[master] 6265345 Enable echo on the pty

[Poul-Henning Kamp]

commit 626534577acdcc4607398af0b5af226b26d4179e
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Sat Jan 13 17:16:03 2018 +0000

    Enable echo on the pty

diff --git a/bin/varnishtest/vtc_process.c b/bin/varnishtest/vtc_process.c
index 3d5903d..37fa4b3 100644
--- a/bin/varnishtest/vtc_process.c
+++ b/bin/varnishtest/vtc_process.c
@@ -344,7 +344,7 @@ process_init_term(struct process *p, int fd)
 	memset(&tt, 0, sizeof tt);
 	tt.c_cflag = CREAD | CS8 | HUPCL;
 	tt.c_iflag = BRKINT | ICRNL | IMAXBEL | IXON | IXANY;
-	tt.c_lflag = ICANON | ISIG | IEXTEN;
+	tt.c_lflag = ICANON | ISIG | IEXTEN | ECHO | ECHOE | ECHOKE | ECHOCTL;
 	tt.c_oflag = OPOST | ONLCR;
 	i = cfsetispeed(&tt, B9600);
 	if (i)
@@ -512,9 +512,9 @@ process_write(const struct process *p, const char *text)
 	len = strlen(text);
 	vtc_log(p->vl, 4, "Writing %d bytes", len);
 	r = write(p->fd_term, text, len);
-	if (r < 0)
-		vtc_fatal(p->vl, "Failed to write: %s (%d)",
-		    strerror(errno), errno);
+	if (r != len)
+		vtc_fatal(p->vl, "Failed to write: len=%d %s (%d)",
+		    len, strerror(errno), errno);
 }
 
 static void