>I' ve done a little patch to fileutils to allow me to do zero copy inside
>`cp` and `dd`.
woops, sendfile is not generic enough to cope with devices in /dev/. This
little _incremental_ patch is needed:
--- copy.c~ Thu Dec 17 22:58:13 1998
+++ copy.c Thu Dec 17 22:58:59 1998
@@ -340,17 +340,8 @@
} else /* sendfile */ {
off_t offset = 0;
int retval;
- switch ((retval = sendfile(dest_desc, source_desc, &offset, sb.st_size)))
- {
- case -ENOSYS:
+ if (sendfile(dest_desc, source_desc, &offset, sb.st_size) < 0)
goto no_zero_copy;
- default:
- if (retval < 0)
- {
- error (0, errno, "%s", dst_path);
- return_val = -1;
- }
- }
}
ret:
if (close (dest_desc) < 0)
Andrea Arcangeli
-
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