man Pages(3): Library Routines
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NAME

atexit - add program termination routine

SYNOPSIS

#include <stdlib.h>
int atexit(void (* func)(void));

MT-LEVEL

Safe

DESCRIPTION

atexit( ) adds the function func( ) to a list of functions to be called without arguments on normal termination of the program. Normal termination occurs by either a call to the exit( ) function or a return from main( ). At most 32 functions may be registered by atexit( ); the functions will be called in the reverse order of their registration.

RETURN VALUES

atexit( ) returns 0 if the registration succeeds, nonzero if it fails.

SEE ALSO

exit(3C)