1 /* $NetBSD: pty.c,v 1.4 2014/01/08 02:17:30 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: pty.c,v 1.4 2014/01/08 02:17:30 christos Exp $"); 35 #endif /* LIBC_SCCS and not lint */ 36 37 #include "namespace.h" 38 #include <fcntl.h> 39 #include <string.h> 40 #include <errno.h> 41 #include <stdlib.h> 42 #include <sys/ioctl.h> 43 44 int 45 grantpt(int fildes) 46 { 47 48 return ioctl(fildes, TIOCGRANTPT, 0); 49 } 50 51 int 52 /*ARGSUSED*/ 53 unlockpt(int fildes) 54 { 55 56 return 0; 57 } 58 59 char * 60 ptsname(int fildes) 61 { 62 static struct ptmget pm; 63 64 if (ioctl(fildes, TIOCPTSNAME, &pm) == -1) 65 return NULL; 66 67 return pm.sn; 68 } 69 70 int 71 ptsname_r(int fildes, char *buf, size_t buflen) { 72 struct ptmget pm; 73 74 if (buf == NULL) 75 return EINVAL; 76 if (ioctl(fildes, TIOCPTSNAME, &pm) == -1) 77 return errno; 78 if (strlcpy(buf, pm.sn, buflen) > buflen) 79 return ERANGE; 80 return 0; 81 } 82