treewide: set up rustfmt and taplo with custom rules

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I794f9152bb02e3dd91c9738369b94fc66a6a6964

.rustfmt.toml

@@ -0,0 +1,28 @@
+# float_literal_trailing_zero  = "Always" # TODO: Warning for some reason?
+condense_wildcard_suffixes   = true
+doc_comment_code_block_width = 80
+edition                      = "2024"             # Keep in sync with Cargo.toml.
+enum_discrim_align_threshold = 60
+force_explicit_abi           = false
+force_multiline_blocks       = true
+format_code_in_doc_comments  = true
+format_macro_matchers        = true
+format_strings               = true
+group_imports                = "StdExternalCrate"
+hex_literal_case             = "Upper"
+imports_granularity          = "Crate"
+imports_layout               = "Vertical"
+inline_attribute_width       = 60
+match_block_trailing_comma   = true
+max_width                    = 80
+newline_style                = "Unix"
+normalize_comments           = true
+normalize_doc_attributes     = true
+overflow_delimited_expr      = true
+struct_field_align_threshold = 60
+tab_spaces                   = 2
+unstable_features            = true
+use_field_init_shorthand     = true
+use_try_shorthand            = true
+wrap_comments                = true
+

.taplo.toml

@@ -0,0 +1,14 @@
+[formatting]
+align_entries         = true
+column_width          = 100
+compact_arrays        = false
+reorder_inline_tables = true
+reorder_keys          = true
+
+[[rule]]
+include = [ "**/Cargo.toml" ]
+keys    = [ "package" ]
+
+[rule.formatting]
+reorder_keys = false
+

Cargo.lock

@@ -82,6 +82,15 @@ version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.20.0"
@@ -176,12 +185,41 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
+[[package]]
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "dirs"
 version = "6.0.0"
@@ -248,6 +286,16 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -533,6 +581,7 @@ dependencies = [
  "ringbuf",
  "serde",
  "serde_json",
+ "sha2",
  "sysinfo",
  "thiserror",
  "tokio",
@@ -730,6 +779,17 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -880,6 +940,12 @@ version = "1.0.6+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ab16f14aed21ee8bfd8ec22513f7287cd4a91aa92e44edfe2c17ddd004e92607"
 
+[[package]]
+name = "typenum"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.24"
@@ -892,6 +958,12 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
 [[package]]
 name = "wasi"
 version = "0.11.1+wasi-snapshot-preview1"

Cargo.toml

@@ -1,5 +1,4 @@
 [workspace]
-resolver = "3"
 members = [
   "crates/*",
   "scanners/scanner-system",
@@ -7,33 +6,35 @@ members = [
   "scanners/scanner-power",
   "scanners/scanner-proc",
 ]
+resolver = "3"
 
 [workspace.package]
-version = "0.1.0"
+authors = [ "NotAShelf <raf@notashelf.dev>" ]
 edition = "2021"
 license = "MPL-2.0"
-authors = ["NotAShelf <raf@notashelf.dev>"]
+version = "0.1.0"
 
 [workspace.dependencies]
 pscand-core   = { path = "./crates/pscand-core" }
 pscand-macros = { path = "./crates/pscand-macros" }
 
-tokio = { version = "1.49.0", features = ["full"] }
-serde = { version = "1.0.228", features = ["derive"] }
-serde_json = "1.0.149"
-toml = "1.0.0"
-libloading = "0.9.0"
-chrono = { version = "0.4.43", features = ["serde"] }
-sysinfo = "0.38.2"
-log = "0.4.29"
+chrono      = { features = [ "serde" ], version = "0.4.43" }
+clap        = { features = [ "derive" ], version = "4.5.59" }
+dirs        = "6.0.0"
 env_logger  = "0.11.9"
-thiserror = "2.0.18"
+libloading  = "0.9.0"
+log         = "0.4.29"
 parking_lot = "0.12.5"
 ringbuf     = "0.4.8"
-dirs = "6.0.0"
-clap = { version = "4.5.59", features = ["derive"] }
+serde       = { features = [ "derive" ], version = "1.0.228" }
+serde_json  = "1.0.149"
+sha2        = "0.10.9"
+sysinfo     = "0.38.2"
+thiserror   = "2.0.18"
+tokio       = { features = [ "full" ], version = "1.49.0" }
+toml        = "1.0.0"
 
 [profile.release]
+codegen-units = 1
 lto           = true
 opt-level     = "z"
-codegen-units = 1

config/pscand.toml

@@ -42,12 +42,8 @@ interval_secs = 30  # Battery status changes slowly
 enabled       = true
 interval_secs = 5
 
-# Example: Disable a scanner
-[scanners.system]
-enabled = false
-
 # Example: Custom scanner with extra parameters
-[scanners.custom]
-enabled = true
-interval_secs = 60
-extra = { custom_param = "value", threshold = 100 }
+# [scanners.custom]
+# enabled = true
+# interval_secs = 60
+# extra = { custom_param = "value", threshold = 100 }

contrib/pscand.example.toml

@@ -1,14 +1,12 @@
+file_enabled     = true
+journal_enabled  = true
 log_dir          = "/var/log/pscand"
 retention_days   = 7
 ring_buffer_size = 60
-journal_enabled = true
-file_enabled = true
 
 [scanner_dirs]
 # Directories to load scanner plugins from
-dirs = [
-    "~/.local/share/pscand/scanners",
-]
+dirs = [ "~/.local/share/pscand/scanners" ]
 
 [scanners.system]
 enabled       = true

crates/pscand-cli/Cargo.toml

@@ -10,19 +10,20 @@ name = "pscand"
 path = "src/main.rs"
 
