| 1 | /* |
| 2 | * Copyright (c) 1983 The Regents of the University of California. |
| 3 | * 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. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | static char sccsid[] = "@(#)hunt.c 5.6 (Berkeley) 6/1/90"; |
| 36 | #endif /* not lint */ |
| 37 | |
| 38 | #include "tip.h" |
| 39 | |
| 40 | extern char *getremote(); |
| 41 | extern char *rindex(); |
| 42 | |
| 43 | static jmp_buf deadline; |
| 44 | static int deadfl; |
| 45 | |
| 46 | void |
| 47 | dead() |
| 48 | { |
| 49 | deadfl = 1; |
| 50 | longjmp(deadline, 1); |
| 51 | } |
| 52 | |
| 53 | hunt(name) |
| 54 | char *name; |
| 55 | { |
| 56 | register char *cp; |
| 57 | sig_t f; |
| 58 | |
| 59 | f = signal(SIGALRM, dead); |
| 60 | while (cp = getremote(name)) { |
| 61 | deadfl = 0; |
| 62 | uucplock = rindex(cp, '/')+1; |
| 63 | if (uu_lock(uucplock) < 0) |
| 64 | continue; |
| 65 | /* |
| 66 | * Straight through call units, such as the BIZCOMP, |
| 67 | * VADIC and the DF, must indicate they're hardwired in |
| 68 | * order to get an open file descriptor placed in FD. |
| 69 | * Otherwise, as for a DN-11, the open will have to |
| 70 | * be done in the "open" routine. |
| 71 | */ |
| 72 | if (!HW) |
| 73 | break; |
| 74 | if (setjmp(deadline) == 0) { |
| 75 | alarm(10); |
| 76 | FD = open(cp, O_RDWR); |
| 77 | } |
| 78 | alarm(0); |
| 79 | if (FD < 0) { |
| 80 | perror(cp); |
| 81 | deadfl = 1; |
| 82 | } |
| 83 | if (!deadfl) { |
| 84 | ioctl(FD, TIOCEXCL, 0); |
| 85 | ioctl(FD, TIOCHPCL, 0); |
| 86 | signal(SIGALRM, SIG_DFL); |
| 87 | return ((int)cp); |
| 88 | } |
| 89 | (void)uu_unlock(uucplock); |
| 90 | } |
| 91 | signal(SIGALRM, f); |
| 92 | return (deadfl ? -1 : (int)cp); |
| 93 | } |