extension__ union
      {
	long int ru_inblock;
	__syscall_slong_t __ru_inblock_word;
      };
    /* Number of output operations via the file system.  */
    __extension__ union
      {
	long int ru_oublock;
	__syscall_slong_t __ru_oublock_word;
      };
    /* Number of IPC messages sent.  */
    __extension__ union
      {
	long int ru_msgsnd;
	__syscall_slong_t __ru_msgsnd_word;
      };
    /* Number of IPC messages received.  */
    __extension__ union
      {
	long int ru_msgrcv;
	__syscall_slong_t __ru_msgrcv_word;
      };
    /* Number of signals delivered.  */
    __extension__ union
      {
	long int ru_nsignals;
	__syscall_slong_t __ru_nsignals_word;
      };
    /* Number of voluntary context switches, i.e. because the process
       gave up the process before it had to (usually to wait for some
       resource to be available).  */
    __extension__ union
      {
	long int ru_nvcsw;
	__syscall_slong_t __ru_nvcsw_word;
      };
    /* Number of involuntary context switches, i.e. a higher priority process
       became runnable or the current process used up its time slice.  */
    __extension__ union
      {
	long int ru_nivcsw;
	__syscall_slong_t __ru_nivcsw_word;
      };
  };

/* Priority limits.  */
#define PRIO_MIN	-20	/* Minimum priority a process can have.  */
#define PRIO_MAX	20	/* Maximum priority a process can have.  */

/* The type of the WHICH argument to `getpriority' and `setpriority',
   indicating what flavor of entity the WHO argument specifies.  */
enum __priority_which
{
  PRIO_PROCESS = 0,		/* WHO is a process ID.  */
#define PRIO_PROCESS PRIO_PROCESS
  PRIO_PGRP = 1,		/* WHO is a process group ID.  */
#define PRIO_PGRP PRIO_PGRP
  PRIO_USER = 2			/* WHO is a user ID.  */
#define PRIO_USER PRIO_USER
};

__BEGIN_DECLS

#ifdef __USE_GNU
/* Modify and return resource limits of a process atomically.  */
# ifndef __USE_FILE_OFFSET64
extern int prlimit (__pid_t __pid, enum __rlimit_resource __resource,
		    const struct rlimit *__new_limit,
		    struct rlimit *__old_limit) __THROW;
# else
#  ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (prlimit, (__pid_t __pid,
				     enum __rlimit_resource __resource,
				     const struct rlimit *__new_limit,
				     struct rlimit *__old_limit), prlimit64);
#  else
#   define prlimit prlimit64
#  endif
# endif
# ifdef __USE_LARGEFILE64
extern int prlimit64 (__pid_t __pid, enum __rlimit_resource __resource,
		      const struct rlimit64 *__new_limit,
		      struct rlimit64 *__old_limit) __THROW;
# endif
#endif

__END_DECLS