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atexit (3)
  • atexit (3) ( Solaris man: Библиотечные вызовы )
  • atexit (3) ( FreeBSD man: Библиотечные вызовы )
  • atexit (3) ( Русские man: Библиотечные вызовы )
  • atexit (3) ( Linux man: Библиотечные вызовы )
  • >> atexit (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    atexit - register a function to run at process termination
     
    

    SYNOPSIS

    #include <stdlib.h>

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

    DESCRIPTION

    The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard.

    The atexit() function shall register the function pointed to by func, to be called without arguments at normal program termination. At normal program termination, all functions registered by the atexit() function shall be called, in the reverse order of their registration, except that a function is called after any previously registered functions that had already been called at the time it was registered. Normal termination occurs either by a call to exit() or a return from main().

    At least 32 functions can be registered with atexit().

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

    RETURN VALUE

    Upon successful completion, atexit() shall return 0; otherwise, it shall return a non-zero value.  

    ERRORS

    No errors are defined.

    The following sections are informative.  

    EXAMPLES

    None.  

    APPLICATION USAGE

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

    The application should call sysconf() to obtain the value of {ATEXIT_MAX}, the number of functions that can be registered. There is no way for an application to tell how many functions have already been registered with atexit().  

    RATIONALE

    None.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    exit() , sysconf() , the Base Definitions volume of IEEE Std 1003.1-2001, <stdlib.h>  

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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