Updated: 2022/Sep/29

Please read Privacy Policy. It's for your privacy.

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 10.99                    April 10, 2011                    NetBSD 10.99