v0.1.0

diff --git a/.gitignore b/.gitignore
new file mode 100644 (file)
index 0000000..ad67955
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,21 @@
+# Generated by Cargo
+# will have compiled files and executables
+debug
+target
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# Generated by cargo mutants
+# Contains mutation testing data
+**/mutants.out*/
+
+# RustRover
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/

diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644 (file)
index 0000000..7c572d6
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,487 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644 (file)
index 0000000..9f9ac9c
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "qotdd"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+chrono = "0.4.41"
+rand = "0.9.2"
+systemd = "0.10.1"

diff --git a/LICENSE b/LICENSE
new file mode 100644 (file)
index 0000000..e0292da
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,7 @@
+Copyright © 2025 Cameron Otsuka
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file

diff --git a/README.md b/README.md
new file mode 100644 (file)
index 0000000..b601f64
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# qotdd
\ No newline at end of file

diff --git a/aur/PKGBUILD b/aur/PKGBUILD
new file mode 100644 (file)
index 0000000..7af6ff3
--- /dev/null
+++ b/aur/PKGBUILD
@@ -0,0 +1,35 @@
+# Maintainer: Cameron Otsuka <cameron@otsuka.haus>
+# Contributor: Cameron Otsuka <cameron@otsuka.haus>
+pkgname=qotdd
+pkgver=0.1.0
+pkgrel=1
+pkgdesc='quote of the day daemon'
+url='https://github.com/cotsuka/qotdd'
+source=("$pkgname-$pkgver.tar.gz::$url/archive/v$pkgver.tar.gz")
+backup=("etc/qotdd/quotes.txt")
+arch=('x86_64')
+license=('MIT')
+makedepends=('cargo')
+sha256sums=('SKIP')
+
+prepare() {
+    cd "$pkgname-$pkgver"
+    cargo fetch --locked --target "$(rustc -vV | sed -n 's|host: ||p')"
+}
+
+build() {
+    cd "$srcdir/$pkgname-$pkgver"
+    cargo build --frozen --release --target-dir target
+}
+
+package() {
+    cd "$srcdir/$pkgname-$pkgver"
+
+    install -Dm755 "target/release/${pkgname}" "${pkgdir}/usr/bin/${pkgname}"
+    install -Dm644 "quotes.txt" "${pkgdir}/etc/${pkgname}/quotes.txt"
+
+    install -Dm644 "systemd/qotdd.service" "${pkgdir}/usr/lib/systemd/system/qotdd.service"
+    install -Dm644 "systemd/qotdd.socket" "${pkgdir}/usr/lib/systemd/system/qotdd.socket"
+
+    install -Dm644 LICENSE "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
+}
\ No newline at end of file

