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ATEXIT (3) | C library functions | Unix Manual Pages | :man

NAME

atexit - register a function to be called on exit

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In stdlib.h int atexit "void (*function)(void)"

DESCRIPTION

The atexit function registers the given function to be called at program exit, whether via exit(3) or via return from the program’s main. Functions so registered are called in reverse order; no arguments are passed.

These functions must not call exit; if it should be necessary to terminate the process while in such a function, the _exit(2) function should be used. (Alternatively, the function may cause abnormal process termination, for example by calling abort 3.)

At least 32 functions can always be registered, and more are allowed as long as sufficient memory can be allocated.

RETURN VALUES


.Rv -std atexit

ERRORS

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

SEE ALSO

exit(3)

STANDARDS


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