Linux and Mac OSX tool to show progress for cp, rm, dd, ...
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cv - Coreutils Viewer

What is it?

This tool can be described as a Tiny, Dirty, Linux-Only¹ C command that looks for coreutils basic commands (cp, mv, dd, tar, gzip/gunzip, cat, etc.) currently running on your system and displays the percentage of copied data.

It can now also estimate throughput (using flag -w).

cv screenshot with cp and mv

(After many requests: the colors in the shell come from powerline-shell. Try it, it's cool.)

It's probably easy to add a progress, show estimated time, and, with a bit more work, provide a "top-like" mode with more accurate information.

¹: Note: a Mac OS X port is available until we merge the support upstream.

How do you build it?

make && make install

It depends on library ncurses, you may have to install corresponding packages (may be something like 'libncurses5-dev' or 'ncurses-devel').

How do you run it?

Just launch the binary, cv.

What can I do with it?

A few examples. You can:

  • monitor all current and upcoming instances of coreutils commands in a simple window:

      watch cv -q
  • see how your download is progressing:

      watch cv -wc firefox
  • look at your Web server activity:

      cv -c httpd
  • launch and monitor any heavy command using $!:

      cp bigfile newfile & cv -mp $!

and much more.

How does it work?

It simply scans /proc for interesting commands, and then looks at directories fd and fdinfo to find opened files and seek positions, and reports status for the largest file.

It's very light, and compatible with virtually any command.