From a6ed1757abd47d0e56039273affee85795bfae41 Mon Sep 17 00:00:00 2001
From: Ryan Dahl <ry@tinyclouds.org>
Date: Tue, 30 Aug 2011 01:32:53 -0700
Subject: [PATCH] unix: implement uv_fs_lstat

---
 src/unix/fs.c  | 50 ++++++++++++++++++++++++++++++++++++++++++++++----
 test/test-fs.c | 13 +++++++++++--
 2 files changed, 57 insertions(+), 6 deletions(-)

diff --git a/src/unix/fs.c b/src/unix/fs.c
index e053cb53..b6fb16f7 100644
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@@ -57,6 +57,7 @@ void uv_fs_req_cleanup(uv_fs_t* req) {
       break;
 
     case UV_FS_STAT:
+    case UV_FS_LSTAT:
       req->ptr = NULL;
       break;
 
@@ -98,7 +99,7 @@ static int uv__fs_after(eio_req* eio) {
     }
     req->ptr = malloc(buflen);
     memcpy(req->ptr, req->eio->ptr2, buflen);
-  } else if (req->fs_type == UV_FS_STAT) {
+  } else if (req->fs_type == UV_FS_STAT || req->fs_type == UV_FS_LSTAT) {
     req->ptr = req->eio->ptr2;
   }
 
@@ -548,12 +549,53 @@ int uv_fs_futime(uv_fs_t* req, uv_file file, double atime, double mtime, uv_fs_c
 
 
 int uv_fs_lstat(uv_fs_t* req, const char* path, uv_fs_cb cb) {
-  assert(0 && "implement me");
-  return -1;
+  char* pathdup = path;
+  int pathlen;
+
+  uv_fs_req_init(req, UV_FS_LSTAT, cb);
+
+  /* TODO do this without duplicating the string. */
+  /* TODO security */
+  pathdup = strdup(path);
+  pathlen = strlen(path);
+
+  if (pathlen > 0 && path[pathlen - 1] == '\\') {
+    /* TODO do not modify input string */
+    pathdup[pathlen - 1] = '\0';
+  }
+
+  if (cb) {
+    /* async */
+    uv_ref();
+    req->eio = eio_lstat(pathdup, EIO_PRI_DEFAULT, uv__fs_after, req);
+
+    free(pathdup);
+
+    if (!req->eio) {
+      uv_err_new(NULL, ENOMEM);
+      return -1;
+    }
+
+  } else {
+    /* sync */
+    req->result = lstat(pathdup, &req->statbuf);
+
+    free(pathdup);
+
+    if (req->result < 0) {
+      uv_err_new(NULL, errno);
+      return -1;
+    }
+
+    req->ptr = &req->statbuf;
+  }
+
+  return 0;
 }
 
 
-int uv_fs_link(uv_fs_t* req, const char* path, const char* new_path, uv_fs_cb cb) {
+int uv_fs_link(uv_fs_t* req, const char* path, const char* new_path,
+    uv_fs_cb cb) {
   assert(0 && "implement me");
   return -1;
 }
diff --git a/test/test-fs.c b/test/test-fs.c
index 58fdcacf..7ad35ea8 100644
--- a/test/test-fs.c
+++ b/test/test-fs.c
@@ -231,7 +231,7 @@ static void readdir_cb(uv_fs_t* req) {
 
 static void stat_cb(uv_fs_t* req) {
   ASSERT(req == &stat_req);
-  ASSERT(req->fs_type == UV_FS_STAT);
+  ASSERT(req->fs_type == UV_FS_STAT || req->fs_type == UV_FS_LSTAT);
   ASSERT(req->result != -1);
   ASSERT(req->ptr);
   stat_cb_count++;
@@ -435,11 +435,20 @@ TEST_IMPL(fs_async_dir) {
   r = uv_fs_stat(&stat_req, "test_dir", stat_cb);
   ASSERT(r == 0);
   uv_run();
+
   r = uv_fs_stat(&stat_req, "test_dir\\", stat_cb);
   ASSERT(r == 0);
   uv_run();
 
-  ASSERT(stat_cb_count == 2);
+  r = uv_fs_lstat(&stat_req, "test_dir", stat_cb);
+  ASSERT(r == 0);
+  uv_run();
+
+  r = uv_fs_lstat(&stat_req, "test_dir\\", stat_cb);
+  ASSERT(r == 0);
+  uv_run();
+
+  ASSERT(stat_cb_count == 4);
 
   r = uv_fs_unlink(&unlink_req, "test_dir/file1", unlink_cb);
   ASSERT(r == 0);