wimlib_mount(): Refuse to mount split wim read-write

[wimlib] / src / mount.c

diff --git a/src/mount.c b/src/mount.c
index 54c7b0990d8726d75cb7e884e38af238fb5b5b61..4dc28f1fbc2c8fee36904530dff7c565b44c5d81 100644 (file)
--- a/src/mount.c
+++ b/src/mount.c
@@ -497,11 +497,9 @@ out_delete_staging_file:
 }
 
 /*
- * Creates a randomly named staging directory and returns its name into the
- * static variable staging_dir_name.
- *
- * If the staging directory cannot be created, staging_dir_name is set to NULL.
- * */
+ * Creates a randomly named staging directory and saves its name in the
+ * filesystem context structure.
+ */
 static int make_staging_dir(struct wimfs_context *ctx)
 {
        /* XXX Give the user an option of where to stage files */
@@ -1856,6 +1854,11 @@ WIMLIBAPI int wimlib_mount(WIMStruct *wim, int image, const char *dir,
        if (ret != 0)
                return ret;
 
+       if ((flags & WIMLIB_MOUNT_FLAG_READWRITE) && (wim->hdr.total_parts != 1)) {
+               ERROR("Cannot mount a split WIM read-write");
+               return WIMLIB_ERR_SPLIT_UNSUPPORTED;
+       }
+
        if (num_additional_swms) {
                ret = new_joined_lookup_table(wim, additional_swms,
                                              num_additional_swms,