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STDLIB(3) Library Functions Manual STDLIB(3) NAME stdlib - standard library definitions SYNOPSIS #include <stdlib.h> DESCRIPTION The <stdlib.h> header defines the following types and macros: 1. NULL - 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. RAND_MAX - a macro which expands to an integer constant that is the maximum value returned by the rand(3) function; 5. MB_CUR_MAX - 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. EXIT_SUCCESS 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). SEE ALSO stddef(3), types(3), unistd(3) STANDARDS As described here, the <stdlib.h> header conforms to ISO/IEC 9899:1999 ("ISO C99") and IEEE Std 1003.1-2001 ("POSIX.1"). HISTORY In the current form the <stdlib.h> header was introduced in NetBSD 0.8. NetBSD 8.99.34 April 10, 2011 NetBSD 8.99.34