LibCore: Completely drop DeprecatedFile

DeprecatedFile doesn't properly handle I/O or OOM errors, and only
provides a rudimentary interface to reasonably handle it. We have long
since learned how to do it "properly" with ErrorOr<> and similar
interfaces. See also d43a7eae54.

Note that this leaves behind an invocation to DeprecatedFile in
Ladybird/AndroidPlatform.cpp. However, that part of the system has
compilation errors since at least January, and will get removed or
rewritten as part of issue #19085. Let's not wait for this Android port
to remove this deprecated API.

Userland/Libraries/LibCore/CMakeLists.txt

@@ -4,7 +4,6 @@ set(SOURCES
     Command.cpp
     ConfigFile.cpp
     DateTime.cpp
-    DeprecatedFile.cpp
     Directory.cpp
     DirectoryEntry.cpp
     DirIterator.cpp

Userland/Libraries/LibCore/DeprecatedFile.cpp

@@ -1,211 +0,0 @@
-/*
- * Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include <AK/LexicalPath.h>
-#include <AK/Platform.h>
-#include <AK/ScopeGuard.h>
-#include <LibCore/DeprecatedFile.h>
-#include <LibCore/DirIterator.h>
-#include <LibCore/System.h>
-#include <LibFileSystem/FileSystem.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <libgen.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <utime.h>
-
-#ifdef AK_OS_SERENITY
-#    include <serenity.h>
-#endif
-
-namespace Core {
-
-ErrorOr<NonnullRefPtr<DeprecatedFile>> DeprecatedFile::open(DeprecatedString filename, OpenMode mode, mode_t permissions)
-{
-    auto file = DeprecatedFile::construct(move(filename));
-    if (!file->open_impl(mode, permissions))
-        return Error::from_errno(file->error());
-    return file;
-}
-
-DeprecatedFile::DeprecatedFile(DeprecatedString filename, Object* parent)
-    : IODevice(parent)
-    , m_filename(move(filename))
-{
-}
-
-DeprecatedFile::~DeprecatedFile()
-{
-    if (m_should_close_file_descriptor == ShouldCloseFileDescriptor::Yes && mode() != OpenMode::NotOpen)
-        close();
-}
-
-bool DeprecatedFile::open(int fd, OpenMode mode, ShouldCloseFileDescriptor should_close)
-{
-    set_fd(fd);
-    set_mode(mode);
-    m_should_close_file_descriptor = should_close;
-    return true;
-}
-
-bool DeprecatedFile::open(OpenMode mode)
-{
-    return open_impl(mode, 0666);
-}
-
-bool DeprecatedFile::open_impl(OpenMode mode, mode_t permissions)
-{
-    VERIFY(!m_filename.is_null());
-    int flags = 0;
-    if (has_flag(mode, OpenMode::ReadOnly) && has_flag(mode, OpenMode::WriteOnly)) {
-        flags |= O_RDWR | O_CREAT;
-    } else if (has_flag(mode, OpenMode::ReadOnly)) {
-        flags |= O_RDONLY;
-    } else if (has_flag(mode, OpenMode::WriteOnly)) {
-        flags |= O_WRONLY | O_CREAT;
-        bool should_truncate = !(has_flag(mode, OpenMode::Append) || has_flag(mode, OpenMode::MustBeNew));
-        if (should_truncate)
-            flags |= O_TRUNC;
-    }
-    if (has_flag(mode, OpenMode::Append))
-        flags |= O_APPEND;
-    if (has_flag(mode, OpenMode::Truncate))
-        flags |= O_TRUNC;
-    if (has_flag(mode, OpenMode::MustBeNew))
-        flags |= O_EXCL;
-    if (!has_flag(mode, OpenMode::KeepOnExec))
-        flags |= O_CLOEXEC;
-    int fd = ::open(m_filename.characters(), flags, permissions);
-    if (fd < 0) {
-        set_error(errno);
-        return false;
-    }
-
-    set_fd(fd);
-    set_mode(mode);
-    return true;
-}
-
-int DeprecatedFile::leak_fd()
-{
-    m_should_close_file_descriptor = ShouldCloseFileDescriptor::No;
-    return fd();
-}
-
-bool DeprecatedFile::is_device() const
-{
-    struct stat st;
-    if (fstat(fd(), &st) < 0)
-        return false;
-    return S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode);
-}
-
-bool DeprecatedFile::is_block_device() const
-{
-    struct stat stat;
-    if (fstat(fd(), &stat) < 0)
-        return false;
-    return S_ISBLK(stat.st_mode);
-}
-
-bool DeprecatedFile::is_char_device() const
-{
-    struct stat stat;
-    if (fstat(fd(), &stat) < 0)
-        return false;
-    return S_ISCHR(stat.st_mode);
-}
-
-bool DeprecatedFile::is_directory() const
-{
-    struct stat st;
-    if (fstat(fd(), &st) < 0)
-        return false;
-    return S_ISDIR(st.st_mode);
-}
-
-bool DeprecatedFile::is_link() const
-{
-    struct stat stat;
-    if (fstat(fd(), &stat) < 0)
-        return false;
-    return S_ISLNK(stat.st_mode);
-}
-
-DeprecatedString DeprecatedFile::real_path_for(DeprecatedString const& filename)
-{
-    if (filename.is_null())
-        return {};
-    auto* path = realpath(filename.characters(), nullptr);
-    DeprecatedString real_path(path);
-    free(path);
-    return real_path;
-}
-
-DeprecatedString DeprecatedFile::current_working_directory()
-{
-    char* cwd = getcwd(nullptr, 0);
-    if (!cwd) {
-        perror("getcwd");
-        return {};
-    }
-
-    auto cwd_as_string = DeprecatedString(cwd);
-    free(cwd);
-
-    return cwd_as_string;
-}
-
-DeprecatedString DeprecatedFile::absolute_path(DeprecatedString const& path)
-{
-    if (!Core::System::stat(path).is_error())
-        return DeprecatedFile::real_path_for(path);
-
-    if (path.starts_with("/"sv))
-        return LexicalPath::canonicalized_path(path);
-
-    auto working_directory = DeprecatedFile::current_working_directory();
-    auto full_path = LexicalPath::join(working_directory, path);
-
-    return LexicalPath::canonicalized_path(full_path.string());
-}
-
-Optional<DeprecatedString> DeprecatedFile::resolve_executable_from_environment(StringView filename)
-{
-    if (filename.is_empty())
-        return {};
-
-    // Paths that aren't just a file name generally count as already resolved.
-    if (filename.contains('/')) {
-        if (access(DeprecatedString { filename }.characters(), X_OK) != 0)
-            return {};
-
-        return filename;
-    }
-
-    auto const* path_str = getenv("PATH");
-    StringView path;
-    if (path_str)
-        path = { path_str, strlen(path_str) };
-    if (path.is_empty())
-        path = DEFAULT_PATH_SV;
-
-    auto directories = path.split_view(':');
-
-    for (auto directory : directories) {
-        auto file = DeprecatedString::formatted("{}/{}", directory, filename);
-
-        if (access(file.characters(), X_OK) == 0)
-            return file;
-    }
-
-    return {};
-};
-
-}

