diff --git a/tests/test_paths.toml b/tests/test_paths.toml
index aefcd203..4b9d280c 100644
--- a/tests/test_paths.toml
+++ b/tests/test_paths.toml
@@ -74,6 +74,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "coffee/thai",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "coffee/drip",
@@ -94,6 +120,38 @@ code = '''
         lfs_file_open(&lfs, &file, "coffee/thai",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -265,6 +323,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "/coffee/thai",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "/coffee/drip",
@@ -285,6 +369,38 @@ code = '''
         lfs_file_open(&lfs, &file, "/coffee/thai",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -454,6 +570,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "//////coffee//////thai",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "//coffee//coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "///coffee///turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "////coffee////tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/////coffee/////vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "//////coffee//////thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "//coffee//coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "///coffee///turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "////coffee////tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/////coffee/////vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "//////coffee//////thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "/coffee/drip",
@@ -474,6 +616,38 @@ code = '''
         lfs_file_open(&lfs, &file, "//////coffee//////thai",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "//coffee//coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "///coffee///turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "////coffee////tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/////coffee/////vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "//////coffee//////thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "//coffee//coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "///coffee///turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "////coffee////tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/////coffee/////vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "//////coffee//////thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -668,6 +842,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "coffee/thai//////",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip/",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew//",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/turkish///",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/tubruk////",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese/////",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/thai//////",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip/",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew//",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/turkish///",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/tubruk////",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese/////",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/thai//////",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "coffee/drip/",
@@ -682,6 +882,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_NOTDIR;
         lfs_file_open(&lfs, &file, "coffee/thai//////",
                 LFS_O_RDONLY) => LFS_ERR_NOTDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip/",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew//",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/turkish///",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/tubruk////",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese/////",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/thai//////",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip/",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew//",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/turkish///",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/tubruk////",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese/////",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/thai//////",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
     }
 
     // dir open paths, only works on dirs!
@@ -949,6 +1175,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "/./././././coffee/./././././thai",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/./coffee/./coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/././coffee/././turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/./././coffee/./././tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/././././coffee/././././vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/./././././coffee/./././././thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/./coffee/./coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/././coffee/././turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/./././coffee/./././tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/././././coffee/././././vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/./././././coffee/./././././thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "/coffee/drip",
@@ -969,6 +1221,38 @@ code = '''
         lfs_file_open(&lfs, &file, "/./././././coffee/./././././thai",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/./coffee/./coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/././coffee/././turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/./././coffee/./././tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/././././coffee/././././vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/./././././coffee/./././././thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/./coffee/./coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/././coffee/././turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/./././coffee/./././tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/././././coffee/././././vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/./././././coffee/./././././thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -1178,8 +1462,34 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "coffee/thai/./././././.",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
-    } else {
-        lfs_file_t file;
+
+        lfs_file_open(&lfs, &file, "coffee/drip/.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew/./.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/turkish/././.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/tubruk/./././.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese/././././.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/thai/./././././.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip/.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew/./.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/turkish/././.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/tubruk/./././.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese/././././.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/thai/./././././.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    } else {
+        lfs_file_t file;
         lfs_file_open(&lfs, &file, "coffee/drip/.",
                 LFS_O_RDONLY) => LFS_ERR_NOTDIR;
         lfs_file_open(&lfs, &file, "coffee/coldbrew/./.",
@@ -1192,6 +1502,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_NOTDIR;
         lfs_file_open(&lfs, &file, "coffee/thai/./././././.",
                 LFS_O_RDONLY) => LFS_ERR_NOTDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip/.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew/./.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/turkish/././.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/tubruk/./././.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese/././././.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/thai/./././././.",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/drip/.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew/./.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/turkish/././.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/tubruk/./././.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/vietnamese/././././.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+        lfs_file_open(&lfs, &file, "coffee/thai/./././././.",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
     }
 
