1 /* $NetBSD: hunt.c,v 1.8 1997/11/22 07:28:43 lukem 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 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)hunt.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 __RCSID("$NetBSD: hunt.c,v 1.8 1997/11/22 07:28:43 lukem Exp $"); 42 #endif /* not lint */ 43 44 #include "tip.h" 45 46 static jmp_buf deadline; 47 static int deadfl; 48 49 void dead __P((int)); 50 51 void 52 dead(dummy) 53 int dummy; 54 { 55 deadfl = 1; 56 longjmp(deadline, 1); 57 } 58 59 int 60 hunt(name) 61 char *name; 62 { 63 char *cp; 64 sig_t f; 65 66 f = signal(SIGALRM, dead); 67 while ((cp = getremote(name)) != NULL) { 68 deadfl = 0; 69 uucplock = strrchr(cp, '/')+1; 70 if (uu_lock(uucplock) < 0) 71 continue; 72 /* 73 * Straight through call units, such as the BIZCOMP, 74 * VADIC and the DF, must indicate they're hardwired in 75 * order to get an open file descriptor placed in FD. 76 * Otherwise, as for a DN-11, the open will have to 77 * be done in the "open" routine. 78 */ 79 if (!HW) 80 break; 81 if (setjmp(deadline) == 0) { 82 alarm(10); 83 FD = open(cp, (O_RDWR | (DC ? O_NONBLOCK : 0))); 84 } 85 alarm(0); 86 if (FD < 0) { 87 perror(cp); 88 deadfl = 1; 89 } 90 if (!deadfl) { 91 struct termios cntrl; 92 93 tcgetattr(FD, &cntrl); 94 if (!DC) 95 cntrl.c_cflag |= HUPCL; 96 tcsetattr(FD, TCSAFLUSH, &cntrl); 97 ioctl(FD, TIOCEXCL, 0); 98 signal(SIGALRM, SIG_DFL); 99 return (cp != NULL); 100 } 101 (void)uu_unlock(uucplock); 102 } 103 signal(SIGALRM, f); 104 return (deadfl ? -1 : cp != NULL); 105 } 106