diff options
Diffstat (limited to 'nixpkgs/nixos/modules/config/stub-ld.nix')
-rw-r--r-- | nixpkgs/nixos/modules/config/stub-ld.nix | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/config/stub-ld.nix b/nixpkgs/nixos/modules/config/stub-ld.nix new file mode 100644 index 000000000000..14c07466d061 --- /dev/null +++ b/nixpkgs/nixos/modules/config/stub-ld.nix @@ -0,0 +1,56 @@ +{ config, lib, pkgs, ... }: + +let + inherit (lib) optionalString mkOption types mdDoc mkIf mkDefault; + + cfg = config.environment.stub-ld; + + message = '' + NixOS cannot run dynamically linked executables intended for generic + linux environments out of the box. For more information, see: + https://nix.dev/permalink/stub-ld + ''; + + stub-ld-for = pkgsArg: messageArg: pkgsArg.pkgsStatic.runCommandCC "stub-ld" { + nativeBuildInputs = [ pkgsArg.unixtools.xxd ]; + inherit messageArg; + } '' + printf "%s" "$messageArg" | xxd -i -n message >main.c + cat <<EOF >>main.c + #include <stdio.h> + int main(int argc, char * argv[]) { + fprintf(stderr, "Could not start dynamically linked executable: %s\n", argv[0]); + fwrite(message, sizeof(unsigned char), message_len, stderr); + return 127; // matches behavior of bash and zsh without a loader. fish uses 139 + } + EOF + $CC -Os main.c -o $out + ''; + + pkgs32 = pkgs.pkgsi686Linux; + + stub-ld = stub-ld-for pkgs message; + stub-ld32 = stub-ld-for pkgs32 message; +in { + options = { + environment.stub-ld = { + enable = mkOption { + type = types.bool; + default = true; + example = false; + description = mdDoc '' + Install a stub ELF loader to print an informative error message + in the event that a user attempts to run an ELF binary not + compiled for NixOS. + ''; + }; + }; + }; + + config = mkIf cfg.enable { + environment.ldso = mkDefault stub-ld; + environment.ldso32 = mkIf pkgs.stdenv.isx86_64 (mkDefault stub-ld32); + }; + + meta.maintainers = with lib.maintainers; [ tejing ]; +} |