Don't write input if ICANON is enabled. Also, write one byte at a time.

1 files changed, 7 insertions, 1 deletions

diff --git a/regress/bin/ksh/edit/edit.c b/regress/bin/ksh/edit/edit.c
index 0e707af294c..247e0b0ab2e 100644
--- a/regress/bin/ksh/edit/edit.c
+++ b/regress/bin/ksh/edit/edit.c
@@ -34,6 +34,7 @@ int
 main(int argc, char *argv[])
 {
 	char		in[BUFSIZ], out[BUFSIZ];
+	struct termios	tio;
 	struct pollfd	pfd;
 	struct winsize	ws;
 	pid_t		pid;
@@ -100,7 +101,12 @@ main(int argc, char *argv[])
 			if (nread == 0)
 				continue;
 
-			n = write(ptyfd, &in[nwrite], nin - nwrite);
+			if (tcgetattr(ptyfd, &tio) == -1)
+				err(1, "tcgetattr");
+			if ((tio.c_lflag & ICANON) == ICANON)
+				continue;
+
+			n = write(ptyfd, &in[nwrite], 1);
 			if (n == -1)
 				err(1, "write");
 			nwrite += n;