Sign exchange with sig, and add sig_test.go

.github/workflows/release.yaml

@@ -29,16 +29,21 @@ jobs:
       contents: write
     steps:
       - uses: actions/checkout@v4
+      - name: Setup
+        run: |
+          mkdir sig
+          curl -s "$(curl -s https://api.github.com/repos/claytonsingh/tools/releases/latest | jq -r '.assets[] | select(.name == "sig.tar.gz") | .browser_download_url')" -L -o- | tar -xzv -C sig
       - name: Build
         run: |
           mkdir bin
           gcc exchange.c -s -Os -o exchange
       - name: Package
         run: |
           tar -czv -O -C bin . > exchange.tar.gz
+          echo "${SIG_KEY}" | sig/sig-linux-x64 sign --if exchange.tar.gz /dev/stdin --of exchange.tar.sig.gz
       - name: Upload Release
         run: |
-          gh release upload "${GITHUB_REF_NAME}" exchange.tar.gz
+          gh release upload "${GITHUB_REF_NAME}" exchange.tar.gz exchange.tar.sig.gz
         env:
           GITHUB_TOKEN: ${{ github.TOKEN }}
   build-sig:

exchange/readme.md

@@ -0,0 +1,57 @@
+# exchange
+
+A simple C program to atomically exchange two files or folders using the `renameat2(2)` system call.
+
+## Description
+
+This program provides a command-line interface to the `renameat2` system call with the `RENAME_EXCHANGE` flag, allowing users to atomically swap the names of two files or directories.
+
+## Notes
+
+- This program requires a Linux kernel that supports the `renameat2` system call (Linux 3.15 and later).
+- The program uses direct system calls, which may not be portable across all Linux distributions or kernel versions.
+
+## Building
+
+To compile the program, use:
+```bash
+gcc exchange.c -s -Os -o exchange
+cp exchange /usr/local/bin/exchange
+```
+
+## Usage
+To exchange two files or directories, run:
+```
+./exchange file1.txt file2.txt
+./exchange dir1 dir2
+```
+
+## Contributing
+
+Contributions are welcome! Open a pull request.
+
+## License
+
+```
+MIT License
+
+Copyright (c) 2024 Clayton Singh
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+```

github_public.pem

@@ -0,0 +1,3 @@
+-----BEGIN PUBLIC KEY-----
+MCowBQYDK2VwAyEAzl8VeJlM51SWa9wlOHRRvpdK0ZN1EPNMrQmLrZ9p6dk=
+-----END PUBLIC KEY-----

readme.md

@@ -0,0 +1,39 @@
+# Monorepo Tools Collection
+
+This monorepo contains various command-line tools and utilities for different purposes.
+
+## Tools Included
+
+- **exchange** - Atomically swap two files or directories.
+- **sig** - For signing, fetching, verifying, and inspecting signed documents.
+
+## Getting Started
+
+1. Clone the repository:
+   ```bash
+   git clone https://github.com/claytonsingh/tools.git
+   ```
+
+2. Navigate to the specific tool directory:
+   ```bash
+   cd tools/tool-name
+   ```
+
+3. Follow the individual README instructions for each tool.
+
+## Releases
+
+Releases for all tools are grouped together. To find the latest releases:
+
+1. Visit the [Releases page](https://github.com/claytonsingh/tools/releases) of this repository.
+2. Each release contains updates for all tools in the monorepo.
+3. Release notes will specify which tools have been updated and their respective version numbers.
+4. Download the release package, which includes pre-built binaries for all tools and supported platforms.
+
+## Contributing
+
+Contributions are welcome! Open a pull request.
+
+## License
+
+Each tool is licensed under its own license.