1/*	$OpenBSD: hunt.c,v 1.13 2006/03/17 19:39:46 deraadt Exp $	*/
2/*	$NetBSD: hunt.c,v 1.6 1997/04/20 00:02:10 mellon Exp $	*/
3
4/*
5 * Copyright (c) 1983, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)hunt.c	8.1 (Berkeley) 6/6/93";
39static const char rcsid[] = "$OpenBSD: hunt.c,v 1.13 2006/03/17 19:39:46 deraadt Exp $";
40#endif
41#endif /* not lint */
42
43#include "tip.h"
44
45static	jmp_buf deadline;
46static	int deadfl;
47
48static void	dead(int);
49
50/*ARGSUSED*/
51static void
52dead(int signo)
53{
54	deadfl = 1;
55	longjmp(deadline, 1);
56}
57
58long
59hunt(char *name)
60{
61	char *cp;
62	sig_t f;
63
64	f = signal(SIGALRM, dead);
65	while ((cp = getremote(name))) {
66		deadfl = 0;
67		uucplock = strrchr(cp, '/');
68		if (uucplock == NULL)
69			uucplock = cp;
70		else
71			uucplock++;
72
73		if (uu_lock(uucplock) < 0)
74			continue;
75		/*
76		 * Straight through call units, such as the BIZCOMP,
77		 * VADIC and the DF, must indicate they're hardwired in
78		 *  order to get an open file descriptor placed in FD.
79		 * Otherwise, as for a DN-11, the open will have to
80		 *  be done in the "open" routine.
81		 */
82		if (!HW)
83			break;
84		if (setjmp(deadline) == 0) {
85			alarm(10);
86			FD = open(cp, (O_RDWR |
87			    (boolean(value(DC)) ? O_NONBLOCK : 0)));
88		}
89		alarm(0);
90		if (FD < 0) {
91			perror(cp);
92			deadfl = 1;
93		}
94		if (!deadfl) {
95			struct termios cntrl;
96
97			tcgetattr(FD, &cntrl);
98			if (!boolean(value(DC)))
99				cntrl.c_cflag |= HUPCL;
100			tcsetattr(FD, TCSAFLUSH, &cntrl);
101			ioctl(FD, TIOCEXCL, 0);
102			signal(SIGALRM, SIG_DFL);
103			return ((long)cp);
104		}
105		(void)uu_unlock(uucplock);
106	}
107	signal(SIGALRM, f);
108	return (deadfl ? -1 : (long)cp);
109}
110