Cette application nb4-unsquash est juste l'adaption de la suite inflate-lzma prsente dans le rpertoire kernel/linux/fs/inflate-lzma de la distribution Broadcom  la procdure unsquashfs.c de la suite squashfs3.3
http://sourceforge.net/project/showfiles.php?group_id=63835

Un simple Make devrait construire l'utilitaire nb4-unsquash

Pour l'utiliser
./nb4-unsquash
SYNTAX: ./unsqlzma [options] filesystem [directories or files to extract]
  -v[ersion]  print version, licence and copyright information
  -i[nfo]    print files as they are unsquashed
  -li[nfo]  print files as they are unsquashed with file
        attributes (like ls -l output)
  -l[s]     list filesystem, but don't unsquash
  -ll[s]     list filesystem with file attributes (like
        ls -l output), but don't unsquash
  -d[est] <pathname> unsquash to <pathname>, default "squashfs-root"
  -f[orce]  if file already exists then overwrite
  -s[tat]    display filesystem superblock information
  -e[f] <extract file>  list of directories or files to extract.
        One per line
  -r[egex]  treat extract names as POSIX regular expressions
        rather than use the default shell wildcard
        expansion (globbing)


pour lister les fichiers du fichier xx.sqsh
./nb4-unsquash -ll xx.sqsh

pour extraire les fichiers du fichier xx.sqsh dans le rpertoire yy
./nb4-unsquash -d yy xx.sqsh
