mirror of
https://github.com/ksherlock/afp.git
synced 2024-12-27 08:31:11 +00:00
clean up finder info a bit
This commit is contained in:
Kelvin Sherlock
parent
240cc298b6
commit
b9ae110fde
@ -44,70 +44,64 @@ namespace afp {
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finder_info& operator=(finder_info &&) = delete;
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const uint8_t *data() const {
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#if defined(_WIN32)
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return _afp.finder_info;
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#else
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return _finder_info;
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#endif
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bool read(const std::string &path, std::error_code &ec) {
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return open(path, read_only, ec);
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}
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uint8_t *data() {
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#if defined(_WIN32)
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return _afp.finder_info;
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#else
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return _finder_info;
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#endif
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}
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bool write(const std::string &path, std::error_code &ec);
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bool read(const std::string &fname, std::error_code &ec) {
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return open(fname, read_only, ec);
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}
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bool write(const std::string &fname, std::error_code &ec);
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bool open(const std::string &fname, open_mode perm, std::error_code &ec);
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bool open(const std::string &fname, std::error_code &ec) {
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return open(fname, read_only, ec);
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bool open(const std::string &path, open_mode perm, std::error_code &ec);
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bool open(const std::string &path, std::error_code &ec) {
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return open(path, read_only, ec);
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}
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#if defined(_WIN32)
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bool read(const std::wstring &pathName, std::error_code &ec) {
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return open(pathName, read_only, ec);
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bool read(const std::wstring &path, std::error_code &ec) {
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return open(path, read_only, ec);
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}
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bool write(const std::wstring &pathName, std::error_code &ec);
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bool write(const std::wstring &path, std::error_code &ec);
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bool open(const std::wstring &fname, open_mode perm, std::error_code &ec);
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bool open(const std::wstring &fname, std::error_code &ec) {
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return open(fname, read_only, ec);
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bool open(const std::wstring &path, open_mode perm, std::error_code &ec);
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bool open(const std::wstring &path, std::error_code &ec) {
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return open(path, read_only, ec);
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}
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#endif
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bool write(std::error_code &ec);
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uint32_t creator_type() const;
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uint32_t file_type() const;
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#if defined(_WIN32)
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const uint8_t *data() const {
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return _afp.finder_info;
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}
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uint8_t *data() {
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return _afp.finder_info;
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}
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uint16_t prodos_file_type() const {
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#if defined(_WIN32)
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return _afp.prodos_file_type;
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#else
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return _prodos_file_type;
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#endif
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}
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uint32_t prodos_aux_type() const {
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#if defined(_WIN32)
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return _afp.prodos_aux_type;
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#else
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return _prodos_aux_type;
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#endif
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}
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#else
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const uint8_t *data() const {
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return _finder_info;
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}
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uint8_t *data() {
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return _finder_info;
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}
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uint16_t prodos_file_type() const {
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return _prodos_file_type;
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}
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uint32_t prodos_aux_type() const {
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return _prodos_aux_type;
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}
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#endif
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void set_prodos_file_type(uint16_t);
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void set_prodos_file_type(uint16_t, uint32_t);
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@ -118,6 +112,8 @@ namespace afp {
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bool is_text() const;
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bool is_binary() const;
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void clear();
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private:
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void close();
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@ -37,6 +37,17 @@
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namespace {
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// ENOATTR is not standard enough, so use ENODATA.
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#if defined(ENOATTR) && ENOATTR != ENODATA
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int remap_errno(int e) {
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if (e == ENOATTR) return ENODATA;
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return e;
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}
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#else
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int remap_errno(int e) { return e; }
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#endif
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int remap_errno(void) { return remap_errno(errno); }
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/*
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tech note PT515
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@ -197,14 +208,6 @@ namespace {
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return true;
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}
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template<class T>
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T _(const T t, std::error_code &ec) {
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if (t < 0) ec = std::error_code(errno, std::generic_category());
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return t;
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}
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void set_or_throw_error(std::error_code *ec, int error, const std::string &what) {
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if (ec) *ec = std::error_code(error, std::system_category());
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else throw std::system_error(error, std::system_category(), what);
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@ -238,98 +241,36 @@ namespace {
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return CreateFileW(s.c_str(), std::forward<Args>(args)...);
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}
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void fi_close(void *fd) {
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CloseHandle(fd);
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}
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template<class StringType>
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HANDLE CreateFileX(const StringType &s, afp::resource_fork::open_mode mode, std::error_code &ec) {
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void *fi_open(const std::string &path, int perm, std::error_code &ec) {
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ec.clear();
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DWORD access = 0;
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DWORD create = 0;
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std::string s(path);
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s.append(":" XATTR_FINDERINFO_NAME);
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switch (mode) {
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case afp::resource_fork::read_only:
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access = GENERIC_READ;
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create = OPEN_EXISTING;
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break;
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case afp::resource_fork::read_write:
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access = GENERIC_READ | GENERIC_WRITE;
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create = OPEN_ALWAYS;
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break;
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case afp::resource_fork::write_only:
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access = GENERIC_READ | GENERIC_WRITE; // we always read existing info on file.
