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Annotation of 3BSD/cmd/leave.c, revision 1.1

1.1     ! root        1: #include <whoami.h>
        !             2: /*
        !             3:  * leave - reminds you when you have to leave.
        !             4:  * leave prompts for input and goes away if you hit return.
        !             5:  * it nags you like a mother hen.
        !             6:  */
        !             7: char origlogin[20], thislogin[20];
        !             8: char *getlogin();
        !             9: char *whenleave;
        !            10: char *ctime();
        !            11: char buff[100];
        !            12: 
        !            13: main(argc,argv) char **argv; {
        !            14:        long when, tod, now, diff, hours, minutes;
        !            15:        int *nv;
        !            16:        int atoi();
        !            17:        int *localtime();
        !            18: 
        !            19:        if (argc < 2) {
        !            20:                printf("When do you have to leave? ");
        !            21:                buff[read(0,buff,sizeof buff)] = 0;
        !            22:        } else {
        !            23:                strcpy(buff,argv[1]);
        !            24:        }
        !            25:        if (buff[0] == '\n') exit(0);
        !            26:        if (buff[0] == '+') {
        !            27:                diff = atoi(buff+1);
        !            28:                doalarm(diff);
        !            29:        }
        !            30:        if (buff[0] < '0' || buff[0] > '9') {
        !            31:                printf("usage: %s [hhmm]\n",argv[0]);
        !            32:                exit(1);
        !            33:        }
        !            34:        strcpy(origlogin,getlogin());
        !            35: 
        !            36:        tod = atoi(buff);
        !            37:        hours = tod / 100;
        !            38:        if (hours > 12) hours -= 12;
        !            39:        if (hours == 12) hours = 0;
        !            40:        minutes = tod % 100;
        !            41: 
        !            42:        if (hours < 0 || hours > 12 || minutes < 0 || minutes > 59) {
        !            43:                printf("usage: %s [hhmm]\n",argv[0]);
        !            44:                exit(1);
        !            45:        }
        !            46: 
        !            47:        setexit();      /* refigure time if killed */
        !            48:        time(&now);
        !            49:        nv = localtime(&now);
        !            50:        when = 60*hours+minutes;
        !            51:        if (nv[2] > 12) nv[2] -= 12;    /* do am/pm bit */
        !            52:        now = 60*nv[2] + nv[1];
        !            53:        diff = when - now;
        !            54:        while (diff < 0)
        !            55:                diff += 12*60;
        !            56:        if (diff > 11*60) printf("That time has already passed!\n");
        !            57:        doalarm(diff);
        !            58:        exit(0);
        !            59: }
        !            60: 
        !            61: 
        !            62: doalarm(nmins) long nmins; {
        !            63:        char *msg1, *msg2, *msg3, *msg4;
        !            64:        register int i;
        !            65:        int slp1, slp2, slp3, slp4;
        !            66:        int seconds, gseconds;
        !            67:        long daytime;
        !            68: 
        !            69:        seconds = 60 * nmins;
        !            70:        if (seconds <= 0) seconds = 1;
        !            71:        gseconds = seconds;
        !            72: 
        !            73:        msg1 = "You have to leave in 5 minutes";
        !            74:        if (seconds <= 60*5) {
        !            75:                slp1 = 0;
        !            76:        } else {
        !            77:                slp1 = seconds - 60*5;
        !            78:                seconds = 60*5;
        !            79:        }
        !            80: 
        !            81:        msg2 = "Just one more minute!";
        !            82:        if (seconds <= 60) {
        !            83:                slp2 = 0;
        !            84:        } else {
        !            85:                slp2 = seconds - 60;
        !            86:                seconds = 60;
        !            87:        }
        !            88: 
        !            89:        msg3 = "Time to leave!";
        !            90:        slp3 = seconds;
        !            91: 
        !            92:        msg4 = "You're going to be late!";
        !            93:        slp4 = 60;
        !            94: 
        !            95:        time(&daytime);
        !            96:        daytime += gseconds;
        !            97:        whenleave = ctime(&daytime);
        !            98:        printf("Alarm set for %s\n",whenleave);
        !            99:        if (fork()) exit(0);
        !           100:        signal(2,1);
        !           101:        signal(3,1);
        !           102:        signal(15,1/*nag*/);
        !           103: 
        !           104:        if (slp1)
        !           105:                bother(slp1,msg1);
        !           106:        if (slp2)
        !           107:                bother(slp2,msg2);
        !           108:        bother(slp3,msg3);
        !           109:        for (;;) {
        !           110:                bother(slp4,msg4);
        !           111:        }
        !           112: }
        !           113: 
        !           114: bother(slp,msg) int slp; char *msg; {
        !           115: 
        !           116:        delay(slp);
        !           117:        printf("\7\7\7");
        !           118:        printf("%s\n",msg);
        !           119: }
        !           120: 
        !           121: /*
        !           122:  * delay is like sleep but does it in 100 sec pieces and
        !           123:  * knows what zero means.
        !           124:  */
        !           125: delay(secs) int secs; {
        !           126:        int n;
        !           127: 
        !           128:        while(secs>0) {
        !           129:                n = 100;
        !           130:                secs = secs - 100;
        !           131:                if (secs < 0) {
        !           132:                        n = n + secs;
        !           133:                }
        !           134:                if (n > 0) sleep(n);
        !           135:                strcpy(thislogin,getlogin());
        !           136:                if (strcmp(origlogin, thislogin)) exit(0);
        !           137:        }
        !           138: }
        !           139: 
        !           140: #ifndef VAX
        !           141: char *getlogin() {
        !           142: #include <utmp.h>
        !           143:        static struct utmp ubuf;
        !           144:        int ufd;
        !           145: 
        !           146:        ufd = open("/etc/utmp",0);
        !           147:        seek(ufd, ttyn(0)*sizeof(ubuf), 0);
        !           148:        read(ufd, &ubuf, sizeof(ubuf));
        !           149:        ubuf.ut_name[8] = 0;
        !           150:        return(&ubuf.ut_name);
        !           151: }
        !           152: #endif

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