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1 | .\" Copyright (c) 1990 The Regents of the University of California. |
| 2 | .\" All rights reserved. | |
| 3 | .\" | |
| 4 | .\" This code is derived from software contributed to Berkeley by | |
| 5 | .\" Chris Torek. | |
| 6 | .\" | |
| 7 | .\" %sccs.include.redist.man% | |
| 8 | .\" | |
| 9 | .\" @(#)atexit.3 5.1 (Berkeley) %G% | |
| 10 | .\" | |
| 11 | .TH ATEXIT 3 "" | |
| 12 | .UC 7 | |
| 13 | .SH NAME | |
| 14 | atexit \- register a function to be called on exit | |
| 15 | .SH SYNOPSIS | |
| 16 | .B #include <stdlib.h> | |
| 17 | .PP | |
| 18 | .B "atexit(void (*function)()) | |
| 19 | .SH DESCRIPTION | |
| 20 | .B Atexit | |
| 21 | registers the given | |
| 22 | .I function | |
| 23 | to be called at program exit, whether via | |
| 24 | .IR exit (3) | |
| 25 | or via return from the program's | |
| 26 | .BR main . | |
| 27 | Functions so registered are called in reverse order; | |
| 28 | no arguments are passed. | |
| 29 | At least 32 functions can always be registered, | |
| 30 | and more are allowed as long as sufficient memory can be allocated. | |
| 31 | .SH RETURN VALUE | |
| 32 | .B Atexit | |
| 33 | returns 0 on success, \-1 on error. | |
| 34 | .SH ERRORS | |
| 35 | .TP | |
| 36 | [ENOMEM] | |
| 37 | No memory was available to add the function to the list. | |
| 38 | The existing list of functions is unmodified. | |
| 39 | .SH SEE ALSO | |
| 40 | exit(3) | |
| 41 | .SH STANDARDS | |
| 42 | .B Atexit | |
| 43 | conforms to ANSI X3.159-1989 (``ANSI C''). |