     // dir open paths, only works on dirs!
@@ -1503,6 +1839,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "/no/no/../../no/no/../../coffee/thai",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/no/../coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/no/../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/no/no/../../coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/no/no/../../coffee/no/../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/no/no/../../no/no/../../coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/../coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/no/../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/../../coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/../../coffee/no/../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/../../no/no/../../coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "/coffee/drip",
@@ -1523,6 +1885,38 @@ code = '''
         lfs_file_open(&lfs, &file, "/no/no/../../no/no/../../coffee/thai",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/no/../coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/no/../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/no/no/../../coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/no/no/../../coffee/no/../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/no/no/../../no/no/../../coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/../coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/no/../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/../../coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/../../coffee/no/../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/../../no/no/../../coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -1720,6 +2114,32 @@ code = '''
     lfs_file_open(&lfs, &file, "coffee/thai/../../../../../..",
             LFS_O_RDONLY) => LFS_ERR_INVAL;
 
+    lfs_file_open(&lfs, &file, "coffee/drip/..",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+    lfs_file_open(&lfs, &file, "coffee/coldbrew/../..",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+    lfs_file_open(&lfs, &file, "coffee/turkish/../../..",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "coffee/tubruk/../../../..",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "coffee/vietnamese/../../../../..",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "coffee/thai/../../../../../..",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+
+    lfs_file_open(&lfs, &file, "coffee/drip/..",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    lfs_file_open(&lfs, &file, "coffee/coldbrew/../..",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    lfs_file_open(&lfs, &file, "coffee/turkish/../../..",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "coffee/tubruk/../../../..",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "coffee/vietnamese/../../../../..",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "coffee/thai/../../../../../..",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+
     // dir open paths, only works on dirs!
     lfs_dir_t dir;
     lfs_dir_open(&lfs, &dir, "coffee/drip/..") => 0;
@@ -1923,6 +2343,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "/no/no/./.././../no/no/./.././../coffee/thai",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/no/./../coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/no/./../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../coffee/no/./../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../no/no/./.././../coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/./../coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/no/./../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../coffee/no/./../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../no/no/./.././../coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "/coffee/drip",
@@ -1943,6 +2389,38 @@ code = '''
         lfs_file_open(&lfs, &file, "/no/no/./.././../no/no/./.././../coffee/thai",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/no/./../coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/no/./../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../coffee/no/./../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../no/no/./.././../coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/./../coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/no/./../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../coffee/tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../coffee/no/./../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/no/no/./.././../no/no/./.././../coffee/thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -2113,6 +2591,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "/coffee/.../thai",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/.../drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/.../coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/.../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/.../tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/.../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/.../thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/.../drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "/coffee/.../drip",
@@ -2133,6 +2637,38 @@ code = '''
         lfs_file_open(&lfs, &file, "/coffee/.../thai",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/.../drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/.../coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/.../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/.../tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/.../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/.../thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/.../drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.../thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -2303,6 +2839,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "/coffee/......thai",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/.drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/..coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/...turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/....tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/.....vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "/coffee/......thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "/coffee/.drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/..coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/...turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/....tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.....vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/......thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "/coffee/.drip",
@@ -2323,19 +2885,51 @@ code = '''
         lfs_file_open(&lfs, &file, "/coffee/......thai",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
-    }
 
