[sisyphus] isofs mount options in kernel 2.6

[sisyphus] isofs mount options in kernel 2.6

[Alexey Novikov]

Hi, All!

Наткнулся тут на такой факт: в модуле isofs ядра 2.6.5
отсутствуют опции монтирования umask и codepage. Хотя они для меня 
и не критичны, но все же. Кстати, интересно, а RockRidge extension
в какой кодировке держит имена файлов?

А вообще изыскания привели к несоответствию доки ядра. А именно,
/usr/share/doc/kernel-doc-std26-2.6.5/filesystems/isofs.txt:																												>Mount options that are the same as for msdos and vfat partitions.
>
>  gid=nnn	All files in the partition will be in group nnn.
>  uid=nnn	All files in the partition will be owned by user id nnn.
>  umask=nnn	The permission mask (see umask(1)) for the partition.
>
>Mount options that are the same as vfat partitions. These are only useful
>when using discs encoded using Microsoft's Joliet extensions.
>  iocharset=name Character set to use for converting from Unicode to
>		ASCII.  Joliet filenames are stored in Unicode format, but
>		Unix for the most part doesn't know how to deal with Unicode.
>		There is also an option of doing UTF8 translations with the
>		utf8 option.
>  utf8          Encode Unicode names in UTF8 format. Default is no.
>
>Mount options unique to the isofs filesystem.
>  block=512     Set the block size for the disk to 512 bytes
>  block=1024    Set the block size for the disk to 1024 bytes
>  block=2048    Set the block size for the disk to 2048 bytes
>  check=relaxed Matches filenames with different cases
>  check=strict  Matches only filenames with the exact same case
>  cruft         Try to handle badly formatted CDs.
>  map=off       Do not map non-Rock Ridge filenames to lower case
>  map=normal    Map non-Rock Ridge filenames to lower case
>  map=acorn     As map=normal but also apply Acorn extensions if present
>  mode=xxx      Sets the permissions on files to xxx
>  nojoliet      Ignore Joliet extensions if they are present.
>  norock        Ignore Rock Ridge extensions if they are present.
>  unhide        Show hidden files.
>  session=x     Select number of session on multisession CD
>  sbsector=xxx  Session begins from sector xxx
>
>Recommended documents about ISO 9660 standard are located at:
>http://www.y-adagio.com/public/standards/iso_cdromr/tocont.htm
>ftp://ftp.ecma.ch/ecma-st/Ecma-119.pdf
>Quoting from the PDF "This 2nd Edition of Standard ECMA-119 is technically 
>identical with ISO 9660.", so it is a valid and gratis substitute of the
>official ISO specification.

Как видим, umask есть. Есть также ссылки на идентичность с опциями vfat.
С другой стороны,
linux-2.6.5/fs/isofs.c:

>static match_table_t tokens = {
>	{Opt_norock, "norock"},
>	{Opt_nojoliet, "nojoliet"},
>	{Opt_unhide, "unhide"},
>	{Opt_cruft, "cruft"},
>	{Opt_utf8, "utf8"},
>	{Opt_iocharset, "iocharset=%s"},
>	{Opt_map_a, "map=acorn"},
>	{Opt_map_a, "map=a"},
>	{Opt_map_n, "map=normal"},
>	{Opt_map_n, "map=n"},
>	{Opt_map_o, "map=off"},
>	{Opt_map_o, "map=o"},
>	{Opt_session, "session=%u"},
>	{Opt_sb, "sbsector=%u"},
>	{Opt_check_r, "check=relaxed"},
>	{Opt_check_r, "check=r"},
>	{Opt_check_s, "check=strict"},
>	{Opt_check_s, "check=s"},
>	{Opt_uid, "uid=%u"},
>	{Opt_gid, "gid=%u"},
>	{Opt_mode, "mode=%u"},
>	{Opt_block, "block=%u"},
>	{Opt_ignore, "conv=binary"},
>	{Opt_ignore, "conv=b"},
>	{Opt_ignore, "conv=text"},
>	{Opt_ignore, "conv=t"},
>	{Opt_ignore, "conv=mtext"},
>	{Opt_ignore, "conv=m"},
>	{Opt_ignore, "conv=auto"},
>	{Opt_ignore, "conv=a"},
>	{Opt_nocompress, "nocompress"},
>	{Opt_err, NULL}
>};

Как видим здесь нет никакого упоминания про uamsk и codepage.:)
Следовательно не работает...:(

-- 
С уважением,
Алексей Новиков