Util: Add class Shell for executing more basic OS shell commands

src/util/shell.cpp

@@ -0,0 +1,53 @@
+#include <cstdio> // pclose, perror, popen
+#include <string>
+#include <string_view>
+
+#include "util/shell.h"
+
+namespace Util {
+
+Shell::Shell()
+{
+}
+
+Shell::Shell(std::string output, int status)
+	: m_output(output)
+	, m_status(status)
+{
+}
+
+Shell Shell::operator()(const char* command)
+{
+	FILE* shell = popen(command, "r");
+	if (!shell) {
+		perror("\033[31;1mError:\033[0m popen");
+		return { "", -1 };
+	}
+
+	std::string output;
+
+	constexpr int bufferSize = 4096;
+	char buffer[bufferSize];
+	while (fgets(buffer, sizeof(buffer), shell)) {
+		output.append(buffer);
+	}
+
+	int status = pclose(shell);
+	if (status < 0) {
+		perror("\033[31;1mError:\033[0m pclose");
+	}
+
+	return { output, status };
+}
+
+Shell Shell::operator()(std::string command)
+{
+	return operator()(command.c_str());
+}
+
+Shell Shell::operator()(std::string_view command)
+{
+	return operator()(command.data());
+}
+
+} // namespace Util