-    // dir open paths, only works on dirs!
-    if (DIR) {
-        lfs_dir_t dir;
-        lfs_dir_open(&lfs, &dir, "/coffee/.drip") => 0;
-        lfs_dir_close(&lfs, &dir) => 0;
-        lfs_dir_open(&lfs, &dir, "/coffee/..coldbrew") => 0;
-        lfs_dir_close(&lfs, &dir) => 0;
-        lfs_dir_open(&lfs, &dir, "/coffee/...turkish") => 0;
-        lfs_dir_close(&lfs, &dir) => 0;
-        lfs_dir_open(&lfs, &dir, "/coffee/....tubruk") => 0;
-        lfs_dir_close(&lfs, &dir) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/.drip",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/..coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/...turkish",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/....tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/.....vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "/coffee/......thai",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "/coffee/.drip",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/..coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/...turkish",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/....tubruk",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/.....vietnamese",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "/coffee/......thai",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    }
+
+    // dir open paths, only works on dirs!
+    if (DIR) {
+        lfs_dir_t dir;
+        lfs_dir_open(&lfs, &dir, "/coffee/.drip") => 0;
+        lfs_dir_close(&lfs, &dir) => 0;
+        lfs_dir_open(&lfs, &dir, "/coffee/..coldbrew") => 0;
+        lfs_dir_close(&lfs, &dir) => 0;
+        lfs_dir_open(&lfs, &dir, "/coffee/...turkish") => 0;
+        lfs_dir_close(&lfs, &dir) => 0;
+        lfs_dir_open(&lfs, &dir, "/coffee/....tubruk") => 0;
+        lfs_dir_close(&lfs, &dir) => 0;
         lfs_dir_open(&lfs, &dir, "/coffee/.....vietnamese") => 0;
         lfs_dir_close(&lfs, &dir) => 0;
         lfs_dir_open(&lfs, &dir, "/coffee/......thai") => 0;
@@ -2505,6 +3099,32 @@ code = '''
     lfs_file_open(&lfs, &file, "/no/../../../../coffee/thai",
             LFS_O_RDONLY) => LFS_ERR_INVAL;
 
+    lfs_file_open(&lfs, &file, "/../coffee/drip",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/../../coffee/coldbrew",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/../../../coffee/turkish",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/no/../../coffee/tubruk",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/no/../../../coffee/vietnamese",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/no/../../../../coffee/thai",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+
+    lfs_file_open(&lfs, &file, "/../coffee/drip",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/../../coffee/coldbrew",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/../../../coffee/turkish",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/no/../../coffee/tubruk",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/no/../../../coffee/vietnamese",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+    lfs_file_open(&lfs, &file, "/no/../../../../coffee/thai",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+
     // dir open paths, only works on dirs!
     lfs_dir_t dir;
     lfs_dir_open(&lfs, &dir, "/../coffee/drip") => LFS_ERR_INVAL;
@@ -2852,6 +3472,32 @@ code = '''
     lfs_file_open(&lfs, &file, "coffee_/thai",
             LFS_O_RDONLY) => LFS_ERR_NOENT;
 
+    lfs_file_open(&lfs, &file, "_offee/drip",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "c_ffee/coldbrew",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "co_fee/turkish",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "cof_ee/tubruk",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "_coffee/vietnamese",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "coffee_/thai",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOENT;
+
+    lfs_file_open(&lfs, &file, "_offee/drip",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "c_ffee/coldbrew",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "co_fee/turkish",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "cof_ee/tubruk",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "_coffee/vietnamese",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOENT;
+    lfs_file_open(&lfs, &file, "coffee_/thai",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOENT;
+
     // dir open paths, only works on dirs!
     lfs_dir_t dir;
     lfs_dir_open(&lfs, &dir, "_offee/drip") => LFS_ERR_NOENT;
@@ -3056,6 +3702,32 @@ code = '''
     lfs_file_open(&lfs, &file, "thai/coffee",
             LFS_O_RDONLY) => LFS_ERR_NOTDIR;
 
+    lfs_file_open(&lfs, &file, "drip/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "coldbrew/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "turkish/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "tubruk/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "vietnamese/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "thai/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_NOTDIR;
+
+    lfs_file_open(&lfs, &file, "drip/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "coldbrew/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "turkish/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "tubruk/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "vietnamese/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+    lfs_file_open(&lfs, &file, "thai/coffee",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_NOTDIR;
+
     // dir open paths, only works on dirs!
     lfs_dir_t dir;
     lfs_dir_open(&lfs, &dir, "drip/coffee") => LFS_ERR_NOTDIR;
@@ -3242,6 +3914,12 @@ code = '''
     lfs_file_open(&lfs, &file, "",
             LFS_O_RDONLY) => LFS_ERR_INVAL;
 