Userland/Libraries/LibCore/DeprecatedFile.h

@@ -1,64 +0,0 @@
-/*
- * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#pragma once
-
-#include <AK/DeprecatedString.h>
-#include <AK/Error.h>
-#include <LibCore/IODevice.h>
-#include <sys/stat.h>
-
-namespace Core {
-
-///
-/// Use of Core::File for reading/writing data is deprecated.
-/// Please use Core::File and Core::InputBufferedFile instead.
-///
-class DeprecatedFile final : public IODevice {
-    C_OBJECT(DeprecatedFile)
-public:
-    virtual ~DeprecatedFile() override;
-
-    static ErrorOr<NonnullRefPtr<DeprecatedFile>> open(DeprecatedString filename, OpenMode, mode_t = 0644);
-
-    DeprecatedString filename() const { return m_filename; }
-
-    bool is_directory() const;
-    bool is_device() const;
-    bool is_block_device() const;
-    bool is_char_device() const;
-    bool is_link() const;
-
-    static DeprecatedString current_working_directory();
-    static DeprecatedString absolute_path(DeprecatedString const& path);
-
-    static DeprecatedString real_path_for(DeprecatedString const& filename);
-
-    virtual bool open(OpenMode) override;
-
-    enum class ShouldCloseFileDescriptor {
-        No = 0,
-        Yes
-    };
-    bool open(int fd, OpenMode, ShouldCloseFileDescriptor);
-    [[nodiscard]] int leak_fd();
-
-    static Optional<DeprecatedString> resolve_executable_from_environment(StringView filename);
-
-private:
-    DeprecatedFile(Object* parent = nullptr)
-        : IODevice(parent)
-    {
-    }
-    explicit DeprecatedFile(DeprecatedString filename, Object* parent = nullptr);
-
-    bool open_impl(OpenMode, mode_t);
-
-    DeprecatedString m_filename;
-    ShouldCloseFileDescriptor m_should_close_file_descriptor { ShouldCloseFileDescriptor::Yes };
-};
-
-}

Userland/Libraries/LibCore/Forward.h

@@ -15,7 +15,6 @@ class ChildEvent;
 class ConfigFile;
 class CustomEvent;
 class DateTime;
-class DeprecatedFile;
 class DirIterator;
 class DeferredInvocationContext;
 class ElapsedTimer;

Userland/Libraries/LibCore/System.cpp

@@ -13,7 +13,6 @@
 #include <AK/StdLibExtras.h>
 #include <AK/String.h>
 #include <AK/Vector.h>
-#include <LibCore/DeprecatedFile.h>
 #include <LibCore/SessionManagement.h>
 #include <LibCore/System.h>
 #include <limits.h>