projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 051b1e55 | 1 | /* |
| c9686c12 KB |
2 | * Copyright (c) 1983 The Regents of the University of California. |
| 3 | * All rights reserved. | |
| 4 | * | |
| cb956e54 | 5 | * %sccs.include.redist.c% |
| 051b1e55 DF |
6 | */ |
| 7 | ||
| 05862919 | 8 | #ifndef lint |
| cb956e54 | 9 | static char sccsid[] = "@(#)hunt.c 5.6 (Berkeley) %G%"; |
| c9686c12 | 10 | #endif /* not lint */ |
| 60d5f7dd | 11 | |
| 05862919 | 12 | #include "tip.h" |
| 60d5f7dd BJ |
13 | |
| 14 | extern char *getremote(); | |
| 15 | extern char *rindex(); | |
| 16 | ||
| 05862919 SL |
17 | static jmp_buf deadline; |
| 18 | static int deadfl; | |
| 60d5f7dd | 19 | |
| 981fd33c | 20 | void |
| 60d5f7dd BJ |
21 | dead() |
| 22 | { | |
| 23 | deadfl = 1; | |
| 05862919 | 24 | longjmp(deadline, 1); |
| 60d5f7dd BJ |
25 | } |
| 26 | ||
| 27 | hunt(name) | |
| d8feebc2 | 28 | char *name; |
| 60d5f7dd BJ |
29 | { |
| 30 | register char *cp; | |
| 981fd33c | 31 | sig_t f; |
| 60d5f7dd | 32 | |
| 05862919 | 33 | f = signal(SIGALRM, dead); |
| 3f48242d | 34 | while (cp = getremote(name)) { |
| 8f1963b9 | 35 | deadfl = 0; |
| 60d5f7dd | 36 | uucplock = rindex(cp, '/')+1; |
| 5d369851 | 37 | if (uu_lock(uucplock) < 0) |
| 60d5f7dd | 38 | continue; |
| f0211bf2 | 39 | /* |
| 6b46907f RC |
40 | * Straight through call units, such as the BIZCOMP, |
| 41 | * VADIC and the DF, must indicate they're hardwired in | |
| f0211bf2 SL |
42 | * order to get an open file descriptor placed in FD. |
| 43 | * Otherwise, as for a DN-11, the open will have to | |
| 44 | * be done in the "open" routine. | |
| 45 | */ | |
| 46 | if (!HW) | |
| 47 | break; | |
| 05862919 SL |
48 | if (setjmp(deadline) == 0) { |
| 49 | alarm(10); | |
| 50 | FD = open(cp, O_RDWR); | |
| 60d5f7dd BJ |
51 | } |
| 52 | alarm(0); | |
| 274c3d56 MK |
53 | if (FD < 0) { |
| 54 | perror(cp); | |
| 55 | deadfl = 1; | |
| 56 | } | |
| 05862919 SL |
57 | if (!deadfl) { |
| 58 | ioctl(FD, TIOCEXCL, 0); | |
| 59 | ioctl(FD, TIOCHPCL, 0); | |
| 60 | signal(SIGALRM, SIG_DFL); | |
| 61 | return ((int)cp); | |
| 62 | } | |
| 5d369851 | 63 | (void)uu_unlock(uucplock); |
| 60d5f7dd | 64 | } |
| 05862919 | 65 | signal(SIGALRM, f); |
| 3f48242d | 66 | return (deadfl ? -1 : (int)cp); |
| 60d5f7dd | 67 | } |