projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 05862919 | 1 | #ifndef lint |
| 0f4556f1 | 2 | static char sccsid[] = "@(#)hunt.c 4.8 (Berkeley) 10/20/83"; |
| 05862919 | 3 | #endif |
| 60d5f7dd | 4 | |
| 05862919 | 5 | #include "tip.h" |
| 60d5f7dd BJ |
6 | |
| 7 | extern char *getremote(); | |
| 8 | extern char *rindex(); | |
| 9 | ||
| 05862919 SL |
10 | static jmp_buf deadline; |
| 11 | static int deadfl; | |
| 60d5f7dd BJ |
12 | |
| 13 | dead() | |
| 14 | { | |
| 05862919 | 15 | |
| 60d5f7dd | 16 | deadfl = 1; |
| 05862919 | 17 | longjmp(deadline, 1); |
| 60d5f7dd BJ |
18 | } |
| 19 | ||
| 20 | hunt(name) | |
| d8feebc2 | 21 | char *name; |
| 60d5f7dd BJ |
22 | { |
| 23 | register char *cp; | |
| 05862919 | 24 | int (*f)(); |
| 60d5f7dd | 25 | |
| 05862919 | 26 | f = signal(SIGALRM, dead); |
| 60d5f7dd | 27 | deadfl = 0; |
| 3f48242d | 28 | while (cp = getremote(name)) { |
| 60d5f7dd BJ |
29 | uucplock = rindex(cp, '/')+1; |
| 30 | if (mlock(uucplock) < 0) { | |
| 31 | delock(uucplock); | |
| 32 | continue; | |
| 33 | } | |
| f0211bf2 | 34 | /* |
| 6b46907f RC |
35 | * Straight through call units, such as the BIZCOMP, |
| 36 | * VADIC and the DF, must indicate they're hardwired in | |
| f0211bf2 SL |
37 | * order to get an open file descriptor placed in FD. |
| 38 | * Otherwise, as for a DN-11, the open will have to | |
| 39 | * be done in the "open" routine. | |
| 40 | */ | |
| 41 | if (!HW) | |
| 42 | break; | |
| 05862919 SL |
43 | if (setjmp(deadline) == 0) { |
| 44 | alarm(10); | |
| 45 | FD = open(cp, O_RDWR); | |
| 60d5f7dd BJ |
46 | } |
| 47 | alarm(0); | |
| 0f4556f1 C |
48 | if (FD < 0) { |
| 49 | perror(cp); | |
| 50 | deadfl = 1; | |
| 51 | } | |
| 05862919 SL |
52 | if (!deadfl) { |
| 53 | ioctl(FD, TIOCEXCL, 0); | |
| 54 | ioctl(FD, TIOCHPCL, 0); | |
| 55 | signal(SIGALRM, SIG_DFL); | |
| 56 | return ((int)cp); | |
| 57 | } | |
| 673be859 | 58 | delock(uucplock); |
| 60d5f7dd | 59 | } |
| 05862919 | 60 | signal(SIGALRM, f); |
| 3f48242d | 61 | return (deadfl ? -1 : (int)cp); |
| 60d5f7dd | 62 | } |