feat(ui): add visual indication running as root (#57)

* Add visual indication running as root

* Fixing formatting

Co-authored-by: Chris Tomlinson <chris@c3st7n.net>

Cargo.lock

@@ -64,6 +64,11 @@ name = "cassowary"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "cc"
+version = "1.0.55"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "cfg-if"
 version = "0.1.10"
@@ -187,6 +192,7 @@ dependencies = [
  "filesize 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "insta 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "jwalk 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "signal-hook 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "structopt 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "termion 1.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -329,6 +335,18 @@ dependencies = [
  "adler32 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "nix"
+version = "0.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.55 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.71 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.13.0"
@@ -629,6 +647,11 @@ name = "version_check"
 version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "winapi"
 version = "0.3.8"
@@ -666,6 +689,7 @@ dependencies = [
 "checksum backtrace 0.3.49 (registry+https://github.com/rust-lang/crates.io-index)" = "05100821de9e028f12ae3d189176b41ee198341eb8f369956407fea2f5cc666c"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 "checksum cassowary 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "df8670b8c7b9dae1793364eafadf7239c40d669904660c5960d74cfd80b46a53"
+"checksum cc 1.0.55 (registry+https://github.com/rust-lang/crates.io-index)" = "b1be3409f94d7bdceeb5f5fac551039d9b3f00e25da7a74fc4d33400a0d96368"
 "checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 "checksum clap 2.33.1 (registry+https://github.com/rust-lang/crates.io-index)" = "bdfa80d47f954d53a35a64987ca1422f495b8d6483c0fe9f7117b36c2a792129"
 "checksum clicolors-control 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90082ee5dcdd64dc4e9e0d37fbf3ee325419e39c0092191e0393df65518f741e"
@@ -696,6 +720,7 @@ dependencies = [
 "checksum maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
 "checksum memoffset 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b4fc2c02a7e374099d4ee95a193111f72d2110197fe200272371758f6c3643d8"
 "checksum miniz_oxide 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "791daaae1ed6889560f8c4359194f56648355540573244a5448a83ba1ecc7435"
+"checksum nix 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "50e4785f2c3b7589a0d0c1dd60285e1188adac4006e8abd6dd578e1567027363"
 "checksum num_cpus 1.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
 "checksum numtoa 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
 "checksum object 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
@@ -732,6 +757,7 @@ dependencies = [
 "checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 "checksum vec_map 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 "checksum version_check 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
+"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

Cargo.toml

@@ -18,6 +18,7 @@ signal-hook = "0.1.10"
 structopt = "0.3"
 filesize = "0.2.0"
 unicode-width = "0.1.7"
+nix = "0.17.0"
 
 [dev-dependencies]
 insta = "0.16.0"

src/ui/title/title_line.rs

@@ -8,6 +8,8 @@ use crate::ui::format::DisplaySize;
 use crate::ui::title::{CellSizeOpt, TitleTelescope};
 use crate::ui::FolderInfo;
 
+use nix::unistd::geteuid;
+
 pub struct TitleLine<'a> {
     base_path_info: FolderInfo<'a>,
     current_path_info: FolderInfo<'a>,
@@ -126,6 +128,14 @@ impl<'a> Widget for TitleLine<'a> {
                 CellSizeOpt::new(" (errors)".to_string()).style(default_style.fg(Color::Red)),
             ]);
         }
+        if geteuid().is_root() {
+            title_telescope.append_to_left_side(vec![
+                CellSizeOpt::new(format!(" (CAUTION: running as root)"))
+                    .style(default_style.fg(Color::Red)),
+                CellSizeOpt::new(format!(" (running as root)")).style(default_style.fg(Color::Red)),
+                CellSizeOpt::new(" (root)".to_string()).style(default_style.fg(Color::Red)),
+            ]);
+        }
         title_telescope.append_to_right_side(vec![CellSizeOpt::new(base_path.to_string())]);
         if !current_path.is_empty() {
             title_telescope.append_to_right_side(vec![