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create = OPEN_ALWAYS;
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break;
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}
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HANDLE fh;
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bool ro = perm == 1;
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HANDLE h = CreateFileX(s, access, FILE_SHARE_READ, nullptr, create, FILE_ATTRIBUTE_NORMAL, nullptr);
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fh = CreateFileX(s,
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ro ? GENERIC_READ : GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ,
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nullptr,
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ro ? OPEN_EXISTING : OPEN_ALWAYS,
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ro ? FILE_ATTRIBUTE_READONLY : FILE_ATTRIBUTE_NORMAL,
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nullptr);
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if (fh == INVALID_HANDLE_VALUE)
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if (h == INVALID_HANDLE_VALUE) {
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set_or_throw_error(&ec, "CreateFile");
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return fh;
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}
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return h;
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}
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void *fi_open(const std::wstring &path, int perm, std::error_code &ec) {
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ec.clear();
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std::wstring s(path);
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s.append(L":" XATTR_FINDERINFO_NAME);
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HANDLE fh;
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bool ro = perm == 1;
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fh = CreateFileX(s,
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ro ? GENERIC_READ : GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ,
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nullptr,
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ro ? OPEN_EXISTING : OPEN_ALWAYS,
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ro ? FILE_ATTRIBUTE_READONLY : FILE_ATTRIBUTE_NORMAL,
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nullptr);
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if (fh == INVALID_HANDLE_VALUE)
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set_or_throw_error(&ec, "CreateFile");
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return fh;
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}
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int fi_write(void *handle, const void *data, int length, std::error_code &ec) {
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ec.clear();
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DWORD rv = 0;
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BOOL ok;
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LARGE_INTEGER zero = { 0 };
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ok = SetFilePointerEx(handle, zero, nullptr, FILE_BEGIN);
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if (!ok) {
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set_or_throw_error(&ec, "SetFilePointerEx");
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return 0;
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}
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ok = WriteFile(handle, data, length, &rv, nullptr);
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if (!ok) {
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set_or_throw_error(&ec, "WriteFile");
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return 0;
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}
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return rv;
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}
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int fi_read(void *handle, void *data, int length, std::error_code &ec) {
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ec.clear();
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DWORD rv = 0;
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BOOL ok;
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LARGE_INTEGER zero = { 0 };
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ok = SetFilePointerEx(handle, zero, nullptr, FILE_BEGIN);
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if (!ok) {
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set_or_throw_error(&ec, "SetFilePointerEx");
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return 0;
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}
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ok = ReadFile(handle, data, length, &rv, nullptr);
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if (!ok) {
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set_or_throw_error(&ec, "ReadFile");
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return 0;
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}
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return rv;
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}
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#else
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@ -338,42 +279,7 @@ namespace {
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set_or_throw_error(ec, e, what);
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}
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void fi_close(int fd) {
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close(fd);
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}
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int fi_open(const std::string &path, int perm, std::error_code &ec) {
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#if defined(__sun__)
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if (perm == 1) return attropen(path.c_str(), XATTR_FINDERINFO_NAME, O_RDONLY);
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else return attropen(path.c_str(), XATTR_FINDERINFO_NAME, O_RDWR | O_CREAT, 0666);
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#else
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// linux needs to open as read/write to write it?
