[LTP] [PATCH 07/10] Add ptem06 test

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

Verify that it's possible to open a pseudo-terminal via /dev/ptmx,
to obtain a slave device and to set baudrate to B0 (which means hang
up).

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 runtest/pty                     |  1 +
 testcases/kernel/pty/.gitignore |  1 +
 testcases/kernel/pty/ptem06.c   | 59 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+)

diff --git a/runtest/pty b/runtest/pty
index deb04c3f5725647a32f457eaed638eb7071ab4db..6343da391ba17627abaf09aa5a23509e4f745556 100644
--- a/runtest/pty
+++ b/runtest/pty
@@ -11,5 +11,6 @@ ptem02 ptem02
 ptem03 ptem03
 ptem04 ptem04
 ptem05 ptem05
+ptem06 ptem06
 hangup01 hangup01
 
diff --git a/testcases/kernel/pty/.gitignore b/testcases/kernel/pty/.gitignore
index ef5751907cad087f5e33132b52a374b52ee7905a..630d7fcf7b0e0adfbc21b793fa456d6c5f5e4ad9 100644
--- a/testcases/kernel/pty/.gitignore
+++ b/testcases/kernel/pty/.gitignore
@@ -4,6 +4,7 @@
 /ptem03
 /ptem04
 /ptem05
+/ptem06
 /pty01
 /pty02
 /pty03
diff --git a/testcases/kernel/pty/ptem06.c b/testcases/kernel/pty/ptem06.c
new file mode 100644
index 0000000000000000000000000000000000000000..be34000e63de48560fa7ae03f72c986e26f7851d
--- /dev/null
+++ b/testcases/kernel/pty/ptem06.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) International Business Machines  Corp., 2002
+ * Copyright (c) 2020 Petr Vorel <pvorel@suse.cz>
+ * Copyright (C) 2024 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Verify that it's possible to open a pseudo-terminal via /dev/ptmx, to obtain
+ * a slave device and to set baudrate to B0 (which means hang up).
+ */
+
+#define _GNU_SOURCE
+
+#include <termios.h>
+#include "tst_test.h"
+
+#define MASTERCLONE "/dev/ptmx"
+
+static void run(void)
+{
+	int masterfd, slavefd;
+	struct termios termios;
+	char *slavename;
+
+	masterfd = SAFE_OPEN(MASTERCLONE, O_RDWR);
+
+	slavename = ptsname(masterfd);
+	if (slavename == NULL)
+		tst_res(TFAIL, "Can't get slave device location");
+	else
+		tst_res(TPASS, "pts device location is %s", slavename);
+
+	TST_EXP_PASS(grantpt(masterfd));
+	TST_EXP_PASS(unlockpt(masterfd));
+
+	slavefd = SAFE_OPEN(slavename, O_RDWR);
+
+	TST_EXP_PASS(ioctl(slavefd, TCGETS, &termios));
+	termios.c_cflag &= ~CBAUD;
+	termios.c_cflag |= B0 & CBAUD;
+	TST_EXP_PASS(ioctl(slavefd, TCSETS, &termios));
+
+	SAFE_CLOSE(slavefd);
+	SAFE_CLOSE(masterfd);
+}
+
+static void setup(void)
+{
+	if (access(MASTERCLONE, F_OK))
+		tst_brk(TBROK, "%s device doesn't exist", MASTERCLONE);
+}
+
+static struct tst_test test = {
+	.test_all = run,
+	.setup = setup,
+};

-- 
2.43.0