Userspace: implement basic rm command

userspace/CMakeLists.txt

@@ -16,6 +16,7 @@ set(USERSPACE_PROJECTS
 	mkdir
 	mmap-shared-test
 	poweroff
+	rm
 	Shell
 	snake
 	stat

userspace/rm/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.26)
+
+project(rm CXX)
+
+set(SOURCES
+	main.cpp
+)
+
+add_executable(rm ${SOURCES})
+target_compile_options(rm PUBLIC -O2 -g)
+target_link_libraries(rm PUBLIC libc)
+
+add_custom_target(rm-install
+	COMMAND sudo cp ${CMAKE_CURRENT_BINARY_DIR}/rm ${BANAN_BIN}/
+	DEPENDS rm
+	USES_TERMINAL
+)

userspace/rm/main.cpp

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int main(int argc, char** argv)
+{
+	if (argc <= 1)
+	{
+		fprintf(stderr, "Missing operand\n");
+		return 1;
+	}
+
+	int ret = 0;
+	for (int i = 1; i < argc; i++)
+	{
+		if (unlink(argv[i]) == -1)
+		{
+			perror(argv[i]);
+			ret = 1;
+		}
+	}
+	return ret;
+}