uptime: tool unsupported on OpenBSD

- utmpx not supported on OpenBSD

  - add src/uu/uptime/src/platform directory and platform/mod.rs for conditional compilation
    according to target_os
  - platform/openbsd.rs: implementation on OpenBSD (unsupported tool)
  - platform/unix.rs: implementation on other OS
  - src/uu/uptime/src/uptime.rs: use platform module for uucore::main function

src/uu/uptime/src/platform/mod.rs

@@ -0,0 +1,14 @@
+// This file is part of the uutils coreutils package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+#[cfg(not(target_os = "openbsd"))]
+mod unix;
+#[cfg(not(target_os = "openbsd"))]
+pub use self::unix::*;
+
+#[cfg(target_os = "openbsd")]
+mod openbsd;
+#[cfg(target_os = "openbsd")]
+pub use self::openbsd::*;

src/uu/uptime/src/platform/openbsd.rs

@@ -0,0 +1,17 @@
+// This file is part of the uutils coreutils package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+// Specific implementation for OpenBSD: tool unsupported (utmpx not supported)
+
+use crate::uu_app;
+
+use uucore::error::UResult;
+
+pub fn uumain(args: impl uucore::Args) -> UResult<()> {
+    let _matches = uu_app().try_get_matches_from(args)?;
+
+    println!("unsupported command on OpenBSD");
+    Ok(())
+}

src/uu/uptime/src/platform/unix.rs

@@ -0,0 +1,161 @@
+// This file is part of the uutils coreutils package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+// spell-checker:ignore (ToDO) getloadavg upsecs updays nusers loadavg boottime uphours upmins
+
+use crate::options;
+use crate::uu_app;
+
+use chrono::{Local, TimeZone, Utc};
+
+use uucore::libc::time_t;
+
+use uucore::error::{UResult, USimpleError};
+
+#[cfg(unix)]
+use uucore::libc::getloadavg;
+
+#[cfg(windows)]
+extern "C" {
+    fn GetTickCount() -> uucore::libc::uint32_t;
+}
+
+pub fn uumain(args: impl uucore::Args) -> UResult<()> {
+    let matches = uu_app().try_get_matches_from(args)?;
+
+    let (boot_time, user_count) = process_utmpx();
+    let uptime = get_uptime(boot_time);
+    if uptime < 0 {
+        Err(USimpleError::new(1, "could not retrieve system uptime"))
+    } else {
+        if matches.get_flag(options::SINCE) {
+            let initial_date = Local
+                .timestamp_opt(Utc::now().timestamp() - uptime, 0)
+                .unwrap();
+            println!("{}", initial_date.format("%Y-%m-%d %H:%M:%S"));
+            return Ok(());
+        }
+
+        print_time();
+        let upsecs = uptime;
+        print_uptime(upsecs);
+        print_nusers(user_count);
+        print_loadavg();
+
+        Ok(())
+    }
+}
+
+#[cfg(unix)]
+fn print_loadavg() {
+    use uucore::libc::c_double;
+
+    let mut avg: [c_double; 3] = [0.0; 3];
+    let loads: i32 = unsafe { getloadavg(avg.as_mut_ptr(), 3) };
+
+    if loads == -1 {
+        println!();
+    } else {
+        print!("load average: ");
+        for n in 0..loads {
+            print!(
+                "{:.2}{}",
+                avg[n as usize],
+                if n == loads - 1 { "\n" } else { ", " }
+            );
+        }
+    }
+}
+
+#[cfg(windows)]
+fn print_loadavg() {
+    // XXX: currently this is a noop as Windows does not seem to have anything comparable to
+    //      getloadavg()
+}
+
+#[cfg(unix)]
+fn process_utmpx() -> (Option<time_t>, usize) {
+    use uucore::utmpx::*;
+
+    let mut nusers = 0;
+    let mut boot_time = None;
+
+    for line in Utmpx::iter_all_records() {
+        match line.record_type() {
+            USER_PROCESS => nusers += 1,
+            BOOT_TIME => {
+                let dt = line.login_time();
+                if dt.unix_timestamp() > 0 {
+                    boot_time = Some(dt.unix_timestamp() as time_t);
+                }
+            }
+            _ => continue,
+        }
+    }
+    (boot_time, nusers)
+}
+
+#[cfg(windows)]
+fn process_utmpx() -> (Option<time_t>, usize) {
+    (None, 0) // TODO: change 0 to number of users
+}
+
+fn print_nusers(nusers: usize) {
+    match nusers.cmp(&1) {
+        std::cmp::Ordering::Equal => print!("1 user,  "),
+        std::cmp::Ordering::Greater => print!("{nusers} users,  "),
+        _ => {}
+    };
+}
+
+fn print_time() {
+    let local_time = Local::now().time();
+
+    print!(" {} ", local_time.format("%H:%M:%S"));
+}
+
+#[cfg(unix)]
+fn get_uptime(boot_time: Option<time_t>) -> i64 {
+    use std::fs::File;
+    use std::io::Read;
+
+    let mut proc_uptime_s = String::new();
+
+    let proc_uptime = File::open("/proc/uptime")
+        .ok()
+        .and_then(|mut f| f.read_to_string(&mut proc_uptime_s).ok())
+        .and_then(|_| proc_uptime_s.split_whitespace().next())
+        .and_then(|s| s.split('.').next().unwrap_or("0").parse().ok());
+
+    proc_uptime.unwrap_or_else(|| match boot_time {
+        Some(t) => {
+            let now = Local::now().timestamp();
+            #[cfg(target_pointer_width = "64")]
+            let boottime: i64 = t;
+            #[cfg(not(target_pointer_width = "64"))]
+            let boottime: i64 = t.into();
+            now - boottime
+        }
+        None => -1,
+    })
+}
+
+#[cfg(windows)]
+fn get_uptime(_boot_time: Option<time_t>) -> i64 {
+    unsafe { GetTickCount() as i64 }
+}
+
+fn print_uptime(upsecs: i64) {
+    let updays = upsecs / 86400;
+    let uphours = (upsecs - (updays * 86400)) / 3600;
+    let upmins = (upsecs - (updays * 86400) - (uphours * 3600)) / 60;
+    match updays.cmp(&1) {
+        std::cmp::Ordering::Equal => print!("up {updays:1} day, {uphours:2}:{upmins:02},  "),
+        std::cmp::Ordering::Greater => {
+            print!("up {updays:1} days, {uphours:2}:{upmins:02},  ");
+        }
+        _ => print!("up  {uphours:2}:{upmins:02}, "),
+    };
+}

