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STDLIB(3) Library Functions Manual STDLIB(3)

stdlib
standard library definitions

#include <stdlib.h>

The <stdlib.h> header defines the following types and macros:
  1. - an implementation-defined null pointer constant;
  2. size_t and wchar_t - integer types described in stddef(3);
  3. div_t, ldiv_t, and lldiv_t - structures that are returned by the div(3), ldiv(3), and lldiv(3) functions, respectively;
  4. - a macro which expands to an integer constant that is the maximum value returned by the rand(3) function;
  5. - an integer expression of type size_t whose value is the maximum number of bytes in a character specified by the current locale; and
  6. and EXIT_FAILURE - macros which expand to integer constants suitable for use as an argument to the exit(3) function.

The <stdlib.h> header also prototypes several important functions such as abort(3), atoi(3), bsearch(3), free(3), malloc(3), and strtol(3).

stddef(3), types(3), unistd(3)

As described here, the <stdlib.h> header conforms to ISO/IEC 9899:1999 (“ISO C99”) and IEEE Std 1003.1-2001 (“POSIX.1”).

In the current form the <stdlib.h> header was introduced in NetBSD 0.8.
April 10, 2011 NetBSD-7.0.1