projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 4b3ef9ea WJ |
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 | } |