+    lfs_file_open(&lfs, &file, "",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_INVAL;
+
+    lfs_file_open(&lfs, &file, "",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_INVAL;
+
     // dir open empty, only works on dirs!
     lfs_dir_t dir;
     lfs_dir_open(&lfs, &dir, "") => LFS_ERR_INVAL;
@@ -3304,6 +3982,12 @@ code = '''
     lfs_file_open(&lfs, &file, "/",
             LFS_O_RDONLY) => LFS_ERR_ISDIR;
 
+    lfs_file_open(&lfs, &file, "/",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+    lfs_file_open(&lfs, &file, "/",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+
     // dir open root, only works on dirs!
     lfs_dir_t dir;
     lfs_dir_open(&lfs, &dir, "/") => 0;
@@ -3394,6 +4078,28 @@ code = '''
     lfs_file_open(&lfs, &file, "//",
             LFS_O_RDONLY) => LFS_ERR_ISDIR;
 
+    lfs_file_open(&lfs, &file, "/",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+    lfs_file_open(&lfs, &file, ".",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+    lfs_file_open(&lfs, &file, "./",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+    lfs_file_open(&lfs, &file, "/.",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+    lfs_file_open(&lfs, &file, "//",
+            LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+    lfs_file_open(&lfs, &file, "/",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    lfs_file_open(&lfs, &file, ".",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    lfs_file_open(&lfs, &file, "./",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    lfs_file_open(&lfs, &file, "/.",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    lfs_file_open(&lfs, &file, "//",
+            LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+
     // dir open root, only works on dirs!
     lfs_dir_t dir;
     lfs_dir_open(&lfs, &dir, "/") => 0;
@@ -3484,6 +4190,11 @@ code = '''
     struct lfs_info info;
     lfs_stat(&lfs, "littlefs", &info) => LFS_ERR_NOENT;
 
+    // file open littlefs, which shouldn't exist
+    lfs_file_t file;
+    lfs_file_open(&lfs, &file, "littlefs",
+            LFS_O_RDONLY) => LFS_ERR_NOENT;
+
     // dir open littlefs, which shouldn't exist
     lfs_dir_t dir;
     lfs_dir_open(&lfs, &dir, "littlefs") => LFS_ERR_NOENT;
@@ -3530,11 +4241,24 @@ code = '''
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "littlefs",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "littlefs",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "littlefs",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "littlefs",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "littlefs",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "littlefs",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open littlefs, only works on dirs!
@@ -3786,6 +4510,44 @@ code = '''
         sprintf(path, "%s/%s", c_name, f_name);
         lfs_file_open(&lfs, &file, path,
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        sprintf(path, "%s/%s", c_name, a_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        sprintf(path, "%s/%s", c_name, b_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        sprintf(path, "%s/%s", c_name, c_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        sprintf(path, "%s/%s", c_name, d_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        sprintf(path, "%s/%s", c_name, e_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        sprintf(path, "%s/%s", c_name, f_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        sprintf(path, "%s/%s", c_name, a_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, b_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, c_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, d_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, e_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, f_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         sprintf(path, "%s/%s", c_name, a_name);
@@ -3812,6 +4574,50 @@ code = '''
         lfs_file_open(&lfs, &file, path,
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        sprintf(path, "%s/%s", c_name, a_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        sprintf(path, "%s/%s", c_name, b_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        sprintf(path, "%s/%s", c_name, c_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        sprintf(path, "%s/%s", c_name, d_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        sprintf(path, "%s/%s", c_name, e_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        sprintf(path, "%s/%s", c_name, f_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        sprintf(path, "%s/%s", c_name, a_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, b_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, c_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, d_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, e_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        sprintf(path, "%s/%s", c_name, f_name);
+        lfs_file_open(&lfs, &file, path,
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -3943,7 +4749,7 @@ code = '''
     lfs_unmount(&lfs) => 0;
 '''
 
