Add file I/O test

Makefile

@@ -11,7 +11,7 @@ src:
 	@$(MAKE) --no-print-directory -C src
 
 test:
-	@$(MAKE) --no-print-directory -C test run
+	@$(MAKE) --no-print-directory -C test test
 
 clean:
 	@$(MAKE) --no-print-directory -C src clean

src/libos/src/fs/mod.rs

@@ -49,7 +49,7 @@ pub fn do_open(path: &str, flags: u32, mode: u32) -> Result<FileDesc, Error> {
         Arc::new(SgxMutex::new(sgx_file))
     };
 
-    let is_readable = (flags & O_RDONLY != 0) || (flags & O_RDWR != 0);
+    let is_readable = (flags & O_WRONLY) == 0;
     let is_writable = (flags & O_WRONLY != 0) || (flags & O_RDWR != 0);
     let is_append = (flags & O_APPEND != 0);
     let file_ref : Arc<Box<File>> = Arc::new(Box::new(

test/Makefile

@@ -1,9 +1,9 @@
 CUR_DIR := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
 PROJECT_DIR := $(realpath $(CUR_DIR)/../)
 
-TEST_SUITES := empty hello_world malloc getpid spawn
+TEST_SUITES := empty hello_world malloc file getpid spawn
 BUILD_TEST_SUITES := $(TEST_SUITES:%=%)
-RUN_TEST_SUITES := $(TEST_SUITES:%=run-%)
+RUN_TEST_SUITES := $(TEST_SUITES:%=test-%)
 CLEAN_TEST_SUITES := $(TEST_SUITES:%=clean-%)
 
 CYAN := \033[1;36m
@@ -30,7 +30,7 @@ $(BUILD_TEST_SUITES): %:
 # Run tests
 #############################################################################
 
-run: build $(RUN_TEST_SUITES)
+test: build $(RUN_TEST_SUITES)
 
 pal: $(PROJECT_DIR)/src/pal/pal
 	@cp $< pal
@@ -38,9 +38,9 @@ pal: $(PROJECT_DIR)/src/pal/pal
 libocclum.signed.so: $(PROJECT_DIR)/src/libos/libocclum.signed.so
 	@cp $< libocclum.signed.so
 
-$(RUN_TEST_SUITES): run-%: % pal libocclum.signed.so
-	@echo "$(CYAN)TEST => $<$(NO_COLOR)"
-	@$(MAKE) --no-print-directory -C $< run ; \
+$(RUN_TEST_SUITES): test-%: % pal libocclum.signed.so
+	@echo "$(CYAN)RUN TEST => $<$(NO_COLOR)"
+	@$(MAKE) --no-print-directory -C $< test ; \
 		if [ $$? -eq 0 ] ; then \
 			echo "$(GREEN)PASS$(NO_COLOR)" ; \
 		else \

test/file/Makefile

@@ -0,0 +1,4 @@
+include ../test_common.mk
+
+EXTRA_C_FLAGS :=
+EXTRA_LINK_FLAGS :=

test/file/main.c

@@ -0,0 +1,44 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+
+int main() {
+    const char* file_name = "tmp.txt";
+    int fd, flags, mode, len;
+    const char* write_msg = "Hello World\n";
+    char read_buf[128] = {0};
+
+    flags = O_WRONLY | O_CREAT| O_TRUNC;
+    mode = 00666;
+    if ((fd = open(file_name, flags, mode)) < 0) {
+        printf("ERROR: failed to open a file for write\n");
+        return -1;
+    }
+    if ((len = write(fd, write_msg, strlen(write_msg))) <= 0) {
+        printf("ERROR: failed to write to the file\n");
+        return -1;
+    }
+    close(fd);
+
+    flags = O_RDONLY;
+    if ((fd = open(file_name, flags)) < 0) {
+        printf("ERROR: failed to open a file for read\n");
+        return -1;
+    }
+    if ((len = read(fd, read_buf, sizeof(read_buf) - 1)) <= 0) {
+        printf("ERROR: failed to read from the file\n");
+        return -1;
+    }
+    close(fd);
+
+    if (strcmp(write_msg, read_buf) != 0) {
+        printf("ERROR: the message read from the file is not as it was written\n");
+        return -1;
+    }
+
+    printf("File write and read succesfully\n");
+    return 0;
+}

test/hello_world/main.c

@@ -4,7 +4,7 @@
 
 static const char* msg = "Hello World\n";
 
-int main(int argc) {
+int main() {
     printf("%s", msg);
     return 0;
 }

test/test_common.mk

@@ -16,7 +16,7 @@ C_FLAGS = -Wall -O0 $(EXTRA_C_FLAGS)
 C_FLAGS += -Xclang -load -Xclang $(LLVM_PATH)/lib/LLVMBoundchecker.so -mllvm -check-store-only=true
 LINK_FLAGS = $(C_FLAGS) $(EXTRA_LINK_FLAGS)
 
-.PHONY: all run debug clean
+.PHONY: all test debug clean
 
 #############################################################################
 # Build
@@ -44,18 +44,18 @@ $(READELF_FILE): $(BIN_NAME)
 	@echo "READELF => $@"
 
 $(BIN_NAME): $(C_OBJS)
-	@$(CC) $^ $(LINK_FLAGS) -o $(BIN_NAME) 2> /dev/null
+	@$(CC) $^ $(LINK_FLAGS) -o $(BIN_NAME)
 	@echo "LINK => $@"
 
 $(C_OBJS): %.o: %.c
-	@$(CC) $(C_FLAGS) -c $< -o $@ 2> /dev/null
+	@$(CC) $(C_FLAGS) -c $< -o $@
 	@echo "CC <= $@"
 
 #############################################################################
 # Test
 #############################################################################
 
-run: $(BIN_ENC_NAME)
+test: $(BIN_ENC_NAME)
 	@cd ../ && RUST_BACKTRACE=1 ./pal $(CUR_DIR)/$(BIN_ENC_NAME)
 
 #############################################################################