Calling sysinfo

3 files changed, 61 insertions, 3 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 064dbdc..1304ff4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -98,6 +98,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b6a852b24ab71dffc585bcb46eaf7959d175cb865a7152e35b348d1b2960422"
 
 [[package]]
+name = "cty"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b365fabc795046672053e29c954733ec3b05e4be654ab130fe8f1f94d7051f35"
+
+[[package]]
 name = "heck"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -204,6 +210,7 @@ name = "varanus"
 version = "0.1.0"
 dependencies = [
  "clap",
+ "cty",
  "serde",
  "serde_json",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index e503a55..c9a0fe0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,5 +7,6 @@ edition = "2021"
 
 [dependencies]
 clap = { version = "4.5.4", features = ["derive"] }
+cty = { version = "0.2.2" }
 serde = { version = "1.0.203", features = ["derive"] }
 serde_json = { version = "1.0" }
diff --git a/src/main.rs b/src/main.rs
index cd5df09..0848754 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -18,6 +18,16 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+/* TODO
+ *
+ * Remove socket file when daemon exits.
+ *
+ * Accept command-line arguments to query only part of JSON
+ *
+ * Fix delay
+ *
+ */
+
 use std::error;
 use std::fs::remove_file;
 use std::io::{Read,Write};
@@ -30,6 +40,36 @@ use std::time::{Duration,Instant,SystemTime};
 use clap::Parser;
 use serde::{Serialize,Deserialize};
 
+#[derive(Default)]
+#[repr(C)]
+struct Sysinfo {
+    uptime: cty::c_long,
+    loads: [cty::c_ulong; 3],
+    totalram: cty::c_ulong,
+    freeram: cty::c_ulong,
+    sharedram: cty::c_ulong,
+    bufferram: cty::c_ulong,
+    totalswap: cty::c_ulong,
+    freeswap: cty::c_ulong,
+    procs: cty::c_ushort,
+    totalhigh: cty::c_ulong,
+    freehigh: cty::c_ulong,
+    mem_unit: cty::c_uint,
+    /*char _f[20-2*sizeof(long)-sizeof(int)];*/
+}
+
+extern "C" {
+    fn sysinfo(si: *mut Sysinfo) -> cty::c_int;
+}
+
+impl Sysinfo {
+    fn new() -> Self {
+        let mut si = Sysinfo::default();
+        unsafe { sysinfo(&mut si) };
+        return si;
+    }
+}
+
 #[derive(Parser)]
 struct Cli {
     #[arg(short='d', long)]
@@ -61,11 +101,18 @@ struct Process {
 }
 
 #[derive(Debug, Serialize, Deserialize)]
+struct ProcFS {
+}
+
+impl ProcFS {
+}
+
+#[derive(Debug, Serialize, Deserialize)]
 struct Memory {
 }
 
 impl Memory {
-    fn new() -> Self {
+    fn new(si: Sysinfo) -> Self {
         return Memory{}
     }
 }
@@ -73,6 +120,7 @@ impl Memory {
 #[derive(Debug, Serialize, Deserialize)]
 struct State {
     asof: SystemTime,
+    uptime: i64,
     power: Power,
     memory: Memory,
 }
@@ -80,10 +128,12 @@ struct State {
 impl State {
     fn new() -> Self {
         let asof = SystemTime::now();
+        let si = Sysinfo::new();
         return State {
             asof: asof,
+            uptime: si.uptime,
             power: Power::new(),
-            memory: Memory::new()
+            memory: Memory::new(si)
         }
     }
 
@@ -109,7 +159,7 @@ fn main() {
     let args = Cli::parse();
     if args.daemon {
         let start = Instant::now();
-        let delay_ms: u64 = args.delay * 1000;
+        let delay_ms: u64 = args.delay * 1000; // TODO not right
         let mut cycle: u64 = 0;
         let state_mutex = Arc::new(Mutex::new(State::new()));
         let listen_thread = {