src/uu/uptime/src/uptime.rs

@@ -3,15 +3,11 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-// spell-checker:ignore (ToDO) getloadavg upsecs updays nusers loadavg boottime uphours upmins
-
-use chrono::{Local, TimeZone, Utc};
 use clap::{crate_version, Arg, ArgAction, Command};
 
-use uucore::libc::time_t;
 use uucore::{format_usage, help_about, help_usage};
 
-use uucore::error::{UResult, USimpleError};
+mod platform;
 
 const ABOUT: &str = help_about!("uptime.md");
 const USAGE: &str = help_usage!("uptime.md");
@@ -19,40 +15,8 @@ pub mod options {
     pub static SINCE: &str = "since";
 }
 
-#[cfg(unix)]
-use uucore::libc::getloadavg;
-
-#[cfg(windows)]
-extern "C" {
-    fn GetTickCount() -> uucore::libc::uint32_t;
-}
-
 #[uucore::main]
-pub fn uumain(args: impl uucore::Args) -> UResult<()> {
-    let matches = uu_app().try_get_matches_from(args)?;
-
-    let (boot_time, user_count) = process_utmpx();
-    let uptime = get_uptime(boot_time);
-    if uptime < 0 {
-        Err(USimpleError::new(1, "could not retrieve system uptime"))
-    } else {
-        if matches.get_flag(options::SINCE) {
-            let initial_date = Local
-                .timestamp_opt(Utc::now().timestamp() - uptime, 0)
-                .unwrap();
-            println!("{}", initial_date.format("%Y-%m-%d %H:%M:%S"));
-            return Ok(());
-        }
-
-        print_time();
-        let upsecs = uptime;
-        print_uptime(upsecs);
-        print_nusers(user_count);
-        print_loadavg();
-
-        Ok(())
-    }
-}
+use platform::uumain;
 