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//return open(path.c_str(), read_only ? O_RDONLY : O_RDWR);
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return open(path.c_str(), O_RDONLY);
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#endif
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}
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int fi_write(int fd, const void *data, int length, std::error_code &ec) {
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#if defined(__sun__)
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lseek(fd, 0, SEEK_SET);
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return write(fd, data, length);
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#else
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return write_xattr(fd, XATTR_FINDERINFO_NAME, data, length);
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#endif
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}
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int fi_read(int fd, void *data, int length, std::error_code &ec) {
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#if defined(__sun__)
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lseek(fd, 0, SEEK_SET);
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return read(fd, data, length);
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#else
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return read_xattr(fd, XATTR_FINDERINFO_NAME, data, length);
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#endif
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}
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#endif
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#if defined(_WIN32)
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@ -440,159 +346,270 @@ void afp_synchronize(struct AFP_Info *info, int trust) {
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namespace afp {
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finder_info::finder_info() {
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#if defined(_WIN32)
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finder_info::finder_info() {
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afp_init(&_afp);
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#else
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memset(&_finder_info, 0, sizeof(_finder_info));
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#endif
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}
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void finder_info::close() {
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#if _WIN32
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if (_fd != INVALID_HANDLE_VALUE) CloseHandle(_fd);
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_fd = INVALID_HANDLE_VALUE;
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}
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void _finder_info::clear() {
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std::memset(&_afp, sizeof(_afp), 0);
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afp_init(&_afp);
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}
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#else
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finder_info::finder_info() {
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memset(&_finder_info, 0, sizeof(_finder_info));
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}
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void finder_info::close() {
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if (_fd >= 0) ::close(_fd);
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_fd = -1;
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}
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void _finder_info::clear() {
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std::memset(&_finder_info, sizeof(+_finder_info), 0);
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_prodos_file_type = 0;
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_prodos_aux_type = 0;
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}
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#endif
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}
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finder_info::~finder_info() {
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close();
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}
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bool finder_info::open(const std::string &name, open_mode perm, std::error_code &ec) {
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#if defined(_WIN32)
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bool finder_info::open(const std::string &path, open_mode mode, std::error_code &ec) {
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ec.clear();
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close();
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clear();
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if (perm < 1 || perm > 3) {
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ec = std::make_error_code(std::errc::invalid_argument);
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return false;
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}
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std::string s(path);
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s += ":" XATTR_FINDERINFO_NAME;
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auto fd = fi_open(name, perm, ec);
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/* open the base file, then the finder info, so we can clarify the error */
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HANDLE h = CreateFileX(path, read_only, ec);
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if (ec) return false;
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// win32 should read even if write-only.
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bool ok = read(_fd, ec);
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if (perm == read_only) {
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fi_close(fd);
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return ok;
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}
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// write mode, so it's ok if it doesn't exist.
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if (!ok) ec.clear();
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_fd = fd;
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return true;
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}
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#if _WIN32
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bool finder_info::open(const std::wstring &name, open_mode perm, std::error_code &ec) {
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ec.clear();
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close();
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if (perm < 1 || perm > 3) {
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ec = std::make_error_code(std::errc::invalid_argument);
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return false;
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}
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auto fd = fi_open(name, perm, ec);
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if (ec) return false;
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// win32 should read even if write-only.
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bool ok = read(_fd, ec);
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if (perm == read_only) {
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fi_close(fd);
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return ok;
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}
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// write mode, so it's ok if it doesn't exist.
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if (!ok) ec.clear();
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_fd = fd;
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return true;
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}
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bool finder_info::read(void *fd, std::error_code &ec) {
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int ok = fi_read(fd, &_afp, sizeof(_afp), ec);
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_fd = CreateFileX(s, mode, ec);
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CloseHandle(h);
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if (ec) {
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afp_init(&_afp);
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if (ec.value() == ERROR_FILE_NOT_FOUND)
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ec = std::errc::no_message_available;
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return false;
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}
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if (ok < sizeof(_afp) || !afp_verify(&_afp)) {
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ec = std::make_error_code(std::errc::illegal_byte_sequence); // close enough!
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afp_init(&_afp);
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return false;
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}
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if (!_afp.prodos_file_type && !_afp.prodos_aux_type)
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afp_synchronize(&_afp, trust_hfs);
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// always read the data.
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DWORD transferred = 0;
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BOOL ok = ReadFile(_fd, _afp, sizeof(_afp), &transferred, nullptr);
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auto e = GetLastError();
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if (mode == read_only) close();
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if (!ok) {
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afp_init(&_afp);
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set_or_throw_error(&ec, e, "ReadFile");
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return false;
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}
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// warn if incorrect size or data.
