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Annotation of 43BSD/ucb/whois.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[] = "@(#)whois.c    5.2 (Berkeley) 11/1/85";
        !            15: #endif not lint
        !            16: 
        !            17: #include <sys/types.h>
        !            18: #include <sys/socket.h>
        !            19: 
        !            20: #include <netinet/in.h>
        !            21: 
        !            22: #include <stdio.h>
        !            23: #include <netdb.h>
        !            24: 
        !            25: #define        NICHOST "sri-nic.arpa"
        !            26: 
        !            27: main(argc, argv)
        !            28:        int argc;
        !            29:        char *argv[];
        !            30: {
        !            31:        int s;
        !            32:        register FILE *sfi, *sfo;
        !            33:        register char c;
        !            34:        char *host = NICHOST;
        !            35:        struct sockaddr_in sin;
        !            36:        struct hostent *hp;
        !            37:        struct servent *sp;
        !            38: 
        !            39:        argc--, argv++;
        !            40:        if (argc > 2 && strcmp(*argv, "-h") == 0) {
        !            41:                argv++, argc--;
        !            42:                host = *argv++;
        !            43:                argc--;
        !            44:        }
        !            45:        if (argc != 1) {
        !            46:                fprintf(stderr, "usage: whois [ -h host ] name\n");
        !            47:                exit(1);
        !            48:        }
        !            49:        hp = gethostbyname(host);
        !            50:        if (hp == NULL) {
        !            51:                fprintf(stderr, "whois: %s: host unknown\n", host);
        !            52:                exit(1);
        !            53:        }
        !            54:        host = hp->h_name;
        !            55:        s = socket(hp->h_addrtype, SOCK_STREAM, 0, 0);
        !            56:        if (s < 0) {
        !            57:                perror("whois: socket");
        !            58:                exit(2);
        !            59:        }
        !            60:        sin.sin_family = hp->h_addrtype;
        !            61:        if (bind(s, &sin, sizeof (sin), 0) < 0) {
        !            62:                perror("whois: bind");
        !            63:                exit(3);
        !            64:        }
        !            65:        bcopy(hp->h_addr, &sin.sin_addr, hp->h_length);
        !            66:        sp = getservbyname("whois", "tcp");
        !            67:        if (sp == NULL) {
        !            68:                fprintf(stderr, "whois: whois/tcp: unknown service\n");
        !            69:                exit(4);
        !            70:        }
        !            71:        sin.sin_port = sp->s_port;
        !            72:        if (connect(s, &sin, sizeof (sin), 0) < 0) {
        !            73:                perror("whois: connect");
        !            74:                exit(5);
        !            75:        }
        !            76:        sfi = fdopen(s, "r");
        !            77:        sfo = fdopen(s, "w");
        !            78:        if (sfi == NULL || sfo == NULL) {
        !            79:                perror("fdopen");
        !            80:                close(s);
        !            81:                exit(1);
        !            82:        }
        !            83:        fprintf(sfo, "%s\r\n", *argv);
        !            84:        fflush(sfo);
        !            85:        while ((c = getc(sfi)) != EOF)
        !            86:                putchar(c);
        !            87: }

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