Handle stdin pipe closing on us

If xiogen is flooding requests across qarsh and
xdoio decides to stop, we need to handle that gracefully.
Also, making the pipe non-blocking was not a good idea, xdoio
gets the read error EAGAIN and stops there.

1 files changed, 6 insertions, 0 deletions

diff --git a/qarsh.c b/qarsh.c
index 51a876b..2683591 100644
--- a/qarsh.c
+++ b/qarsh.c
@@ -395,6 +395,12 @@ run_remote_cmd(char *cmdline)
 						fprintf(stderr, "ERROR: Received data allow for fd %d\n",
 								qp->qp_dallow.qp_remfd);
 					}
+				} else if (qp->qp_type == QP_RETURNCODE) { /* qarshd hit an error while writing to stdin */
+					fprintf(stderr, "Remote command hit I/O error: %s\n", qp->qp_returncode.qp_strerror);
+					close(fileno(stdin));
+					allowed_in = -1;
+				} else {
+					fprintf(stderr, "Unexpected packet type %s\n", qp_packet_type(qp->qp_type));
 				}
 				qpfree(qp);
 				nset--;