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Annotation of 43BSD/ucb/whois.c, revision 1.1.1.1

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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