(dd_copy): When using sync with either block or unblock,

pad with spaces.

diff --git a/src/dd.c b/src/dd.c
index a271fdce3fcd2b0b38343c7ac48637fd29983d67..b493accf4bc2707ad4809f1dc823db09c56a7f61 100644 (file)
--- a/src/dd.c
+++ b/src/dd.c
@@ -946,7 +946,7 @@ dd_copy (void)
     {
       /* FIXME: this loses for
         % ./dd if=dd seek=1 |:
-        ./dd: standard output: Bad file number
+        ./dd: standard output: Bad file descriptor
         0+0 records in
         0+0 records out
         */
@@ -966,7 +966,9 @@ dd_copy (void)
         whatever data we are able to read is followed by zeros.
         This minimizes data loss. */
       if ((conversions_mask & C_SYNC) && (conversions_mask & C_NOERROR))
-       memset ((char *) ibuf, 0, input_blocksize);
+       memset ((char *) ibuf,
+               (conversions_mask & (C_BLOCK | C_UNBLOCK)) ? ' ' : '\0',
+               input_blocksize);
 
       nread = safe_read (STDIN_FILENO, ibuf, input_blocksize);
 
@@ -1005,7 +1007,8 @@ dd_copy (void)
            {
              if (!(conversions_mask & C_NOERROR))
                /* If C_NOERROR, we zeroed the block before reading. */
-               memset ((char *) (ibuf + n_bytes_read), 0,
+               memset ((char *) (ibuf + n_bytes_read),
+                       (conversions_mask & (C_BLOCK | C_UNBLOCK)) ? ' ' : '\0',
                        input_blocksize - n_bytes_read);
              n_bytes_read = input_blocksize;
            }