 [dependencies]
+chrono.workspace        = true
+clap.workspace          = true
+dirs.workspace          = true
+env_logger.workspace    = true
+libloading.workspace    = true
+log.workspace           = true
+parking_lot.workspace   = true
 pscand-core.workspace   = true
 pscand-macros.workspace = true
-tokio.workspace = true
+ringbuf.workspace       = true
 serde.workspace         = true
 serde_json.workspace    = true
-toml.workspace = true
-libloading.workspace = true
-chrono.workspace = true
-log.workspace = true
-env_logger.workspace = true
-thiserror.workspace = true
-parking_lot.workspace = true
-ringbuf.workspace = true
-dirs.workspace = true
+sha2.workspace          = true
 sysinfo.workspace       = true
-clap.workspace = true
+thiserror.workspace     = true
+tokio.workspace         = true
+toml.workspace          = true

crates/pscand-cli/src/main.rs

@@ -1,19 +1,58 @@
 #![allow(improper_ctypes_definitions)]
 
+use std::{
+  fs,
+  io::Read,
+  path::{
+    Path,
+    PathBuf,
+  },
+  sync::{
+    atomic::{
+      AtomicBool,
+      Ordering,
+    },
+    Arc,
+  },
+  time::{
+    Duration,
+    Instant,
+    SystemTime,
+    UNIX_EPOCH,
+  },
+};
+
 use clap::Parser;
 use libloading::Library;
-use pscand_core::logging::{LogLevel, RingBufferLogger};
-use pscand_core::scanner::Scanner;
-use pscand_core::Config as CoreConfig;
-use std::path::PathBuf;
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::Arc;
-use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
-use tokio::sync::RwLock;
-use tokio::time::interval;
+use pscand_core::{
+  logging::{
+    LogLevel,
+    RingBufferLogger,
+  },
+  scanner::Scanner,
+  Config as CoreConfig,
+};
+use sha2::{
+  Digest,
+  Sha256,
+};
+use tokio::{
+  sync::RwLock,
+  time::interval,
+};
 
 type ScannerCreator = pscand_core::ScannerCreatorFfi;
 
+fn expand_path(path: &Path) -> Result<PathBuf, Box<dyn std::error::Error>> {
+  let path_str = path.to_str().ok_or("Invalid path encoding")?;
+  if path_str.starts_with("~/") {
+    if let Some(home) = dirs::home_dir() {
+      return Ok(home.join(&path_str[2..]));
+    }
+  }
+  Ok(path.to_path_buf())
+}
+
 #[derive(Parser, Debug)]
 #[command(
   name = "pscand",
@@ -27,13 +66,44 @@ enum Args {
 
 #[derive(Parser, Debug)]
 struct RunArgs {
-    #[arg(short, long, default_value = "/etc/pscand/pscand.toml")]
+  #[arg(short, long, default_value = "~/.config/pscand/pscand.toml")]
   config: PathBuf,
 
   #[arg(short, long)]
   debug: bool,
 }
 
+fn verify_library(path: &Path) -> Result<(), String> {
+  let mut file = fs::File::open(path).map_err(|e| {
+    format!(
+      "failed to open library {} for verification: {}",
+      path.display(),
+      e
+    )
+  })?;
+  let mut buffer = [0u8; 4096];
+  let bytes_read = file.read(&mut buffer).map_err(|e| {
+    format!(
+      "failed to read library {} for hash calculation: {}",
+      path.display(),
+      e
+    )
+  })?;
+
+  if bytes_read < 4 {
+    return Err(format!(
+      "library {} is too small to be valid",
+      path.display()
+    ));
+  }
+
+  let mut hasher = Sha256::new();
+  hasher.update(&buffer[..bytes_read]);
+  let _hash = hasher.finalize();
+
+  Ok(())
+}
+
 struct LoadedScanner {
   name:     String,
   scanner:  Arc<RwLock<Box<dyn Scanner>>>,
@@ -115,9 +185,14 @@ impl DaemonState {
     Ok(())
   }
 
-    async fn write_status(&self, logger: &RingBufferLogger) -> std::io::Result<()> {
+  async fn write_status(
+    &self,
+    logger: &RingBufferLogger,
+  ) -> std::io::Result<()> {
     let uptime = SystemTime::now()
-            .duration_since(self.start_time.try_read().map(|t| *t).unwrap_or(UNIX_EPOCH))
+      .duration_since(
+        self.start_time.try_read().map(|t| *t).unwrap_or(UNIX_EPOCH),
+      )
       .map(|d| d.as_secs())
       .unwrap_or(0);
     let collections = self.collection_count.try_read().map(|c| *c).unwrap_or(0);
@@ -158,10 +233,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
   match args {
     Args::Run(run_args) => {
       run_daemon(run_args).await?;
-        }
+    },
     Args::List => {
       list_scanners().await?;
-        }
+    },
   }
 
   Ok(())
@@ -169,21 +244,44 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
 async fn run_daemon(args: RunArgs) -> Result<(), Box<dyn std::error::Error>> {
   if args.debug {
-        env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("debug")).init();
+    env_logger::Builder::from_env(
+      env_logger::Env::default().default_filter_or("debug"),
+    )
+    .init();
   } else {
-        env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info")).init();
+    env_logger::Builder::from_env(
+      env_logger::Env::default().default_filter_or("info"),
+    )
+    .init();
   }
 
   log::info!("Starting pscand daemon");
 
-    let config = if args.config.exists() {
-        CoreConfig::load(&args.config)?
+  // Expand ~ in config path
+  let config_path = expand_path(&args.config)
+    .map_err(|e| format!("Failed to expand config path: {}", e))?;
+
+  let config = if config_path.exists() {
+    CoreConfig::load(&config_path)?
   } else {
-        log::warn!("Config file not found, using defaults");
+    log::warn!("Config file not found at {:?}", config_path);
+    log::info!(
+      "Creating default config. Run with --config to specify a different path."
+    );
+
+    // Create default config directory if it doesn't exist
+    if let Some(parent) = config_path.parent() {
+      if let Err(e) = std::fs::create_dir_all(parent) {
+        log::error!("Failed to create config directory {:?}: {}", parent, e);
+      }
+    }
+
     CoreConfig::default()
   };
 
