Provided by: manpages-dev_3.01-1_all
on_exit - register a function to be called at normal process
int on_exit(void (*function)(int , void *), void *arg);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
on_exit(): _BSD_SOURCE || _SVID_SOURCE
The on_exit() function registers the given function to be called at
normal process termination, whether via exit(3) or via return from the
program’s main(). The function is passed the argument to exit(3) and
the arg argument from on_exit().
The on_exit() function returns the value 0 if successful; otherwise it
returns a non-zero value.
This function comes from SunOS 4, but is also present in libc4, libc5
and glibc. It no longer occurs in Solaris (SunOS 5). Avoid this
function, and use the standard atexit(3) instead.
_exit(2), atexit(3), exit(3)
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