Add SetExtendedAttrs to Client

Add function to set extended attributes in the sftp client.

Signed-off-by: Peter Verraedt <peter@verraedt.be>

client.go

@@ -593,6 +593,16 @@ func (c *Client) Truncate(path string, size int64) error {
 	return c.setstat(path, sshFileXferAttrSize, uint64(size))
 }
 
+// SetExtendedAttrs sets the extended attributes of the named file.
+func (c *Client) SetExtendedAttrs(path string, extended []StatExtended) error {
+	type extendedAttrs struct {
+		Size     uint32
+		Extended []StatExtended
+	}
+	attrs := extendedAttrs{Size: uint32(len(extended)), Extended: extended}
+	return c.setstat(path, sshFileXferAttrExtended, attrs)
+}
+
 // Open opens the named file for reading. If successful, methods on the
 // returned file can be used for reading; the associated file descriptor
 // has mode O_RDONLY.