-# a quick utf8 test, though utf8 is easy to support
+# a quick utf8 test, utf8 is easy to support
 [cases.test_paths_utf8]
 defines.DIR = [false, true]
 code = '''
@@ -4018,6 +4824,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "coffee/โอเลี้ยง",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/dripcoffee",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/türkkahvesi",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/ꦏꦺꦴꦥꦶꦠꦸꦧꦿꦸꦏ꧀",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/càphêđá",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "coffee/โอเลี้ยง",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "coffee/dripcoffee",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/türkkahvesi",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/ꦏꦺꦴꦥꦶꦠꦸꦧꦿꦸꦏ꧀",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/càphêđá",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/โอเลี้ยง",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "coffee/dripcoffee",
@@ -4038,6 +4870,38 @@ code = '''
         lfs_file_open(&lfs, &file, "coffee/โอเลี้ยง",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "coffee/dripcoffee",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/türkkahvesi",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/ꦏꦺꦴꦥꦶꦠꦸꦧꦿꦸꦏ꧀",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/càphêđá",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "coffee/โอเลี้ยง",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "coffee/dripcoffee",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/coldbrew",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/türkkahvesi",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/ꦏꦺꦴꦥꦶꦠꦸꦧꦿꦸꦏ꧀",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/càphêđá",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "coffee/โอเลี้ยง",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -4207,19 +5071,45 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "ˈkɔ.fi/ʔoː˧.lia̯ŋ˦˥",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
-    } else {
-        lfs_file_t file;
+
         lfs_file_open(&lfs, &file, "ˈkɔ.fi/dɹɪpˈkɔ.fi",
-                LFS_O_RDONLY) => 0;
-        lfs_file_close(&lfs, &file) => 0;
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "ˈkɔ.fi/koʊldbɹuː",
-                LFS_O_RDONLY) => 0;
-        lfs_file_close(&lfs, &file) => 0;
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "ˈkɔ.fi/tyɾckɑhvɛˈsi",
-                LFS_O_RDONLY) => 0;
-        lfs_file_close(&lfs, &file) => 0;
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "ˈkɔ.fi/ˈko.piˈt̪up̚.rʊk̚",
-                LFS_O_RDONLY) => 0;
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/kaː˨˩fe˧˧ɗaː˧˥",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/ʔoː˧.lia̯ŋ˦˥",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/dɹɪpˈkɔ.fi",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/koʊldbɹuː",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/tyɾckɑhvɛˈsi",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/ˈko.piˈt̪up̚.rʊk̚",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/kaː˨˩fe˧˧ɗaː˧˥",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/ʔoː˧.lia̯ŋ˦˥",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+    } else {
+        lfs_file_t file;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/dɹɪpˈkɔ.fi",
+                LFS_O_RDONLY) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/koʊldbɹuː",
+                LFS_O_RDONLY) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/tyɾckɑhvɛˈsi",
+                LFS_O_RDONLY) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/ˈko.piˈt̪up̚.rʊk̚",
+                LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
         lfs_file_open(&lfs, &file, "ˈkɔ.fi/kaː˨˩fe˧˧ɗaː˧˥",
                 LFS_O_RDONLY) => 0;
@@ -4227,6 +5117,38 @@ code = '''
         lfs_file_open(&lfs, &file, "ˈkɔ.fi/ʔoː˧.lia̯ŋ˦˥",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/dɹɪpˈkɔ.fi",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/koʊldbɹuː",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/tyɾckɑhvɛˈsi",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/ˈko.piˈt̪up̚.rʊk̚",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/kaː˨˩fe˧˧ɗaː˧˥",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/ʔoː˧.lia̯ŋ˦˥",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/dɹɪpˈkɔ.fi",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/koʊldbɹuː",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/tyɾckɑhvɛˈsi",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/ˈko.piˈt̪up̚.rʊk̚",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/kaː˨˩fe˧˧ɗaː˧˥",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "ˈkɔ.fi/ʔoː˧.lia̯ŋ˦˥",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -4396,6 +5318,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "c o f f e e/t h a i",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "c o f f e e/d r i p",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "c o f f e e/c o l d b r e w",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "c o f f e e/t u r k i s h",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "c o f f e e/t u b r u k",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "c o f f e e/v i e t n a m e s e",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "c o f f e e/t h a i",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "c o f f e e/d r i p",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/c o l d b r e w",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/t u r k i s h",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/t u b r u k",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/v i e t n a m e s e",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/t h a i",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "c o f f e e/d r i p",
@@ -4416,6 +5364,38 @@ code = '''
         lfs_file_open(&lfs, &file, "c o f f e e/t h a i",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "c o f f e e/d r i p",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "c o f f e e/c o l d b r e w",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "c o f f e e/t u r k i s h",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "c o f f e e/t u b r u k",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "c o f f e e/v i e t n a m e s e",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "c o f f e e/t h a i",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "c o f f e e/d r i p",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/c o l d b r e w",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/t u r k i s h",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/t u b r u k",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/v i e t n a m e s e",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "c o f f e e/t h a i",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -4587,6 +5567,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, " /      ",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, " / ",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, " /  ",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, " /   ",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, " /    ",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, " /     ",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, " /      ",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, " / ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /  ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /   ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /    ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /     ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /      ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, " / ",
