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 * 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 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)hunt.c 8.1 (Berkeley) 6/6/93"; 39 static const char rcsid[] = "$OpenBSD: hunt.c,v 1.13 2006/03/17 19:39:46 deraadt Exp $"; 40 #endif 41 #endif /* not lint */ 42 43 #include "tip.h" 44 45 static jmp_buf deadline; 46 static int deadfl; 47 48 static void dead(int); 49 50 /*ARGSUSED*/ 51 static void 52 dead(int signo) 53 { 54 deadfl = 1; 55 longjmp(deadline, 1); 56 } 57 58 long 59 hunt(char *name) 60 { 61 char *cp; 62 sig_t f; 63 64 f = signal(SIGALRM, dead); 65 while ((cp = getremote(name))) { 66 deadfl = 0; 67 uucplock = strrchr(cp, '/'); 68 if (uucplock == NULL) 69 uucplock = cp; 70 else 71 uucplock++; 72 73 if (uu_lock(uucplock) < 0) 74 continue; 75 /* 76 * Straight through call units, such as the BIZCOMP, 77 * VADIC and the DF, must indicate they're hardwired in 78 * order to get an open file descriptor placed in FD. 79 * Otherwise, as for a DN-11, the open will have to 80 * be done in the "open" routine. 81 */ 82 if (!HW) 83 break; 84 if (setjmp(deadline) == 0) { 85 alarm(10); 86 FD = open(cp, (O_RDWR | 87 (boolean(value(DC)) ? O_NONBLOCK : 0))); 88 } 89 alarm(0); 90 if (FD < 0) { 91 perror(cp); 92 deadfl = 1; 93 } 94 if (!deadfl) { 95 struct termios cntrl; 96 97 tcgetattr(FD, &cntrl); 98 if (!boolean(value(DC))) 99 cntrl.c_cflag |= HUPCL; 100 tcsetattr(FD, TCSAFLUSH, &cntrl); 101 ioctl(FD, TIOCEXCL, 0); 102 signal(SIGALRM, SIG_DFL); 103 return ((long)cp); 104 } 105 (void)uu_unlock(uucplock); 106 } 107 signal(SIGALRM, f); 108 return (deadfl ? -1 : (long)cp); 109 } 110