add test for readdir

test/Makefile

@@ -4,7 +4,7 @@ PROJECT_DIR := $(realpath $(CUR_DIR)/../)
 # Dependencies: need to be compiled but not to run by any Makefile target
 TEST_DEPS := dev_null
 # Tests: need to be compiled and run by test-% target
-TESTS := empty argv hello_world malloc file getpid spawn pipe time truncate
+TESTS := empty argv hello_world malloc file getpid spawn pipe time truncate readdir
 # Benchmarks: need to be compiled and run by bench-% target
 BENCHES := spawn_and_exit_latency pipe_throughput
 
@@ -13,7 +13,7 @@ BUILD_TARGETS := $(TEST_DEPS) $(TESTS) $(BENCHES)
 TEST_TARGETS := $(TESTS:%=test-%)
 BENCH_TARGETS := $(BENCHES:%=bench-%)
 CLEAN_TARGETS := $(BUILD_TARGETS:%=clean-%)
-.PHONY: all build test clean $(BUILD_TARGETS) $(TEST_TARGETS) $(BENCH_TARGETS) $(CLEAN_TARGETS)
+.PHONY: all build test clean sefs $(BUILD_TARGETS) $(TEST_TARGETS) $(BENCH_TARGETS) $(CLEAN_TARGETS)
 
 # Use echo program instead of built-in echo command in shell. This ensures
 # that echo can recognize escaped sequences (with -e argument) regardless of

test/readdir/Makefile

@@ -0,0 +1,5 @@
+include ../test_common.mk
+
+EXTRA_C_FLAGS :=
+EXTRA_LINK_FLAGS :=
+BIN_ARGS :=

test/readdir/main.c

@@ -0,0 +1,23 @@
+#include <sys/types.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+
+int main(int argc, const char* argv[]) {
+    DIR* dirp = opendir(".");
+    if (dirp == NULL) {
+        printf("failed to open directory at /\n");
+        return -1;
+    }
+
+	struct dirent *dp;
+	while ((dp = readdir(dirp)) != NULL) {
+		printf("get: %s\n", dp->d_name);
+	}
+
+    closedir(dirp);
+
+    printf("Read directory test successful\n");
+    return 0;
+}