dmesg: initialize empty dmesg crate.

Cargo.lock

@@ -880,6 +880,7 @@ dependencies = [
  "tempfile",
  "textwrap",
  "uu_ctrlaltdel",
+ "uu_dmesg",
  "uu_last",
  "uu_lscpu",
  "uu_lsmem",
@@ -898,6 +899,14 @@ dependencies = [
  "uucore",
 ]
 
+[[package]]
+name = "uu_dmesg"
+version = "0.0.1"
+dependencies = [
+ "clap",
+ "uucore",
+]
+
 [[package]]
 name = "uu_last"
 version = "0.0.1"

Cargo.toml

@@ -32,7 +32,8 @@ feat_common_core = [
   "ctrlaltdel",
   "rev",
   "setsid",
-  "last"
+  "last",
+  "dmesg"
 ]
 
 [workspace.dependencies]
@@ -72,6 +73,7 @@ ctrlaltdel = { optional = true, version = "0.0.1", package = "uu_ctrlaltdel", pa
 rev = { optional = true, version = "0.0.1", package = "uu_rev", path = "src/uu/rev" }
 setsid = { optional = true, version = "0.0.1", package = "uu_setsid", path ="src/uu/setsid" }
 last = { optional = true, version = "0.0.1", package = "uu_last", path = "src/uu/last" }
+dmesg = { optional = true, version = "0.0.1", package = "uu_dmesg", path = "src/uu/dmesg" }
 
 [dev-dependencies]
 pretty_assertions = "1"

src/uu/dmesg/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "uu_dmesg"
+version = "0.0.1"
+edition = "2021"
+
+[lib]
+path = "src/dmesg.rs"
+
+[[bin]]
+name = "dmesg"
+path = "src/main.rs"
+
+[dependencies]
+clap = { workspace = true }
+uucore = { workspace = true }

src/uu/dmesg/src/dmesg.rs

@@ -0,0 +1,11 @@
+use clap::{crate_version, Command};
+use uucore::error::UResult;
+
+#[uucore::main]
+pub fn uumain(_args: impl uucore::Args) -> UResult<()> {
+    Ok(())
+}
+
+pub fn uu_app() -> Command {
+    Command::new(uucore::util_name()).version(crate_version!())
+}

src/uu/dmesg/src/main.rs

@@ -0,0 +1 @@
+uucore::bin!(uu_dmesg);