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Annotation of 43BSDReno/usr.bin/tip/aculib/dn11.c, revision 1.1.1.1

1.1       root        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 are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: static char sccsid[] = "@(#)dn11.c     5.3 (Berkeley) 6/1/90";
                     22: #endif /* not lint */
                     23: 
                     24: /*
                     25:  * Routines for dialing up on DN-11
                     26:  */
                     27: #include "tip.h"
                     28: 
                     29: int dn_abort(), alarmtr();
                     30: static jmp_buf jmpbuf;
                     31: static int child = -1, dn;
                     32: 
                     33: dn_dialer(num, acu)
                     34:        char *num, *acu;
                     35: {
                     36:        extern errno;
                     37:        char *p, *q, phone[40];
                     38:        int lt, nw, connected = 1;
                     39:        register int timelim;
                     40: 
                     41:        if (boolean(value(VERBOSE)))
                     42:                printf("\nstarting call...");
                     43:        if ((dn = open(acu, 1)) < 0) {
                     44:                if (errno == EBUSY)
                     45:                        printf("line busy...");
                     46:                else
                     47:                        printf("acu open error...");
                     48:                return (0);
                     49:        }
                     50:        if (setjmp(jmpbuf)) {
                     51:                kill(child, SIGKILL);
                     52:                close(dn);
                     53:                return (0);
                     54:        }
                     55:        signal(SIGALRM, alarmtr);
                     56:        timelim = 5 * strlen(num);
                     57:        alarm(timelim < 30 ? 30 : timelim);
                     58:        if ((child = fork()) == 0) {
                     59:                /*
                     60:                 * ignore this stuff for aborts
                     61:                 */
                     62:                signal(SIGALRM, SIG_IGN);
                     63:                signal(SIGINT, SIG_IGN);
                     64:                signal(SIGQUIT, SIG_IGN);
                     65:                sleep(2);
                     66:                nw = write(dn, num, lt = strlen(num));
                     67:                exit(nw != lt);
                     68:        }
                     69:        /*
                     70:         * open line - will return on carrier
                     71:         */
                     72:        if ((FD = open(DV, 2)) < 0) {
                     73:                if (errno == EIO)
                     74:                        printf("lost carrier...");
                     75:                else
                     76:                        printf("dialup line open failed...");
                     77:                alarm(0);
                     78:                kill(child, SIGKILL);
                     79:                close(dn);
                     80:                return (0);
                     81:        }
                     82:        alarm(0);
                     83:        ioctl(dn, TIOCHPCL, 0);
                     84:        signal(SIGALRM, SIG_DFL);
                     85:        while ((nw = wait(&lt)) != child && nw != -1)
                     86:                ;
                     87:        fflush(stdout);
                     88:        close(dn);
                     89:        if (lt != 0) {
                     90:                close(FD);
                     91:                return (0);
                     92:        }
                     93:        return (1);
                     94: }
                     95: 
                     96: alarmtr()
                     97: {
                     98: 
                     99:        alarm(0);
                    100:        longjmp(jmpbuf, 1);
                    101: }
                    102: 
                    103: /*
                    104:  * Insurance, for some reason we don't seem to be
                    105:  *  hanging up...
                    106:  */
                    107: dn_disconnect()
                    108: {
                    109: 
                    110:        sleep(2);
                    111:        if (FD > 0)
                    112:                ioctl(FD, TIOCCDTR, 0);
                    113:        close(FD);
                    114: }
                    115: 
                    116: dn_abort()
                    117: {
                    118: 
                    119:        sleep(2);
                    120:        if (child > 0)
                    121:                kill(child, SIGKILL);
                    122:        if (dn > 0)
                    123:                close(dn);
                    124:        if (FD > 0)
                    125:                ioctl(FD, TIOCCDTR, 0);
                    126:        close(FD);
                    127: }

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