[PATCH 4/6] tools/libxs: Track whether we're using a socket or file

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

It will determine whether to use writev() or sendmsg().

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>
CC: Juergen Gross <jgross@xxxxxxxx>
---
 tools/libs/store/xs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/libs/store/xs.c b/tools/libs/store/xs.c
index 96ea2b192924..f4edeb05f03b 100644
--- a/tools/libs/store/xs.c
+++ b/tools/libs/store/xs.c
@@ -65,6 +65,9 @@ struct xs_stored_msg {
 struct xs_handle {
        /* Communications channel to xenstore daemon. */
        int fd;
+
+       bool is_socket; /* is @fd a file or socket? */
+
        Xentoolcore__Active_Handle tc_ah; /* for restrict */
 
        /*
@@ -305,6 +308,8 @@ static struct xs_handle *get_handle(const char *connect_to)
        if (h->fd == -1)
                goto err;
 
+       h->is_socket = S_ISSOCK(buf.st_mode);
+
        XEN_TAILQ_INIT(&h->reply_list);
        XEN_TAILQ_INIT(&h->watch_list);
 
-- 
2.39.2