realcsh(1)

✨ realcsh — the binfmt_C manual, section 1 ✨

💖 NAME 💖

realcsh.c — it's literally a shell for running C code, bestie. That's the whole vibe.

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🌸 SYNOPSIS 🌸

realcsh.c [gcc options]

🦋 DESCRIPTION 🦋

Okay so realcsh.c is an interactive shell that runs C source code. Like, you type C, it runs C. Main character behaviour fr fr.

Every line you type gets treated as a line inside a main() function, and then the resulting C code gets compiled and executed. No build files, no ceremony, just vibes and a compiler.

And here's the cute part 🎀 — if you enter a line that starts with #, like #include <stdio.h>, that line gets added to every code after that, right at the start of the sourcecode. So it's like a little prelude that sticks around forever after.

Wanna see the list of all those # lines you've accumulated? Type ##. Iconic. 👑

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🔥 EXAMPLES 🔥

Here's what a session looks like, periodt:

$ realcsh.c
REAL csh: printf("hello world\n");
hello world
REAL csh: system ("pwd");
/home/dancer/

See? You type it, it prints it, the shell ate and left no crumbs. 💅

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🧚 INTERNALS 🧚

Not me showing you exactly how the C code looks underneath 🙈 — here it is:

/*BINFMTC:
*/
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
int main(int argc, char ** argv)
{
input-line
return 0;
}

That's it. That's the whole magic trick. Your line slides right into input-line and off it goes. ✨

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👑 AUTHOR 👑

Junichi Uekawa (dancer@debian.org) — the one who made this happen, no cap.

Upstream page is available at http://www.netfort.gr.jp/~dancer/software/

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🌈 SEE ALSO 🌈

• binfmtc-interpreter(1)
• realksh.c(1)
• realcxxsh.cc(1)

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And that's the whole page, bestie 🫶 — brought to you by binfmt_misc Dancer, dated 2005 May 3. Go compile something cute. 💜