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Annotation of 40BSD/cmd/leave.c, revision 1.1

1.1     ! root        1: static char *sccsid = "@(#)leave.c     4.1 (Berkeley) 10/1/80";
        !             2: #include <stdio.h>
        !             3: /*
        !             4:  * leave [hhmm]
        !             5:  *
        !             6:  * Reminds you when you have to leave.
        !             7:  * Leave prompts for input and goes away if you hit return.
        !             8:  * It nags you like a mother hen.
        !             9:  */
        !            10: char origlogin[20], thislogin[20];
        !            11: char *getlogin();
        !            12: char *whenleave;
        !            13: char *ctime();
        !            14: char buff[100];
        !            15: 
        !            16: main(argc,argv)
        !            17: char **argv;
        !            18: {
        !            19:        long when, tod, now, diff, hours, minutes;
        !            20:        int *nv;
        !            21:        int atoi();
        !            22:        int *localtime();
        !            23: 
        !            24:        if (argc < 2) {
        !            25:                printf("When do you have to leave? ");
        !            26:                fflush(stdout);
        !            27:                buff[read(0,buff,sizeof buff)] = 0;
        !            28:        } else {
        !            29:                strcpy(buff,argv[1]);
        !            30:        }
        !            31: 
        !            32:        if (buff[0] == '\n')
        !            33:                exit(0);
        !            34:        if (buff[0] == '+') {
        !            35:                diff = atoi(buff+1);
        !            36:                doalarm(diff);
        !            37:        }
        !            38:        if (buff[0] < '0' || buff[0] > '9') {
        !            39:                printf("usage: %s [hhmm]\n",argv[0]);
        !            40:                exit(1);
        !            41:        }
        !            42:        strcpy(origlogin,getlogin());
        !            43: 
        !            44:        tod = atoi(buff);
        !            45:        hours = tod / 100;
        !            46:        if (hours > 12)
        !            47:                hours -= 12;
        !            48:        if (hours == 12)
        !            49:                hours = 0;
        !            50:        minutes = tod % 100;
        !            51: 
        !            52:        if (hours < 0 || hours > 12 || minutes < 0 || minutes > 59) {
        !            53:                printf("usage: %s [hhmm]\n",argv[0]);
        !            54:                exit(1);
        !            55:        }
        !            56: 
        !            57:        setexit();      /* refigure time if killed */
        !            58:        time(&now);
        !            59:        nv = localtime(&now);
        !            60:        when = 60*hours+minutes;
        !            61:        if (nv[2] > 12) nv[2] -= 12;    /* do am/pm bit */
        !            62:        now = 60*nv[2] + nv[1];
        !            63:        diff = when - now;
        !            64:        while (diff < 0)
        !            65:                diff += 12*60;
        !            66:        if (diff > 11*60) printf("That time has already passed!\n");
        !            67:        doalarm(diff);
        !            68:        exit(0);
        !            69: }
        !            70: 
        !            71: 
        !            72: doalarm(nmins)
        !            73: long nmins;
        !            74: {
        !            75:        char *msg1, *msg2, *msg3, *msg4;
        !            76:        register int i;
        !            77:        int slp1, slp2, slp3, slp4;
        !            78:        int seconds, gseconds;
        !            79:        long daytime;
        !            80: 
        !            81:        seconds = 60 * nmins;
        !            82:        if (seconds <= 0)
        !            83:                seconds = 1;
        !            84:        gseconds = seconds;
        !            85: 
        !            86:        msg1 = "You have to leave in 5 minutes";
        !            87:        if (seconds <= 60*5) {
        !            88:                slp1 = 0;
        !            89:        } else {
        !            90:                slp1 = seconds - 60*5;
        !            91:                seconds = 60*5;
        !            92:        }
        !            93: 
        !            94:        msg2 = "Just one more minute!";
        !            95:        if (seconds <= 60) {
        !            96:                slp2 = 0;
        !            97:        } else {
        !            98:                slp2 = seconds - 60;
        !            99:                seconds = 60;
        !           100:        }
        !           101: 
        !           102:        msg3 = "Time to leave!";
        !           103:        slp3 = seconds;
        !           104: 
        !           105:        msg4 = "You're going to be late!";
        !           106:        slp4 = 60;
        !           107: 
        !           108:        time(&daytime);
        !           109:        daytime += gseconds;
        !           110:        whenleave = ctime(&daytime);
        !           111:        printf("Alarm set for %s\n",whenleave);
        !           112:        if (fork())
        !           113:                exit(0);
        !           114:        signal(2,1);
        !           115:        signal(3,1);
        !           116:        signal(15,1);
        !           117: 
        !           118:        if (slp1)
        !           119:                bother(slp1,msg1);
        !           120:        if (slp2)
        !           121:                bother(slp2,msg2);
        !           122:        bother(slp3,msg3);
        !           123:        for (;;) {
        !           124:                bother(slp4,msg4);
        !           125:        }
        !           126: }
        !           127: 
        !           128: bother(slp,msg)
        !           129: int slp;
        !           130: char *msg;
        !           131: {
        !           132: 
        !           133:        delay(slp);
        !           134:        printf("\7\7\7");
        !           135:        printf("%s\n",msg);
        !           136: }
        !           137: 
        !           138: /*
        !           139:  * delay is like sleep but does it in 100 sec pieces and
        !           140:  * knows what zero means.
        !           141:  */
        !           142: delay(secs) int secs; {
        !           143:        int n;
        !           144: 
        !           145:        while(secs>0) {
        !           146:                n = 100;
        !           147:                secs = secs - 100;
        !           148:                if (secs < 0) {
        !           149:                        n = n + secs;
        !           150:                }
        !           151:                if (n > 0)
        !           152:                        sleep(n);
        !           153:                strcpy(thislogin,getlogin());
        !           154:                if (strcmp(origlogin, thislogin))
        !           155:                        exit(0);
        !           156:        }
        !           157: }
        !           158: 
        !           159: #ifdef V6
        !           160: char *getlogin() {
        !           161: #include <utmp.h>
        !           162: 
        !           163:        static struct utmp ubuf;
        !           164:        int ufd;
        !           165: 
        !           166:        ufd = open("/etc/utmp",0);
        !           167:        seek(ufd, ttyn(0)*sizeof(ubuf), 0);
        !           168:        read(ufd, &ubuf, sizeof(ubuf));
        !           169:        ubuf.ut_name[sizeof(ubuf.ut_name)] = 0;
        !           170:        return(&ubuf.ut_name);
        !           171: }
        !           172: #endif

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