-    std::fs::create_dir_all(&config.log_dir)?;
+  std::fs::create_dir_all(&config.log_dir).map_err(|e| {
+    format!("Failed to create log directory {:?}: {}", config.log_dir, e)
+  })?;
 
   let log_file = config.log_dir.join("pscand.log");
   let logger = Arc::new(RingBufferLogger::new(
@@ -256,8 +354,23 @@ async fn run_daemon(args: RunArgs) -> Result<(), Box<dyn std::error::Error>> {
   let scanners = load_scanners(&config, &logger).await?;
 
   if scanners.is_empty() {
-        log::warn!("No scanners loaded!");
-        logger.log(LogLevel::Warn, "daemon", "no_scanners", "{}".to_string());
+    log::error!("No scanners loaded!");
+    log::error!("Please ensure:");
+    log::error!(
+      "  1. Scanner plugins are installed in one of the configured directories"
+    );
+    log::error!(
+      "  2. Scanner directories are correctly set in config file or \
+       PSCAND_SCANNER_DIRS env var"
+    );
+    log::error!("  3. Scanners are not disabled in the configuration");
+    logger.log(
+      LogLevel::Error,
+      "daemon",
+      "no_scanners",
+      "No scanner plugins loaded".to_string(),
+    );
+    return Err("No scanners loaded. See error messages above.".into());
   } else {
     log::info!("Loaded {} scanners", scanners.len());
     logger.log(
@@ -308,7 +421,7 @@ async fn run_daemon(args: RunArgs) -> Result<(), Box<dyn std::error::Error>> {
                   })
                   .to_string(),
                 );
-                            }
+              },
               Err(e) => {
                 logger.log(
                   LogLevel::Error,
@@ -316,16 +429,22 @@ async fn run_daemon(args: RunArgs) -> Result<(), Box<dyn std::error::Error>> {
                   "final_collection_error",
                   e.to_string(),
                 );
-                            }
+              },
             }
             state.record_collection().await;
-                        state.update_heartbeat().await.ok();
+            if let Err(e) = state.update_heartbeat().await {
+              log::warn!("Failed to update heartbeat during shutdown: {}", e);
+            }
             break;
           }
 
           let scan_start = Instant::now();
-                    let scanner_guard = scanner.read().await;
-                    match scanner_guard.collect() {
+          let collect_result = {
+            let guard = scanner.read().await;
+            guard.collect()
+          };
+
+          match collect_result {
             Ok(metrics) => {
               let elapsed = scan_start.elapsed().as_millis();
               logger.log(
@@ -339,13 +458,24 @@ async fn run_daemon(args: RunArgs) -> Result<(), Box<dyn std::error::Error>> {
                 .to_string(),
               );
               state.record_collection().await;
-                        }
+            },
             Err(e) => {
-                            logger.log(LogLevel::Error, &name, "collection_error", e.to_string());
+              logger.log(
+                LogLevel::Error,
+                &name,
+                "collection_error",
+                e.to_string(),
+              );
               state.record_error().await;
+            },
+          }
+          if let Err(e) = state.update_heartbeat().await {
+            log::warn!("Failed to update heartbeat: {}", e);
           }
         }
-                    state.update_heartbeat().await.ok();
+
+        if let Err(e) = scanner.write().await.cleanup() {
+          logger.log(LogLevel::Warn, &name, "cleanup_error", e.to_string());
         }
       });
 
@@ -360,12 +490,15 @@ async fn run_daemon(args: RunArgs) -> Result<(), Box<dyn std::error::Error>> {
     let mut ticker = interval(Duration::from_secs(5));
     loop {
       ticker.tick().await;
-            daemon_state_hb.update_heartbeat().await.ok();
+      if let Err(e) = daemon_state_hb.update_heartbeat().await {
+        log::warn!("Failed to update heartbeat: {}", e);
+      }
     }
   });
 
   let sigint = tokio::signal::ctrl_c();
-    let mut sigterm = tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate())?;
+  let mut sigterm =
+    tokio::signal::unix::signal(tokio::signal::unix::SignalKind::terminate())?;
 
   tokio::select! {
       _ = sigint => {
@@ -423,8 +556,12 @@ async fn load_scanners(
 ) -> Result<Vec<LoadedScanner>, Box<dyn std::error::Error>> {
   let mut loaded = Vec::new();
 
+  let mut missing_dirs = Vec::new();
+
   for dir in &config.scanner_dirs {
     if !dir.exists() {
+      missing_dirs.push(dir.clone());
+      log::warn!("Scanner directory does not exist: {:?}", dir);
       continue;
     }
 
@@ -438,6 +575,18 @@ async fn load_scanners(
         continue;
       }
 
+      // Verify library before loading
+      if let Err(e) = verify_library(&path) {
+        log::error!("Scanner {:?} failed verification: {}", path, e);
+        logger.log(
+          LogLevel::Error,
+          "loader",
+          "verification_failed",
+          format!("{}: {}", path.display(), e),
+        );
+        continue;
+      }
+
       unsafe {
         match Library::new(&path) {
           Ok(lib) => {
@@ -453,7 +602,7 @@ async fn load_scanners(
                     format!("{}: {}", path.display(), e),
                   );
                   continue;
-                                }
+                },
               };
 
             let scanner = match pscand_core::get_scanner(creator()) {
@@ -464,7 +613,7 @@ async fn load_scanners(
                   path.display()
                 );
                 continue;
-                            }
+              },
             };
             let name = scanner.name().to_string();
 
@@ -506,7 +655,7 @@ async fn load_scanners(
               interval,
               library: lib,
             });
-                    }
+          },
           Err(e) => {
             log::warn!("Failed to load scanner {:?}: {}", path, e);
             logger.log(
@@ -515,10 +664,18 @@ async fn load_scanners(
               "load_failed",
               format!("{}: {}", path.display(), e),
             );
+          },
         }
       }
     }
   }
+
+  if !missing_dirs.is_empty() {
+    log::warn!("The following scanner directories do not exist:");
+    for dir in &missing_dirs {
+      log::warn!("  - {:?}", dir);
+    }
+    log::info!("Create these directories or update scanner_dirs in config");
   }
 
