The explain_setdomainname_or_die function is used to call the
setdomainname(2) system call. On failure an explanation will be
printed to stderr, obtained from the
explain_setdomainname(3) function, and then the process terminates
by calling exit(EXIT_FAILURE).
The explain_setdomainname_on_error function is used to call the
setdomainname(2) system call. On failure an explanation will be
printed to stderr, obtained from the
explain_setdomainname(3) function, but still returns to the caller.
data
The data, exactly as to be passed to the setdomainname(2) system
call.
data_size
The data_size, exactly as to be passed to the setdomainname(2)
system call.
RETURN VALUE
The explain_setdomainname_or_die function only returns on success,
see setdomainname(2) for more information. On failure, prints an
explanation and exits, it does not return.
The explain_setdomainname_on_error function always returns the
value return by the wrapped setdomainname(2) system call.
EXAMPLE
The explain_setdomainname_or_die function is intended to be used in
a fashion similar to the following example: