58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
 
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#pragma once
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#include <cerrno>
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#include <filesystem>
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#include <stdexcept>
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#include <string>
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namespace doos {
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class SysError : public std::runtime_error {
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public:
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explicit SysError(const std::string& what, int err = errno);
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int code() const { return code_; }
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private:
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int code_;
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};
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class Fd {
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public:
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Fd() = default;
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explicit Fd(int fd) : fd_(fd) {}
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Fd(Fd&& o) noexcept : fd_(o.release()) {}
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Fd& operator=(Fd&& o) noexcept;
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Fd(const Fd&) = delete;
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Fd& operator=(const Fd&) = delete;
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~Fd() { reset(); }
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int get() const { return fd_; }
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int release();
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void reset(int fd = -1);
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bool valid() const { return fd_ >= 0; }
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private:
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int fd_ = -1;
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};
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// flock(2) on a file for the lifetime of the object, bounded wait.
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class FileLock {
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public:
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FileLock(const std::filesystem::path& file, int timeoutMs);
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~FileLock() = default;
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void unlock() { fd_.reset(); }
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int fd() const { return fd_.get(); }
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private:
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Fd fd_;
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};
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namespace fsutil {
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void mkdirs(const std::filesystem::path& p, mode_t mode = 0755);
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void writeFile(const std::filesystem::path& p, const std::string& content);
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std::string readFile(const std::filesystem::path& p);
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// Removes a tree without following symlinks; bounded depth.
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void removeTree(const std::filesystem::path& p, std::size_t depth = 0);
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std::size_t countEntries(const std::filesystem::path& p, std::size_t cap);
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} // namespace fsutil
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} // namespace doos
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