unix: change uv_cwd not to return a trailing slash

This aligns the behavior with the Windows implementation.

PR-URL: https://github.com/libuv/libuv/pull/63
Reviewed-By: Bert Belder <bertbelder@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

docs/src/misc.rst

@@ -207,6 +207,10 @@ API
 
     Gets the current working directory.
 
+    .. versionchanged:: 1.1.0
+
+        On Unix the path no longer ends in a slash.
+
 .. c:function:: int uv_chdir(const char* dir)
 
     Changes the current working directory.

src/unix/core.c

@@ -635,6 +635,11 @@ int uv_cwd(char* buffer, size_t* size) {
     return -errno;
 
   *size = strlen(buffer);
+  if (*size > 1 && buffer[*size - 1] == '/') {
+    buffer[*size-1] = '\0';
+    (*size)--;
+  }
+
   return 0;
 }