4.4BSD/usr/share/man/cat3/atexit.0

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ATEXIT(3)                   BSD Programmer's Manual                  ATEXIT(3)

NNAAMMEE
     aatteexxiitt - register a function to be called on exit

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<ssttddlliibb..hh>>

     _i_n_t
     aatteexxiitt(_v_o_i_d _(_*_f_u_n_c_t_i_o_n_)_(_v_o_i_d_));

DDEESSCCRRIIPPTTIIOONN
     The aatteexxiitt() function registers the given _f_u_n_c_t_i_o_n to be called at pro-
     gram exit, whether via exit(3) or via return from the program's _m_a_i_n.
     Functions so registered are called in reverse order; no arguments are
     passed.  At least 32 functions can always be registered, and more are al-
     lowed as long as sufficient memory can be allocated.

RREETTUURRNN VVAALLUUEESS
     The aatteexxiitt() function returns the value 0 if successful; otherwise the
     value -1 is returned and the global variable _e_r_r_n_o is set to indicate the
     error.

EERRRROORRSS
     [ENOMEM]  No memory was available to add the function to the list.  The
               existing list of functions is unmodified.

SSEEEE AALLSSOO
     exit(3)

SSTTAANNDDAARRDDSS
     The aatteexxiitt() function conforms to ANSI C X3.159-1989 (``ANSI C '').

4.4BSD                           June 4, 1993                                1