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 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (c) 1983, 1993
8 * The Regents of the University of California. All rights reserved.
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 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include "tip.h"
36
37 static jmp_buf deadline;
38 static int deadfl;
39
40 static void dead(int);
41
42 /*ARGSUSED*/
43 static void
dead(int signo)44 dead(int signo)
45 {
46 deadfl = 1;
47 longjmp(deadline, 1);
48 }
49
50 long
hunt(char * name)51 hunt(char *name)
52 {
53 char *cp;
54 sig_t f;
55
56 f = signal(SIGALRM, dead);
57 while ((cp = getremote(name))) {
58 deadfl = 0;
59 uucplock = strrchr(cp, '/');
60 if (uucplock == NULL)
61 uucplock = cp;
62 else
63 uucplock++;
64
65 if (uu_lock(uucplock) < 0)
66 continue;
67 /*
68 * Straight through call units, such as the BIZCOMP,
69 * VADIC and the DF, must indicate they're hardwired in
70 * order to get an open file descriptor placed in FD.
71 * Otherwise, as for a DN-11, the open will have to
72 * be done in the "open" routine.
73 */
74 if (!HW)
75 break;
76 if (setjmp(deadline) == 0) {
77 alarm(10);
78 FD = open(cp, (O_RDWR |
79 (boolean(value(DC)) ? O_NONBLOCK : 0)));
80 }
81 alarm(0);
82 if (FD < 0) {
83 perror(cp);
84 deadfl = 1;
85 }
86 if (!deadfl) {
87 struct termios cntrl;
88
89 tcgetattr(FD, &cntrl);
90 if (!boolean(value(DC)))
91 cntrl.c_cflag |= HUPCL;
92 tcsetattr(FD, TCSAFLUSH, &cntrl);
93 ioctl(FD, TIOCEXCL, 0);
94 signal(SIGALRM, SIG_DFL);
95 return ((long)cp);
96 }
97 (void)uu_unlock(uucplock);
98 }
99 signal(SIGALRM, f);
100 return (deadfl ? -1 : (long)cp);
101 }
102