Basic Wyng functions on FreeBSD

[tasket]

Experiment

See if Wyng can list and retrieve data on non-Linux systems.

Test system

• FreeBSD 14.0 in Qubes HVM
• Python 3.9
• Wyng 0.8 beta5

Observations

After installing the py39-zstd and py39-pycryptodome packages in FreeBSD, then copying an existing Wyng archive from a Linux VM...

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Trying simple wyng --dest=file:/path list:

• ctypes setup of fallocate() fails –this function is only needed for receive
• Cryptodome library doesn't expose its own name, only as "Crypto" namespace
• The following block stops initialization with an IOError (probably the /var/lock path is not supported):

    lockf = open(lockpath, "w")
    fcntl.lockf(lockf, fcntl.LOCK_EX|fcntl.LOCK_NB)

• Some command paths in class CP don't match
• stat -f -c '%a %S' fails with 'No such file or directory' –probably replace this with df -P
• chattr command not found
• Workarounds for all of the above succeeded in producing an archive listing

Also:

• Auth agent doesn't work; passphrase not cached

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Trying wyng --dest=file:/path verify volname:

• The following awk command exited with status 2:

do_exec([[CP.awk, r'{sub("/manifest","",FILENAME); print $0, FILENAME > "'
         +cdir+r'/"FILENAME}', fname+"/manifest"]], cwd=vol.path)

Installing gawk and changing the command path fixed this.

• BSD sed does not like the \s and \S sequences for space; works with the replacements ' ' and [^ ].

• With these two workarounds, verify operations succeeded.

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Trying simple wyng --dest=file:/path --save-to=test.img receive volname:

• lvm command not available
• '/etc/mtab' not available

[tasket]

These issues are basically resolvable for verify. In addition to the recent commits, do:

• Auto-disable chattr use on non-Linux env (or just test for presence of the command).
• Reconfigure other paths in class CP.
• Install py39-pycryptodomex to supply the correct namespace. (Note the 'x'.)
• Simple (automatic?) transform of that one sed pattern