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/* $OpenBSD: net.c,v 1.4 1997/04/23 19:17:29 millert Exp $ */
/*
* 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";*/
static char rcsid[] = "$OpenBSD: net.c,v 1.4 1997/04/23 19:17:29 millert 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 <string.h>
#include <ctype.h>
netfinger(name)
char *name;
{
extern int lflag;
register FILE *fp;
register int c, lastc;
struct hostent *hp, def;
struct servent *sp;
struct sockaddr_in sin;
int s;
char *alist[1], *host;
if (!(host = strrchr(name, '@')))
return;
*host++ = NULL;
if (*host == NULL)
host = "localhost";
if (inet_aton(host, &sin.sin_addr) == 0) {
hp = gethostbyname(host);
if (hp == 0) {
(void)fprintf(stderr,
"finger: unknown host: %s\n", host);
return;
}
sin.sin_family = hp->h_addrtype;
bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
host = hp->h_name;
} else
sin.sin_family = AF_INET;
if (!(sp = getservbyname("finger", "tcp"))) {
(void)fprintf(stderr, "finger: tcp/finger: unknown service\n");
return;
}
sin.sin_port = sp->s_port;
if ((s = socket(sin.sin_family, SOCK_STREAM, 0)) < 0) {
perror("finger: socket");
return;
}
/* have network connection; identify the host connected with */
(void)printf("[%s]\n", host);
if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
perror("finger: connect");
(void)close(s);
return;
}
/* -l flag for remote fingerd */
if (lflag)
write(s, "/W ", 3);
/* send the name followed by <CR><LF> */
(void)write(s, name, strlen(name));
(void)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.
*
* 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.
*/
if (fp = fdopen(s, "r"))
while ((c = getc(fp)) != EOF) {
c &= 0x7f;
if (c == '\r') {
if (lastc == '\r')
continue;
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');
(void)fclose(fp);
}
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