63 lines
1.5 KiB
Nix
63 lines
1.5 KiB
Nix
{ config, lib, pkgs, ... }:
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with config.krebs.lib;
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rec {
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execve = name: { filename, argv ? null, envp ? {}, destination ? "" }: let
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in writeC name { inherit destination; } ''
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#include <unistd.h>
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static char *const filename = ${toC filename};
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${if argv == null
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then /* Propagate arguments */ ''
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#define MAIN_ARGS int argc, char **argv
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''
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else /* Provide fixed arguments */ ''
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#define MAIN_ARGS void
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static char *const argv[] = ${toC (argv ++ [null])};
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''}
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static char *const envp[] = ${toC (
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mapAttrsToList (k: v: "${k}=${v}") envp ++ [null]
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)};
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int main (MAIN_ARGS) {
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execve(filename, argv, envp);
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return -1;
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}
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'';
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execveBin = name: cfg: execve name (cfg // { destination = "/bin/${name}"; });
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writeC = name: { destination ? "" }: src: pkgs.runCommand name {} ''
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PATH=${makeSearchPath "bin" (with pkgs; [
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binutils
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coreutils
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gcc
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])}
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src=${pkgs.writeText "${name}.c" src}
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exe=$out${destination}
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mkdir -p "$(dirname "$exe")"
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gcc -O -Wall -o "$exe" $src
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strip --strip-unneeded "$exe"
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'';
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writeDash = name: text: pkgs.writeScript name ''
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#! ${pkgs.dash}/bin/dash
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${text}
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'';
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writeDashBin = name: text: pkgs.writeTextFile {
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executable = true;
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destination = "/bin/${name}";
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name = name;
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text = ''
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#! ${pkgs.dash}/bin/dash
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${text}
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'';
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};
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writeNixFromCabal = name: path: pkgs.runCommand name {} ''
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${pkgs.cabal2nix}/bin/cabal2nix ${path} > $out
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'';
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}
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