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User-Agent: Mozilla/5.0 Galeon/1.2.12 (X11; FreeBSD i386; U;) Gecko/0

Description of problem:
When I tell pax to archive a really long filename (more than 3K in
length), it says:

  pax: Unable to access <a piece of the filename> <No such file or
directory>
  pax: Unable to access <next piece of the filename> <No such file or
directory>
  ... etc.

I'm invoking pax with xargs.  When I feed the same inputs to `xargs
ls', ls is able to list the files without errors.

The arguments to pax are: pax -zwdx sv4crc.

Note: maybe this archive format has filename-length limitations, but
that doesn't matter.  If so, the error is that the filename is too
long to be archived by pax, not that the file does not exist.

In the version of pax that I have source code for (FreeBSD's),
PAXPATHLEN is 3072, less than Linux's PATH_MAX (4096).

Version-Release number of selected component (if applicable):
pax v3

How reproducible:
Always

Steps to Reproduce:
 

Additional info: