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