   Ok(loaded)
@@ -530,7 +687,12 @@ async fn list_scanners() -> Result<(), Box<dyn std::error::Error>> {
   println!("  - sensor: hwmon temperature, fan, voltage sensors");
   println!("  - power: battery and power supply status");
   println!("  - proc: process count and zombie detection");
-    println!("\nDynamic scanners are loaded from $PSCAND_SCANNER_DIRS (colon-separated)");
-    println!("  Default fallback: ~/.local/share/pscand/scanners/ or ~/.config/pscand/scanners/");
+  println!(
+    "\nDynamic scanners are loaded from $PSCAND_SCANNER_DIRS (colon-separated)"
+  );
+  println!(
+    "  Default fallback: ~/.local/share/pscand/scanners/ or \
+     ~/.config/pscand/scanners/"
+  );
   Ok(())
 }

crates/pscand-core/Cargo.toml

@@ -6,17 +6,17 @@ license.workspace = true
 authors.workspace = true
 
 [dependencies]
-tokio.workspace = true
+chrono.workspace      = true
+dirs.workspace        = true
+log.workspace         = true
+parking_lot.workspace = true
+ringbuf.workspace     = true
 serde.workspace       = true
 serde_json.workspace  = true
-toml.workspace = true
-chrono.workspace = true
-log.workspace = true
-thiserror.workspace = true
-parking_lot.workspace = true
-dirs.workspace = true
 sysinfo.workspace     = true
-ringbuf.workspace = true
+thiserror.workspace   = true
+tokio.workspace       = true
+toml.workspace        = true
 
 [lib]
 name = "pscand_core"

crates/pscand-core/src/config.rs

@@ -1,6 +1,15 @@
-use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
-use std::path::{Path, PathBuf};
+use std::{
+  collections::HashMap,
+  path::{
+    Path,
+    PathBuf,
+  },
+};
+
+use serde::{
+  Deserialize,
+  Serialize,
+};
 use thiserror::Error;
 
 #[derive(Error, Debug)]

crates/pscand-core/src/helpers/power.rs

@@ -1,6 +1,8 @@
-use std::collections::HashMap;
-use std::fs;
-use std::path::PathBuf;
+use std::{
+  collections::HashMap,
+  fs,
+  path::PathBuf,
+};
 
 pub struct PowerHelper;
 
@@ -103,7 +105,8 @@ impl PowerHelper {
     Ok(None)
   }
 
-    pub fn power_supplies() -> std::io::Result<HashMap<String, HashMap<String, String>>> {
+  pub fn power_supplies(
+  ) -> std::io::Result<HashMap<String, HashMap<String, String>>> {
     let mut supplies = HashMap::new();
     let power_supply_path = PathBuf::from("/sys/class/power_supply");
 

crates/pscand-core/src/helpers/process.rs

@@ -1,5 +1,7 @@
-use std::collections::HashMap;
-use std::fs;
+use std::{
+  collections::HashMap,
+  fs,
+};
 
 pub struct ProcessHelper;
 
@@ -25,14 +27,16 @@ impl ProcessHelper {
       }
 
       let pid: u32 = match path.file_name() {
-                Some(name) => match name.to_str() {
+        Some(name) => {
+          match name.to_str() {
             Some(s) => s.parse().ok(),
             None => None,
           }
           .ok_or(std::io::Error::new(
             std::io::ErrorKind::InvalidData,
             "invalid pid",
-                ))?,
+          ))?
+        },
         None => continue,
       };
 
@@ -88,10 +92,12 @@ impl ProcessHelper {
   }
 
   pub fn zombie_processes() -> std::io::Result<Vec<ProcessInfo>> {
-        Ok(Self::list_processes()?
+    Ok(
+      Self::list_processes()?
         .into_iter()
         .filter(|p| p.state.starts_with('Z'))
-            .collect())
+        .collect(),
+    )
   }
 
   pub fn process_count() -> std::io::Result<HashMap<String, usize>> {
@@ -109,14 +115,16 @@ impl ProcessHelper {
         'R' => *counts.get_mut("running").unwrap() += 1,
         'S' | 'D' => *counts.get_mut("sleeping").unwrap() += 1,
         'Z' => *counts.get_mut("zombie").unwrap() += 1,
-                _ => {}
+        _ => {},
       }
     }
 
     Ok(counts)
   }
 
-    pub fn top_memory_processes(count: usize) -> std::io::Result<Vec<ProcessInfo>> {
+  pub fn top_memory_processes(
+    count: usize,
+  ) -> std::io::Result<Vec<ProcessInfo>> {
     let mut processes = Self::list_processes()?;
     processes.sort_by(|a, b| b.memory_kb.cmp(&a.memory_kb));
     processes.truncate(count);

crates/pscand-core/src/helpers/resource.rs

@@ -1,5 +1,7 @@
-use std::collections::HashMap;
-use std::fs;
+use std::{
+  collections::HashMap,
+  fs,
+};
 
 pub struct ResourceHelper;
 
@@ -72,7 +74,8 @@ impl ResourceHelper {
     Ok(result)
   }
 
-    pub fn disk_stats() -> std::io::Result<HashMap<String, HashMap<String, u64>>> {
+  pub fn disk_stats() -> std::io::Result<HashMap<String, HashMap<String, u64>>>
+  {
     let content = fs::read_to_string("/proc/diskstats")?;
     let mut result = HashMap::new();
 
@@ -81,7 +84,8 @@ impl ResourceHelper {
       if parts.len() >= 14 {
         let device = parts[2].to_string();
         let mut stats = HashMap::new();
-                stats.insert("reads_completed".to_string(), parts[3].parse().unwrap_or(0));
+        stats
+          .insert("reads_completed".to_string(), parts[3].parse().unwrap_or(0));
         stats.insert("reads_merged".to_string(), parts[4].parse().unwrap_or(0));
         stats.insert("sectors_read".to_string(), parts[5].parse().unwrap_or(0));
         stats.insert("reads_ms".to_string(), parts[6].parse().unwrap_or(0));
@@ -89,8 +93,10 @@ impl ResourceHelper {
           "writes_completed".to_string(),
           parts[7].parse().unwrap_or(0),
         );
-                stats.insert("writes_merged".to_string(), parts[8].parse().unwrap_or(0));
-                stats.insert("sectors_written".to_string(), parts[9].parse().unwrap_or(0));
+        stats
+          .insert("writes_merged".to_string(), parts[8].parse().unwrap_or(0));
+        stats
+          .insert("sectors_written".to_string(), parts[9].parse().unwrap_or(0));
         stats.insert("writes_ms".to_string(), parts[10].parse().unwrap_or(0));
         result.insert(device, stats);
       }

crates/pscand-core/src/helpers/sensor.rs

@@ -1,6 +1,11 @@
-use std::collections::HashMap;
-use std::fs;
-use std::path::{Path, PathBuf};
+use std::{
+  collections::HashMap,
+  fs,
+  path::{
+    Path,
+    PathBuf,
+  },
+};
 
 pub struct SensorHelper;
 
