feat: use /run/user to store socket and pid file

Cargo.lock

@@ -621,9 +621,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.146"
+version = "0.2.147"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f92be4933c13fd498862a9e02a3055f8a8d9c039ce33db97306fd5a6caa7f29b"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
 
 [[package]]
 name = "linux-raw-sys"
@@ -1134,6 +1134,7 @@ dependencies = [
  "clap",
  "daemonize",
  "humantime",
+ "libc",
  "notify-rust",
  "serde",
  "serde_cbor",

Cargo.toml

@@ -10,6 +10,7 @@ anyhow = "1.0.71"
 clap = { version = "4.3.4", features = ["derive"] }
 daemonize = "0.5.0"
 humantime = "2.1.0"
+libc = "0.2.147"
 notify-rust = "4.8.0"
 serde = { version = "1.0.164", features = ["derive"] }
 serde_cbor = "0.11.2"

src/cli.rs

@@ -1,4 +1,5 @@
 use crate::daemon::{Answer, AnswerErr, Command as OtherCommand};
+use crate::run_path;
 use anyhow::{Context, Result};
 use clap::{Parser, Subcommand};
 use std::net::Shutdown;
@@ -12,7 +13,7 @@ pub struct Cli {
     #[command(subcommand)]
     pub command: Command,
     #[arg(short, long)]
-    #[clap(default_value = "/tmp/timers.socket")]
+    #[clap(default_value_t = format!("{}/timers.socket", run_path()))]
     pub socket: String,
 }
 

src/helper.rs

@@ -0,0 +1,7 @@
+pub fn getuid() -> u32 {
+    unsafe { libc::getuid() }
+}
+
+pub fn run_path() -> String {
+    format!("/run/user/{}", getuid())
+}

src/main.rs

@@ -1,11 +1,14 @@
 mod cli;
 mod daemon;
+mod helper;
 mod notification;
 mod pomodoro;
 mod timer;
 
+use crate::helper::getuid;
 use crate::cli::{send_command, Cli, Command as CliCommand};
 use crate::daemon::{Command as DaemonCommand, Daemon};
+use crate::helper::run_path;
 use clap::Parser;
 use cli::PomodoroCommand;
 
@@ -13,7 +16,10 @@ fn main() -> Result<(), anyhow::Error> {
     let args = Cli::parse();
     let daemon_command = match args.command {
         CliCommand::Daemon { no_notify } => {
-            daemonize::Daemonize::new().start()?;
+            daemonize::Daemonize::new()
+                .pid_file(format!("{}/timers.pid", run_path()))
+                .user(getuid())
+                .start()?;
             return Daemon::new(args.socket, no_notify)?.run();
         }
         CliCommand::Add { name, duration } => {