### What does this PR do?
Fixes#24007
Possibly fixes https://github.com/oven-sh/bun/issues/18902,
https://github.com/oven-sh/bun/issues/7412
Some filesystems (bind mounts, FUSE, NFS) don't provide `d_type` in
directory entries, returning `DT_UNKNOWN`. This caused glob and
recursive readdir to skip entries entirely.
## Problem
On Linux filesystems that don't populate `d_type` in directory entries
(bind mounts, FUSE, NFS, some ext4 configurations), `readdir()` returns
`DT_UNKNOWN` instead of the actual file type. This caused:
- `Bun.Glob` to skip files/directories entirely
- `fs.readdirSync(..., {recursive: true})` to not recurse into
subdirectories
- `fs.readdirSync(..., {withFileTypes: true})` to report incorrect types
## Solution
Implemented a **lazy `lstatat()` fallback** when `d_type == DT_UNKNOWN`:
- **`sys.zig`**: Added `lstatat()` function - same as `fstatat()` but
with `AT_SYMLINK_NOFOLLOW` flag to correctly identify symlinks
- **`GlobWalker.zig`**: When encountering `.unknown` entries, first
check if filename matches pattern, then call `lstatat()` only if needed
- **`node_fs.zig`**: Handle `.unknown` in both async and sync recursive
readdir paths; propagate resolved kind to Dirent objects
- **`dir_iterator.zig`**: Return `.unknown` for `DT_UNKNOWN` entries,
letting callers handle lazy stat
**Why `lstatat` instead of `fstatat`?** We use `AT_SYMLINK_NOFOLLOW` to
preserve consistent behavior with normal filesystems - symlinks should
be reported as symlinks, not as their target type. This matches [Node.js
behavior](https://github.com/nodejs/node/blob/main/lib/internal/fs/utils.js#L251-L269)
which uses `lstat()` for the DT_UNKNOWN fallback, and follows the lazy
stat pattern established in PR #18172.
### How did you verify your code works?
**Testing:**
- Regression test: `test/regression/issue/24007.test.ts`
- FUSE filesystem test: `test/cli/run/glob-on-fuse.test.ts` (reuses
`fuse-fs.py` from PR #18172, includes symlink verification)
- All existing glob/readdir tests pass
- **Verified in Docker bind-mount environment:**
- Official Bun: `0 files`
- Patched Bun: `3 files`
**Performance:** No impact on normal filesystems - the `.unknown` branch
is only hit when `d_type == DT_UNKNOWN`. The lazy stat pattern avoids
unnecessary syscalls by checking pattern match first.
---------
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
## Summary
Fixes native module export corruption when compiling multiple NAPI
modules with `bun build --compile` on Linux.
- When loading multiple `.node` files in a compiled binary, the second
module would incorrectly get the first module's exports
- Root cause: memfd file descriptors were closed after dlopen, allowing
fd reuse. Since dlopen caches by path (`/proc/self/fd/N`), it returned
the wrong cached handle
- This bug occurs when loading native modules in quick succession, as
the fd number is likely to be reused immediately after being closed
- Fix: Disable the memfd optimization and always use temp files with
unique paths
## Test plan
- [x] Added regression test in `test/regression/issue/26045/`
- [x] Test fails with production bun (v1.3.6)
- [x] Test passes with the fix
Fixes https://github.com/oven-sh/bun/issues/26045🤖 Generated with [Claude Code](https://claude.com/claude-code)
## Summary
- Implements the `-l` (long listing) flag functionality for the shell
`ls` builtin
- The flag was being parsed but never used - output was identical to
short format
- Now displays proper long listing format: file type, permissions, hard
link count, UID, GID, size, modification time, and filename
## Test plan
- [x] Added regression test in `test/regression/issue/25831.test.ts`
- [x] Test passes with debug build: `bun bd test
test/regression/issue/25831.test.ts`
- [x] Test fails with system bun (confirming the bug exists):
`USE_SYSTEM_BUN=1 bun test test/regression/issue/25831.test.ts`
Example output with fix:
```
$ bun -e 'import { $ } from "bun"; console.log(await $`ls -l`.text())'
drwxr-xr-x 2 1000 1000 4096 Jan 12 15:30 subdir
-rw-r--r-- 1 1000 1000 11 Jan 12 15:30 file.txt
```
Fixes#25831🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Summary
- Add `MemfdFlags` enum to replace raw integer flags for `memfd_create`,
providing semantic clarity for different use cases (`executable`,
`non_executable`, `cross_process`)
- Add support for `MFD_EXEC` and `MFD_NOEXEC_SEAL` flags (Linux 6.3+)
with automatic fallback to older kernel flags when `EINVAL` is returned
- Use memfd + `/proc/self/fd/{fd}` path for loading embedded `.node`
files in standalone builds, avoiding disk writes entirely on Linux
## Test plan
- [ ] Verify standalone builds with embedded `.node` files work on Linux
- [ ] Verify fallback works on older kernels (pre-6.3)
- [ ] Verify subprocess stdio memfd still works correctly
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude <noreply@anthropic.com>
## Summary
Fixes two critical bugs in Bun Shell:
1. **Memory leaks & incorrect GC reporting**: Shell objects weren't
reporting their memory usage to JavaScriptCore's garbage collector,
causing memory to accumulate unchecked. Also fixes a leak where
`ShellArgs` wasn't being freed in `Interpreter.finalize()`.