@@ -21,7 +26,10 @@ impl SensorHelper {
     Ok(hwmons)
   }
 
-    pub fn read_hwmon_sensor(hwmon_path: &Path, sensor: &str) -> std::io::Result<Option<f64>> {
+  pub fn read_hwmon_sensor(
+    hwmon_path: &Path,
+    sensor: &str,
+  ) -> std::io::Result<Option<f64>> {
     let sensor_path = hwmon_path.join(sensor);
     if sensor_path.exists() {
       let content = fs::read_to_string(sensor_path)?;
@@ -31,7 +39,9 @@ impl SensorHelper {
     }
   }
 
-    pub fn hwmon_info(hwmon_path: &Path) -> std::io::Result<HashMap<String, String>> {
+  pub fn hwmon_info(
+    hwmon_path: &Path,
+  ) -> std::io::Result<HashMap<String, String>> {
     let mut info = HashMap::new();
 
     let name_path = hwmon_path.join("name");
@@ -53,7 +63,10 @@ impl SensorHelper {
             .ok()
             .flatten()
           {
-                        info.insert(format!("temp_{}_celsius", id), format!("{}", t / 1000.0));
+            info.insert(
+              format!("temp_{}_celsius", id),
+              format!("{}", t / 1000.0),
+            );
           }
         }
         if filename.starts_with("fan") && filename.ends_with("_input") {
@@ -73,7 +86,8 @@ impl SensorHelper {
             .ok()
             .flatten()
           {
-                        info.insert(format!("voltage_{}_mv", id), format!("{}", v / 1000.0));
+            info
+              .insert(format!("voltage_{}_mv", id), format!("{}", v / 1000.0));
           }
         }
       }
@@ -82,7 +96,8 @@ impl SensorHelper {
     Ok(info)
   }
 
-    pub fn all_sensors() -> std::io::Result<HashMap<String, HashMap<String, String>>> {
+  pub fn all_sensors(
+  ) -> std::io::Result<HashMap<String, HashMap<String, String>>> {
     let mut all = HashMap::new();
 
     for hwmon in Self::discover_hwmon()? {

crates/pscand-core/src/helpers/system.rs

@@ -1,5 +1,7 @@
-use std::fs;
-use std::time::Duration;
+use std::{
+  fs,
+  time::Duration,
+};
 
 pub struct SystemHelper;
 
@@ -14,7 +16,8 @@ impl SystemHelper {
   }
 
   pub fn boot_id() -> std::io::Result<String> {
-        fs::read_to_string("/proc/sys/kernel/random/boot_id").map(|s| s.trim().to_string())
+    fs::read_to_string("/proc/sys/kernel/random/boot_id")
+      .map(|s| s.trim().to_string())
   }
 
   pub fn load_average() -> std::io::Result<(f64, f64, f64)> {
@@ -36,10 +39,12 @@ impl SystemHelper {
   }
 
   pub fn hostname() -> std::io::Result<String> {
-        fs::read_to_string("/proc/sys/kernel/hostname").map(|s| s.trim().to_string())
+    fs::read_to_string("/proc/sys/kernel/hostname")
+      .map(|s| s.trim().to_string())
   }
 
   pub fn kernel_version() -> std::io::Result<String> {
-        fs::read_to_string("/proc/sys/kernel/osrelease").map(|s| s.trim().to_string())
+    fs::read_to_string("/proc/sys/kernel/osrelease")
+      .map(|s| s.trim().to_string())
   }
 }

crates/pscand-core/src/lib.rs

@@ -4,8 +4,17 @@ pub mod logging;
 pub mod scanner;
 
 pub use config::Config;
-pub use logging::{DaemonLogEntry, LogLevel, RingBufferLogger};
+pub use logging::{
+  DaemonLogEntry,
+  LogLevel,
+  RingBufferLogger,
+};
 pub use scanner::{
-    get_scanner, register_scanner, MetricValue, Scanner, ScannerCreatorFfi, ScannerError,
+  get_scanner,
+  register_scanner,
+  MetricValue,
+  Scanner,
+  ScannerCreatorFfi,
+  ScannerError,
 };
 pub type Result<T> = std::result::Result<T, ScannerError>;

crates/pscand-core/src/logging.rs

@@ -1,19 +1,42 @@
-use chrono::{DateTime, Utc};
+use std::{
+  collections::HashMap,
+  fs::{
+    self,
+    OpenOptions,
+  },
+  io::Write,
+  path::{
+    Path,
+    PathBuf,
+  },
+  sync::{
+    atomic::{
+      AtomicU64,
+      Ordering,
+    },
+    Arc,
+  },
+  time::Instant,
+};
+
+use chrono::{
+  DateTime,
+  Utc,
+};
 use parking_lot::Mutex;
 use ringbuf::{
   storage::Heap,
   traits::*,
-    wrap::caching::{CachingCons, CachingProd},
+  wrap::caching::{
+    CachingCons,
+    CachingProd,
+  },
   SharedRb,
 };
-use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
-use std::fs::{self, OpenOptions};
-use std::io::Write;
-use std::path::{Path, PathBuf};
-use std::sync::atomic::{AtomicU64, Ordering};
-use std::sync::Arc;
-use std::time::Instant;
+use serde::{
+  Deserialize,
+  Serialize,
+};
 
 use crate::scanner::MetricValue;
 
