Headers

• aio.h - asynchronous input and output
• arpa/inet.h - definitions for internet operations
• assert.h - verify program assertion
• complex.h - complex arithmetic
• cpio.h - cpio archive values
• ctype.h - character types
• devctl.h - device control
• dirent.h - format of directory entries
• dlfcn.h - dynamic linking
• endian.h - system endianness
• errno.h - system error numbers
• fcntl.h - file control options
• fenv.h - floating-point environment
• float.h - floating types
• fmtmsg.h - message display structures
• fnmatch.h - filename-matching types
• ftw.h - file tree traversal
• glob.h - pathname pattern-matching types
• grp.h - group structure
• iconv.h - codeset conversion facility
• inttypes.h - fixed size integer types
• iso646.h - alternative spellings
• langinfo.h - language information constants
• libgen.h - definitions for pattern matching functions
• libintl.h - international messaging
• limits.h - implementation-defined constants
• locale.h - category macros
• math.h - mathematical declarations
• monetary.h - monetary types
• mqueue.h - message queues (REALTIME)
• ndbm.h - definitions for ndbm database operations
• netdb.h - definitions for network database operations
• net/if.h - sockets local interfaces
• netinet/in.h - Internet address family
• netinet/tcp.h - definitions for the Internet Transmission Control Protocol (TCP)
• nl_types.h - data types
• poll.h - definitions for the poll() function
• pthread.h - threads
• pwd.h - password structure
• regex.h - regular expression matching types
• sched.h - execution scheduling
• search.h - search tables
• semaphore.h - semaphores
• setjmp.h - stack environment declarations
• signal.h - signals
• spawn.h - spawn (ADVANCED REALTIME)
• stdalign.h - alignment macros
• stdarg.h - handle variable argument list
• stdatomic.h - atomics
• stdbool.h - boolean type and values
• stddef.h - standard type definitions
• stdint.h - integer types
• stdio.h - standard buffered input/output
• stdlib.h - standard library definitions
• stdnoreturn.h - noreturn macro
• string.h - string operations
• strings.h - string operations
• sys/ipc.h - XSI interprocess communication access structure
• syslog - definitions for system error logging
• sys/mman.h - memory management declarations
• sys/msg.h - XSI message queue structures
• sys/resource.h - definitions for XSI resource operations
• sys/select.h - select types
• sys/sem.h - XSI semaphore facility
• sys/shm.h - XSI shared memory facility
• sys/socket.h - main sockets header
• sys/stat.h - data returned by the stat() function
• sys/statvfs.h - VFS File System information structure
• sys/time.h - time types
• sys/times.h - file access and modification times structure
• sys/types.h - data types
• sys/uio.h - definitions for vector I/O operations
• sys/un.h - definitions for UNIX domain sockets
• sys/utsname.h - system name structure
• sys/wait.h - declarations for waiting
• tar.h - extended tar definitions
• termios.h - define values for termios
• tgmath.h - type-generic macros
• threads.h - ISO C threads
• time.h - time types
• uchar.h - Unicode character handling
• unistd.h - standard symbolic constants and types
• utmpx.h - user accounting database definitions
• wchar.h - wide-character handling
• wctype.h - wide-character classification and mapping utilities
• wordexp.h - word-expansion types