chcon: added implementation and integration tests

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

@@ -63,6 +63,7 @@ abspath
 addprefix
 addsuffix
 endef
+findstring
 firstword
 ifeq
 ifneq
@@ -89,5 +90,9 @@ markdownlint
 rerast
 rollup
 sed
+selinuxenabled
 wslpath
 xargs
+
+# * directories
+sbin

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

@@ -107,6 +107,7 @@ whoami
 # * vars/errno
 errno
 EEXIST
+ENODATA
 ENOENT
 ENOSYS
 EPERM
@@ -119,7 +120,9 @@ fcntl
 vmsplice
 
 # * vars/libc
+COMFOLLOW
 FILENO
+FTSENT
 HOSTSIZE
 IDSIZE
 IFBLK
@@ -152,6 +155,7 @@ SIGTERM
 SYS_fdatasync
 SYS_syncfs
 USERSIZE
+accpath
 addrinfo
 addrlen
 blocksize
@@ -175,15 +179,18 @@ inode
 inodes
 isatty
 lchown
+pathlen
 setgid
 setgroups
 settime
 setuid
 socktype
 statfs
+statp
 statvfs
 strcmp
 strerror
+strlen
 syncfs
 umask
 waitpid
@@ -275,6 +282,13 @@ winerror
 winnt
 winsock
 
+# * vars/selinux
+freecon
+getfilecon
+lgetfilecon
+lsetfilecon
+setfilecon
+
 # * vars/uucore
 optflag
 optflagmulti

Cargo.toml

@@ -146,7 +146,7 @@ feat_os_unix_musl = [
 # NOTE:
 # The selinux(-sys) crate requires `libselinux` headers and shared library to be accessible in the C toolchain at compile time.
 # Running a uutils compiled with `feat_selinux` requires an SELinux enabled Kernel at run time.
-feat_selinux = ["id/selinux", "selinux"]
+feat_selinux = ["id/selinux", "selinux", "feat_require_selinux"]
 ## feature sets with requirements (restricting cross-platform availability)
 #
 # ** NOTE: these `feat_require_...` sets should be minimized as much as possible to encourage cross-platform availability of utilities
@@ -186,6 +186,10 @@ feat_require_unix_utmpx = [
     "users",
     "who",
 ]
+# "feat_require_selinux" == set of utilities depending on SELinux.
+feat_require_selinux = [
+    "chcon",
+]
 ## (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>)
 feat_os_unix_fuchsia = [
@@ -248,6 +252,7 @@ base64   = { optional=true, version="0.0.7", package="uu_base64", path="src/uu/b
 basename = { optional=true, version="0.0.7", package="uu_basename", path="src/uu/basename" }
 basenc   = { optional=true, version="0.0.7", package="uu_basenc", path="src/uu/basenc" }
 cat      = { optional=true, version="0.0.7", package="uu_cat", path="src/uu/cat" }
+chcon    = { optional=true, version="0.0.7", package="uu_chcon", path="src/uu/chcon" }
 chgrp    = { optional=true, version="0.0.7", package="uu_chgrp", path="src/uu/chgrp" }
 chmod    = { optional=true, version="0.0.7", package="uu_chmod", path="src/uu/chmod" }
 chown    = { optional=true, version="0.0.7", package="uu_chown", path="src/uu/chown" }

GNUmakefile

@@ -46,6 +46,15 @@ BUSYBOX_ROOT := $(BASEDIR)/tmp
 BUSYBOX_VER  := 1.32.1
 BUSYBOX_SRC  := $(BUSYBOX_ROOT)/busybox-$(BUSYBOX_VER)
 
+ifeq ($(SELINUX_ENABLED),)
+    SELINUX_ENABLED := 0
+    ifneq ($(OS),Windows_NT)
+        ifeq ($(shell /sbin/selinuxenabled 2>/dev/null ; echo $$?),0)
+            SELINUX_ENABLED := 1
+        endif
+    endif
+endif
+
 # Possible programs
 PROGS       := \
 	base32 \
@@ -147,10 +156,17 @@ UNIX_PROGS := \
 	users \
 	who
 
+SELINUX_PROGS := \
+	chcon
+
 ifneq ($(OS),Windows_NT)
 	PROGS    := $(PROGS) $(UNIX_PROGS)
 endif
 
+ifeq ($(SELINUX_ENABLED),1)
+    PROGS := $(PROGS) $(SELINUX_PROGS)
+endif
+
 UTILS ?= $(PROGS)
 
 # Programs with usable tests
@@ -159,6 +175,7 @@ TEST_PROGS  := \
 	base64 \
 	basename \
 	cat \
+	chcon \
 	chgrp \
 	chmod \
 	chown \
@@ -228,6 +245,9 @@ TEST_SPEC_FEATURE :=
 ifneq ($(SPEC),)
 TEST_NO_FAIL_FAST :=--no-fail-fast
 TEST_SPEC_FEATURE := test_unimplemented
+else ifeq ($(SELINUX_ENABLED),1)
+TEST_NO_FAIL_FAST :=
+TEST_SPEC_FEATURE := feat_selinux
 endif
 
 define TEST_BUSYBOX

README.md

@@ -371,18 +371,20 @@ To contribute to uutils, please see [CONTRIBUTING](CONTRIBUTING.md).
 | basename  | df        |        |
 | basenc    | expr      |        |
 | cat       | install   |        |
-| chgrp     | join      |        |
-| chmod     | ls        |        |
-| chown     | more      |        |
-| chroot    | numfmt    |        |
-| cksum     | od (`--strings` and 128-bit data types missing) |
-| comm      | pr        |        |
-| csplit    | printf    |        |
-| cut       | sort      |        |
-| dircolors | split     |        |
-| dirname   | tac       |        |
-| du        | tail      |        |
-| echo      | test      |        |
+| chcon     | join      |        |
+| cat       | ls        |        |
+| chgrp     | more      |        |
+| chmod     | numfmt    |        |
+| chown     | od (`--strings` and 128-bit data types missing) | |
+| chroot    | pr        |        |
+| cksum     | printf    |        |
+| comm      | sort      |        |
+| csplit    | split     |        |
+| cut       | tac       |        |
+| dircolors | tail      |        |
+| dirname   | test      |        |
+| du        |           |        |
+| echo      |           |        |
 | env       |           |        |
 | expand    |           |        |
 | factor    |           |        |

src/uu/chcon/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "uu_chcon"
+version = "0.0.7"
+authors = ["uutils developers"]
+license = "MIT"
+description = "chcon ~ (uutils) change file security context"
+homepage = "https://github.com/uutils/coreutils"
+repository = "https://github.com/uutils/coreutils/tree/master/src/uu/chcon"
+keywords = ["coreutils", "uutils", "cli", "utility"]
+categories = ["command-line-utilities"]
+edition = "2018"
+
+[lib]
+path = "src/chcon.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-sys  = { version = "0.5"   }
+fts-sys      = { version = "0.2"   }
+thiserror    = { version = "1.0"   }
+libc         = { version = "0.2"   }
+
+[[bin]]
+name = "chcon"
+path = "src/main.rs"