pinky: add --lookup flag

src/uu/pinky/locales/en-US.ftl

@@ -19,6 +19,7 @@ pinky-help-omit-headings = omit the line of column headings in short format
 pinky-help-omit-name = omit the user's full name in short format
 pinky-help-omit-name-host = omit the user's full name and remote host in short format
 pinky-help-omit-name-host-time = omit the user's full name, remote host and idle time in short format
+pinky-help-lookup = attempt to canonicalize hostnames via DNS
 pinky-help-help = Print help information
 
 # Column headers for short format

src/uu/pinky/locales/fr-FR.ftl

@@ -19,6 +19,7 @@ pinky-help-omit-headings = omettre la ligne des en-têtes de colonnes en format
 pinky-help-omit-name = omettre le nom complet de l'utilisateur en format court
 pinky-help-omit-name-host = omettre le nom complet et l'hôte distant de l'utilisateur en format court
 pinky-help-omit-name-host-time = omettre le nom complet, l'hôte distant et le temps d'inactivité de l'utilisateur en format court
+pinky-help-lookup = tenter de donner un forme canonique aux noms d'hôte avec DNS
 pinky-help-help = Afficher les informations d'aide
 
 # En-têtes de colonnes pour le format court

src/uu/pinky/src/pinky.rs

@@ -13,6 +13,7 @@ mod platform;
 
 mod options {
     pub const LONG_FORMAT: &str = "long_format";
+    pub const LOOKUP: &str = "lookup";
     pub const OMIT_HOME_DIR: &str = "omit_home_dir";
     pub const OMIT_PROJECT_FILE: &str = "omit_project_file";
     pub const OMIT_PLAN_FILE: &str = "omit_plan_file";
@@ -101,6 +102,12 @@ pub fn uu_app() -> Command {
                 .action(ArgAction::Append)
                 .value_hint(clap::ValueHint::Username),
         )
+        .arg(
+            Arg::new(options::LOOKUP)
+                .long(options::LOOKUP)
+                .help(translate!("pinky-help-lookup"))
+                .action(ArgAction::SetTrue),
+        )
         .arg(
             // Redefine the help argument to not include the short flag
             // since that conflicts with omit_project_file.

src/uu/pinky/src/platform/unix.rs

@@ -64,6 +64,9 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     // if true, use the "short" output format.
     let do_short_format = !matches.get_flag(options::LONG_FORMAT);
 
+    // If true, attempt to canonicalize hostname via a DNS lookup.
+    let do_lookup = matches.get_flag(options::LOOKUP);
+
     /* if true, display the ut_host field. */
     let mut include_where = true;
 
@@ -81,6 +84,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     }
 
     let pk = Pinky {
+        do_lookup,
         include_idle,
         include_heading,
         include_fullname,
@@ -103,6 +107,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 }
 
 struct Pinky {
+    do_lookup: bool,
     include_idle: bool,
     include_heading: bool,
     include_fullname: bool,
@@ -206,10 +211,16 @@ impl Pinky {
 
         print!(" {}", time_string(ut));
 
-        let mut s = ut.host();
-        if self.include_where && !s.is_empty() {
-            s = ut.canon_host()?;
-            print!(" {s}");
+        if self.include_where {
+            let s: String = if self.do_lookup {
+                ut.canon_host().unwrap_or(ut.host())
+            } else {
+                ut.host()
+            };
+
+            if !s.is_empty() {
+                print!(" {s}");
+            }
         }
 
         println!();