From: Leah Neukirchen <leah@vuxu.org>
To: ron minnich <rminnich@gmail.com>
Cc: The Eunuchs Hysterical Society <tuhs@tuhs.org>
Subject: [TUHS] Re: another OSX 100% less Unix
Date: Thu, 27 Jun 2024 11:47:05 +0200 [thread overview]
Message-ID: <87zfr6emzq.fsf@vuxu.org> (raw)
In-Reply-To: <CAP6exY+p1AwGOixSBVBYeUmmvRcpq9pgXN5iGJw0t58wYWVm_A@mail.gmail.com> (ron minnich's message of "Wed, 26 Jun 2024 20:29:27 -0700")
ron minnich <rminnich@gmail.com> writes:
> I have a directory, t:
> ronsexcllentmbp:t rminnich$ ls -li
> total 0
> 23801442 -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:21 a
> 23801443 -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 b
> 23801443 -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 c
>
> note that b and c are the same inode.
>
> let's make a cpio.
>
> ronsexcllentmbp:t rminnich$ cpio -o >../t.cpio
> a
> b
> c
> ^D
> 1 block
>
> what's in it?
> ronsexcllentmbp:t rminnich$ cpio -ivt < ../t.cpio
> -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:21 a
> -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 b
> -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 c link to b
>
> "c link to b"? wtf? Who thought that was a good idea? because ...
> ronsexcllentmbp:t rminnich$ touch 'c link to b'
> ronsexcllentmbp:t rminnich$ ls -l
> total 0
> -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:21 a
> -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 b
> -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 c
> -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:22 c link to b
This is a feature of libarchive (cpio since FreeBSD 8), note that
without -v it prints the actual names as tools expect it.
(Similarly, symlinks are printed as "c -> b".)
More fun is that it's not able to extract only "c", even tho the ASCII
cpio format stores hard links by duplicating the data...
--
Leah Neukirchen <leah@vuxu.org> https://leahneukirchen.org/
next prev parent reply other threads:[~2024-06-27 9:47 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-27 3:29 [TUHS] " ron minnich
2024-06-27 3:30 ` [TUHS] " ron minnich
2024-06-27 9:47 ` Leah Neukirchen [this message]
2024-06-27 22:22 ` Bakul Shah via TUHS
2024-06-27 11:55 ` Peter Yardley
2024-06-27 12:06 ` Dan Cross
2024-06-27 13:54 ` Warner Losh
2024-06-27 19:08 ` Stuff Received
2024-06-27 19:44 ` segaloco via TUHS
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