Function copyfileobj

tools/python-3.11.9-amd64/Lib/shutil.py:189–200

copy data from file-like object fsrc to file-like object fdst

(fsrc, fdst, length=0)

                fdst_write(mv)

def copyfileobj(fsrc, fdst, length=0):
    """copy data from file-like object fsrc to file-like object fdst"""
    if not length:
        length = COPY_BUFSIZE
    # Localize variable access to minimize overhead.
    fsrc_read = fsrc.read
    fdst_write = fdst.write
    while True:
        buf = fsrc_read(length)
        if not buf:
            break
        fdst_write(buf)

def _samefile(src, dst):
    # Macintosh, Unix.