home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)net.c 5.5 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <bsdsocket.h>
- #include <netinet/in.h>
- #include <netdb.h>
- #include <stdio.h>
- #include <ctype.h>
- #include <inline/socket.h>
-
- netfinger(name)
- char *name;
- {
- extern int lflag;
- register int c, lastc;
- struct in_addr defaddr;
- struct hostent *hp, def;
- struct servent *sp;
- struct sockaddr_in sin;
- int s;
- char *alist[1], *host, *rindex();
- u_long inet_addr();
-
- if (!(host = rindex(name, '@')))
- return;
- *host++ = NULL;
- if (!(hp = gethostbyname(host))) {
- defaddr.s_addr = inet_addr(host);
- if (defaddr.s_addr == -1) {
- (void)fprintf(stderr,
- "finger: unknown host: %s\n", host);
- return;
- }
- def.h_name = host;
- def.h_addr_list = alist;
- def.h_addr = (char *)&defaddr;
- def.h_length = sizeof(struct in_addr);
- def.h_addrtype = AF_INET;
- def.h_aliases = 0;
- hp = &def;
- }
- if (!(sp = getservbyname("finger", "tcp"))) {
- (void)fprintf(stderr, "finger: tcp/finger: unknown service\n");
- return;
- }
- sin.sin_family = hp->h_addrtype;
- bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
- sin.sin_port = sp->s_port;
- if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
- perror("finger: socket");
- return;
- }
-
- /* have network connection; identify the host connected with */
- (void)printf("[%s]\n", hp->h_name);
- if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
- perror("finger: connect");
- (void)s_close(s);
- return;
- }
-
- /* -l flag for remote fingerd */
- if (lflag)
- (void)send(s, "/W ", 3, 0);
- /* send the name followed by <CR><LF> */
- (void)send(s, name, strlen(name),0);
- (void)send(s, "\r\n", 2,0);
-
- /*
- * Read from the remote system; once we're connected, we assume some
- * data. If none arrives, we hang until the user interrupts.
- *
- * If we see a <CR> or a <CR> with the high bit set, treat it as
- * a newline; if followed by a newline character, only output one
- * newline.
- *
- * Otherwise, all high bits are stripped; if it isn't printable and
- * it isn't a space, we can simply set the 7th bit. Every ASCII
- * character with bit 7 set is printable.
- */
- while ((c = sgetc(s)) != EOF) {
- c &= 0x7f;
- if (c == 0x0d) {
- c = '\n';
- lastc = '\r';
- } else {
- if (!isprint(c) && !isspace(c))
- c |= 0x40;
- if (lastc != '\r' || c != '\n')
- lastc = c;
- else {
- lastc = '\n';
- continue;
- }
- }
- putchar(c);
- }
- if (lastc != '\n')
- putchar('\n');
- s_close(s);
- }
-