remove old splice code

bin/bombshell-client

@@ -24,81 +24,6 @@ MAX_MUX_READ = 128*1024 # 64*1024*1024
 PACKLEN = 8
 PACKFORMAT = "!HbIx"
 
-# From bits/fcntl.h
-# Values for 'flags', can be OR'ed together
-SPLICE_F_MOVE = 1
-SPLICE_F_NONBLOCK = 2
-SPLICE_F_MORE = 4
-SPLICE_F_GIFT = 8
-
-def make_splice():
-    '''Set up a splice(2) wrapper'''
-
-    # Load libc
-    libc_name = ctypes.util.find_library('c')
-    libc = ctypes.CDLL(libc_name, use_errno=True)
-
-    # Get a handle to the 'splice' call
-    c_splice = libc.splice
-
-    # These should match for x86_64, might need some tweaking for other
-    # platforms...
-    c_loff_t = ctypes.c_uint64
-    c_loff_t_p = ctypes.POINTER(c_loff_t)
-
-    # ssize_t splice(int fd_in, loff_t *off_in, int fd_out,
-    #     loff_t *off_out, size_t len, unsigned int flags)
-    c_splice.argtypes = [
-        ctypes.c_int, c_loff_t_p,
-        ctypes.c_int, c_loff_t_p,
-        ctypes.c_size_t,
-        ctypes.c_uint
-    ]
-    c_splice.restype = ctypes.c_ssize_t
-
-    # Clean-up closure names. Yup, useless nit-picking.
-    del libc
-    del libc_name
-    del c_loff_t_p
-
-    # pylint: disable-msg=W0621,R0913
-    def splice(fd_in, off_in, fd_out, off_out, len_, flags):
-        '''Wrapper for splice(2)
-        See the syscall documentation ('man 2 splice') for more information
-        about the arguments and return value.
-        `off_in` and `off_out` can be `None`, which is equivalent to `NULL`.
-        If the call to `splice` fails (i.e. returns -1), an `OSError` is raised
-        with the appropriate `errno`, unless the error is `EINTR`, which results
-        in the call to be retried.
-        '''
-
-        c_off_in = \
-            ctypes.byref(c_loff_t(off_in)) if off_in is not None else None
-        c_off_out = \
-            ctypes.byref(c_loff_t(off_out)) if off_out is not None else None
-
-        # For handling EINTR...
-        while True:
-            res = c_splice(fd_in, c_off_in, fd_out, c_off_out, len_, flags)
-
-            if res == -1:
-                errno_ = ctypes.get_errno()
-
-                # Try again on EINTR
-                if errno_ == errno.EINTR:
-                    continue
-
-                raise IOError(errno_, os.strerror(errno_))
-
-            return res
-
-    return splice
-
-
-# Build and export wrapper
-splice = make_splice() #pylint: disable-msg=C0103
-del make_splice
-
 
 @contextlib.contextmanager
 def mutexfile(filepath):