Dev/clone2

core/src/cgroup.rs

@@ -13,7 +13,7 @@ use std::io::BufRead;
 use std::path::{Path, PathBuf};
 use std::time::{Duration, Instant};
 
-use anyhow::{anyhow, bail, Ok};
+use anyhow::{bail, Context, Ok};
 use itertools::Itertools;
 use nix::sys::statfs;
 use nix::unistd::Pid;
@@ -278,7 +278,7 @@ pub fn mount_point() -> anyhow::Result<PathBuf> {
         .mountinfo()?
         .into_iter()
         .find(|m| m.fs_type.eq("cgroup2")) // TODO A process can have several cgroup mounts
-        .ok_or_else(|| anyhow!("no cgroup2 mount found"))
+        .context("no cgroup2 mount found")
         .map(|m| m.mount_point.clone())
 }
 
@@ -289,7 +289,7 @@ pub fn current_cgroup() -> anyhow::Result<PathBuf> {
         .cgroups()?
         .into_iter()
         .next()
-        .ok_or(anyhow!("cannot obtain cgroup"))?
+        .context("cannot obtain cgroup")?
         .pathname
         .clone();
     let path = &path[1..path.len()]; // Remove the leading '/'

core/src/file.rs

@@ -3,7 +3,7 @@ use std::marker::PhantomData;
 use std::mem::{size_of, MaybeUninit};
 use std::os::unix::prelude::{AsRawFd, FileExt, IntoRawFd, RawFd};
 
-use anyhow::{anyhow, Result};
+use anyhow::{anyhow, Context, Result};
 use memfd::{FileSeal, Memfd, MemfdOptions};
 use memmap2::{Mmap, MmapMut};
 use nix::unistd::{close, dup};
@@ -183,6 +183,6 @@ pub fn get_memfd(name: &str) -> TypedResult<i32> {
                 None
             }
         })
-        .ok_or_else(|| anyhow!("No File Descriptor with Name: {name}"))
+        .with_context(|| format!("No File Descriptor with Name: {name}"))
         .typ(SystemError::Panic)
 }

hypervisor/Cargo.toml

@@ -24,7 +24,6 @@ bytesize.workspace = true
 anyhow.workspace = true
 
 tempfile = "3.3"
-clone3 = "0.2"
 serde = { version = "1.0", features = ["derive"] }
 libc = "0.2"
 clap = { version = "4", features = [ "derive" ] }

hypervisor/src/hypervisor/mod.rs

@@ -9,7 +9,7 @@ use a653rs_linux_core::error::{ErrorLevel, LeveledResult, ResultExt, SystemError
 use a653rs_linux_core::file::TempFile;
 use a653rs_linux_core::queuing::Queuing;
 use a653rs_linux_core::sampling::Sampling;
-use anyhow::anyhow;
+use anyhow::{anyhow, Context};
 use config::{Channel, Config};
 use once_cell::sync::OnceCell;
 use partition::Partition;
@@ -133,7 +133,7 @@ impl Hypervisor {
 
         let sys_time = SYSTEM_START_TIME
             .get()
-            .ok_or_else(|| anyhow!("SystemTime was not set"))
+            .context("SystemTime was not set")
             .lev_typ(SystemError::Panic, ErrorLevel::ModuleInit)?;
         sys_time.write(&frame_start).lev(ErrorLevel::ModuleInit)?;
         sys_time.seal_read_only().lev(ErrorLevel::ModuleInit)?;