1 /* $OpenBSD: hunt.c,v 1.10 2003/06/03 02:56:18 millert 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 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)hunt.c 8.1 (Berkeley) 6/6/93";
36 #endif
37 static const char rcsid[] = "$OpenBSD: hunt.c,v 1.10 2003/06/03 02:56:18 millert Exp $";
38 #endif /* not lint */
39
40 #include "tip.h"
41
42 extern char *getremote();
43
44 static jmp_buf deadline;
45 static int deadfl;
46
47 void
dead()48 dead()
49 {
50 deadfl = 1;
51 longjmp(deadline, 1);
52 }
53
54 long
hunt(name)55 hunt(name)
56 char *name;
57 {
58 char *cp;
59 sig_t f;
60
61 f = signal(SIGALRM, dead);
62 while ((cp = getremote(name))) {
63 deadfl = 0;
64 uucplock = strrchr(cp, '/');
65 if (uucplock == NULL)
66 uucplock = cp;
67 else
68 uucplock++;
69
70 if (uu_lock(uucplock) < 0)
71 continue;
72 /*
73 * Straight through call units, such as the BIZCOMP,
74 * VADIC and the DF, must indicate they're hardwired in
75 * order to get an open file descriptor placed in FD.
76 * Otherwise, as for a DN-11, the open will have to
77 * be done in the "open" routine.
78 */
79 if (!HW)
80 break;
81 if (setjmp(deadline) == 0) {
82 alarm(10);
83 FD = open(cp, (O_RDWR |
84 (boolean(value(DC)) ? O_NONBLOCK : 0)));
85 }
86 alarm(0);
87 if (FD < 0) {
88 perror(cp);
89 deadfl = 1;
90 }
91 if (!deadfl) {
92 struct termios cntrl;
93
94 tcgetattr(FD, &cntrl);
95 if (!boolean(value(DC)))
96 cntrl.c_cflag |= HUPCL;
97 tcsetattr(FD, TCSAFLUSH, &cntrl);
98 ioctl(FD, TIOCEXCL, 0);
99 signal(SIGALRM, SIG_DFL);
100 return ((long)cp);
101 }
102 (void)uu_unlock(uucplock);
103 }
104 signal(SIGALRM, f);
105 return (deadfl ? -1 : (long)cp);
106 }
107