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Diffstat (limited to 'hurd/translator/ext2fs/filetype.mdwn')
| -rw-r--r-- | hurd/translator/ext2fs/filetype.mdwn | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/hurd/translator/ext2fs/filetype.mdwn b/hurd/translator/ext2fs/filetype.mdwn new file mode 100644 index 00000000..5d85bac9 --- /dev/null +++ b/hurd/translator/ext2fs/filetype.mdwn @@ -0,0 +1,33 @@ +[[!meta copyright="Copyright © 2011 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +The *ext2fs* translator doesn't support the ext2 format's *filetype* option. + +According to *mke2fs(8)*: + +> **filetype**: Store file type information in directory entries. + +By setting directory listings' informational `d_type` field (`readdir`, etc.), +this may avoid the need for subsequent `stat` calls. + +Not all file systems can support this option. + +In `[hurd]/ext2fs/dir.c` the `EXT2_FEATURE_INCOMPAT_FILETYPE` is generally +masked out (is not even considered) when adding a node to a directory in +`diskfs_direnter_hard` and when reading in `diskfs_get_directs`. The Hurd's +ext2fs unconditionally sets this field to 0 (`EXT2_FT_UNKNOWN`). + + +# `e2fsck` + +Running `e2fsck` on a file system with the *filetype* option, will correct the +*filetype* for a lot of files (all `EXT2_FT_UNKNOWN`?) to either 1 (regular +file, `EXT2_FT_REG_FILE`), or 2 (directory, `EXT2_FT_DIR`), and likely others. +The Hurd's ext2fs will again ignore these fields, of course. |