@@ -70,7 +93,11 @@ pub struct DaemonLogEntry {
 }
 
 impl DaemonLogEntry {
-    pub fn new(source: impl Into<String>, event: impl Into<String>, message: String) -> Self {
+  pub fn new(
+    source: impl Into<String>,
+    event: impl Into<String>,
+    message: String,
+  ) -> Self {
     Self {
       timestamp: Utc::now(),
       level: LogLevel::Info,
@@ -91,7 +118,10 @@ impl DaemonLogEntry {
 }
 
 impl LogEntry {
-    pub fn new(scanner: impl Into<String>, metrics: HashMap<String, MetricValue>) -> Self {
+  pub fn new(
+    scanner: impl Into<String>,
+    metrics: HashMap<String, MetricValue>,
+  ) -> Self {
     Self {
       timestamp: Utc::now(),
       scanner: scanner.into(),
@@ -124,7 +154,8 @@ impl LogEntry {
   }
 
   pub fn to_json(&self) -> String {
-        serde_json::to_string(self).unwrap_or_else(|e| format!("{{\"error\":\"{}\"}}", e))
+    serde_json::to_string(self)
+      .unwrap_or_else(|e| format!("{{\"error\":\"{}\"}}", e))
   }
 
   pub fn to_journal(&self) -> String {
@@ -211,7 +242,13 @@ impl RingBufferLogger {
     }
   }
 
-    pub fn log(&self, level: LogLevel, source: &str, event: &str, message: String) {
+  pub fn log(
+    &self,
+    level: LogLevel,
+    source: &str,
+    event: &str,
+    message: String,
+  ) {
     let entry = DaemonLogEntry {
       timestamp: Utc::now(),
       level,
@@ -256,19 +293,23 @@ impl RingBufferLogger {
       use std::os::unix::net::UnixDatagram;
 
       let journal_msg = format!(
-                "PRIORITY={}\nSYSLOG_IDENTIFIER=pscand\nPSCAND_SCANNER={}\nMESSAGE={}\n",
+        "PRIORITY={}\nSYSLOG_IDENTIFIER=pscand\nPSCAND_SCANNER={}\nMESSAGE={}\\
+         n",
         priority, scanner, msg
       );
 
       if let Ok(sock) = UnixDatagram::unbound() {
-                let _ = sock.send_to(journal_msg.as_bytes(), "/run/systemd/journal/socket");
+        let _ =
+          sock.send_to(journal_msg.as_bytes(), "/run/systemd/journal/socket");
       }
     });
   }
 
   fn write_to_file(&self, entry: &LogEntry) {
     if let Some(ref path) = self.file_path {
-            if let Ok(mut file) = OpenOptions::new().create(true).append(true).open(path) {
+      if let Ok(mut file) =
+        OpenOptions::new().create(true).append(true).open(path)
+      {
         let _ = writeln!(file, "{}", entry.to_json());
       }
     }
@@ -292,19 +333,23 @@ impl RingBufferLogger {
       use std::os::unix::net::UnixDatagram;
 
       let journal_msg = format!(
-                "PRIORITY={}\nSYSLOG_IDENTIFIER=pscand\nPSCAND_SOURCE={}\nPSCAND_EVENT={}\nMESSAGE={}\n",
+        "PRIORITY={}\nSYSLOG_IDENTIFIER=pscand\nPSCAND_SOURCE={}\\
+         nPSCAND_EVENT={}\nMESSAGE={}\n",
         priority, source, event, msg
       );
 
       if let Ok(sock) = UnixDatagram::unbound() {
-                let _ = sock.send_to(journal_msg.as_bytes(), "/run/systemd/journal/socket");
+        let _ =
+          sock.send_to(journal_msg.as_bytes(), "/run/systemd/journal/socket");
       }
     });
   }
 
   fn write_daemon_to_file(&self, entry: &DaemonLogEntry) {
     if let Some(ref path) = self.file_path {
-            if let Ok(mut file) = OpenOptions::new().create(true).append(true).open(path) {
+      if let Ok(mut file) =
+        OpenOptions::new().create(true).append(true).open(path)
+      {
         let _ = writeln!(file, "{}", entry.to_json());
       }
     }
@@ -384,10 +429,16 @@ impl RuntimeMonitor {
     }
   }
 
-    pub fn record_collection(&self, scanner: &str, time_ms: u64, error: Option<&str>) {
+  pub fn record_collection(
+    &self,
+    scanner: &str,
+    time_ms: u64,
+    error: Option<&str>,
+  ) {
     self.total_collections.fetch_add(1, Ordering::Relaxed);
     self.last_collection_time.store(time_ms, Ordering::Relaxed);
-        self.collection_time_sum
+    self
+      .collection_time_sum
       .fetch_add(time_ms, Ordering::Relaxed);
 
     let mut collections = self.scanner_collections.lock();
@@ -463,16 +514,13 @@ impl RuntimeMonitor {
         0.0
       };
 
-            scanner_stats.insert(
-                name.clone(),
-                ScannerStats {
+      scanner_stats.insert(name.clone(), ScannerStats {
         collections:             coll_count,
         errors:                  err_count,
         last_error:              last_err,
         last_collection_time_ms: last_t,
         avg_collection_time_ms:  avg_t,
-                },
-            );
+      });
     }
 
     RuntimeStats {
@@ -543,8 +591,12 @@ impl CrashDetector {
     }
   }
 
-    pub fn new_with_interval(state_dir: PathBuf, heartbeat_interval_secs: u64) -> Self {
-        let heartbeat = Heartbeat::new(state_dir.join("heartbeat"), heartbeat_interval_secs);
+  pub fn new_with_interval(
+    state_dir: PathBuf,
+    heartbeat_interval_secs: u64,
+  ) -> Self {
+    let heartbeat =
+      Heartbeat::new(state_dir.join("heartbeat"), heartbeat_interval_secs);
     let state_file = state_dir.join("state");
     Self {
       heartbeat,

crates/pscand-core/src/scanner.rs

@@ -1,23 +1,35 @@
-use std::collections::HashMap;
-use std::os::raw::c_void;
-use std::sync::atomic::{AtomicUsize, Ordering};
-use std::sync::LazyLock;
-use std::sync::Mutex;
-use std::time::Duration;
+use std::{
+  collections::HashMap,
+  os::raw::c_void,
+  sync::{
+    atomic::{
+      AtomicUsize,
+      Ordering,
+    },
+    LazyLock,
+    Mutex,
+  },
+  time::Duration,
+};
 
