1 /* Test of pty.h and openpty function.
2 Copyright (C) 2009, 2010 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Simon Josefsson <simon@josefsson.org>, 2009
18 and Bruno Haible <bruno@clisp.org>, 2010. */
24 #include "signature.h"
25 SIGNATURE_CHECK (openpty, int, (int *, int *, char *, struct termios const *,
26 struct winsize const *));
40 /* Open a pseudo-terminal, as a master-slave pair. */
42 int res = openpty (&master, &slave, NULL, NULL, NULL);
45 fprintf (stderr, "openpty returned %d\n", res);
50 /* Set the terminal characteristics.
51 On Linux or MacOS X, they can be set on either the master or the slave;
52 the effect is the same. But on Solaris, they have to be set on the
53 master; tcgetattr on the slave fails. */
55 int tcfd = slave; /* You can try tcfd = master; here. */
56 struct termios attributes;
58 if (tcgetattr (tcfd, &attributes) < 0)
60 fprintf (stderr, "tcgetattr failed\n");
63 /* Enable canonical processing, including erase. */
64 attributes.c_lflag |= ECHO | ICANON | ECHOE;
65 attributes.c_cc[VERASE] = '\177';
66 if (tcsetattr (tcfd, TCSANOW, &attributes) < 0)
68 fprintf (stderr, "tcsetattr failed\n");
73 /* Write into the master side. */
75 static const char input[] = "Hello worst\177\177ld!\n";
77 if (write (master, input, strlen (input)) < (int) strlen (input))
79 fprintf (stderr, "write failed\n");
84 /* Read from the slave side. */
87 int res = read (slave, buf, sizeof (buf));
88 static const char expected[] = "Hello world!\n";
92 fprintf (stderr, "read failed\n");
95 if (!(res == strlen (expected)
96 && memcmp (buf, expected, strlen (expected)) == 0))
98 fprintf (stderr, "read result unexpected\n");
103 /* Close the master side before the slave side gets closed.
104 This is necessary on MacOS X 10.4.11. */