1 /* $NetBSD: hunt.c,v 1.3 1994/12/08 09:30:50 jtc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)hunt.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: hunt.c,v 1.3 1994/12/08 09:30:50 jtc Exp $"; 41 #endif /* not lint */ 42 43 #include "tip.h" 44 45 extern char *getremote(); 46 extern char *rindex(); 47 48 static jmp_buf deadline; 49 static int deadfl; 50 51 void 52 dead() 53 { 54 deadfl = 1; 55 longjmp(deadline, 1); 56 } 57 58 hunt(name) 59 char *name; 60 { 61 register char *cp; 62 sig_t f; 63 64 f = signal(SIGALRM, dead); 65 while (cp = getremote(name)) { 66 deadfl = 0; 67 uucplock = rindex(cp, '/')+1; 68 if (uu_lock(uucplock) < 0) 69 continue; 70 /* 71 * Straight through call units, such as the BIZCOMP, 72 * VADIC and the DF, must indicate they're hardwired in 73 * order to get an open file descriptor placed in FD. 74 * Otherwise, as for a DN-11, the open will have to 75 * be done in the "open" routine. 76 */ 77 if (!HW) 78 break; 79 if (setjmp(deadline) == 0) { 80 alarm(10); 81 FD = open(cp, O_RDWR); 82 } 83 alarm(0); 84 if (FD < 0) { 85 perror(cp); 86 deadfl = 1; 87 } 88 if (!deadfl) { 89 ioctl(FD, TIOCEXCL, 0); 90 ioctl(FD, TIOCHPCL, 0); 91 signal(SIGALRM, SIG_DFL); 92 return ((int)cp); 93 } 94 (void)uu_unlock(uucplock); 95 } 96 signal(SIGALRM, f); 97 return (deadfl ? -1 : (int)cp); 98 } 99