coreutils/tests/dd/sparse, branch v8.18

tests: skip part of dd/sparse on some file systems

2012-03-23T11:47:52Z

* tests/dd/sparse: The last two parts of this test would fail due to the underlying file system at least on Solaris 10 with NFS. That file system would report that a 3MiB file was occupying <= 1KiB of space for nearly 50 seconds after creation. Improved-by: Bernhard Voelker

tests: avoid spurious dd/sparse failure

2012-03-20T10:30:39Z

* tests/dd/sparse: Allow for greater variation in sparse-block counts. Reported by Nelson H. F. Beebe and Bruno Haible.

tests: work around a block alignment issue in dd/sparse

2012-03-02T10:57:56Z

Prompted by the continuous integration build failure at: http://hydra.nixos.org/build/2188210 (which uses XFS). * tests/dd/sparse (alloc_equal): Add a block allocation comparison function that accounts for variations due to alignment.

dd: add support for the conv=sparse option

2012-02-29T00:17:56Z

Notes: Small seeks are not coalesced to larger ones, like is done in cache_round() for example. conv= is used rather then oflag= for FreeBSD compatibility. * src/dd.c (final_op_was_seek): A new global boolean to flag whether the final "write" was converted to a seek. (usage): Describe the new conf=sparse option. (iwrite): Convert a write of a NUL block to a seek if requested. (do_copy): Initialize the output buffer to have a sentinel, to allow for efficient testing for NUL output blocks. If the last block in the file was converted to a seek, then convert back to a write so the size is updated. * NEWS: Mention the new feature. * tests/dd/sparse: A new test for the feature. * tests/Makefile.am: Reference the new test.