some semblance of socket support

Cargo.lock

@@ -160,6 +160,23 @@ dependencies = [
  "utf8-command",
 ]
 
+[[package]]
+name = "const-str"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18f12cc9948ed9604230cdddc7c86e270f9401ccbe3c2e98a4378c5e7632212f"
+
+[[package]]
+name = "displaydoc"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "dyn-clone"
 version = "1.0.20"
@@ -175,6 +192,8 @@ dependencies = [
  "circular-buffer",
  "clap",
  "command-error",
+ "const-str",
+ "displaydoc",
  "fs-err",
  "itertools",
  "libc",