2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 static char sccsid[] = "@(#)net.c 8.4 (Berkeley) 4/28/95";
41 static const char rcsid[] =
46 #include <sys/types.h>
47 #include <sys/param.h>
48 #include <sys/socket.h>
49 #include <netinet/in.h>
50 #include <arpa/inet.h>
81 register int c, lastc;
82 struct in_addr defaddr;
83 struct hostent *hp, def;
85 struct sockaddr_in sin;
87 char *alist[1], *host;
91 if (!(host = rindex(name, '@')))
94 signal(SIGALRM, cleanup);
95 (void) alarm(TIME_LIMIT);
96 if (isdigit(*host) && (defaddr.s_addr = inet_addr(host)) != -1) {
98 def.h_addr_list = alist;
99 def.h_addr = (char *)&defaddr;
100 def.h_length = sizeof(struct in_addr);
101 def.h_addrtype = AF_INET;
104 } else if (!(hp = gethostbyname(host))) {
105 warnx("unknown host: %s", host);
108 if (!(sp = getservbyname("finger", "tcp"))) {
109 warnx("tcp/finger: unknown service");
112 sin.sin_family = hp->h_addrtype;
113 bcopy(hp->h_addr, (char *)&sin.sin_addr, MIN(hp->h_length,sizeof(sin.sin_addr)));
114 sin.sin_port = sp->s_port;
115 if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
116 perror("finger: socket");
120 /* have network connection; identify the host connected with */
121 (void)printf("[%s]\n", hp->h_name);
123 msg.msg_name = (void *)&sin;
124 msg.msg_namelen = sizeof sin;
128 msg.msg_controllen = 0;
131 /* -l flag for remote fingerd */
133 iov[msg.msg_iovlen].iov_base = "/W ";
134 iov[msg.msg_iovlen++].iov_len = 3;
136 /* send the name followed by <CR><LF> */
137 iov[msg.msg_iovlen].iov_base = name;
138 iov[msg.msg_iovlen++].iov_len = strlen(name);
139 iov[msg.msg_iovlen].iov_base = "\r\n";
140 iov[msg.msg_iovlen++].iov_len = 2;
142 /* -T disables T/TCP: compatibility option to finger broken hosts */
143 if (Tflag && connect(s, (struct sockaddr *)&sin, sizeof (sin))) {
144 perror("finger: connect");
148 if (sendmsg(s, &msg, 0) < 0) {
149 perror("finger: sendmsg");
155 * Read from the remote system; once we're connected, we assume some
156 * data. If none arrives, we hang until the user interrupts.
158 * If we see a <CR> or a <CR> with the high bit set, treat it as
159 * a newline; if followed by a newline character, only output one
162 * Otherwise, all high bits are stripped; if it isn't printable and
163 * it isn't a space, we can simply set the 7th bit. Every ASCII
164 * character with bit 7 set is printable.
167 if ((fp = fdopen(s, "r")) != NULL) {
170 while ((c = getc(fp)) != EOF) {
171 if (++cnt > OUTPUT_MAX) {
172 printf("\n\n Output truncated at %d bytes...\n",
177 if (lastc == '\r') /* ^M^M - skip dupes */
182 if (!isprint(c) && !isspace(c)) {
186 if (lastc != '\r' || c != '\n')
194 if (c != '\n' && ++line_len > _POSIX2_LINE_MAX) {
199 if (lastc == '\n' || lastc == '\r')
207 * Assume that whatever it was set errno...
209 perror("finger: read");