Run C code in Bash

lolc.sh

#!/bin/bash
# lolc.sh - run c code in bash
# by justine tunney <[email protected]>
# licensed mit or apache 2.0

runc() {
  local bin=$(mktemp -u)
  gcc -xc -o ${bin} /dev/stdin || return
  chmod u+x ${bin}
  ${bin} "$@"
  local rc=$?
  rm -f ${bin}
  return ${rc}
}

c() {
  local code=$1
  shift
  {
    {
      for dep in $(grep -Po '\w+(?=\()' <<<"${code}" | sort -u); do
        man 2 ${dep} 2>/dev/null | grep -Po '#include <.*?>'
        man 3 ${dep} 2>/dev/null | grep -Po '#include <.*?>'
      done
    } | sort -u
    printf "int main(int argc, char** argv) {\n"
    printf "  %s;\n" "${code}"
    printf "  return 0;\n"
    printf "}\n"
  } | runc "$@"
}

c 'puts("hello kitty")'
c 'printf("%s + %s = %d\n", argv[1], argv[2], atoi(argv[1]) + atoi(argv[2]))' 7 11

That's a really neat idea. I'll add this to a contrib directory...maybe a more descriptive name though ;)
I'm afk today, I'll commit this tomorrow.

If you emit a shared library you could do a kind of inline-C-for-bash :-).

Glad to hear that @taviso. I just licensed it wtfpl for the sake of legal formality.

You could consider Fabrice Bellard's blazing-fast TinyCC http://bellard.org/tcc/
Also it supports scripting C