2. **Blocking I/O on macOS**: Fixes a bug where writing large amounts of
data (>1MB) to pipes would block the main thread on macOS. The issue:
`sendto()` with `MSG_NOWAIT` flag blocks on macOS despite the flag, so
we now avoid the socket fast path unless the socket is already
non-blocking.
## Changes
- Adds `memoryCost()` and `estimatedSize()` implementations across shell
AST nodes, interpreter, and I/O structures
- Reports estimated memory size to JavaScriptCore GC via
`vm.heap.reportExtraMemoryAllocated()`
- Fixes missing `this.args.deinit()` call in interpreter finalization
- Fixes `BabyList.memoryCost()` to return bytes, not element count
- Conditionally uses socket fast path in IOWriter based on platform and
socket state
## Test plan
- [x] New test: `shell-leak-args.test.ts` - validates memory doesn't
leak during parsing/execution
- [x] New test: `shell-blocking-pipe.test.ts` - validates large pipe
writes don't block the main thread
- [x] Existing shell tests pass
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Claude Bot <claude-bot@bun.sh>
## Summary
Fixes a race condition on macOS where editing the entrypoint with vim's
atomic save causes "Module not found" errors during hot reload.
## Root Cause
On macOS, kqueue watches file descriptors/inodes, not paths. Vim's
atomic save sequence:
1. Rename `a.js` to `a.js~` → kqueue reports `NOTE_RENAME` on watched fd
2. Hot reloader immediately triggers reload
3. New file hasn't been created yet → `ENOENT` error
4. Vim re-creates `a.js`, and writes file contents into it
5. Directory gets `NOTE_WRITE` but file already removed from watchlist
```
rename("a.js", "a.js~") = 0
openat(AT_FDCWD, "a.js", O_WRONLY|O_CREAT, 0664) = 3
ftruncate(3, 0) = 0
write(3, "foobar\n", 7) = 7
close(3) = 0
```
This is macOS-specific because:
- **kqueue**: watches inodes, fd becomes stale when inode deleted
- **inotify (Linux)**: watches paths, gets `IN.MOVED_TO` (not
`IN.MOVE_SELF`), so files stay in watchlist
## Solution
When the entrypoint receives `NOTE_RENAME` on macOS:
1. Set `is_waiting_for_dir_change` flag
2. Skip immediate reload
3. Wait for parent directory `NOTE_WRITE` event
4. Use `faccessat()` to verify file exists
5. Trigger reload
This only applies to the entrypoint because dependencies have buffering
time during import graph traversal.
## Test Plan
Manual testing with vim on macOS:
1. Run `bun --hot entrypoint.js`
2. Edit entrypoint with vim (`:w`)
3. Verify no "Module not found" errors
4. Verify hot reload succeeds
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: taylor.fish <contact@taylor.fish>
### What does this PR do?
Makes isolated installs the default install strategy for projects with
workspaces in Bun v1.3.
Also fixes creating patches with `bun patch` and `--linker isolated`
Fixes#22693
### How did you verify your code works?
Added tests for node_modules renaming `bun patch` with isolated install.