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if (transferred != sizeof(_afp) || !afp_verify(&_afp)) {
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afp_init(&_afp);
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if (mode != write_only) {
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ec = std::errc::illegal_byte_sequence;
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return false;
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}
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}
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return true;
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}
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bool finder_info::write(void *fd, std::error_code &ec) {
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return fi_write(fd, &_afp, sizeof(_afp), ec) == sizeof(_afp);
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}
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bool finder_info::write(std::error_code &ec) {
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LARGE_INTEGER ll;
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BOOL ok;
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#else
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ll.QuadPart = 0;
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bool finder_info::read(int fd, std::error_code &ec) {
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int ok = fi_read(fd, &_finder_info, sizeof(_finder_info), ec);
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if (ok < 0) {
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memset(&_finder_info, 0, sizeof(_finder_info));
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ok = SetFilePointerEx(_fd, ll, nullptr, FILE_BEGIN);
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if (!ok) {
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set_or_throw_error(&ec, "SetFilePointerEx");
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return false;
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}
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ok = WriteFile(_fd, &_afp, sizeof(_afp), nullptr, nullptr);
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if (!ok) {
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set_or_throw_error(&ec, "WriteFile");
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return false;
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}
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finder_info_to_filetype(_finder_info, &_prodos_file_type, &_prodos_aux_type);
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return true;
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}
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bool finder_info::write(int fd, std::error_code &ec) {
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return fi_write(fd, &_finder_info, sizeof(_finder_info), ec) == sizeof(_finder_info);
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bool finder_info::write(const std::string &path, std::error_code &ec) {
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BOOL ok;
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std::string s(path);
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s += ":" XATTR_FINDERINFO_NAME;
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HANDLE h = CreateFileX(s,
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GENERIC_WRITE,
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FILE_SHARE_READ,
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||||
nullptr,
|
||||
CREATE_ALWAYS,
|
||||
FILE_ATTRIBUTE_NORMAL,
|
||||
nullptr);
|
||||
|
||||
if (h == INVALID_HANDLE_VALUE) {
|
||||
set_or_throw_error(&ec, "CreateFile");
|
||||
return false;
|
||||
}
|
||||
|
||||
ok = WriteFile(h, &_afp, sizeof(_afp), nullptr, nullptr);
|
||||
int e = GetLastError();
|
||||
CloseHandle(h);
|
||||
if (!ok) {
|
||||
set_or_throw_error(&ec, e, "WriteFile");
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
#endif
|
||||
#elif defined(__sun__)
|
||||
bool finder_info::open(const std::string &path, open_mode mode, std::error_code &ec) {
|
||||
ec.clear();
|
||||
close();
|
||||
clear();
|
||||
|
||||
int umode = 0;
|
||||
switch(perm) {
|
||||
case read_only: umode = O_RDONLY; break;
|
||||
case read_write: umode = O_RDWR | O_CREAT; break;
|
||||
case write_only: umode = O_WRONLY | O_CREAT | O_TRUNC; break;
|
||||
}
|
||||
|
||||
// attropen is a front end for open / openat.
|
||||
// do it ourselves so we can distinguish file doesn't exist vs attr doesn't exist.
|
||||
|
||||
int fd = open(path.c_str(), O_RDONLY);
|
||||
if (fd < 0) {
|
||||
set_or_throw_error(&ec, "open");
|
||||
return false;
|
||||
}
|
||||
|
||||
_fd = openat(fd, XATTR_FINDERINFO_NAME, umode | O_XATTR, 0666);
|
||||
int e = remap_errno();
|
||||
::close(fd);
|
||||
|
||||
if (_fd < 0) {
|
||||
if (e == ENOENT) e = ENODATA;
|
||||
set_or_throw_error(&ec, e, "openat");
|
||||
return false;
|
||||
}
|
||||
|
||||
if (mode == read_only || mode == read_write) {
|
||||
// read it...
