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Annotation of 43BSDReno/usr.bin/whois/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.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted provided
                      6:  * that: (1) source distributions retain this entire copyright notice and
                      7:  * comment, and (2) distributions including binaries display the following
                      8:  * acknowledgement:  ``This product includes software developed by the
                      9:  * University of California, Berkeley and its contributors'' in the
                     10:  * documentation or other materials provided with the distribution and in
                     11:  * all advertising materials mentioning features or use of this software.
                     12:  * Neither the name of the University nor the names of its contributors may
                     13:  * be used to endorse or promote products derived from this software without
                     14:  * specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     16:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     17:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: char copyright[] =
                     22: "@(#) Copyright (c) 1980 Regents of the University of California.\n\
                     23:  All rights reserved.\n";
                     24: #endif /* not lint */
                     25: 
                     26: #ifndef lint
                     27: static char sccsid[] = "@(#)whois.c    5.9 (Berkeley) 6/1/90";
                     28: #endif /* not lint */
                     29: 
                     30: #include <sys/types.h>
                     31: #include <sys/socket.h>
                     32: #include <netinet/in.h>
                     33: #include <netdb.h>
                     34: #include <stdio.h>
                     35: 
                     36: #define        NICHOST "nic.ddn.mil"
                     37: 
                     38: main(argc, argv)
                     39:        int argc;
                     40:        char **argv;
                     41: {
                     42:        extern char *optarg;
                     43:        extern int optind;
                     44:        register FILE *sfi, *sfo;
                     45:        register int ch;
                     46:        struct sockaddr_in sin;
                     47:        struct hostent *hp;
                     48:        struct servent *sp;
                     49:        int s;
                     50:        char *host;
                     51: 
                     52:        host = NICHOST;
                     53:        while ((ch = getopt(argc, argv, "h:")) != EOF)
                     54:                switch((char)ch) {
                     55:                case 'h':
                     56:                        host = optarg;
                     57:                        break;
                     58:                case '?':
                     59:                default:
                     60:                        usage();
                     61:                }
                     62:        argc -= optind;
                     63:        argv += optind;
                     64: 
                     65:        if (argc != 1)
                     66:                usage();
                     67: 
                     68:        hp = gethostbyname(host);
                     69:        if (hp == NULL) {
                     70:                (void)fprintf(stderr, "whois: %s: ", host);
                     71:                herror((char *)NULL);
                     72:                exit(1);
                     73:        }
                     74:        host = hp->h_name;
                     75:        s = socket(hp->h_addrtype, SOCK_STREAM, 0);
                     76:        if (s < 0) {
                     77:                perror("whois: socket");
                     78:                exit(2);
                     79:        }
                     80:        bzero((caddr_t)&sin, sizeof (sin));
                     81:        sin.sin_family = hp->h_addrtype;
                     82:        if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
                     83:                perror("whois: bind");
                     84:                exit(3);
                     85:        }
                     86:        bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
                     87:        sp = getservbyname("whois", "tcp");
                     88:        if (sp == NULL) {
                     89:                (void)fprintf(stderr, "whois: whois/tcp: unknown service\n");
                     90:                exit(4);
                     91:        }
                     92:        sin.sin_port = sp->s_port;
                     93:        if (connect(s, &sin, sizeof(sin)) < 0) {
                     94:                perror("whois: connect");
                     95:                exit(5);
                     96:        }
                     97:        sfi = fdopen(s, "r");
                     98:        sfo = fdopen(s, "w");
                     99:        if (sfi == NULL || sfo == NULL) {
                    100:                perror("whois: fdopen");
                    101:                (void)close(s);
                    102:                exit(1);
                    103:        }
                    104:        (void)fprintf(sfo, "%s\r\n", *argv);
                    105:        (void)fflush(sfo);
                    106:        while ((ch = getc(sfi)) != EOF)
                    107:                putchar(ch);
                    108:        exit(0);
                    109: }
                    110: 
                    111: static
                    112: usage()
                    113: {
                    114:        (void)fprintf(stderr, "usage: whois [-h host] name\n");
                    115:        exit(1);
                    116: }

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