[nautilus] file-operations: Skip free space check when destination is a ramfs

[António Fernandes <antoniof src gnome org>]

commit 01bb402f5f8aabe33f3faf2dbca5d6ba33202987
Author: Alister Sanders <alister sugol org>
Date:   Fri Jun 3 05:06:13 2022 +1200

    file-operations: Skip free space check when destination is a ramfs
    
    ramfs always reports a size of 0 since there is no size limit. This
    commit checks whether the destination fs is ramfs, and skips the free
    space check if it is. This avoids showing an erroneous 'Not enough space
    on the destination' dialog.
    
    Fixes #2271

 src/nautilus-file-operations.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
---
diff --git a/src/nautilus-file-operations.c b/src/nautilus-file-operations.c
index c6906bf29..8f5160a97 100644
--- a/src/nautilus-file-operations.c
+++ b/src/nautilus-file-operations.c
@@ -3726,6 +3726,7 @@ verify_destination (CommonJob  *job,
 {
     GFileInfo *info, *fsinfo;
     GError *error;
+    const char *fs_type;
     guint64 free_size;
     guint64 size_difference;
     char *primary, *secondary, *details;
@@ -3844,9 +3845,11 @@ retry:
 
     fsinfo = g_file_query_filesystem_info (dest,
                                            G_FILE_ATTRIBUTE_FILESYSTEM_FREE ","
-                                           G_FILE_ATTRIBUTE_FILESYSTEM_READONLY,
+                                           G_FILE_ATTRIBUTE_FILESYSTEM_READONLY ","
+                                           G_FILE_ATTRIBUTE_FILESYSTEM_TYPE,
                                            job->cancellable,
                                            NULL);
+
     if (fsinfo == NULL)
     {
         /* All sorts of things can go wrong getting the fs info (like not supported)
@@ -3855,7 +3858,13 @@ retry:
         return;
     }
 
+    /* ramfs reports a free size, but that size is always 0. If we're copying to ramfs,
+     * skip the free size check. */
+    fs_type = g_file_info_get_attribute_string (fsinfo,
+                                                G_FILE_ATTRIBUTE_FILESYSTEM_TYPE);
+
     if (required_size > 0 &&
+        g_strcmp0 (fs_type, "ramfs") != 0 &&
         g_file_info_has_attribute (fsinfo, G_FILE_ATTRIBUTE_FILESYSTEM_FREE))
     {
         free_size = g_file_info_get_attribute_uint64 (fsinfo,