| <aio.h> |
Asynchronous input and output |
Implemented with some limitations |
| <arpa/inet.h> |
Functions for manipulating numeric IP addresses (part of Berkley sockets) |
Complete |
| <assert.h> |
Verify assumptions |
Complete |
| <complex.h> |
Complex Arithmetic |
Complete |
| <cpio.h> |
Magic numbers for the cpio archive format |
Complete |
| <ctype.h> |
Character types |
Complete |
| <dirent.h> |
Allows the opening and listing of directories |
Complete |
| <dlfcn.h> |
Dynamic linking |
Complete |
| <errno.h> |
Retrieving Error Number |
Complete |
| <fcntl.h> |
File opening, locking and other operations |
Complete |
| <fenv.h> |
Floating-Point Environment (FPE) |
Complete |
| <float.h> |
Floating-point types |
Complete |
| <fnmatch.h> |
Filename matching |
Complete |
| <ftw.h> |
File tree traversal |
Complete |
| <glob.h> |
Pathname "globbing" (pattern-matching) |
Complete |
| <grp.h> |
User group information and control |
Present with missing functions |
| <iconv.h> |
Codeset conversion facility |
Complete |
| <inttypes.h> |
Fixed sized integer types |
Complete |
| <iso646.h> |
Alternative spellings |
Complete |
| <langinfo.h> |
Language information constants – builds on C localization functions |
Complete |
| <libgen.h> |
Pathname manipulation |
Complete |
| <limits.h> |
Implementation-defined constants |
Complete |
| <math.h> |
Mathematical declarations |
Complete |
| <monetary.h> |
String formatting of monetary units |
Not present |
| <mqueue.h> |
Message queue |
Not present |
| <ndbm.h> |
NDBM database operations |
Complete |
| <net/if.h> |
Listing of local network interfaces |
Complete |
| <netdb.h> |
Translating protocol and host names into numeric addresses (part of Berkeley sockets |
Complete |
| <netinet/in.h> |
Defines Internet protocol and address family (part of Berkley sockets) |
Complete |
| <netinet/tcp.h> |
Issue |
Complete |
| <nl_types.h> |
Localization message catalog functions |
Complete |
| <poll.h> |
Asynchronous file descriptor multiplexing |
Present with missing functions |
| <pthread.h> |
Defines an API for creating and manipulating POSIX threads |
Complete |
| <pwd.h> |
Passwd (user information) access and control |
Present with missing functions |
| <regex.h> |
Regular expression matching |
Complete |
| <sched.h> |
Execution scheduling |
Present with missing functions |
| <search.h> |
Search tables |
Complete |
| <semaphore.h> |
POSIX semaphores |
Complete |
| <setjmp.h> |
Stack environment declarations |
Complete |
| <signal.h> |
Signals |
Complete |
| <spawn.h> |
Process spawning |
Not present |
| <stdarg.h> |
Handle Variable Argument List |
Complete |
| <stdbool.h> |
Boolean type and values |
Complete |
| <stddef.h> |
Standard type definitions |
Complete |
| <stdint.h> |
Integer types |
Complete |
| <stdio.h> |
Standard buffered input/output |
Complete |
| <stdlib.h> |
Standard library definitions |
Complete |
| <string.h> |
Several String Operations |
Complete |
| <strings.h> |
Case-insensitive string comparisons |
Complete |
| <stropts.h> |
Stream manipulation, including ioctl |
Not present |
| <sys/ipc.h> |
Inter-process Communication (IPC) |
Complete |
| <sys/mman.h> |
Memory management, including POSIX shared memory and memory mapped files |
Present with missing functions |
| <sys/msg.h> |
POSIX messages queues |
Complete |
| <sys/resource.h> |
Resource usage, priorities, and limiting |
Present with missing functions |
| <sys/select.h> |
Synchronous I/O multiplexing |
Complete |
| <sys/sem.h> |
XSI (SysV style)semaphores |
Complete |
| <sys/shm.h> |
XSI (SysV style) shared memory |
Complete |
| <sys/socket.h> |
Main Berkeley sockets header |
Complete |
| <sys/stat.h> |
File information |
Complete |
| <sys/statvfs.h> |
File System information |
Complete |
| <sys/time.h> |
Time and date functions and structures |
Complete |
| <sys/times.h> |
File access and modification times |
Complete |
| <sys/types.h> |
Various data types used elsewhere |
Complete |
| <sys/uio.h> |
Vectored I/O operations |
Complete |
| <sys/un.h> |
Unix domain sockets |
Complete |
| <sys/utsname.h> |
Operating system information, including uname |
Complete |
| <sys/wait.h> |
Status of terminated child processes |
Present with missing functions |
| <syslog.h> |
System error logging |
Complete |
| <tar.h> |
Magic numbers for the tar archive format |
Complete |
| <termios.h> |
Allows terminal I/O interfaces |
Complete |
| <tgmath.h> |
Type-Generic Macros |
Complete |
| <time.h> |
Type-Generic Macros |
Complete |
| <trace.h> |
Tracing of runtime behavior (DEPRECATED) |
Not present |
| <ulimit.h> |
Resource limiting (DEPRECATED in favor of <sys/resource.h>) |
Present with missing functions |
| <unistd.h> |
Various essential POSIX functions and constants |
Complete |
| <utime.h> |
access and modification times |
Complete |
| <utmpx.h> |
User accounting database functions |
Not present |
| <wchar.h> |
Wide-Character Handling |
Complete |
| <wctype.h> |
Wide-Character Classification and Mapping Utilities |
Complete |
| <wordexp.h> |
Word-expansion like the shell would perform |
Not present |