Fix tr hack to not leak

Rather then leaking a boxed value to keep the upstream code working wrap the unescape string into a cow. This causes a bunch of allocations to happen if the upper/lower character classes are used but at least there are no allocations leaked.

Signed-off-by: Sjoerd Simons sjoerd@collabora.com

debian/patches/HACK-cp-mv-ls-add-dummy-missing-arguments.patch

+From: Arnaud Ferraris <arnaud.ferraris@collabora.com>
+Date: Mon, 7 Jun 2021 18:13:18 +0200
+Subject: HACK cp, mv, ls: add dummy missing arguments
+
+Post-installation scripts for `apparmor` and the kernel make use of
+the `-Z` flag for `cp` or `mv` in order to set the SELinux context of
+copied/moved files. As the current implementations don't support this
+flag, the commands error out, causing those packages' installation to
+fail. As those are required, building Apertis images using
+`rust-coreutils` subsequently fails too.
+
+This commit adds support for the `-Z` flag without implementing the
+associated behavior as it isn't strictly needed for building basic
+Apertis images.
+
+Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
+
+Forwarded: not-needed
+Bug: https://github.com/uutils/coreutils/issues/2404
+---
+ src/uu/cp/src/cp.rs |  4 ++++
+ src/uu/ls/src/ls.rs | 10 ++++++++++
+ src/uu/mv/src/mv.rs | 11 +++++++++++
+ 3 files changed, 25 insertions(+)
+
+diff --git a/src/uu/cp/src/cp.rs b/src/uu/cp/src/cp.rs
+index 569ee78..1277acc 100644
+--- a/src/uu/cp/src/cp.rs
++++ b/src/uu/cp/src/cp.rs
+@@ -238,6 +238,7 @@ static OPT_ATTRIBUTES_ONLY: &str = "attributes-only";
+ static OPT_BACKUP: &str = "backup";
+ static OPT_CLI_SYMBOLIC_LINKS: &str = "cli-symbolic-links";
+ static OPT_CONTEXT: &str = "context";
++static OPT_CONTEXT_DEFAULT: &str = "context-default";
+ static OPT_COPY_CONTENTS: &str = "copy-contents";
+ static OPT_DEREFERENCE: &str = "dereference";
+ static OPT_FORCE: &str = "force";
+@@ -450,6 +451,9 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
+              .long(OPT_CONTEXT)
+              .takes_value(true)
+              .value_name("CTX")
++             .help("NotImplemented: set the SELinux or SMACK security context to CTX"))
++        .arg(Arg::with_name(OPT_CONTEXT_DEFAULT)
++             .short("Z")
+              .help("NotImplemented: set SELinux security context of destination file to default type"))
+         .arg(Arg::with_name(OPT_CLI_SYMBOLIC_LINKS)
+              .short("H")
+diff --git a/src/uu/ls/src/ls.rs b/src/uu/ls/src/ls.rs
+index ece497b..c63a771 100644
+--- a/src/uu/ls/src/ls.rs
++++ b/src/uu/ls/src/ls.rs
+@@ -138,6 +138,7 @@ pub mod options {
+     pub static COLOR: &str = "color";
+     pub static PATHS: &str = "paths";
+     pub static INDICATOR_STYLE: &str = "indicator-style";
++    pub static CONTEXT: &str = "context";
+ }
+ 
+ #[derive(PartialEq, Eq)]
+@@ -884,6 +885,15 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
+                     options::INDICATOR_STYLE,
+                 ]))
+ 
++        // TODO: implement the following args
++        .arg(
++            Arg::with_name(options::CONTEXT)
++                .long(options::CONTEXT)
++                .short("Z")
++                .help("NotImplemented: print any security context of each file.")
++        )
++        // END TODO
++
+     // Positional arguments
+         .arg(Arg::with_name(options::PATHS).multiple(true).takes_value(true));
+ 
+diff --git a/src/uu/mv/src/mv.rs b/src/uu/mv/src/mv.rs
+index b481aee..4bcf19c 100644
+--- a/src/uu/mv/src/mv.rs
++++ b/src/uu/mv/src/mv.rs
+@@ -62,6 +62,7 @@ static OPT_TARGET_DIRECTORY: &str = "target-directory";
+ static OPT_NO_TARGET_DIRECTORY: &str = "no-target-directory";
+ static OPT_UPDATE: &str = "update";
+ static OPT_VERBOSE: &str = "verbose";
++static OPT_CONTEXT: &str = "context";
+ 
+ static ARG_FILES: &str = "files";
+ 
+@@ -164,6 +165,16 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
+             .min_values(2)
+             .required(true)
+         )
++
++    // TODO: implement the following args
++    .arg(
++            Arg::with_name(OPT_CONTEXT)
++            .short("Z")
++            .long(OPT_CONTEXT)
++            .help("NotImplemented: set SELinux security context of destination file to default type")
++    )
++    // END TODO
++
+     .get_matches_from(args);
+ 
+     let files: Vec<String> = matches
+--