fix(userspace/falco): enable --support on windows

Signed-off-by: Roberto Scolaro <roberto.scolaro21@gmail.com>

userspace/falco/app/actions/print_support.cpp

@@ -15,7 +15,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+#ifndef _WIN32
 #include <sys/utsname.h>
+#endif
 
 #include "actions.h"
 #include "../../versions_info.h"
@@ -37,23 +39,58 @@ falco::app::run_result falco::app::actions::print_support(falco::app::state& s)
 	if(s.options.print_support)
 	{
 		nlohmann::json support;
-		struct utsname sysinfo;
 		std::string cmdline;
 
+#ifndef _WIN32
+		struct utsname sysinfo;
 		if(uname(&sysinfo) != 0)
 		{
 			return run_result::fatal(std::string("Could not uname() to find system info: ") + strerror(errno));
 		}
+#else
+		OSVERSIONINFO osvi;
+		SYSTEM_INFO sysInfo;
+		TCHAR computerName[256];
+		DWORD size = sizeof(computerName);
+
+		osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+		GetSystemInfo(&sysInfo);
+		if(!GetVersionEx(&osvi) || !GetComputerName(computerName, &size))
+		{
+			return run_result::fatal(std::string("Could not get system info: ") + strerror(errno));
+		}
+#endif
 
 		const falco::versions_info infos(s.offline_inspector);
 		support["version"] = infos.falco_version;
 		support["engine_info"] = infos.as_json();
 
+#ifndef _WIN32
 		support["system_info"]["sysname"] = sysinfo.sysname;
 		support["system_info"]["nodename"] = sysinfo.nodename;
 		support["system_info"]["release"] = sysinfo.release;
 		support["system_info"]["version"] = sysinfo.version;
 		support["system_info"]["machine"] = sysinfo.machine;
+#else
+		support["system_info"]["sysname"] = "Windows";
+		support["system_info"]["nodename"] = computerName;
+		support["system_info"]["release"] = osvi.dwMajorVersion;
+		support["system_info"]["version"] = osvi.dwMinorVersion;
+
+		switch (sysInfo.wProcessorArchitecture) {
+			case PROCESSOR_ARCHITECTURE_AMD64:
+				support["system_info"]["machine"] = "x86_64";
+				break;
+			case PROCESSOR_ARCHITECTURE_ARM:
+				support["system_info"]["machine"] = "ARM";
+				break;
+			case PROCESSOR_ARCHITECTURE_INTEL:
+				support["system_info"]["machine"] = "i386";
+				break;
+			default:
+				support["system_info"]["machine"] = "unknown";
+		}
+#endif
 		support["cmdline"] = s.cmdline;
 		support["config"] = read_file(s.options.conf_filename);
 		support["rules_files"] = nlohmann::json::array();