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fileinfo: Add a G_FILE_ATTRIBUTE_STANDARD_IS_VOLATILE attribute

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This is meant for opaque, non-POSIX-like backends to indicate that the
URI is not persistent. Applications should look at
G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET for the persistent URI.
Examples of such backends could be a portal for letting sandboxed
applications access the file-system, or a database-backed storage like
Google Drive.

In these cases, the user visible file and folder names are different
from the real identifiers, used by the backend. So, a request to
create google-drive://user@gmail.com/foo/New\ File, would actually
lead to google-drive://user@gmail.com/foo/bar on the server even though
the user visible name is still "New File". Since the server-defined URI
is persistent and sanity-checked by the backend, it is recommended that
applications switch to it as soon as possible. Backends will try to
keep a mapping from "fake" to "real" URIs, but those are only on a
best effort basis. They might not be persistent or have the same
guarantees as the "real" URIs.

https://bugzilla.gnome.org/show_bug.cgi?id=741602
This commit is contained in:
Debarshi Ray
2015-06-25 10:05:53 +02:00
parent 4a076032cf
commit fa0f51ddf8
4 changed files with 17 additions and 0 deletions
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gio/gfileinfo.c
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@@ -203,6 +203,7 @@ ensure_attribute_hash (void)
REGISTER_ATTRIBUTE (STANDARD_TARGET_URI);
REGISTER_ATTRIBUTE (STANDARD_SORT_ORDER);
REGISTER_ATTRIBUTE (STANDARD_SYMBOLIC_ICON);
REGISTER_ATTRIBUTE (STANDARD_IS_VOLATILE);
REGISTER_ATTRIBUTE (ETAG_VALUE);
REGISTER_ATTRIBUTE (ID_FILE);
REGISTER_ATTRIBUTE (ID_FILESYSTEM);