---------
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
## Summary
- Adds birthtime (file creation time) support on Linux using the `statx`
syscall
- Stores birthtime in architecture-specific unused fields of the kernel
Stat struct (x86_64 and aarch64)
- Falls back to traditional `stat` on kernels < 4.11 that don't support
`statx`
- Includes comprehensive tests validating birthtime behavior
Fixes#6585
## Implementation Details
**src/sys.zig:**
- Added `StatxField` enum for field selection
- Implemented `statxImpl()`, `fstatx()`, `statx()`, and `lstatx()`
functions
- Stores birthtime in unused padding fields (architecture-specific for
x86_64 and aarch64)
- Graceful fallback to traditional stat if statx is not supported
**src/bun.js/node/node_fs.zig:**
- Updated `stat()`, `fstat()`, and `lstat()` to use statx functions on
Linux
**src/bun.js/node/Stat.zig:**
- Added `getBirthtime()` helper to extract birthtime from
architecture-specific storage
**test/js/node/fs/fs-birthtime-linux.test.ts:**
- Tests non-zero birthtime values
- Verifies birthtime immutability across file modifications
- Validates consistency across stat/lstat/fstat
- Tests BigInt stats with nanosecond precision
- Verifies birthtime ordering relative to other timestamps
## Test Plan
- [x] Run `bun bd test test/js/node/fs/fs-birthtime-linux.test.ts` - all
5 tests pass
- [x] Compare behavior with Node.js - identical behavior
- [x] Compare with system Bun - system Bun returns epoch, new
implementation returns real birthtime
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
### What does this PR do?
This assertion is occasionally incorrect, and was originally added as a
workaround for lack of proper error handling in zig's std library. We've
seen fixed that so this assertion is no longer needed.
### How did you verify your code works?
---------
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
## Summary
- Fixed embedded resource path resolution when using
`Bun.build({compile: true})` API for Windows targets
- Fixed relative path handling for `--outfile` parameter in compilation
## Details
This PR fixes two regressions introduced after v1.2.19 in the
`Bun.build({compile})` feature:
### 1. Embedded Resource Path Issue
When using `Bun.build({compile: true})`, the module prefix wasn't being
set to the target-specific base path, causing embedded resources to fail
with "ENOENT: no such file or directory" errors on Windows (e.g.,
`B:/~BUN/root/` paths).
**Fix**: Ensure the target-specific base path is used as the module
prefix in `doCompilation`, matching the behavior of the CLI build
command.
### 2. PE Metadata with Relative Paths
When using relative paths with `--outfile` (e.g.,
`--outfile=forward/slash` or `--outfile=back\\slash`), the compilation
would fail with "FailedToLoadExecutable" error.
**Fix**: Ensure relative paths are properly converted to absolute paths
before PE metadata operations.
## Test Plan
- [x] Tested `Bun.build({compile: true})` with embedded resources
- [x] Tested relative path handling with nested directories
- [x] Verified compiled executables run correctly
🤖 Generated with [Claude Code](https://claude.ai/code)
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Zack Radisic <zack@theradisic.com>
### What does this PR do?
### How did you verify your code works?
---------
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
## Summary
This PR fixes a panic that occurs when file operations use buffers
larger than 4GB on Windows.
## The Problem
When calling `fs.readSync()` or `fs.writeSync()` with buffers larger
than 4,294,967,295 bytes (u32::MAX), Bun panics with:
```
panic(main thread): integer cast truncated bits
```
## Root Cause
The Windows APIs `ReadFile()` and `WriteFile()` expect a `DWORD` (u32)
for the buffer length parameter. The code was using `@intCast` to
convert from `usize` to `u32`, which panics when the value exceeds
u32::MAX.
## The Fix
Changed `@intCast` to `@truncate` in four locations:
1. `sys.zig:1839` - ReadFile buffer length parameter
2. `sys.zig:1556` - WriteFile buffer length parameter
3. `bun.zig:230` - platformIOVecCreate length field
4. `bun.zig:240` - platformIOVecConstCreate length field
With these changes, operations with buffers > 4GB will read/write up to
4GB at a time instead of panicking.
## Test Plan
```js
// This previously caused a panic on Windows
const fs = require('fs');
const fd = fs.openSync('test.txt', 'r');
const buffer = Buffer.allocUnsafe(4_294_967_296); // 4GB + 1 byte
fs.readSync(fd, buffer, 0, buffer.length, 0);
```
Fixes https://github.com/oven-sh/bun/issues/21699🤖 Generated with [Claude Code](https://claude.ai/code)
---------
Co-authored-by: Jarred Sumner <jarred@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
