[Bug-cpio] 2.7 produces corrupt symlinks in archives

[Andrew Walrond]

Hello list,

I've been experimenting with large (500Mb) initramfs cpio archives on 
linux, x86_64, using cpio 2.7, compiled 64bit with gcc4.1.1.

If I create a cpio archive, then extract it and compare with the 
original, I see broken symlinks.

I don't know if the archives themselves are corrupt, or whether the 
extraction code is broken, but I guess you guys can work that out.

An example:

address@hidden initramfs $ cd rootfs
address@hidden rootfs $ find . | cpio -o -H newc > ../rootfs.cpio
857030 blocks
address@hidden rootfs $ cd ..
address@hidden initramfs $ mkdir tmp
address@hidden initramfs $ cd tmp
address@hidden tmp $ cpio -i -d -H newc -F ../rootfs.cpio 
--no-absolute-filenames
857030 blocks
address@hidden tmp $ ll ../rootfs/pkg/linux/lib/modules/2.6.19.2/
total 1.1M
lrwxrwxrwx  1 root root   17 Jan 11 13:39 build -> /pkg/linux/source
drwxrwxr-x 11 root root 4.0K Jan 11 11:14 kernel
-rw-rw-r--  1 root root 229K Jan 11 11:14 modules.alias
-rw-rw-r--  1 root root   69 Jan 11 11:14 modules.ccwmap
-rw-rw-r--  1 root root 246K Jan 11 11:14 modules.dep
-rw-rw-r--  1 root root  813 Jan 11 11:14 modules.ieee1394map
-rw-rw-r--  1 root root  788 Jan 11 11:14 modules.inputmap
-rw-rw-r--  1 root root 2.6K Jan 11 11:14 modules.isapnpmap
-rw-rw-r--  1 root root   74 Jan 11 11:14 modules.ofmap
-rw-rw-r--  1 root root 161K Jan 11 11:14 modules.pcimap
-rw-rw-r--  1 root root  967 Jan 11 11:14 modules.seriomap
-rw-rw-r--  1 root root 100K Jan 11 11:14 modules.symbols
-rw-rw-r--  1 root root 306K Jan 11 11:14 modules.usbmap
lrwxrwxrwx  1 root root   17 Jan 11 13:39 source -> /pkg/linux/source
address@hidden tmp $ ll pkg/linux/lib/modules/2.6.19.2/
total 1.1M
lrwxrwxrwx  1 root root   23 Jan 12 12:08 build -> /pkg/linux/sourceodules
drwxrwxr-x 11 root root 4.0K Jan 12 12:08 kernel
-rw-rw-r--  1 root root 229K Jan 12 12:08 modules.alias
-rw-rw-r--  1 root root   69 Jan 12 12:08 modules.ccwmap
-rw-rw-r--  1 root root 246K Jan 12 12:08 modules.dep
-rw-rw-r--  1 root root  813 Jan 12 12:08 modules.ieee1394map
-rw-rw-r--  1 root root  788 Jan 12 12:08 modules.inputmap
-rw-rw-r--  1 root root 2.6K Jan 12 12:08 modules.isapnpmap
-rw-rw-r--  1 root root   74 Jan 12 12:08 modules.ofmap
-rw-rw-r--  1 root root 161K Jan 12 12:08 modules.pcimap
-rw-rw-r--  1 root root  967 Jan 12 12:08 modules.seriomap
-rw-rw-r--  1 root root 100K Jan 12 12:08 modules.symbols
-rw-rw-r--  1 root root 306K Jan 12 12:08 modules.usbmap
lrwxrwxrwx  1 root root   23 Jan 12 12:08 source -> /pkg/linux/sourceodules
address@hidden tmp $

The extra 'odules is suspiciously like 'modules'...

I am now using version 2.6 with debian patches to 2.6-17, and this works 
fine. I've tried making a small test case, but it only seems to occur 
with my large (500Mb) root filesystem archives. I f I just archive the 
modules directory in the example above, the corruption does not occur.

Anyhow; if I can do anything to chase this down further, let me know. I 
have joined the ML.

Andrew Walrond