• findtext (5 points): Output every line that contains a specified pattern. The first command-line argument is the fixed-string pattern. Remaining arguments are the names of the files to inspect.
• webget (5 points): Fetch the file at the specified URL, and save it as a local file.
• order (5 points): Works like cat, except the output lines must be sorted before being output. All lines from all files will be mixed together and then sorted. If the "-r" command-line argument is provided, they should be sorted in reverse order.
• processes (5 points): This program gives information about CPU processes. Use the /proc file system view of the kernel to obtain this information.
  • With no arguments, it yields a list of all current processes. This should include the command-line invocation for each process.
  • With -r, it yields a list of all running processes.
  • With -s, it yields a list of all sleeping processes.
  • With -u, the list should be in descending order of user time, which should be displayed (in clock cycles). Processes not using any user time should be omitted.
  • With -k, the list should be in descending order of kernel time, which should be displayed (in clock cycles). Processes not using any kernel time should be omitted.
  • With -v, the list should be in descending order of virtual memory size, which should be displayed (in bytes). Processes without a virtual memory footprint should be omitted.

Grading