Add standalone cases (#3536)

tests/standalone/test-wasi1/main.c

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+int
+main(int argc, char **argv)
+{
+    int n, m;
+    char buf[BUFSIZ];
+
+    if (argc != 3) {
+        fprintf(stderr, "usage: %s <from> <to>\n", argv[0]);
+        exit(1);
+    }
+
+    printf("##open %s\n", argv[1]);
+    int in = open(argv[1], O_RDONLY);
+    if (in < 0) {
+        fprintf(stderr, "error opening input %s: %s\n", argv[1],
+                strerror(errno));
+        exit(1);
+    }
+
+    printf("##open %s\n", argv[2]);
+    int out = open(argv[2], O_WRONLY | O_CREAT, 0660);
+    if (out < 0) {
+        fprintf(stderr, "error opening output %s: %s\n", argv[2],
+                strerror(errno));
+        exit(1);
+    }
+
+    printf("##read content of %s, and write it to %s\n", argv[1], argv[2]);
+    while ((n = read(in, buf, BUFSIZ)) > 0) {
+        while (n > 0) {
+            m = write(out, buf, n);
+            if (m < 0) {
+                fprintf(stderr, "write error: %s\n", strerror(errno));
+                exit(1);
+            }
+            n -= m;
+        }
+    }
+
+    if (n < 0) {
+        fprintf(stderr, "read error: %s\n", strerror(errno));
+        exit(1);
+    }
+
+    printf("##success.\n");
+    return EXIT_SUCCESS;
+}