diff options
| -rw-r--r-- | README | 34 |
1 files changed, 16 insertions, 18 deletions
@@ -17,14 +17,13 @@ etc... actually exist when packing a SquashFS image. The only thing that really has to exist are the input _files_ that can be placed arbitrarily in the file system by specifying input and target locations. +An SELinux labeling file can be specified to add SELinux tags. + All directory entries are sorted by name and processed sequentially. All time stamps in the SquashFS image are set to a command line specified value (or 0 by default). Thus the entire process should be deterministic, i.e. same input produces byte-for-byte the same output. -In addition to the `gen_init_cpio` style file listing, an SELinux labeling -file can be specified to add SELinux tags. - The `rdsquashfs` program can read a SquashFS image and produce file listings, extract individual files or entire sub trees of the image to a desired @@ -36,7 +35,7 @@ location. The mksquashfs utility is semi-broken and generally a PITA to work with. -For the typically use case of SquashFS (i.e. as rootfs for a live distro or an +For the typical use case of SquashFS (i.e. as rootfs for a live distro or an embedded system), it should be blindingly obvious that I might want to micro manage what goes into the file system, that UIDs/GIDs of the host system are garbage inside the image and that setting the desired permissions (e.g. suid) @@ -75,21 +74,20 @@ list appears to be about as dead as SourceForge that hosts it. Limitations *********** -The entire code base is at the moment fairly fresh and has been hacked together -in a weekend or two. So naturally, the feature set it implements is currently -quite limited. - -At the moment, the following things are still missing: +At the moment, the following things still require some work: + - documentation + - testing - extended attributes - currently limited to SELinux labeling only - - internally, all key strings and all value strings are deduplicated. - - the entire set xattrs per inode is deduplicated. - - The key/value strings data are repeated again when writing it out. - - SquashFS also supports deduplicating values through "out of line" + - rdsquashfs ignores them entirely + - SquashFS supports deduplicating values through "out of line" storage but this is currently not used yet. - - sparse files - - hard links - - NFS export tables - - compressor options - - support for extracting SquashFS < 4.0 + - empty directories cannot have xattrs. The way I understand it, this is a + design flaw in SquashFS. I hope I'm missing something here. + - sparse files (not implemented yet) + - hard links (not implemented yet; do we even want this?) + - NFS export tables (not implemented yet) + - compressor options (stub code exists, implementation missing, command line + not implemented yet) + |