Function mmal_sys::vcos_safe_strcpy

pub unsafe extern "C" fn vcos_safe_strcpy(
    dst: *mut c_char, 
    src: *const c_char, 
    dstlen: usize, 
    offset: usize
) -> usize

Copies string src to dst at the specified offset. Output is truncated to fit in dstlen bytes, i.e. the string is at most (buflen - 1) characters long. Unlike strncpy, exactly one NUL is written to dst, which is always NUL-terminated. Returns the string length before/without truncation.