1 files changed, 86 insertions, 0 deletions
diff --git a/Libraries/LibCore/File.cpp b/Libraries/LibCore/File.cpp
new file mode 100644
index 0000000000..e5058f8dfb
--- /dev/null
+++ b/Libraries/LibCore/File.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+ */
+
+#include <LibCore/File.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+namespace Core {
+
+File::File(const StringView& filename, Object* parent)
+    : IODevice(parent)
+    , m_filename(filename)
+{
+}
+
+File::~File()
+{
+    if (m_should_close_file_descriptor == ShouldCloseFileDescription::Yes && mode() != NotOpen)
+        close();
+}
+
+bool File::open(int fd, IODevice::OpenMode mode, ShouldCloseFileDescription should_close)
+{
+    set_fd(fd);
+    set_mode(mode);
+    m_should_close_file_descriptor = should_close;
+    return true;
+}
+
+bool File::open(IODevice::OpenMode mode)
+{
+    ASSERT(!m_filename.is_null());
+    int flags = 0;
+    if ((mode & IODevice::ReadWrite) == IODevice::ReadWrite) {
+        flags |= O_RDWR | O_CREAT;
+    } else if (mode & IODevice::ReadOnly) {
+        flags |= O_RDONLY;
+    } else if (mode & IODevice::WriteOnly) {
+        flags |= O_WRONLY | O_CREAT;
+        bool should_truncate = !((mode & IODevice::Append) || (mode & IODevice::MustBeNew));
+        if (should_truncate)
+            flags |= O_TRUNC;
+    }
+    if (mode & IODevice::Append)
+        flags |= O_APPEND;
+    if (mode & IODevice::Truncate)
+        flags |= O_TRUNC;
+    if (mode & IODevice::MustBeNew)
+        flags |= O_EXCL;
+    int fd = ::open(m_filename.characters(), flags, 0666);
+    if (fd < 0) {
+        set_error(errno);
+        return false;
+    }
+
+    set_fd(fd);
+    set_mode(mode);
+    return true;
+}
+
+}