 pub fn uu_app() -> Command {
     Command::new(uucore::util_name())
@@ -68,115 +32,3 @@ pub fn uu_app() -> Command {
                 .action(ArgAction::SetTrue),
         )
 }
-
-#[cfg(unix)]
-fn print_loadavg() {
-    use uucore::libc::c_double;
-
-    let mut avg: [c_double; 3] = [0.0; 3];
-    let loads: i32 = unsafe { getloadavg(avg.as_mut_ptr(), 3) };
-
-    if loads == -1 {
-        println!();
-    } else {
-        print!("load average: ");
-        for n in 0..loads {
-            print!(
-                "{:.2}{}",
-                avg[n as usize],
-                if n == loads - 1 { "\n" } else { ", " }
-            );
-        }
-    }
-}
-
-#[cfg(windows)]
-fn print_loadavg() {
-    // XXX: currently this is a noop as Windows does not seem to have anything comparable to
-    //      getloadavg()
-}
-
-#[cfg(unix)]
-fn process_utmpx() -> (Option<time_t>, usize) {
-    use uucore::utmpx::*;
-
-    let mut nusers = 0;
-    let mut boot_time = None;
-
-    for line in Utmpx::iter_all_records() {
-        match line.record_type() {
-            USER_PROCESS => nusers += 1,
-            BOOT_TIME => {
-                let dt = line.login_time();
-                if dt.unix_timestamp() > 0 {
-                    boot_time = Some(dt.unix_timestamp() as time_t);
-                }
-            }
-            _ => continue,
-        }
-    }
-    (boot_time, nusers)
-}
-
-#[cfg(windows)]
-fn process_utmpx() -> (Option<time_t>, usize) {
-    (None, 0) // TODO: change 0 to number of users
-}
-
-fn print_nusers(nusers: usize) {
-    match nusers.cmp(&1) {
-        std::cmp::Ordering::Equal => print!("1 user,  "),
-        std::cmp::Ordering::Greater => print!("{nusers} users,  "),
-        _ => {}
-    };
-}
-
-fn print_time() {
-    let local_time = Local::now().time();
-
-    print!(" {} ", local_time.format("%H:%M:%S"));
-}
-
-#[cfg(unix)]
-fn get_uptime(boot_time: Option<time_t>) -> i64 {
-    use std::fs::File;
-    use std::io::Read;
-
-    let mut proc_uptime_s = String::new();
-
-    let proc_uptime = File::open("/proc/uptime")
-        .ok()
-        .and_then(|mut f| f.read_to_string(&mut proc_uptime_s).ok())
-        .and_then(|_| proc_uptime_s.split_whitespace().next())
-        .and_then(|s| s.split('.').next().unwrap_or("0").parse().ok());
-
-    proc_uptime.unwrap_or_else(|| match boot_time {
-        Some(t) => {
-            let now = Local::now().timestamp();
-            #[cfg(target_pointer_width = "64")]
-            let boottime: i64 = t;
-            #[cfg(not(target_pointer_width = "64"))]
-            let boottime: i64 = t.into();
-            now - boottime
-        }
-        None => -1,
-    })
-}
-
-#[cfg(windows)]
-fn get_uptime(_boot_time: Option<time_t>) -> i64 {
-    unsafe { GetTickCount() as i64 }
-}
-
-fn print_uptime(upsecs: i64) {
-    let updays = upsecs / 86400;
-    let uphours = (upsecs - (updays * 86400)) / 3600;
-    let upmins = (upsecs - (updays * 86400) - (uphours * 3600)) / 60;
-    match updays.cmp(&1) {
-        std::cmp::Ordering::Equal => print!("up {updays:1} day, {uphours:2}:{upmins:02},  "),
-        std::cmp::Ordering::Greater => {
-            print!("up {updays:1} days, {uphours:2}:{upmins:02},  ");
-        }
-        _ => print!("up  {uphours:2}:{upmins:02}, "),
-    };
-}