Vendor dependencies

Let's see how I like this workflow.

vendor/procfs/examples/diskstat.rs

@@ -0,0 +1,31 @@
+use procfs::{diskstats, process::Process, DiskStat};
+use std::collections::HashMap;
+use std::iter::FromIterator;
+
+fn main() {
+    let me = Process::myself().unwrap();
+    let mounts = me.mountinfo().unwrap();
+
+    // Get a list of all disks that we have IO stat info on
+    let disk_stats: HashMap<(i32, i32), DiskStat> =
+        HashMap::from_iter(diskstats().unwrap().into_iter().map(|i| ((i.major, i.minor), i)));
+
+    for mount in mounts {
+        // parse the majmin string (something like "0:3") into an (i32, i32) tuple
+        let (maj, min): (i32, i32) = {
+            let mut s = mount.majmin.split(':');
+            (s.next().unwrap().parse().unwrap(), s.next().unwrap().parse().unwrap())
+        };
+
+        if let Some(stat) = disk_stats.get(&(maj, min)) {
+            println!("{} mounted on {}:", stat.name, mount.mount_point.display());
+            println!("  total reads: {} ({} ms)", stat.reads, stat.time_reading);
+            println!("  total writes: {} ({} ms)", stat.writes, stat.time_writing);
+            println!(
+                "  total flushes: {} ({} ms)",
+                stat.flushes.unwrap_or(0),
+                stat.time_flushing.unwrap_or(0)
+            );
+        }
+    }
+}