GMS Linux: start?

userprog/mkdir/Makefile

@@ -0,0 +1,15 @@
+TARGET = mkdir
+SRCS = mkdir.c
+CC = gcc
+CFLAGS = -static -Wall
+
+OUT_BIN ?= $(TARGET)
+
+all: $(OUT_BIN)
+
+$(OUT_BIN): $(SRCS)
+	@echo "   [CC] Compiling to $(OUT_BIN)..."
+	$(CC) $(CFLAGS) -o $@ $^
+
+clean:
+	rm -f $(TARGET)

userprog/mkdir/mkdir.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+int main(int argc, char *argv[]) {
+    if (argc != 2) {
+        printf("Usage: mkdir <dirname>\n");
+        return 1;
+    }
+
+    // 0755: 권한 (rwxr-xr-x)
+    if (mkdir(argv[1], 0755) < 0) {
+        perror("mkdir");
+        return 1;
+    }
+
+    return 0;
+}