Function fnmatch 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn fnmatch(
    pattern: *const c_char,
    input: *const c_char,
    flags: c_int,
) -> c_int

See https://pubs.opengroup.org/onlinepubs/9799919799/functions/fnmatch.html.

Checks the input string to see if it matches pattern.

Safety

The input and pattern parameters must be non-null and properly aligned.