Advanced Programming in the UNIX® Environment, Third Edition

Appendix A. Function Prototypes

This appendix contains the function prototypes for the standard ISO C, POSIX, and UNIX System functions described in the text. Often, we want to see only the arguments to a function (“Which argument is the file pointer for fgets?”) or only the return value (“Does sprintf return a pointer or a count?”). These prototypes also show which headers need to be included to obtain the definitions of any special constants and to obtain the ISO C function prototype to help detect any compile-time errors.

The page number reference for each function prototype appears to the right of the first header file listed for the function. The page number reference gives the page containing the prototype for the function. That page should ...