Add license headers

.github/workflows/license.yml

@@ -0,0 +1,28 @@
+---
+name: License
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+jobs:
+  license:
+    name: License
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Check out
+        uses: actions/checkout@v6
+
+      - name: Check License Header
+        uses: apache/skywalking-eyes/header@main
+
+      - name: Check Dependencies' License
+        uses: apache/skywalking-eyes/dependency@main

.licenserc.yaml

@@ -0,0 +1,37 @@
+---
+header:
+  license:
+    spdx-id: Apache-2.0
+    copyright-owner: Basil Crow
+    pattern: |
+      Copyright \d{4}(, \d{4})* (Basil Crow|Delphix)
+
+      Licensed under the Apache License, Version 2.0 \(the "License"\);
+      you may not use this file except in compliance with the License.
+      You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+      Unless required by applicable law or agreed to in writing, software
+      distributed under the License is distributed on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+      See the License for the specific language governing permissions and
+      limitations under the License.
+
+  paths-ignore:
+    - '**/*.md'
+    - '.git-blame-ignore-revs'
+    - '.gitattributes'
+    - '.github/**'
+    - '.gitignore'
+    - '.licenserc.yaml'
+    - '.markdownlint.json'
+    - 'Cargo.lock'
+    - 'Cargo.toml'
+    - 'LICENSE'
+
+  comment: on-failure
+
+dependency:
+  files:
+    - Cargo.toml

build.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use roff::{bold, roman, Roff};
 use std::fs;
 use std::path::Path;

examples/pargs_penv.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use std::env;
 use std::fs::File;
 use std::thread;

examples/pfiles_af_alg.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use nix::errno::Errno;
 use nix::sys::socket::{socket, AddressFamily, SockFlag, SockType};
 use std::env;

examples/pfiles_epoll.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use nix::fcntl::OFlag;
 use nix::sys::epoll::{Epoll, EpollCreateFlags, EpollEvent, EpollFlags};
 use nix::unistd::pipe2;

examples/pfiles_matrix.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use nix::fcntl::{open, OFlag};
 use nix::sys::epoll::{Epoll, EpollCreateFlags, EpollEvent, EpollFlags};
 use nix::sys::eventfd::{EfdFlags, EventFd};

examples/pfiles_matrix_file_link.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use nix::fcntl::{open, OFlag};
 use nix::sys::stat::Mode;
 use std::env;

examples/pfiles_matrix_unix_socket.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use std::env;
 use std::fs::File;
 use std::thread;

examples/pfiles_sockopts_parent.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use std::env;
 use std::fs::File;
 use std::net::{TcpListener, UdpSocket};

examples/plgrp_process.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use std::env;
 use std::fs::File;
 use std::thread;

examples/psig_signals.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use nix::sys::signal::{pthread_sigmask, SigmaskHow};
 use nix::sys::signal::{sigaction, SaFlags, SigAction, SigHandler, SigSet, Signal};
 use std::env;

examples/pstop_prun_process.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use std::env;
 use std::fs::File;
 use std::thread;

examples/ptree_parent_child.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use nix::unistd::getppid;
 use std::env;
 use std::fs::File;

examples/pwait_process.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use std::env;
 use std::fs::File;
 use std::thread;

src/display.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 //! Shared formatting helpers for process data.
 //!
 //! This module formats environment variables, auxiliary vectors, and

src/proc/auxv.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use std::collections::HashSet;
 use std::fs::File;
 use std::io::Read;

src/proc/cred.rs

@@ -1,3 +1,19 @@
+//
+//   Copyright 2026 Basil Crow
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+
 use nix::libc;
 
 use super::Error;