Assignment 7

• Write an archiver program arch322. Your program should accept any number of arguments (to be treated as filenames). It should write (to stdout) an archive, i.e. a file that contains enough information to recreate the original files with their names. For simplicity, allow only files in the current directory to be archived (check, if the arguments contain a / and print an error message if yes). Also print useful error messages if one of the named files does not exist, etc.
• Write a dearchiver dearch322 that accepts an archive file (in your format) on stdin and recreates the original files in the current directory. Print an error message if the file is not a valid archive.
• You are free to design your own archive format, but you may get some ideas from reading the documentation (man/info) on tar/gtar. Please document your format in one or two paragraphs. You may assume UNIX I/O, i.e. no difference between text and binary I/O.
• Example:

  $ arch322 Makefile sort_csc322.c utilities.c > myarch.arch
  $ mkdir NEW
  $ cd NEW
  $ dearch322 < ../myarch.arch
  Recreating Makefile
  Recreating sort_csc322.c
  Recreating utilities.c
  $ ls
  Makefile sort_csc322.c utilities.c