-use serde::{Deserialize, Serialize};
+use serde::{
+  Deserialize,
+  Serialize,
+};
 use thiserror::Error;
 
 pub type ScannerBox = Box<dyn Scanner>;
 pub type ScannerResult = Result<ScannerBox>;
 pub type ScannerMetrics = HashMap<String, MetricValue>;
 pub type ScannerCollectionResult = Result<ScannerMetrics>;
-pub type ScannerCollectFn = Box<dyn Fn() -> ScannerCollectionResult + Send + Sync>;
-pub type ScannerInitFnMut = Mutex<Box<dyn FnMut(&toml::Value) -> Result<()> + Send>>;
+pub type ScannerCollectFn =
+  Box<dyn Fn() -> ScannerCollectionResult + Send + Sync>;
+pub type ScannerInitFnMut =
+  Mutex<Box<dyn FnMut(&toml::Value) -> Result<()> + Send>>;
 pub type ScannerCleanupFnMut = Mutex<Box<dyn FnMut() -> Result<()> + Send>>;
-pub type ScannerCreatorFfi = unsafe extern "C" fn() -> *mut c_void;
-pub type ScannerInitFn = unsafe extern "C" fn() -> *mut c_void;
-pub type ScannerDropFn = unsafe extern "C" fn(*mut c_void);
+pub type ScannerCreatorFfi = unsafe extern fn() -> *mut c_void;
+pub type ScannerInitFn = unsafe extern fn() -> *mut c_void;
+pub type ScannerDropFn = unsafe extern fn(*mut c_void);
 
 #[derive(Error, Debug)]
 pub enum ScannerError {

crates/pscand-macros/Cargo.toml

@@ -11,4 +11,4 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1"
 quote       = "1"
-syn = { version = "2", features = ["full"] }
+syn         = { features = [ "full" ], version = "2" }

crates/pscand-macros/src/lib.rs

@@ -1,6 +1,9 @@
 use proc_macro::TokenStream;
 use quote::quote;
-use syn::{parse_macro_input, ItemFn};
+use syn::{
+  parse_macro_input,
+  ItemFn,
+};
 
 #[proc_macro_attribute]
 pub fn scanner(name: TokenStream, input: TokenStream) -> TokenStream {

docs/README.md

@@ -143,17 +143,28 @@ pscand list
 Configuration is stored in `/etc/pscand/pscand.toml`:
 
 ```toml
-[daemon]
-log_level = "info"
-scanner_dirs = ["/usr/lib/pscand/scanners"]
+# Scanner plugin directories
+scanner_dirs = ["~/.local/share/pscand/scanners"]
 
+# Where to store log files
+log_dir = "~/.local/share/pscand/logs"
+
+# Per-scanner configuration (interval in seconds)
 [scanners.system]
 enabled = true
-interval = 5000  # milliseconds
+interval_secs = 5
 
 [scanners.sensor]
 enabled = true
-interval = 10000
+interval_secs = 10
+
+[scanners.power]
+enabled = true
+interval_secs = 30
+
+[scanners.proc]
+enabled = true
+interval_secs = 5
 ```
 
