This is a summary of ANSI and POSIX functions grouped by library. If you want an alphabetical list, please use the master index. Please refer to a manual for a complete list of functions available to you.

- ANSI standard library.
- POSIX library.
- Non Standard functions from CONIO.H
- Non ANSI Standard Unix functions
- User written functions.
- Variable length argument lists.

## ANSI standard library.

The ANSI library is declared in the following header files.

assert.h | ctype.h | errno.h | float.h | limits.h
locale.h | math.h | setjmp.h | signal.h | stdarg.h
stddef.h | stdio.h | stdlib.h | string.h | time.h

## POSIX library

The POSIX library contains the following headers.

cpio.h | dirent.h | fcntl.h | grp.h | pwd.h
sys/stat.h | sys/times.h | sys/types.h | sys/utsname.h | sys/wait.h
tar.h | termios.h | unistd.h | utime.h |

## ANSII Library headers

## assert.h

## ctype.h

## errno.h

## float.h

No functions are declared in stddef.h.

## limits.h

No functions are declared in stddef.h.

## locale.h

## math.h

### Note

For some reason abs is in stdlib.h

## setjmp.h

## signal.h

## stdarg.h

See also vprintf vfprintf and vsprintf which all print the contents of a va_list

## stddef.h

No functions are declared in stddef.h.

## stdio.h

This header defines all the ANSI I/O functions that allow you to read and write to files and devices. Low level (non ANSI) functions are also available.

## stdlib.h

## string.h

## time.h

## POSIX functions start here....

## cpio.h

## dirent.h

## fcntl.h

## grp.h

## pwd.h

## sys/stat.h

## sys/times.h

## sys/types.h

## sys/utsname.h

## sys/wait.h

## tar.h

## termios.h

## unistd.h

It seems that this library contains headers for many functions that originally came with the ANSII standard library but did not have headers. My documentation for this POSIX library is incomplete.

## utime.h

## conio.h

Dos Specific functions in conio.h Not very portable as conio.h is NOT in the ANSI standard library and does not appear on the Sun or Linux machines.

## Non ANSI Standard Unix Functions.

These functions are not in the ANSI standard libraries but are handy all the same.

## Ungrouped functions