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/*
* 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[] = "from: @(#)net.c 5.5 (Berkeley) 6/1/90";*/
char net_rcsid[] = "$Id: net.c,v 1.9 1999/09/14 10:51:11 dholland Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include "finger.h"
void netfinger(const char *name) {
register FILE *fp;
struct in_addr defaddr;
register int c, sawret, ateol;
struct hostent *hp, def;
struct servent *sp;
struct sockaddr_in sn;
int s;
char *alist[1], *host;
host = strrchr(name, '@');
if (!host) return;
*host++ = '\0';
memset(&sn, 0, sizeof(sn));
sp = getservbyname("finger", "tcp");
if (!sp) {
eprintf("finger: tcp/finger: unknown service\n");
return;
}
sn.sin_port = sp->s_port;
hp = gethostbyname(host);
if (!hp) {
if (!inet_aton(host, &defaddr)) {
eprintf("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;
}
sn.sin_family = hp->h_addrtype;
if (hp->h_length > (int)sizeof(sn.sin_addr)) {
hp->h_length = sizeof(sn.sin_addr);
}
memcpy(&sn.sin_addr, hp->h_addr, hp->h_length);
if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
eprintf("finger: socket: %s\n", strerror(errno));
return;
}
/* print hostname before connecting, in case it takes a while */
xprintf("[%s]\n", hp->h_name);
if (connect(s, (struct sockaddr *)&sn, sizeof(sn)) < 0) {
eprintf("finger: connect: %s\n", strerror(errno));
close(s);
return;
}
/* -l flag for remote fingerd */
if (lflag) write(s, "/W ", 3);
/* send the name followed by <CR><LF> */
write(s, name, strlen(name));
write(s, "\r\n", 2);
/*
* 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.
*
* Text is sent to xputc() for printability analysis.
*/
fp = fdopen(s, "r");
if (!fp) {
eprintf("finger: fdopen: %s\n", strerror(errno));
close(s);
return;
}
sawret = 0;
ateol = 1;
while ((c = getc(fp)) != EOF) {
c &= 0xff;
if (c == ('\r'|0x80) || c == ('\n'|0x80)) c &= 0x7f;
if (c == '\r') {
sawret = ateol = 1;
xputc('\n');
}
else if (sawret && c == '\n') {
sawret = 0;
/* don't print */
}
else {
if (c == '\n') ateol = 1;
sawret = 0;
xputc(c);
}
}
if (!ateol) xputc('\n');
fclose(fp);
}
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