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Annotation of 43BSD/ucb/leave.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: char copyright[] =
        !             9: "@(#) Copyright (c) 1980 Regents of the University of California.\n\
        !            10:  All rights reserved.\n";
        !            11: #endif not lint
        !            12: 
        !            13: #ifndef lint
        !            14: static char sccsid[] = "@(#)leave.c    5.1 (Berkeley) 5/31/85";
        !            15: #endif not lint
        !            16: 
        !            17: #include <stdio.h>
        !            18: #include <signal.h>
        !            19: /*
        !            20:  * leave [[+]hhmm]
        !            21:  *
        !            22:  * Reminds you when you have to leave.
        !            23:  * Leave prompts for input and goes away if you hit return.
        !            24:  * It nags you like a mother hen.
        !            25:  */
        !            26: char origlogin[20];
        !            27: char *getlogin();
        !            28: char *whenleave;
        !            29: char *ctime();
        !            30: char buff[100];
        !            31: 
        !            32: main(argc, argv)
        !            33: char **argv;
        !            34: {
        !            35:        long when, tod, now, diff, hours, minutes;
        !            36:        char *cp;
        !            37:        int *nv;
        !            38:        int atoi();
        !            39:        int *localtime();
        !            40: 
        !            41:        strcpy(origlogin, getlogin());
        !            42:        if (argc < 2) {
        !            43:                printf("When do you have to leave? ");
        !            44:                fflush(stdout);
        !            45:                buff[read(0, buff, sizeof buff)] = 0;
        !            46:                cp = buff;
        !            47:        } else
        !            48:                cp = argv[1];
        !            49:        if (*cp == '\n')
        !            50:                exit(0);
        !            51:        if (*cp == '+') {
        !            52:                cp++;
        !            53:                if (*cp < '0' || *cp > '9')
        !            54:                        usage();
        !            55:                tod = atoi(cp);
        !            56:                hours = tod / 100;
        !            57:                minutes = tod % 100;
        !            58:                if (minutes < 0 || minutes > 59)
        !            59:                        usage();
        !            60:                diff = 60*hours+minutes;
        !            61:                doalarm(diff);
        !            62:                exit(0);
        !            63:        }
        !            64:        if (*cp < '0' || *cp > '9')
        !            65:                usage();
        !            66:        tod = atoi(cp);
        !            67:        hours = tod / 100;
        !            68:        if (hours > 12)
        !            69:                hours -= 12;
        !            70:        if (hours == 12)
        !            71:                hours = 0;
        !            72:        minutes = tod % 100;
        !            73: 
        !            74:        if (hours < 0 || hours > 12 || minutes < 0 || minutes > 59)
        !            75:                usage();
        !            76: 
        !            77:        time(&now);
        !            78:        nv = localtime(&now);
        !            79:        when = 60*hours+minutes;
        !            80:        if (nv[2] > 12)
        !            81:                nv[2] -= 12;    /* do am/pm bit */
        !            82:        now = 60*nv[2] + nv[1];
        !            83:        diff = when - now;
        !            84:        while (diff < 0)
        !            85:                diff += 12*60;
        !            86:        if (diff > 11*60) {
        !            87:                printf("That time has already passed!\n");
        !            88:                exit(1);
        !            89:        }
        !            90:        doalarm(diff);
        !            91:        exit(0);
        !            92: }
        !            93: 
        !            94: usage()
        !            95: {
        !            96:        printf("usage: leave [[+]hhmm]\n");
        !            97:        exit(1);
        !            98: }
        !            99: 
        !           100: doalarm(nmins)
        !           101: long nmins;
        !           102: {
        !           103:        char *msg1, *msg2, *msg3, *msg4;
        !           104:        register int i;
        !           105:        int slp1, slp2, slp3, slp4;
        !           106:        int seconds, gseconds;
        !           107:        long daytime;
        !           108: 
        !           109:        seconds = 60 * nmins;
        !           110:        if (seconds <= 0)
        !           111:                seconds = 1;
        !           112:        gseconds = seconds;
        !           113: 
        !           114:        msg1 = "You have to leave in 5 minutes";
        !           115:        if (seconds <= 60*5) {
        !           116:                slp1 = 0;
        !           117:        } else {
        !           118:                slp1 = seconds - 60*5;
        !           119:                seconds = 60*5;
        !           120:        }
        !           121: 
        !           122:        msg2 = "Just one more minute!";
        !           123:        if (seconds <= 60) {
        !           124:                slp2 = 0;
        !           125:        } else {
        !           126:                slp2 = seconds - 60;
        !           127:                seconds = 60;
        !           128:        }
        !           129: 
        !           130:        msg3 = "Time to leave!";
        !           131:        slp3 = seconds;
        !           132: 
        !           133:        msg4 = "You're going to be late!";
        !           134:        slp4 = 60;
        !           135: 
        !           136:        time(&daytime);
        !           137:        daytime += gseconds;
        !           138:        whenleave = ctime(&daytime);
        !           139:        printf("Alarm set for %s", whenleave);
        !           140:        if (fork())
        !           141:                exit(0);
        !           142:        signal(SIGINT, SIG_IGN);
        !           143:        signal(SIGQUIT, SIG_IGN);
        !           144:        signal(SIGTERM, SIG_IGN);
        !           145:        signal(SIGTTOU, SIG_IGN);
        !           146: 
        !           147:        if (slp1)
        !           148:                bother(slp1, msg1);
        !           149:        if (slp2)
        !           150:                bother(slp2, msg2);
        !           151:        bother(slp3, msg3);
        !           152:        for (i = 0; i < 10; i++)
        !           153:                bother(slp4, msg4);
        !           154:        printf("That was the last time I'll tell you. Bye.\n");
        !           155:        exit(0);
        !           156: }
        !           157: 
        !           158: bother(slp, msg)
        !           159: int slp;
        !           160: char *msg;
        !           161: {
        !           162: 
        !           163:        delay(slp);
        !           164:        printf("\7\7\7%s\n", msg);
        !           165: }
        !           166: 
        !           167: /*
        !           168:  * delay is like sleep but does it in 100 sec pieces and
        !           169:  * knows what zero means.
        !           170:  */
        !           171: delay(secs)
        !           172: int secs;
        !           173: {
        !           174:        int n;
        !           175: 
        !           176:        while (secs > 0) {
        !           177:                n = 100;
        !           178:                if (secs < n)
        !           179:                        n = secs;
        !           180:                secs -= n;
        !           181:                if (n > 0)
        !           182:                        sleep(n);
        !           183:                if (strcmp(origlogin, getlogin()))
        !           184:                        exit(0);
        !           185:        }
        !           186: }
        !           187: 
        !           188: #ifdef V6
        !           189: char *getlogin() {
        !           190: #include <utmp.h>
        !           191: 
        !           192:        static struct utmp ubuf;
        !           193:        int ufd;
        !           194: 
        !           195:        ufd = open("/etc/utmp",0);
        !           196:        seek(ufd, ttyn(0)*sizeof(ubuf), 0);
        !           197:        read(ufd, &ubuf, sizeof(ubuf));
        !           198:        ubuf.ut_name[sizeof(ubuf.ut_name)] = 0;
        !           199:        return(&ubuf.ut_name);
        !           200: }
        !           201: #endif

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