1 /* $NetBSD: hunt.c,v 1.4 1994/12/24 17:56:27 cgd 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 1.4 1994/12/24 17:56:27 cgd 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 long 59 hunt(name) 60 char *name; 61 { 62 register char *cp; 63 sig_t f; 64 65 f = signal(SIGALRM, dead); 66 while (cp = getremote(name)) { 67 deadfl = 0; 68 uucplock = rindex(cp, '/')+1; 69 if (uu_lock(uucplock) < 0) 70 continue; 71 /* 72 * Straight through call units, such as the BIZCOMP, 73 * VADIC and the DF, must indicate they're hardwired in 74 * order to get an open file descriptor placed in FD. 75 * Otherwise, as for a DN-11, the open will have to 76 * be done in the "open" routine. 77 */ 78 if (!HW) 79 break; 80 if (setjmp(deadline) == 0) { 81 alarm(10); 82 FD = open(cp, O_RDWR); 83 } 84 alarm(0); 85 if (FD < 0) { 86 perror(cp); 87 deadfl = 1; 88 } 89 if (!deadfl) { 90 ioctl(FD, TIOCEXCL, 0); 91 ioctl(FD, TIOCHPCL, 0); 92 signal(SIGALRM, SIG_DFL); 93 return ((long)cp); 94 } 95 (void)uu_unlock(uucplock); 96 } 97 signal(SIGALRM, f); 98 return (deadfl ? -1 : (long)cp); 99 } 100