1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)hunt.c 8.1 (Berkeley) 6/6/93 30 * $FreeBSD: src/usr.bin/tip/tip/hunt.c,v 1.5 1999/08/28 01:06:33 peter Exp $ 31 */ 32 33 #include <sys/types.h> 34 #include <err.h> 35 #include <libutil.h> 36 #include "tip.h" 37 38 static jmp_buf deadline; 39 static int deadfl; 40 41 static void 42 dead(int signo) 43 { 44 deadfl = 1; 45 longjmp(deadline, 1); 46 } 47 48 long 49 hunt(char *name) 50 { 51 char *cp; 52 sig_t f; 53 int res; 54 55 f = signal(SIGALRM, dead); 56 while ((cp = getremote(name))) { 57 deadfl = 0; 58 if ((uucplock = strrchr(cp, '/')) == NULL) 59 uucplock = cp; 60 else 61 ++uucplock; 62 if ((res = uu_lock(uucplock)) != UU_LOCK_OK) { 63 if (res != UU_LOCK_INUSE) 64 fprintf(stderr, "uu_lock: %s\n", uu_lockerr(res)); 65 continue; 66 } 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 } 80 alarm(0); 81 if (FD < 0) { 82 warn("%s", cp); 83 deadfl = 1; 84 } 85 if (!deadfl) { 86 ioctl(FD, TIOCEXCL, 0); 87 { 88 struct termios t; 89 if (tcgetattr(FD, &t) == 0) { 90 t.c_cflag |= HUPCL; 91 (void)tcsetattr(FD, TCSANOW, &t); 92 } 93 } 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