From cecfcf7f919dada96dfd6dd7fba115eecb21d2e0 Mon Sep 17 00:00:00 2001
From: Dan Gohman <dev@sunfishcode.online>
Date: Tue, 6 Dec 2022 12:42:01 -0800
Subject: [PATCH] Add a basic test for opendir, readdir, and closedir. (#266)

---
 tests/general/opendir.c                  | 72 ++++++++++++++++++++++++
 tests/general/opendir.c.dir/dir-symlink  |  1 +
 tests/general/opendir.c.dir/dir/file.txt |  1 +
 tests/general/opendir.c.dir/file-symlink |  1 +
 tests/general/opendir.c.dir/file.md      |  1 +
 tests/run.sh                             |  2 +-
 6 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 tests/general/opendir.c
 create mode 120000 tests/general/opendir.c.dir/dir-symlink
 create mode 100644 tests/general/opendir.c.dir/dir/file.txt
 create mode 120000 tests/general/opendir.c.dir/file-symlink
 create mode 100644 tests/general/opendir.c.dir/file.md

diff --git a/tests/general/opendir.c b/tests/general/opendir.c
new file mode 100644
index 000000000..941e7cee3
--- /dev/null
+++ b/tests/general/opendir.c
@@ -0,0 +1,72 @@
+#include <fcntl.h>
+#include <string.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <dirent.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define perror_and_exit(message) \
+  do {                           \
+    perror(message);             \
+    return EXIT_FAILURE;         \
+  } while (0)
+
+#define OFFSET 10726
+#define LENGTH 143
+
+int main(int argc, char *argv[]) {
+  if (argc != 2) {
+    fprintf(stderr, "usage: %s <dir>\n", argv[0]);
+    return EXIT_FAILURE;
+  }
+  DIR *dir = opendir(argv[1]);
+  if (dir == NULL) {
+    perror_and_exit("opendir");
+  }
+
+  int count = 0;
+  int zeros = 0;
+  errno = 0;
+  for (;; count += 1) {
+    struct dirent *ent = readdir(dir);
+    if (ent == NULL) {
+      if (errno == 0) {
+        break;
+      }
+      perror_and_exit("readdir");
+    }
+
+    if (strcmp(ent->d_name, "file.md") == 0) {
+      assert(ent->d_type == DT_REG);
+    } else if (strcmp(ent->d_name, "dir") == 0) {
+      assert(ent->d_type == DT_DIR);
+    } else if (strcmp(ent->d_name, "file-symlink") == 0) {
+      assert(ent->d_type == DT_LNK);
+    } else if (strcmp(ent->d_name, "dir-symlink") == 0) {
+      assert(ent->d_type == DT_LNK);
+    } else if (strcmp(ent->d_name, ".") == 0) {
+      assert(ent->d_type == DT_DIR);
+    } else if (strcmp(ent->d_name, "..") == 0) {
+      assert(ent->d_type == DT_DIR);
+    } else {
+      assert(false);
+    }
+    if (ent->d_ino == 0) {
+      zeros += 1;
+    }
+  }
+
+  assert(count == 6);
+  assert(zeros <= 1);
+
+  if (closedir(dir) != 0)
+    perror_and_exit("closedir");
+
+  return EXIT_SUCCESS;
+}
diff --git a/tests/general/opendir.c.dir/dir-symlink b/tests/general/opendir.c.dir/dir-symlink
new file mode 120000
index 000000000..872451932
--- /dev/null
+++ b/tests/general/opendir.c.dir/dir-symlink
@@ -0,0 +1 @@
+dir
\ No newline at end of file
diff --git a/tests/general/opendir.c.dir/dir/file.txt b/tests/general/opendir.c.dir/dir/file.txt
new file mode 100644
index 000000000..27f8ec843
--- /dev/null
+++ b/tests/general/opendir.c.dir/dir/file.txt
@@ -0,0 +1 @@
+This is a file in a directory.
diff --git a/tests/general/opendir.c.dir/file-symlink b/tests/general/opendir.c.dir/file-symlink
new file mode 120000
index 000000000..4e87f2908
--- /dev/null
+++ b/tests/general/opendir.c.dir/file-symlink
@@ -0,0 +1 @@
+file.md
\ No newline at end of file
diff --git a/tests/general/opendir.c.dir/file.md b/tests/general/opendir.c.dir/file.md
new file mode 100644
index 000000000..654066fc8
--- /dev/null
+++ b/tests/general/opendir.c.dir/file.md
@@ -0,0 +1 @@
+# This is a top-level file
diff --git a/tests/run.sh b/tests/run.sh
index 8d5a99330..6379b581c 100755
--- a/tests/run.sh
+++ b/tests/run.sh
@@ -10,7 +10,7 @@ set -ueo pipefail
 # location.  Alternatively, exporting $CC and $CXX allow more flexibility. e.g:
 #
 #  export CXX="<wasi-sdk>/bin/clang++ --sysroot <wasi-sdk>/share/wasi-sysroot"
-#  export CCC="<wasi-sdk>/bin/clang --sysroot <wasi-sdk>/share/wasi-sysroot"
+#  export CC="<wasi-sdk>/bin/clang --sysroot <wasi-sdk>/share/wasi-sysroot"
 #
 
 # Determine the wasm runtime to use, if one is provided.