import RT-Thread@9217865c without bsp, libcpu and components/net

examples/utest/testcases/posix/unistd_h/functions/access_tc.c

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#define ACCESS_DIR "./access_dir"
+
+#include <utest.h>
+static int access_entry(void)
+{
+    int i = 0;
+
+    /* file/dir that not exist*/
+    char *files[] =
+    {
+        "/usr/local/nginx/conf/nginx.conf",
+        "./a.out",
+        "/usr/include/libgen.h",
+        "/ff/last",
+        NULL
+    };
+
+    for (i = 0; files[i] != NULL; i++)
+    {
+        /* mode=0: file/dir exist or not */
+        uassert_int_not_equal(access(files[i], 0), 0);
+    }
+
+    mkdir(ACCESS_DIR, 0x777);
+    uassert_int_equal(access(ACCESS_DIR, 0), 0);
+    return 0;
+}
+
+static void test_access(void)
+{
+    uassert_int_equal(access_entry(), 0);
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_access);
+}
+UTEST_TC_EXPORT(testcase, "posix.unistd_h.access_tc.c", RT_NULL, RT_NULL, 10);
+