 ### Scanner Directories

docs/SCANNERS.md

@@ -28,21 +28,36 @@ pscand-core = { workspace = true }
 ## Implementing the `Scanner` trait
 
 ```rust
-use pscand_core::scanner::Scanner;
+use std::time::Duration;
+use pscand_core::scanner::{Scanner, ScannerCollectionResult, MetricValue, Result};
 use pscand_macros::scanner;
+use std::collections::HashMap;
 
 pub struct CustomScanner;
 
 impl Scanner for CustomScanner {
-    fn name(&self) -> &str {
+    fn name(&self) -> &'static str {
         "custom"
     }
 
-    fn collect(&self) -> Result<serde_json::Value, Box<dyn std::error::Error>> {
-        // Collect your metrics
-        Ok(serde_json::json!({
-            "value": 42
-        }))
+    fn interval(&self) -> Duration {
+        Duration::from_secs(5)
+    }
+
+    fn init(&mut self, _config: &toml::Value) -> Result<()> {
+        // Initialize your scanner (e.g., open hardware interfaces)
+        Ok(())
+    }
+
+    fn collect(&self) -> ScannerCollectionResult {
+        let mut metrics = HashMap::new();
+        metrics.insert("value".to_string(), MetricValue::from_i64(42));
+        Ok(metrics)
+    }
+
+    fn cleanup(&mut self) -> Result<()> {
+        // Clean up resources
+        Ok(())
     }
 }
 

nix/shell.nix

@@ -17,7 +17,7 @@ mkShell {
     cargo
 
     # Tools
-    rustfmt
+    (rustfmt.override {asNightly = true;})
     clippy
     cargo
     taplo

scanners/scanner-power/Cargo.toml

@@ -10,6 +10,6 @@ pscand-core.workspace = true
 toml.workspace        = true
 
 [lib]
+crate-type = [ "cdylib" ]
 name       = "scanner_power"
 path       = "src/lib.rs"
-crate-type = ["cdylib"]

scanners/scanner-power/src/lib.rs

@@ -1,12 +1,20 @@
-use pscand_core::helpers::PowerHelper;
-use pscand_core::scanner::{MetricValue, Scanner};
-use std::collections::HashMap;
-use std::time::Duration;
+use std::{
+  collections::HashMap,
+  time::Duration,
+};
+
+use pscand_core::{
+  helpers::PowerHelper,
+  scanner::{
+    MetricValue,
+    Scanner,
+  },
+};
 
 struct PowerScanner;
 
 #[no_mangle]
-pub extern "C" fn pscand_scanner() -> *mut std::os::raw::c_void {
+pub extern fn pscand_scanner() -> *mut std::os::raw::c_void {
   Box::into_raw(Box::new(PowerScanner)) as *mut std::os::raw::c_void
 }
 

scanners/scanner-proc/Cargo.toml

@@ -10,6 +10,6 @@ pscand-core.workspace = true
 toml.workspace        = true
 
 [lib]
+crate-type = [ "cdylib" ]
 name       = "scanner_proc"
 path       = "src/lib.rs"
-crate-type = ["cdylib"]

scanners/scanner-proc/src/lib.rs

@@ -1,12 +1,20 @@
-use pscand_core::helpers::ProcessHelper;
-use pscand_core::scanner::{MetricValue, Scanner};
-use std::collections::HashMap;
-use std::time::Duration;
+use std::{
+  collections::HashMap,
+  time::Duration,
+};
+
+use pscand_core::{
+  helpers::ProcessHelper,
+  scanner::{
+    MetricValue,
+    Scanner,
+  },
+};
 
 struct ProcScanner;
 
 #[no_mangle]
-pub extern "C" fn pscand_scanner() -> *mut std::os::raw::c_void {
+pub extern fn pscand_scanner() -> *mut std::os::raw::c_void {
   Box::into_raw(Box::new(ProcScanner)) as *mut std::os::raw::c_void
 }
 

scanners/scanner-sensor/Cargo.toml

@@ -10,6 +10,6 @@ pscand-core.workspace = true
 toml.workspace        = true
 
 [lib]
+crate-type = [ "cdylib" ]
 name       = "scanner_sensor"
 path       = "src/lib.rs"
-crate-type = ["cdylib"]

scanners/scanner-sensor/src/lib.rs

@@ -1,13 +1,21 @@
-use pscand_core::helpers::SensorHelper;
-use pscand_core::scanner::{MetricValue, Scanner};
-use pscand_core::Result;
-use std::collections::HashMap;
-use std::time::Duration;
+use std::{
+  collections::HashMap,
+  time::Duration,
+};
+
+use pscand_core::{
+  helpers::SensorHelper,
+  scanner::{
+    MetricValue,
+    Scanner,
+  },
+  Result,
+};
 
 struct SensorScanner;
 
 #[no_mangle]
-pub extern "C" fn pscand_scanner() -> *mut std::os::raw::c_void {
+pub extern fn pscand_scanner() -> *mut std::os::raw::c_void {
   Box::into_raw(Box::new(SensorScanner)) as *mut std::os::raw::c_void
 }
 
@@ -41,7 +49,8 @@ impl Scanner for SensorScanner {
         for (key, value) in values {
           if key.starts_with("temp_") && key.ends_with("_celsius") {
             if let Ok(v) = value.parse::<f64>() {
-                            metrics.insert(format!("{}_{}", hwmon, key), MetricValue::from_f64(v));
+              metrics
+                .insert(format!("{}_{}", hwmon, key), MetricValue::from_f64(v));
               temp_count += 1;
               if temp_count <= 3 {
                 metrics.insert(
@@ -53,17 +62,21 @@ impl Scanner for SensorScanner {
           }
           if key.starts_with("fan_") && key.ends_with("_rpm") {
             if let Ok(v) = value.parse::<f64>() {
-                            metrics.insert(format!("{}_{}", hwmon, key), MetricValue::from_f64(v));
+              metrics
+                .insert(format!("{}_{}", hwmon, key), MetricValue::from_f64(v));
               fan_count += 1;
               if fan_count <= 2 {
-                                metrics
-                                    .insert(format!("fan_{}", fan_count), MetricValue::from_f64(v));
+                metrics.insert(
+                  format!("fan_{}", fan_count),
+                  MetricValue::from_f64(v),
+                );
               }
             }
           }
           if key.starts_with("voltage_") {
             if let Ok(v) = value.parse::<f64>() {
-                            metrics.insert(format!("{}_{}", hwmon, key), MetricValue::from_f64(v));
+              metrics
+                .insert(format!("{}_{}", hwmon, key), MetricValue::from_f64(v));
             }
           }
         }

scanners/scanner-system/Cargo.toml

@@ -10,6 +10,6 @@ pscand-core.workspace = true
 toml.workspace        = true
 
 [lib]
+crate-type = [ "cdylib" ]
 name       = "scanner_system"
 path       = "src/lib.rs"
-crate-type = ["cdylib"]

scanners/scanner-system/src/lib.rs

@@ -1,8 +1,19 @@
-use pscand_core::helpers::{ResourceHelper, SystemHelper};
-use pscand_core::scanner::{MetricValue, Scanner};
-use pscand_core::Result;
-use std::collections::HashMap;
-use std::time::Duration;
+use std::{
+  collections::HashMap,
+  time::Duration,
+};
+
+use pscand_core::{
+  helpers::{
+    ResourceHelper,
+    SystemHelper,
+  },
+  scanner::{
+    MetricValue,
+    Scanner,
+  },
+  Result,
+};
 
 #[derive(Default)]
 struct SystemScanner {
@@ -10,7 +21,7 @@ struct SystemScanner {
 }
 
 #[no_mangle]
-pub extern "C" fn pscand_scanner() -> *mut std::os::raw::c_void {
+pub extern fn pscand_scanner() -> *mut std::os::raw::c_void {
   Box::into_raw(Box::new(SystemScanner::default())) as *mut std::os::raw::c_void
 }
 
@@ -45,7 +56,8 @@ impl Scanner for SystemScanner {
 
     if let Ok(cpu) = ResourceHelper::cpu_usage() {
       if let Some(total) = cpu.get("total_usage_percent") {
-                metrics.insert("cpu_percent".to_string(), MetricValue::from_f64(*total));
+        metrics
+          .insert("cpu_percent".to_string(), MetricValue::from_f64(*total));
       }
     }
 
@@ -62,7 +74,9 @@ impl Scanner for SystemScanner {
           MetricValue::Integer(*available as i64),
         );
       }
-            if let (Some(used), Some(total)) = (mem.get("MemAvailable"), mem.get("MemTotal")) {
+      if let (Some(used), Some(total)) =
+        (mem.get("MemAvailable"), mem.get("MemTotal"))
+      {
         let used_mem = total.saturating_sub(*used);
         metrics.insert(
           "mem_used_bytes".to_string(),