On Tue, Aug 19, 2008 at 12:25:21AM -0400, Daniel Kahn Gillmor wrote:
> On Mon 2008-08-18 12:53:07 -0400, Tim Kientzle wrote:
>
> > Oh, yeah. Gunnar Ritter's "Heirloom toolchest"
> > (based on open-sourced AT&T code) is also a good
> > comparison point:
> >
> > http://heirloom.sourceforge.net/tools.html
>
> I just tested the heirloom suite here with a GNU cpio-built archive,
> and it seems to unpack the hardlinks cleanly:
>
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ strings /tmp/simple.cpio
> 0707010004E351000041ED000003E8000003E80000000248AA45A900000000000000000000001200000000000000000000000200000000a
> 0707010004E35C000081A4000003E8000003E80000000248AA45A400000000000000000000001200000000000000000000000400000000a/c
> 0707010004E35C000081A4000003E8000003E80000000248AA45A400000007000000000000001200000000000000000000000400000000a/b
> abcdef
> 07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ rm -rf a
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ ../heirloom-070715/cpio/cpio -i -d <
> /tmp/simple.cpio
> 1 blocks
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ ls -l a
> total 8
> -rw-r--r-- 2 foo foo 7 2008-08-19 00:04 b
> -rw-r--r-- 2 foo foo 7 2008-08-19 00:04 c
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ rm -rf a
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ ../heirloom-070715/cpio/pax -r <
> /tmp/simple.cpio
> 1 blocks
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ ls -l a
> total 8
> -rw-r--r-- 2 foo foo 7 2008-08-19 00:01 b
> -rw-r--r-- 2 foo foo 7 2008-08-19 00:01 c
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$
>
> And it looks like it creates the archive format the same way that GNU
> cpio does (at least as far as the hardlinks go):
>
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ find a | ../heirloom-070715/cpio/pax
> -wd -x newc | strings
> 1 blocks
> 070701ffffffff000041ed000003e9000003e90000000248aa475700000000000000ff000000ff00000000000000000000000200000000a
> 07070100000001000081a4000003e9000003e90000000248aa45a400000000000000000000000100000000000000000000000400000000a/c
> 07070100000001000081a4000003e9000003e90000000248aa45a400000007000000000000000100000000000000000000000400000000a/b
> abcdef
> 070701fffffffe000000000000000000000000000000010000000000000000000000ff000000ff00000000000000000000000b00000000TRAILER!!!
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$ find a |
> ../heirloom-070715/cpio/cpio -o -H sco | strings
> 1 blocks
> 070701ffffffff000041ed000003e9000003e90000000248aa48d700000000000000ff000000ff00000000000000000000000200000000a
> 07070100000001000081a4000003e9000003e90000000248aa45a400000000000000000000000100000000000000000000000400000000a/c
> 07070100000001000081a4000003e9000003e90000000248aa45a400000007000000000000000100000000000000000000000400000000a/b
> abcdef
> 070701fffffffe000000000000000000000000000000010000000000000000000000ff000000ff00000000000000000000000b00000000TRAILER!!!
> 0 [EMAIL PROTECTED]:~/src/heirloom/test$
>
> (weird that heirloom's cpio appears to call this format "sco" -- yet
> another term for the 070701 magic number)
>
> I built the heirloom suite (version 070715) on debian lenny/sid by
> just unpacking the tarball and running "make".
>
> I haven't had a chance to test out OpenSolaris's implementation yet.
I did a quick check of OpenSolaris, and it seems it uses the same
method as gnu cpio. So to conclude, pax is the odd one out.
-Otto
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