# 2.11BSD#431 - /usr/src/ucb/finger/net.c

##### Functions

    netfinger         X

       1: /*
       2:  * Copyright (c) 1989 The Regents of the University of California.
       3:  * All rights reserved.
       4:  *
       5:  * This code is derived from software contributed to Berkeley by
       6:  * Tony Nardo.
       7:  *
       8:  * Redistribution and use in source and binary forms are permitted
       9:  * provided that the above copyright notice and this paragraph are
      10:  * duplicated in all such forms and that any documentation,
      11:  * advertising materials, and other materials related to such
      12:  * distribution and use acknowledge that the software was developed
      13:  * by the University of California, Berkeley.  The name of the
      14:  * University may not be used to endorse or promote products derived
      15:  * from this software without specific prior written permission.
      16:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
      17:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
      18:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
      19:  */
      20:
      21: #ifndef lint
      22: static char sccsid[] = "@(#)net.c	5.4 (Berkeley) 2/21/90";
      23: #endif /* not lint */
      24:
      25: #include <sys/types.h>
      26: #include <sys/socket.h>
      27: #include <netinet/in.h>
      28: #include <netdb.h>
      29: #include <stdio.h>
      30: #include <ctype.h>
      31:
      32: netfinger(name)
      33:     char *name;
      34: {
      35:     extern int lflag;
      36:     register FILE *fp;
      37:     register int c, lastc;
      38:     struct in_addr defaddr;
      39:     struct hostent *hp, def;
      40:     struct servent *sp;
      41:     struct sockaddr_in sin;
      42:     int s;
      43:     char *alist[1], *host, *rindex();
      44:     u_long inet_addr();
      45:
      46:     if (!(host = rindex(name, '@')))
      47:         return;
      48:     *host++ = NULL;
      49:     if (!(hp = gethostbyname(host))) {
      50:         defaddr.s_addr = inet_addr(host);
      51:         if (defaddr.s_addr == -1) {
      52:             (void)fprintf(stderr,
      53:                 "finger: unknown host: %s\n", host);
      54:             return;
      55:         }
      56:         def.h_name = host;
      57:         def.h_addr_list = alist;
      58:         def.h_addr = (char *)&defaddr;
      59:         def.h_length = sizeof(struct in_addr);
      60:         def.h_addrtype = AF_INET;
      61:         def.h_aliases = 0;
      62:         hp = &def;
      63:     }
      64:     if (!(sp = getservbyname("finger", "tcp"))) {
      65:         (void)fprintf(stderr, "finger: tcp/finger: unknown service\n");
      66:         return;
      67:     }
      68:     sin.sin_family = hp->h_addrtype;
      69:     bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
      70:     sin.sin_port = sp->s_port;
      71:     if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
      72:         perror("finger: socket");
      73:         return;
      74:     }
      75:
      76:     /* have network connection; identify the host connected with */
      77:     (void)printf("[%s]\n", hp->h_name);
      78:     if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
      79:         perror("finger: connect");
      80:         (void)close(s);
      81:         return;
      82:     }
      83:
      84:     /* -l flag for remote fingerd  */
      85:     if (lflag)
      86:         write(s, "/W ", 3);
      87:     /* send the name followed by <CR><LF> */
      88:     (void)write(s, name, strlen(name));
      89:     (void)write(s, "\r\n", 2);
      90:
      91:     /*
      92: 	 * Read from the remote system; once we're connected, we assume some
      93: 	 * data.  If none arrives, we hang until the user interrupts.
      94: 	 *
      95: 	 * If we see a <CR> or a <CR> with the high bit set, treat it as
      96: 	 * a newline; if followed by a newline character, only output one
      97: 	 * newline.
      98: 	 *
      99: 	 * Otherwise, all high bits are stripped; if it isn't printable and
     100: 	 * it isn't a space, we can simply set the 7th bit.  Every ASCII
     101: 	 * character with bit 7 set is printable.
     102: 	 */
     103:     if (fp = fdopen(s, "r"))
     104:         while ((c = getc(fp)) != EOF) {
     105:             c &= 0x7f;
     106:             if (c == 0x0d) {
     107:                 c = '\n';
     108:                 lastc = '\r';
     109:             } else {
     110:                 if (!isprint(c) && !isspace(c))
     111:                     c |= 0x40;
     112:                 if (lastc != '\r' || c != '\n')
     113:                     lastc = c;
     114:                 else {
     115:                     lastc = '\n';
     116:                     continue;
     117:                 }
     118:             }
     119:             putchar(c);
     120:         }
     121:     if (lastc != '\n')
     122:         putchar('\n');
     123:     (void)fclose(fp);
     124: }

#### Defined functions

netfinger defined in line 32; used 1 times

- in /usr/src/ucb/finger/finger.c line 204

#### Defined variables

sccsid defined in line 22; never used

Last modified: 1990-03-18 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1114 |