atexit man page on OpenIndiana

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atexit(3C)		 Standard C Library Functions		    atexit(3C)

NAME
       atexit  -  register  a function to run at process termination or object
       unloading

SYNOPSIS
       #include <stdlib.h>

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

DESCRIPTION
       The atexit() function registers the function pointed to by func	to  be
       called  without	arguments on normal termination of the program or when
       the object defining the function is unloaded.

       Normal termination occurs by either a call to the exit(3C) function  or
       a   return  from	 main().  Object  unloading  occurs  when  a  call  to
       dlclose(3C) results in the object becoming unreferenced.

       The number of functions that may be registered with atexit() is limited
       only  by	 available  memory  (refer  to	the _SC_ATEXIT_MAX argument of
       sysconf(3C)).

       After a successful call to any of the exec(2) functions, any  functions
       previously registered by atexit() are no longer registered.

       On  process  exit,  functions  are called in the reverse order of their
       registration. On	 object	 unloading,  any  functions  belonging	to  an
       unloadable  object  are	called in the reverse order of their registra‐
       tion.

RETURN VALUES
       Upon successful completion, the atexit() function returns 0. Otherwise,
       it returns a non-zero value.

ERRORS
       The atexit() function may fail if:

       ENOMEM	 Insufficient storage space is available.

USAGE
       The  functions  registered  by a call to atexit() must return to ensure
       that all registered functions are called.

       There is no way for an application to  tell  how	 many  functions  have
       already been registered with atexit().

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface Stability	     │Committed			   │
       ├─────────────────────────────┼─────────────────────────────┤
       │MT-Level		     │Safe			   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Standard		     │See standards(5).		   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       exec(2), dlclose(3C), exit(3C), sysconf(3C), attributes(5)

SunOS 5.11			  25 May 2001			    atexit(3C)
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