atexit(3)                                                         atexit(3)




 NAME    [Toc]    [Back]
      atexit - register a function to be called at program termination

 SYNOPSIS    [Toc]    [Back]
      #include <stdlib.h>

      int atexit(void (*func)(void));

 DESCRIPTION    [Toc]    [Back]
      atexit() registers the function func to be called, without arguments,
      at normal program termination.  Functions registered by atexit() are
      called in reverse order of registration.

      An atexit() call during exit processing is always unsuccessful.

      The number of registered functions should not exceed ATEXIT_MAX as
      specified in <limits.h>.

      When necessary, crt0() or dld.sl() (see crt0(3) and dld.sl(5))
      registers one or more functions with atexit() to allow some processing
      at normal program termination.  This registration occurs before any
      other.

 RETURN VALUE    [Toc]    [Back]
      atexit() returns zero if the registration is successful; non-zero if
      unsuccessful.

 SEE ALSO    [Toc]    [Back]
      exit(2), crt0(3), dld.sl(5).

 STANDARDS CONFORMANCE    [Toc]    [Back]
      atexit(): AES, SVID3, XPG4, ANSI C


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