|
||||
auto ok = ::pread(_fd, &_finder_info, 32, 0);
|
||||
e = remap_errno();
|
||||
if (mode == read_only) close();
|
||||
if (ok < 0) {
|
||||
set_or_throw_error(&ec, e, "pread");
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool finder_info::write(std::error_code &ec) {
|
||||
ec.clear();
|
||||
return write(_fd, ec);
|
||||
auto ok = ::pwrite(_fd, &_finder_info, 32, 0);
|
||||
if (ok < 0) {
|
||||
set_or_throw_error(&ec, remap_errno(), "pwrite");
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
bool finder_info::write(const std::string &name, std::error_code &ec) {
|
||||
bool finder_info::write(const std::string &path, std::error_code &ec) {
|
||||
ec.clear();
|
||||
auto fd = fi_open(name, write_only, ec);
|
||||
|
||||
if (ec)
|
||||
int e;
|
||||
|
||||
// attropen safe to use here.
|
||||
int fd = attropen(path.c_str, XATTR_FINDERINFO_NAME, O_WRONLY | O_CREAT | O_TRUNC, 0666);
|
||||
e = remap_errno();
|
||||
if (fd < 0) {
|
||||
set_or_throw_error(&ec, e, "attropen");
|
||||
return false;
|
||||
}
|
||||
auto ok = ::pwrite(fd, &_finder_info, 32, 0);
|
||||
e = remap_errno();
|
||||
::close(fd);
|
||||
|
||||
bool ok = write(fd, ec);
|
||||
fi_close(fd);
|
||||
return ok;
|
||||
if (ok < 0) {
|
||||
set_or_throw_error(&ec, e, "pwrite");
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
#else
|
||||
bool finder_info::open(const std::string &path, open_mode mode, std::error_code &ec) {
|
||||
ec.clear();
|
||||
close();
|
||||
clear();
|
||||
|
||||
_fd = open(path.c_str(), O_RDONLY);
|
||||
if (_fd < 0) {
|
||||
set_or_throw_error(&ec, "open");
|
||||
return false;
|
||||
}
|
||||
|
||||
if (mode == read_only || mode == read_write) {
|
||||
auto ok = read_xattr(_fd, XATTR_FINDERINFO_NAME, 32);
|
||||
e = remap_errno();
|
||||
if (mode == read_only) close();
|
||||
if (ok < 0) {
|
||||
set_or_throw_error(&ec, e, "read_xattr");
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
#ifdef _WIN32
|
||||
bool finder_info::write(const std::wstring &name, std::error_code &ec) {
|
||||
bool finder_info::write(std::error_code &ec) {
|
||||
ec.clear();
|
||||
auto fd = fi_open(name, write_only, ec);
|
||||
|
||||
if (ec)
|
||||
// n.b. no way to differentiate closed vs opened read-only.
|
||||
auto ok = write_xattr(_fd, XATTR_FINDERINFO_NAME, _finder_info, 32);
|
||||
if (ok < 0) {
|
||||
set_or_throw_error(&ec, remap_errno(), "write_xattr");
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool ok = write(fd, ec);
|
||||
fi_close(fd);
|
||||
return ok;
|
||||
bool finder_info::write(const std::string &path, std::error_code &ec) {
|
||||
ec.clear();
|
||||
|
||||
int fd = open(path.c_str(), O_RDONLY);
|
||||
if (fd < 0) {
|
||||
set_or_throw_error(&ec, "open");
|
||||
return false;
|
||||
}
|
||||
|
||||
auto ok = write_xattr(fd, XATTR_FINDERINFO_NAME, _finder_info, 32);
|
||||
int e = remap_errno();
|
||||
::close(fd);
|
||||
if (ok < 0) {
|
||||
set_or_throw_error(&ec, e, "write_xattr");
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
void finder_info::set_prodos_file_type(uint16_t ftype, uint32_t atype) {
|
||||
_prodos_file_type = ftype;
|
||||
_prodos_aux_type = atype;
|
||||
|
||||
@ -37,6 +37,15 @@
|
||||
|
||||
namespace {
|
||||
|
||||
#ifdef ENOATTR
|
||||
int remap_errno(int e) {
|
||||
if (e == ENOATTR) return ENODATA;
|
||||
return e;
|
||||
}
|
||||
#else
|
||||
int remap_errno(int e) { return e; }
|
||||
#endif
|
||||
|
||||
void set_or_throw_error(std::error_code *ec, int error, const std::string &what) {
|
||||
if (ec) *ec = std::error_code(error, std::system_category());
|
||||
else throw std::system_error(error, std::system_category(), what);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user