pmt: first codes.

srclib/libhelper/src/Checkers.cpp

@@ -0,0 +1,83 @@
+/*
+   Copyright 2025 Yağız Zengin
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <libhelper/lib.hpp>
+
+namespace Helper {
+
+bool hasSuperUser()
+{
+	return (getuid() == 0);
+}
+
+bool isExists(const std::string_view entry)
+{
+	struct stat st;
+	return (stat(entry.data(), &st) == 0);
+}
+
+bool fileIsExists(const std::string_view file)
+{
+	struct stat st;
+	if (stat(file.data(), &st) != 0) return false;
+	return S_ISREG(st.st_mode);
+}
+
+bool directoryIsExists(const std::string_view directory)
+{
+	struct stat st;
+	if (stat(directory.data(), &st) != 0) return false;
+	return S_ISDIR(st.st_mode);
+}
+
+bool linkIsExists(const std::string_view entry)
+{
+	return (isLink(entry) || isHardLink(entry));
+}
+
+bool isLink(const std::string_view entry)
+{
+	struct stat st;
+	if (lstat(entry.data(), &st) != 0) return false;
+	return S_ISLNK(st.st_mode);
+}
+
+bool isSymbolicLink(const std::string_view entry)
+{
+	return isLink(entry);
+}
+
+bool isHardLink(const std::string_view entry)
+{
+	struct stat st;
+	if (lstat(entry.data(), &st) != 0) return false;
+	return (st.st_nlink >= 2);
+}
+
+bool areLinked(const std::string_view entry1, const std::string_view entry2)
+{
+	const std::string_view st1 = (isSymbolicLink(entry1)) ? readSymlink(entry1) : entry1;
+	const std::string_view st2 = (isSymbolicLink(entry2)) ? readSymlink(entry2) : entry2;
+
+	return (st1 == st2);
+}
+
+} // namespace Helper