Open-Source Testing · Stebalien

tempfile

tempfile is a Rust library for creating and managing temporary files securely across Windows, Linux, macOS, and BSD systems. It handles the complexity of safely opening multiple references to the same temporary file, which is useful for concurrent access patterns.

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Source: GitHub — github.com/Stebalien/tempfile

1.4k

GitHub stars

147

Forks

Rust

Primary language

Apache-2.0

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	Stebalien/tempfile
Owner	Stebalien
Primary language	Rust
License	Apache-2.0 — OSI-approved
Stars	1.4k
Forks	147
Open issues	4
Latest release	Unknown
Last updated	2026-07-05
Source	https://github.com/Stebalien/tempfile

What tempfile is

A cross-platform Rust crate providing secure temporary file creation with support for independent file handles to the same underlying temporary resource. Minimum Rust version 1.63.0; supports POSIX systems, Windows, WebAssembly (WASI), and niche platforms like RedoxOS.

Quickstart

Get the tempfile source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/Stebalien/tempfile.git2cd tempfile3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Testing & Test Fixtures

Ideal for unit and integration tests that need isolated, self-cleaning temporary storage without manual cleanup or filesystem pollution.

Producer/Consumer Patterns

Enables safe concurrent access to a single temporary file from multiple threads or async tasks via independent file handles.

Cross-Platform Build Tools & CLI Apps

Simplifies temporary file handling in build systems, command-line utilities, and DevOps tools that run on multiple operating systems.

Implementation considerations

Minimum Rust version 1.63.0 required; verify all build targets meet this baseline, especially for niche platforms like Android and RedoxOS.
WASI (P1/P2) targets require explicit tempfile directory configuration via env::override_temp_dir; omitting this will panic at runtime.
Android deployments may require explicit temp directory override to point to the app's per-app cache directory rather than system defaults.
WASI has no file permissions model; adjust access control logic if your application relies on Rust's permission abstractions.
All major OS families (Linux, BSD, macOS, Windows) are supported, but BSD/Illumos targets are not tested against older Rust compilers—use latest stable if targeting these.

When to avoid it — and what to weigh

Persistent Long-Lived Storage Required — tempfile is designed for transient storage; it does not provide durable, application-managed persistence.
Custom Temp Directory Control on WASI — WASI P1/P2 require explicit override of the temp directory via env::override_temp_dir; automatic discovery is not available and panics without setup.
Non-Rust Projects — This is a Rust-only library; non-Rust projects cannot use it directly without FFI bindings or wrapper layers.
Filesystem Permissions Management — On WASI platforms, file permissions are not defined; projects requiring fine-grained permission control should evaluate platform-specific workarounds.

License & commercial use

Licensed under Apache License 2.0 (SPDX: Apache-2.0), a permissive OSI-approved license.

Apache-2.0 is permissive and allows commercial use, redistribution, and modification with standard attribution and liability disclaimers. Review your legal team for any derivative work compliance; no special commercial restrictions are imposed by the license itself.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Low
DEV.co fit	Good
Assessment confidence	High

Security considerations

The crate claims to provide secure temporary file creation. Review security considerations: ensure temp directories are isolated per user/application, verify platform-specific OS-level temp storage is not world-readable, and confirm file descriptor/handle leaks are not possible in your async runtime. No CVE or specific vulnerability data provided in source; consult security advisories independently.

Alternatives to consider

std::fs::File + manual tmp paths

Lower-level but requires manual TOCTOU mitigation, cleanup, and cross-platform path logic; not recommended for production.

tempdir (older Rust library)

Predecessor crate; tempfile is the modern successor with better API and maintenance; prefer tempfile.

nix::unistd (platform-specific APIs)

Fine-grained OS-level control; use only if tempfile's abstraction is insufficient and portability is not a priority.

Software development agency

Build on tempfile with DEV.co software developers

Evaluate tempfile for your Rust projects with our platform compatibility checklist. Confirm WASI and Android requirements before deployment.

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Related open-source tools

Surfaced by semantic similarity across the DEV.co open-source index.

gomplate teo rstest

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tempfile FAQ

Does tempfile automatically clean up after process exit?

Yes. Temporary files are deleted when the file handle is dropped or the process exits. No manual cleanup required in the common case.

Can I use tempfile in async Rust code?

tempfile itself is sync-only. Wrap it with tokio::fs or spawn_blocking for async contexts; the crate does not provide async I/O primitives.

What happens on WASI if I don't override the temp directory?

tempfile will panic at runtime because WASI P1/P2 do not define a default temp directory. Always call env::override_temp_dir() before creating temp files on WASI.

Is this library suitable for security-sensitive applications?

The crate is designed with security in mind (e.g., secure file creation, independent handles). However, you must verify platform-specific behavior, isolation guarantees, and file permissions on your target OS. Conduct a security review for high-risk deployments.

Software development & web development with DEV.co

DEV.co is a software development agency delivering custom software development services to companies building on open source. Our software developers and web developers design, integrate, and ship production systems — spanning web development, APIs, AI, data, and cloud. If tempfile is part of your open-source testing roadmap, our team can implement, customize, migrate, and maintain it.

Ready to integrate tempfile?

Evaluate tempfile for your Rust projects with our platform compatibility checklist. Confirm WASI and Android requirements before deployment.

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