From 338b83a3a7207701d411d0ca876cc4ef9569004b Mon Sep 17 00:00:00 2001
From: Michael Jumper <mike.jumper@guac-dev.org>
Date: Wed, 11 Dec 2013 01:25:40 -0800
Subject: [PATCH] Ignore write access request if file is a directory.

---
 src/protocols/rdp/rdp_fs.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/protocols/rdp/rdp_fs.c b/src/protocols/rdp/rdp_fs.c
index 287da3ef..4f28f52c 100644
--- a/src/protocols/rdp/rdp_fs.c
+++ b/src/protocols/rdp/rdp_fs.c
@@ -264,6 +264,7 @@ int guac_rdp_fs_open(guac_rdp_fs* fs, const char* path,
     /* Create directory first, if necessary */
     if ((create_options & FILE_DIRECTORY_FILE) && (flags & O_CREAT)) {
 
+        /* Create directory */
         if (mkdir(real_path, S_IRWXU)) {
             if (errno != EEXIST || (flags & O_EXCL)) {
                 GUAC_RDP_DEBUG(1, "mkdir() failed: %s", strerror(errno));
@@ -281,6 +282,14 @@ int guac_rdp_fs_open(guac_rdp_fs* fs, const char* path,
 
     /* Open file */
     fd = open(real_path, flags, S_IRUSR | S_IWUSR);
+
+    /* If file open failed as we're trying to write a dir, retry as read-only */
+    if (fd == -1 && errno == EISDIR) {
+        flags &= ~(O_WRONLY | O_RDWR);
+        flags |= O_RDONLY;
+        fd = open(real_path, flags, S_IRUSR | S_IWUSR);
+    }
+
     if (fd == -1) {
         GUAC_RDP_DEBUG(1, "open() failed: %s", strerror(errno));
         return guac_rdp_fs_get_errorcode(errno);