#[unsafe(no_mangle)]pub unsafe extern "C" fn errc(
eval: c_int,
code: c_int,
fmt: *const c_char,
...
) -> !Expand description
Print a user message then an error message for code before exiting with eval as a return.
The message format is progname: fmt: strerror(code)
ยงReturn
Exits with eval as an error code.