save metadata to extended file attributes

It is often convinient to track back the source of a once downloaded
file; this patch makes curl store the source URL and other metadata
alongside the retrieved file by using the extended attributes (if
supported by the file system and enabled by --xattr).

1 files changed, 1 insertions, 0 deletions

diff --git a/src/xattr.h b/src/xattr.h
new file mode 100644
index 000000000..30673973c
--- /dev/null
+++ b/src/xattr.h
@@ -0,0 +1 @@
+int write_xattr( CURL *curl, const char *filename );