Add disk speeds to disk usage data

src/system.js

@@ -26,6 +26,7 @@ const apps = require('./apps.js'),
     volumes = require('./volumes.js');
 
 const DU_CMD = path.join(__dirname, 'scripts/du.sh');
+const HDPARM_CMD = path.join(__dirname, 'scripts/hdparm.sh');
 
 async function du(file) {
     assert.strictEqual(typeof file, 'string');
@@ -36,6 +37,22 @@ async function du(file) {
     return parseInt(stdoutResult.trim(), 10);
 }
 
+async function hdparm(file) {
+    assert.strictEqual(typeof file, 'string');
+
+    const [error, stdoutResult] = await safe(shell.promises.sudo('system', [ HDPARM_CMD, file ], {}));
+    if (error) throw new BoxError(BoxError.FS_ERROR, error);
+
+    const lines = stdoutResult.split('\n');
+
+    if (lines.length != 4) return -1;
+    if (lines[2].split('=').length !== 2) return -1;
+
+    const speed = lines[2].split('=')[1].slice(0, 'MB/sec'.length).trim();
+
+    return Number(speed);
+}
+
 async function getSwaps() {
     const stdout = safe.child_process.execSync('swapon --noheadings --raw --bytes --show=type,size,used,name', { encoding: 'utf8' });
     if (!stdout) return {};
@@ -194,6 +211,11 @@ async function updateDiskUsage(progressCallback) {
     for (const filesystem of filesystems) {
         const disk = disks[filesystem];
 
+        const [speedError, speed] = await safe(hdparm(filesystem));
+        if (speedError) progressCallback({ message: `hdparm error: ${speedError.message}`});
+
+        disk.speed = speed;
+
         percent += (100/filesystems.length);
         progressCallback({ percent, message: `Checking contents of ${filesystem}`});
 
@@ -205,6 +227,7 @@ async function updateDiskUsage(progressCallback) {
                 const [error, usage] = await safe(du(content.path));
                 if (error) progressCallback({ message: `du error: ${error.message}`}); // can happen if app is installing etc
                 content.usage = usage || 0;
+
             }
             progressCallback({ message: `du of ${JSON.stringify(content)}: ${content.usage}`});
         }