2. Walk + Parse

Write a program parser.c that takes exactly 3 arguments:

./parser arg1 arg2 arg3
1. if arg_i is an integer number, this defines N for the upcoming search
2. if arg_i is a name of existing directory, it defines directory for upcoming search
3. otherwise arg_i is treated as glob file pattern
  - Note: this is not regexp, see fnmatch for more info
If all tree arguments are provided in any order, the program walks over all files in the directory (non-recursive), and prints N-th file object name matching pattern

HSE/ProgrammingOS/Lab_18_Test/Parse_Walk (последним исправлял пользователь FrBrGeorge 2020-05-08 17:14:00)