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 44 dead(int signo) 45 { 46 deadfl = 1; 47 longjmp(deadline, 1); 48 } 49 50 long 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