@@ -4607,6 +5613,38 @@ code = '''
         lfs_file_open(&lfs, &file, " /      ",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, " / ",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, " /  ",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, " /   ",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, " /    ",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, " /     ",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, " /      ",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, " / ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /  ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /   ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /    ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /     ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, " /      ",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -4778,6 +5816,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "\x0c/\x06",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "\x0c/\x01",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x0c/\x02",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x0c/\x03",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x0c/\x04",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x0c/\x05",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x0c/\x06",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "\x0c/\x01",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x02",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x03",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x04",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x05",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x06",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "\x0c/\x01",
@@ -4798,6 +5862,38 @@ code = '''
         lfs_file_open(&lfs, &file, "\x0c/\x06",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "\x0c/\x01",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x0c/\x02",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x0c/\x03",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x0c/\x04",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x0c/\x05",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x0c/\x06",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "\x0c/\x01",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x02",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x03",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x04",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x05",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x0c/\x06",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -4969,6 +6065,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f\x7f",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "\x7f/\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "\x7f/\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "\x7f/\x7f",
@@ -4989,6 +6111,38 @@ code = '''
         lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f\x7f",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "\x7f/\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "\x7f/\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\x7f/\x7f\x7f\x7f\x7f\x7f\x7f",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -5162,6 +6316,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "\xc0/\xf0",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "\xc0/\xa0",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xc0/\xb0",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xc0/\xc0",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xc0/\xd0",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xc0/\xe0",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xc0/\xf0",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "\xc0/\xa0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xb0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xc0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xd0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xe0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xf0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "\xc0/\xa0",
@@ -5182,6 +6362,38 @@ code = '''
         lfs_file_open(&lfs, &file, "\xc0/\xf0",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "\xc0/\xa0",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xc0/\xb0",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xc0/\xc0",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xc0/\xd0",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xc0/\xe0",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xc0/\xf0",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "\xc0/\xa0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xb0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xc0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xd0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xe0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xc0/\xf0",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!
@@ -5355,6 +6567,32 @@ code = '''
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
         lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff\xff",
                 LFS_O_RDONLY) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "\xff/\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
+
+        lfs_file_open(&lfs, &file, "\xff/\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     } else {
         lfs_file_t file;
         lfs_file_open(&lfs, &file, "\xff/\xff",
@@ -5375,6 +6613,38 @@ code = '''
         lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff\xff",
                 LFS_O_RDONLY) => 0;
         lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "\xff/\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT) => 0;
+        lfs_file_close(&lfs, &file) => 0;
+
+        lfs_file_open(&lfs, &file, "\xff/\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
+        lfs_file_open(&lfs, &file, "\xff/\xff\xff\xff\xff\xff\xff",
+                LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
     }
 
     // dir open paths, only works on dirs!