runcon: added implementation and tests.

.vscode/cspell.dictionaries/shell.wordlist.txt

@@ -91,6 +91,7 @@ rerast
 rollup
 sed
 selinuxenabled
+sestatus
 wslpath
 xargs
 

.vscode/cspell.dictionaries/workspace.wordlist.txt

@@ -162,6 +162,7 @@ blocksize
 canonname
 chroot
 dlsym
+execvp
 fdatasync
 freeaddrinfo
 getaddrinfo

Cargo.toml

@@ -189,6 +189,7 @@ feat_require_unix_utmpx = [
 # "feat_require_selinux" == set of utilities depending on SELinux.
 feat_require_selinux = [
     "chcon",
+    "runcon",
 ]
 ## (alternate/newer/smaller platforms) feature sets
 # "feat_os_unix_fuchsia" == set of utilities which can be built/run on the "Fuchsia" OS (refs: <https://fuchsia.dev>; <https://en.wikipedia.org/wiki/Google_Fuchsia>)
@@ -241,7 +242,7 @@ clap = { version = "2.33", features = ["wrap_help"] }
 lazy_static = { version="1.3" }
 textwrap = { version="0.14", features=["terminal_size"] }
 uucore = { version=">=0.0.9", package="uucore", path="src/uucore" }
-selinux = { version="0.2.1", optional = true }
+selinux = { version="0.2.3", optional = true }
 # * uutils
 uu_test  = { optional=true, version="0.0.7", package="uu_test", path="src/uu/test" }
 #
@@ -313,6 +314,7 @@ realpath = { optional=true, version="0.0.7", package="uu_realpath", path="src/uu
 relpath  = { optional=true, version="0.0.7", package="uu_relpath", path="src/uu/relpath" }
 rm       = { optional=true, version="0.0.7", package="uu_rm", path="src/uu/rm" }
 rmdir    = { optional=true, version="0.0.7", package="uu_rmdir", path="src/uu/rmdir" }
+runcon   = { optional=true, version="0.0.7", package="uu_runcon", path="src/uu/runcon" }
 seq      = { optional=true, version="0.0.7", package="uu_seq", path="src/uu/seq" }
 shred    = { optional=true, version="0.0.7", package="uu_shred", path="src/uu/shred" }
 shuf     = { optional=true, version="0.0.7", package="uu_shuf", path="src/uu/shuf" }

GNUmakefile

@@ -157,7 +157,8 @@ UNIX_PROGS := \
 	who
 
 SELINUX_PROGS := \
-	chcon
+	chcon \
+	runcon
 
 ifneq ($(OS),Windows_NT)
 	PROGS    := $(PROGS) $(UNIX_PROGS)
@@ -216,6 +217,7 @@ TEST_PROGS  := \
 	realpath \
 	rm \
 	rmdir \
+	runcon \
 	seq \
 	sort \
 	split \

README.md

@@ -365,8 +365,8 @@ To contribute to uutils, please see [CONTRIBUTING](CONTRIBUTING.md).
 
 | Done      | Semi-Done | To Do  |
 |-----------|-----------|--------|
-| arch      | cp        | runcon |
-| base32    | date      | stty   |
+| arch      | cp        | stty   |
+| base32    | date      |        |
 | base64    | dd        |        |
 | basename  | df        |        |
 | basenc    | expr      |        |
@@ -426,6 +426,7 @@ To contribute to uutils, please see [CONTRIBUTING](CONTRIBUTING.md).
 | relpath   |           |        |
 | rm        |           |        |
 | rmdir     |           |        |
+| runcon    |           |        |
 | seq       |           |        |
 | shred     |           |        |
 | shuf      |           |        |

src/uu/runcon/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "uu_runcon"
+version = "0.0.7"
+authors = ["uutils developers"]
+license = "MIT"
+description = "runcon ~ (uutils) run command with specified security context"
+homepage = "https://github.com/uutils/coreutils"
+repository = "https://github.com/uutils/coreutils/tree/master/src/uu/runcon"
+keywords = ["coreutils", "uutils", "cli", "utility"]
+categories = ["command-line-utilities"]
+edition = "2018"
+
+[lib]
+path = "src/runcon.rs"
+
+[dependencies]
+clap         = { version = "2.33", features = ["wrap_help"] }
+uucore       = { version = ">=0.0.9", package="uucore", path="../../uucore", features=["entries", "fs", "perms"] }
+uucore_procs = { version = ">=0.0.6", package="uucore_procs", path="../../uucore_procs" }
+selinux      = { version = "0.2"   }
+fts-sys      = { version = "0.2"   }
+thiserror    = { version = "1.0"   }
+libc         = { version = "0.2"   }
+
+[[bin]]
+name = "runcon"
+path = "src/main.rs"

src/uu/runcon/src/errors.rs

@@ -0,0 +1,73 @@
+use std::ffi::OsString;
+use std::fmt::Write;
+use std::io;
+use std::str::Utf8Error;
+
+pub(crate) type Result<T> = std::result::Result<T, Error>;
+
+#[derive(thiserror::Error, Debug)]
+pub(crate) enum Error {
+    #[error("No command is specified")]
+    MissingCommand,
+
+    #[error("SELinux is not enabled")]
+    SELinuxNotEnabled,
+
+    #[error(transparent)]
+    NotUTF8(#[from] Utf8Error),
+
+    #[error(transparent)]
+    CommandLine(#[from] clap::Error),
+
+    #[error("{operation} failed")]
+    SELinux {
+        operation: &'static str,
+        source: selinux::errors::Error,
+    },
+
+    #[error("{operation} failed")]
+    Io {
+        operation: &'static str,
+        source: io::Error,
+    },
+
+    #[error("{operation} failed on '{}'", .operand1.to_string_lossy())]
+    Io1 {
+        operation: &'static str,
+        operand1: OsString,
+        source: io::Error,
+    },
+}
+
+impl Error {
+    pub(crate) fn from_io(operation: &'static str, source: io::Error) -> Self {
+        Self::Io { operation, source }
+    }
+
+    pub(crate) fn from_io1(
+        operation: &'static str,
+        operand1: impl Into<OsString>,
+        source: io::Error,
+    ) -> Self {
+        Self::Io1 {
+            operation,
+            operand1: operand1.into(),
+            source,
+        }
+    }
+
+    pub(crate) fn from_selinux(operation: &'static str, source: selinux::errors::Error) -> Self {
+        Self::SELinux { operation, source }
+    }
+}
+
+pub(crate) fn report_full_error(mut err: &dyn std::error::Error) -> String {
+    let mut desc = String::with_capacity(256);
+    write!(&mut desc, "{}", err).unwrap();
+    while let Some(source) = err.source() {
+        err = source;
+        write!(&mut desc, ": {}", err).unwrap();
+    }
+    desc.push('.');
+    desc
+}

src/uu/runcon/src/main.rs

@@ -0,0 +1 @@
+uucore_procs::main!(uu_runcon);