btrfs-progs: do not send stream into a terminal

Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/cmds-send.c b/cmds-send.c
index 59522c3..29a7dd3 100644 (file)
--- a/cmds-send.c
+++ b/cmds-send.c
@@ -429,6 +429,11 @@ int cmd_send_start(int argc, char **argv)
        memset(&send, 0, sizeof(send));
        send.dump_fd = fileno(stdout);
 
+       if (isatty(send.dump_fd)) {
+               fprintf(stderr, "ERROR: not dumping send stream into a terminal, redirect it into a file\n");
+               return 1;
+       }
+
        while ((c = getopt(argc, argv, "vf:i:p:")) != -1) {
                switch (c) {
                case 'v':