1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)dn11.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 /* 13 * Routines for dialing up on DN-11 14 */ 15 #include "tip.h" 16 17 int dn_abort(); 18 void alarmtr(); 19 static jmp_buf jmpbuf; 20 static int child = -1, dn; 21 22 dn_dialer(num, acu) 23 char *num, *acu; 24 { 25 extern errno; 26 char *p, *q, phone[40]; 27 int lt, nw, connected = 1; 28 register int timelim; 29 30 if (boolean(value(VERBOSE))) 31 printf("\nstarting call..."); 32 if ((dn = open(acu, 1)) < 0) { 33 if (errno == EBUSY) 34 printf("line busy..."); 35 else 36 printf("acu open error..."); 37 return (0); 38 } 39 if (setjmp(jmpbuf)) { 40 kill(child, SIGKILL); 41 close(dn); 42 return (0); 43 } 44 signal(SIGALRM, alarmtr); 45 timelim = 5 * strlen(num); 46 alarm(timelim < 30 ? 30 : timelim); 47 if ((child = fork()) == 0) { 48 /* 49 * ignore this stuff for aborts 50 */ 51 signal(SIGALRM, SIG_IGN); 52 signal(SIGINT, SIG_IGN); 53 signal(SIGQUIT, SIG_IGN); 54 sleep(2); 55 nw = write(dn, num, lt = strlen(num)); 56 exit(nw != lt); 57 } 58 /* 59 * open line - will return on carrier 60 */ 61 if ((FD = open(DV, 2)) < 0) { 62 if (errno == EIO) 63 printf("lost carrier..."); 64 else 65 printf("dialup line open failed..."); 66 alarm(0); 67 kill(child, SIGKILL); 68 close(dn); 69 return (0); 70 } 71 alarm(0); 72 ioctl(dn, TIOCHPCL, 0); 73 signal(SIGALRM, SIG_DFL); 74 while ((nw = wait(<)) != child && nw != -1) 75 ; 76 fflush(stdout); 77 close(dn); 78 if (lt != 0) { 79 close(FD); 80 return (0); 81 } 82 return (1); 83 } 84 85 void 86 alarmtr() 87 { 88 alarm(0); 89 longjmp(jmpbuf, 1); 90 } 91 92 /* 93 * Insurance, for some reason we don't seem to be 94 * hanging up... 95 */ 96 dn_disconnect() 97 { 98 99 sleep(2); 100 if (FD > 0) 101 ioctl(FD, TIOCCDTR, 0); 102 close(FD); 103 } 104 105 dn_abort() 106 { 107 108 sleep(2); 109 if (child > 0) 110 kill(child, SIGKILL); 111 if (dn > 0) 112 close(dn); 113 if (FD > 0) 114 ioctl(FD, TIOCCDTR, 0); 115 close(FD); 116 } 117