headers

Header	Standards			Implementations		Description
Header	ANSI C	POSIX.1	XPG3	SVR4	4.3+BSD	Description
<assert.h>	x	-	-	x	x	verify program assertion
<cpio.h>	-	x	-	x	-	cpio archive values
<ctype.h>	x	-	-	x	x	character types
<dirent.h>	-	x	x	x	x	directory entries
<errno.h>	x	-	-	x	x	error codes
<fcntl.h>	-	x	x	x	x	file control
<float.h>	x	-	-	x	x	floating point constants
<ftw.h>	-	-	x	x	-	file tree walking
<grp.h>	-	x	x	x	x	group file
<langinfo.h>	-	-	x	x	-	language information constants
<limits.h>	x	-	-	x	x	implementation constants
<locale.h>	x	-	-	x	x	locale categories
<math.h>	x	-	-	x	x	mathematical constants
<nl_types.h>	-	-	x	x	-	message catalogs
<pwd.h>	-	x	x	x	x	password file
<regex.h>	-	-	x	x	x	regular expressions
<search.h>	-	-	x	x	-	search tables
<setjmp.h>	x	-	-	x	x	nonlocal goto
<signal.h>	x	-	-	x	x	signals
<stdarg.h>	x	-	-	x	x	variable argument lists
<stddef.h>	x	-	-	x	x	standard definition
<stdio.h>	x	-	-	x	x	standard I/O library
<stdlib.h>	x	-	-	x	x	utility functions
<string.h>	x	-	-	x	x	string operations
<tar.h>	-	-	x	x	-	tar archive values
<termios.h>	-	x	x	x	x	terminal I/O
<time.h>	x	-	-	x	x	time and date
<ulimit.h>	-	-	x	x	-	user limits
<unistd.h>	-	x	x	x	x	symbolic constants
<utime.h>	-	x	x	x	x	file times
<sys/ipc.h>	-	-	x	x	x	IPC
<sys/msg.h>	-	-	x	x	-	message queues
<sys/sem.h>	-	-	x	x	-	semaphores
<sys/shm.h>	-	-	x	x	x	shared memory
<sys/stat.h>	-	x	x	x	x	file status
<sys/times.h>	-	x	x	x	x	process times
<sys/types.h>	-	x	x	x	x	primitive system data types
<sys/utsname.h>	-	x	x	x	x	system name
<sys/wait.h>	-	x	x	x	x	process control