Manpage of ON_EXIT
ON_EXITSection: Linux Programmer's Manual (3)
NAMEon_exit - register a function to be called at normal process termination
#include <stdlib.h>int on_exit(void (*function)(int , void *), void *arg);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
DESCRIPTIONThe on_exit() function registers the given functionto be called at normal process termination, whether via exit(3) or via return from the program's main(). The functionis passed the status argument given to the last call to exit(3) and the argargument from on_exit().
The same function may be registered multiple times: it is called once for each registration.
RETURN VALUEThe on_exit() function returns the value 0 if successful; otherwise it returns a nonzero value.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
CONFORMING TOThis function comes from SunOS 4, but is also present in glibc. It no longer occurs in Solaris (SunOS 5). Portable application should avoid this function, and use the standard atexit(3) instead.
SEE ALSO_exit(2), atexit(3), exit(3)
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