spectranfs: A simple tool for accessing a remote CP/M filesystem using the spectrand protocol

Usage

$ ./spectranfs <host> <port> <uid> <command> [params...]

Where host is an address (e.g. IP address) of a remote host on which the
spectrand or spectrangsx server was started, port is a TCP port number
on which spectrand (or spectrangsx) waits for remote disk image access
connections, uid is a specific user ID to be used (a single integer number in
range 0..15; alternatively, @ can be given which means 'any uid'). A command
can be any of:

• ls - list files visible by given uid (@ for any uid);

• lsmap - list data blocks on a remote disk image;

• lsent - list raw file entries on a remote disk image visible by given uid
  (@ for any uid); larger files are split across multiple entries
  with the same uid and filename;

• lsdel - list raw file entries of any deleted files on a remote disk image;

• cat - print a file with a given filename;

• get - fetch file with a given filename;

• put - send file with a given filename from the local current directory
  to a remote disk image;

• baktoggle - toggle backup attribute for a file with a given filename;

• rwtoggle - toggle read/write attribute for a file with a given filename;

• systoggle - toggle system attribute for a file with a given filename;

• del - delete a file with a given filename;

• undel - attempt to undelete a file with a given filename
  (only single entry files can be undeleted; see also lsent and lsdel);

• chown - replace uid of a file with a given filename with a new uid,
  namely:

$ ./spectranfs <host> <port> <uid> chown <filename> <new_uid>

• ren - rename a file with a given filename with a new filename (keeping
  the same uid), namely:

$ ./spectranfs <host> <port> <uid> ren <old_filename> <new_filename>