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refactor(fs): Prepare root filesystem in big leap before applying it globally #2389

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Merged
mkroening merged 1 commit into from
Apr 22, 2026
Merged

refactor(fs): Prepare root filesystem in big leap before applying it globally #2389

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18 changes: 8 additions & 10 deletions src/fs/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -304,18 +304,17 @@ pub(crate) fn init() {
const VERSION: &str = env!("CARGO_PKG_VERSION");
const UTC_BUILT_TIME: &str = build_time::build_time_utc!();

FILESYSTEM.set(Filesystem::new()).unwrap();
FILESYSTEM
.get()
.unwrap()
let root_filesystem = Filesystem::new();

root_filesystem
.mkdir("/tmp", AccessPermission::from_bits(0o777).unwrap())
.expect("Unable to create /tmp");
FILESYSTEM
.get()
.unwrap()
root_filesystem
.mkdir("/proc", AccessPermission::from_bits(0o777).unwrap())
.expect("Unable to create /proc");

FILESYSTEM.set(root_filesystem).unwrap();

if let Ok(mut file) = File::create("/proc/version") {
if write!(file, "Hermit version {VERSION} # UTC {UTC_BUILT_TIME}").is_err() {
error!("Unable to write in /proc/version");
Expand All @@ -324,12 +323,11 @@ pub(crate) fn init() {
error!("Unable to create /proc/version");
}

let mut cwd = WORKING_DIRECTORY.lock();
*cwd = Some("/tmp".to_owned());
drop(cwd);
*WORKING_DIRECTORY.lock() = Some("/tmp".to_owned());

#[cfg(feature = "virtio-fs")]
virtio_fs::init();

if crate::env::is_uhyve() {
uhyve::init();
}
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