Add guac_rdpdr_fs_read_dir(). Bump _POSIX_C_SOURCE value as necessary for fdopendir().

src/protocols/rdp/guac_rdpdr/rdpdr_fs.c

@@ -37,6 +37,7 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <dirent.h>
 #include <fcntl.h>
 
 #ifdef ENABLE_WINPR
@@ -251,11 +252,13 @@ int guac_rdpdr_fs_open(guac_rdpdr_device* device, const char* path,
 void guac_rdpdr_fs_close(guac_rdpdr_device* device, int file_id) {
 
     guac_rdpdr_fs_data* data = (guac_rdpdr_fs_data*) device->data;
+    guac_rdpdr_fs_file* file;
 
     /* Only close if file ID is valid */
-    if (file_id >= 0 && file_id <= GUAC_RDPDR_FS_MAX_FILES-1) {
+    if (file_id < 0 || file_id >= GUAC_RDPDR_FS_MAX_FILES)
+        return;
 
-        guac_rdpdr_fs_file* file = &(data->files[file_id]);
+    file = &(data->files[file_id]);
 
     /* Close directory, if open */
     if (file->dir != NULL)
@@ -268,7 +271,34 @@ void guac_rdpdr_fs_close(guac_rdpdr_device* device, int file_id) {
     guac_pool_free_int(data->file_id_pool, file_id);
     data->open_files--;
 
+}
+
+const char* guac_rdpdr_fs_read_dir(guac_rdpdr_device* device, int file_id) {
+
+    guac_rdpdr_fs_data* data = (guac_rdpdr_fs_data*) device->data;
+    guac_rdpdr_fs_file* file;
+
+    struct dirent* result;
+
+    /* Only read if file ID is valid */
+    if (file_id < 0 || file_id >= GUAC_RDPDR_FS_MAX_FILES)
+        return NULL;
+
+    file = &(data->files[file_id]);
+
+    /* Open directory if not yet open, stop if error */
+    if (file->dir == NULL) {
+        file->dir = fdopendir(file->fd);
+        if (file->dir == NULL)
+            return NULL;
     }
 
+    /* Read next entry, stop if error */
+    if (readdir_r(file->dir, &(file->__dirent), &result))
+        return NULL;
+
+    /* Return filename */
+    return file->__dirent.d_name;
+
 }
 

src/protocols/rdp/guac_rdpdr/rdpdr_fs.h

@@ -176,6 +176,12 @@ typedef struct guac_rdpdr_fs_file {
      */
     DIR* dir;
 
+    /**
+     * The last read dirent structure. This is used if traversing the contents
+     * of a directory.
+     */
+    struct dirent __dirent;
+
     /**
      * The size of this file, in bytes.
      */
@@ -238,5 +244,11 @@ int guac_rdpdr_fs_open(guac_rdpdr_device* device, const char* path,
  */
 void guac_rdpdr_fs_close(guac_rdpdr_device* device, int file_id);
 
+/**
+ * Returns the next filename within the directory having the given file ID,
+ * or NULL if no more files.
+ */
+const char* guac_rdpdr_fs_read_dir(guac_rdpdr_device* device, int file_id);
+
 #endif
 

src/protocols/rdp/guac_rdpdr/rdpdr_fs_messages.c

@@ -275,6 +275,9 @@ void guac_rdpdr_fs_process_notify_change_directory(guac_rdpdr_device* device,
 void guac_rdpdr_fs_process_query_directory(guac_rdpdr_device* device, wStream* input_stream,
         int file_id, int completion_id) {
 
+    /*guac_rdpdr_fs_data* data = (guac_rdpdr_fs_data*) device->data;
+    guac_rdpdr_fs_file* file = &(data->files[file_id]);*/
+
     int fs_information_class, initial_query;
     int path_length;
 
@@ -285,13 +288,26 @@ void guac_rdpdr_fs_process_query_directory(guac_rdpdr_device* device, wStream* i
 
     /* If this is the first query, the path is included after padding */
     if (initial_query) {
+
+        unsigned char* path;
+
         Stream_Seek(input_stream, 23);       /* Padding */
-        /* Path here */
+        path = Stream_Pointer(input_stream); /* Path */
-    }
 
         guac_client_log_info(device->rdpdr->client,
-            "Received dir query - class=0x%x, path_length=%i",
+                "Received initial dir query - class=0x%x, path_length=%i, path=%s",
-            fs_information_class, path_length);
+                fs_information_class, path_length, path);
+
+        /* Open directory */
+        /*file->dir = fdopendir(file->fd);*/
+
+        /* FIXME: Handle error */
+
+    }
+    else
+        guac_client_log_info(device->rdpdr->client,
+                "Received continued dir query - class=0x%x",
+                fs_information_class);
 
     /* Dispatch to appropriate class-specific handler */
     switch (fs_information_class) {