diff --git a/quotes.txt b/quotes.txt
new file mode 100644 (file)
index 0000000..57ba98b
--- /dev/null
+++ b/quotes.txt
@@ -0,0 +1,3 @@
+When words lose their meaning, people lose their freedom. — Confucius
+It is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner, but from their regard to their own interest. — Adam Smith
+Privacy is necessary for an open society in the electronic age. ... We cannot expect governments, corporations, or other large, faceless organizations to grant us privacy ... We must defend our own privacy if we expect to have any. ... Cypherpunks write code. We know that someone has to write software to defend privacy, and ... we're going to write it. — Eric Hughes
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diff --git a/src/main.rs b/src/main.rs
new file mode 100644 (file)
index 0000000..6e271f4
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,120 @@
+use chrono::prelude::*;
+use rand::prelude::*;
+use std::fs::File;
+use std::io::{BufRead, BufReader, Error, ErrorKind, Result, Write};
+use std::path::{Path, PathBuf};
+use std::net::{TcpListener, TcpStream};
+use std::os::fd::{FromRawFd, IntoRawFd};
+use std::sync::{Arc, Mutex};
+use std::thread;
+use systemd::daemon;
+
+struct CachedQuote {
+    date: NaiveDate,
+    quote: String,
+}
+
+#[derive(Clone)]
+struct QOTDDService {
+    quotes_file: PathBuf,
+    cached_quote: Arc<Mutex<Option<CachedQuote>>>,
+}
+
+impl QOTDDService {
+    fn new(quotes_file: &str) -> Result<Self> {
+        let path = PathBuf::from(quotes_file.to_string());
+        if !path.exists() {
+            return Err(Error::new(ErrorKind::NotFound, format!("quotes file not found: {:?}", path)));
+        }
+
+        Ok(Self {
+            quotes_file: path,
+            cached_quote: Arc::new(Mutex::new(None)),
+        })
+    }
+
+    fn get_quote(&self) -> Result<String> {
+        let now: DateTime<Local> = Local::now();
+        let today = now.date_naive();
+
+        // check cache
+        {
+            let cache_guard = self.cached_quote.lock().unwrap();
+            if let Some(ref cached) = *cache_guard {
+                if cached.date == today {
+                    return Ok(cached.quote.clone());
+                }
+            }
+        }
+
+        // cache miss: get a new quote
+        let quote = get_random_line(&self.quotes_file)?;
+        let new_cached_quote = CachedQuote {
+            date: today,
+            quote: quote.clone(),
+        };
+
+        // update cache
+        {
+            let mut cache_guard = self.cached_quote.lock().unwrap();
+            *cache_guard = Some(new_cached_quote);
+        }
+        
+        Ok(quote)
+    }
+}
+
+fn get_random_line(file_path: &Path) -> Result<String> {
+    let file = File::open(file_path)?;
+    let reader = BufReader::new(file);
+    let lines: Vec<String> = reader.lines().filter_map(|line| line.ok()).collect();
+    if lines.is_empty() {
+        return Err(Error::new(ErrorKind::NotFound, "no quotes found in file."));
+    }
+
+    let mut rng = rand::rng();
+    let random_index = rng.random_range(0..lines.len());
+    let quote = lines[random_index].clone() + "\n";
+    Ok(quote)
+}
+
+fn get_socket() -> Result<TcpListener> {
+    let fds = daemon::listen_fds(true)?;
+    if fds.len() != 1 {
+        return Err(Error::new(ErrorKind::InvalidInput, "expected exactly one socket file descriptor."));
+    }
+
+    let file = fds.iter().next().unwrap();
+    return Ok(unsafe {
+        TcpListener::from_raw_fd(file.into_raw_fd())
+    });
+}
+
+fn handle_connection(mut stream: TcpStream, service: &QOTDDService) -> Result<()> {
+    let quote = service.get_quote()?;
+    stream.write_all(quote.as_bytes())?;
+    stream.flush()?;
+    Ok(())
+}
+
+fn run(listener: TcpListener, service: QOTDDService) {
+    for stream in listener.incoming() {
+        match stream {
+            Ok(stream) => {
+                let cloned_service = service.clone();
+                thread::spawn(move || {
+                    if let Err(e) = handle_connection(stream, &cloned_service) {
+                        eprintln!("error handling tcp connection: {}", e);
+                    }
+                });
+            }
+            Err(e) => eprintln!("error accepting tcp connection: {}", e),
+        }
+    }
+}
+
+fn main() {
+    let listener = get_socket().unwrap();
+    let service = QOTDDService::new("/etc/qotdd/quotes.txt").unwrap();
+    run(listener, service);
+}
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diff --git a/systemd/qotdd.service b/systemd/qotdd.service
new file mode 100644 (file)
index 0000000..0b6f85b
--- /dev/null
+++ b/systemd/qotdd.service
@@ -0,0 +1,29 @@
+[Unit]
+Description=quote of the day daemon service
+Requires=qotdd.socket
+Wants=network-online.target
+After=network-online.target qotdd.socket
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/qotdd
+
+# Security hardening
+ProtectHome=yes
+PrivateDevices=yes
+NoNewPrivileges=yes
+MemoryDenyWriteExecute=yes
+LockPersonality=yes
+SystemCallFilter=@system-service
+RestrictAddressFamilies=AF_UNIX
+ProtectHostname=true
+RestrictRealtime=yes
+RestrictSUIDSGID=yes
+ProtectProc=invisible
+DynamicUser=yes
+ConfigurationDirectory=qotdd::ro
+Restart=on-failure
+RestartSec=5s
+
+[Install]
+WantedBy=multi-user.target
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diff --git a/systemd/qotdd.socket b/systemd/qotdd.socket
new file mode 100644 (file)
index 0000000..ed98e10
--- /dev/null
+++ b/systemd/qotdd.socket
@@ -0,0 +1,9 @@
+[Unit]
+Description=quote of the day daemon socket
+
+[Socket]
+ListenStream=17
+Accept=no
+
+[Install]
+WantedBy=sockets.target
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