feat(userspace/coreutils): implement arch command

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/coreutils/src/arch.c

@@ -0,0 +1,69 @@
+/*
+	This file is part of Fennix Core Utilities.
+
+	Fennix Core Utilities is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix Core Utilities is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix Core Utilities. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <coreutils.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/utsname.h>
+
+void PrintUsage()
+{
+	printf("Usage: arch [OPTION]...\n");
+	printf("Display the machine hardware architecture name.\n\n");
+	printf("      --help               show this help message and exit\n");
+	printf("      --version            output version information and exit\n");
+}
+
+int main(int argc, char *argv[])
+{
+	struct utsname buffer;
+	if (uname(&buffer) != 0)
+	{
+		perror("uname");
+		exit(EXIT_FAILURE);
+	}
+
+	if (argc == 1)
+		printf("%s\n", buffer.machine);
+	else
+	{
+		for (int i = 1; i < argc; i++)
+		{
+			if (strcmp(argv[i], "--help") == 0)
+			{
+				PrintUsage();
+				exit(EXIT_SUCCESS);
+			}
+			else if (strcmp(argv[1], "--version") == 0)
+			{
+				PRINTF_VERSION;
+				exit(EXIT_SUCCESS);
+			}
+			else
+			{
+				fprintf(stderr, "uname: invalid option -- '%s'\n", argv[i]);
+				PrintUsage();
+				exit(EXIT_FAILURE);
+			}
+		}
+	}
+
+	return 0;
+}