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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

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Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

C one-liners

Terminal - C one-liners
/lib/ld-linux.so.2 =(echo -e '#include <stdio.h>\nint main(){printf("c one liners\\n");}' | gcc -x c -o /dev/stdout -)
2009-02-20 06:06:29
User: mrtheplague
Functions: c++ echo gcc
C one-liners

is the runtime linker/loader for ELF binaries on Linux.

=(cmd) is a zsh trick to take the output for the command "inside" it and save it to a temporary file.

echo -e 'blah' | gcc -x c -o /dev/stdout -

pipes the C source to gcc. -x c tells gcc that it's compiling C (which is required if it's reading from a pipe). -o /dev/stdout - tells it to write the binary to standard output and read the source from standard input.

because of the the =() thing, the compiled output is stashed in a tempfile, which the loader then runs and executes, and the shell tosses the tempfile away immediately after running it.


There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

use /lib/ld-linux-x86-64.so.2 for AMD64 and other 64bit OSes.

Comment by nadavkav 386 weeks and 4 days ago

Does anyone have a bash adaption of this?

Comment by matthewbauer 357 weeks and 1 day ago

I would think something like:

echo -e "#include <stdio.h>\nint main(){printf(\"c on liners\");}" | gcc -x c -o /dev/stdout - | /lib/ld-linux.so.2 /dev/stdin

would work but it doesn't.

Comment by matthewbauer 356 weeks and 1 day ago

Your point of view

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