3.3 XFS

Support: only supported by executing xfs_db from xfsprogs, because I haven’t found any usable development library.

Compiling requirements:

• the unistd.h header
• the fcntl.h header
• the mntent.h header
• the wait.h header or sys/wait.h (not required, actually, but a good thing to have)
• the sched.h header (not required, actually, but a good thing to have)
• the paths.h header (not required, actually, but a good thing to have)
• the ‘fork()’ function
• the ‘execvp()’ function
• the ‘dup2()’ function
• the ‘close()’ function
• the ‘pipe()’ function
• the ‘kill()’ function
• the ‘waitpid()’ or ‘wait()’ function
• the ‘sleep()’ function (not required, actually, but a good thing to have)
• the ‘long long’ data type support in the compiler
• xfsprogs installed and in your PATH variable (devel package unusable, so not required). Can be downloaded from
  https://kernel.org/pub/linux/utils/fs/xfs/xfsprogs/ (previous address: ’http://oss.sgi.com/projects/xfs/’)
  
  Compile and install that package. The following utilities should be available: xfs_db, xfs_freeze, xfs_unfreeze. The xfs_db program should support the following command-line options: -i, -c and the following interactive mode commands: ‘quit’, ‘freesp -d’, ‘blockget -n’, ‘ncheck’, ‘sb 0’, ‘print’. Version 2.7.11 is enough, earlier versions will probably also work.

Operations:

• wiping the free space
• wiping deleted files’ data (part of free space or partially used blocks)
• wiping free space in partially used blocks