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diff --git a/src/base/fs_util.hh b/src/base/fs_util.hh
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+/**
+ * Copyright (c) 2022, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef lnav_fs_util_hh
+#define lnav_fs_util_hh
+
+#include <string>
+#include <vector>
+
+#include "auto_fd.hh"
+#include "ghc/filesystem.hpp"
+#include "intern_string.hh"
+#include "result.h"
+
+namespace lnav {
+namespace filesystem {
+
+inline int
+statp(const ghc::filesystem::path& path, struct stat* buf)
+{
+    return stat(path.c_str(), buf);
+}
+
+inline int
+openp(const ghc::filesystem::path& path, int flags)
+{
+    return open(path.c_str(), flags);
+}
+
+inline int
+openp(const ghc::filesystem::path& path, int flags, mode_t mode)
+{
+    return open(path.c_str(), flags, mode);
+}
+
+Result<auto_fd, std::string> create_file(const ghc::filesystem::path& path,
+                                         int flags,
+                                         mode_t mode);
+
+Result<auto_fd, std::string> open_file(const ghc::filesystem::path& path,
+                                       int flags);
+
+Result<struct stat, std::string> stat_file(const ghc::filesystem::path& path);
+
+Result<std::pair<ghc::filesystem::path, auto_fd>, std::string> open_temp_file(
+    const ghc::filesystem::path& pattern);
+
+Result<std::string, std::string> read_file(const ghc::filesystem::path& path);
+
+Result<void, std::string> write_file(const ghc::filesystem::path& path,
+                                     const string_fragment& content);
+
+std::string build_path(const std::vector<ghc::filesystem::path>& paths);
+
+class file_lock {
+public:
+    class guard {
+    public:
+        explicit guard(file_lock* arc_lock) : g_lock(arc_lock)
+        {
+            this->g_lock->lock();
+        }
+
+        guard(guard&& other) noexcept
+            : g_lock(std::exchange(other.g_lock, nullptr))
+        {
+        }
+
+        ~guard()
+        {
+            if (this->g_lock != nullptr) {
+                this->g_lock->unlock();
+            }
+        }
+
+        guard(const guard&) = delete;
+        guard& operator=(const guard&) = delete;
+        guard& operator=(guard&&) = delete;
+
+    private:
+        file_lock* g_lock;
+    };
+
+    void lock() const { lockf(this->lh_fd, F_LOCK, 0); }
+
+    void unlock() const { lockf(this->lh_fd, F_ULOCK, 0); }
+
+    explicit file_lock(const ghc::filesystem::path& archive_path);
+
+    auto_fd lh_fd;
+};
+
+}  // namespace filesystem
+}  // namespace lnav
+
+#endif