обмен переносными архивами (portable archive interchange)
Стандартный вывод сообщений (Stderr)
If -v is specified in read, write, or copy modes, pax shall write
the pathnames it processes to the standard error output using the
following format:
"%s\n", <pathname>
These pathnames shall be written as soon as processing is begun
on the file or archive member, and shall be flushed to standard
error. The trailing <newline>, which shall not be buffered, is
written when the file has been read or written.
If the -s option is specified, and the replacement string has a
trailing 'p', substitutions shall be written to standard error in
the following format:
"%s >> %s\n", <original pathname>, <new pathname>
In all operating modes of pax, optional messages of unspecified
format concerning the input archive format and volume number, the
number of files, blocks, volumes, and media parts as well as
other diagnostic messages may be written to standard error.
In all formats, for both standard output and standard error, it
is unspecified how non-printable characters in pathnames or link
names are written.
When using the -xpax archive format, if a filename, link name,
group name, owner name, or any other field in an extended header
record cannot be translated between the codeset in use for that
extended header record and the character set of the current
locale, pax shall write a diagnostic message to standard error,
shall process the file as described for the -o invalid= option,
and then shall continue processing with the next file.
