160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
/* $NetBSD: net.c,v 1.23 2009/04/12 06:18:54 lukem Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1989, 1993
|
|
* 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. 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)net.c 8.4 (Berkeley) 4/28/95";
|
|
#else
|
|
__RCSID("$NetBSD: net.c,v 1.23 2009/04/12 06:18:54 lukem Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <arpa/inet.h>
|
|
|
|
#include <netdb.h>
|
|
#include <time.h>
|
|
#include <db.h>
|
|
#include <unistd.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
|
|
#include "utmpentry.h"
|
|
|
|
#include "finger.h"
|
|
#include "extern.h"
|
|
|
|
void
|
|
netfinger(char *name)
|
|
{
|
|
FILE *fp;
|
|
int c, lastc;
|
|
int s;
|
|
char *host;
|
|
struct addrinfo hints, *res, *res0;
|
|
int error;
|
|
const char *emsg = NULL;
|
|
|
|
lastc = 0;
|
|
if (!(host = strrchr(name, '@')))
|
|
return;
|
|
*host++ = '\0';
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = PF_UNSPEC;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_flags = AI_CANONNAME;
|
|
error = getaddrinfo(host, "finger", &hints, &res0);
|
|
if (error) {
|
|
warnx("%s: %s", gai_strerror(error), host);
|
|
return;
|
|
}
|
|
|
|
s = -1;
|
|
for (res = res0; res; res = res->ai_next) {
|
|
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
|
|
if (s < 0) {
|
|
emsg = "socket";
|
|
continue;
|
|
}
|
|
|
|
if (connect(s, res->ai_addr, res->ai_addrlen)) {
|
|
close(s);
|
|
s = -1;
|
|
emsg = "connect";
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
if (s < 0) {
|
|
if (emsg != NULL)
|
|
warn("%s", emsg);
|
|
return;
|
|
}
|
|
|
|
/* have network connection; identify the host connected with */
|
|
(void)printf("[%s]\n", res0->ai_canonname ? res0->ai_canonname : host);
|
|
|
|
/* -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> followed by a newline character, only output
|
|
* one newline.
|
|
*
|
|
* If a character isn't printable and it isn't a space, we strip the
|
|
* 8th bit and set the 7th bit. Every ASCII character with bit 7 set
|
|
* is printable.
|
|
*/
|
|
if ((fp = fdopen(s, "r")) != NULL)
|
|
while ((c = getc(fp)) != EOF) {
|
|
if (c == '\r') {
|
|
if (lastc == '\r') /* ^M^M - skip dupes */
|
|
continue;
|
|
c = '\n';
|
|
lastc = '\r';
|
|
} else {
|
|
if (!(eightflag || isprint(c) || isspace(c))) {
|
|
c &= 0x7f;
|
|
c |= 0x40;
|
|
}
|
|
if (lastc != '\r' || c != '\n')
|
|
lastc = c;
|
|
else {
|
|
lastc = '\n';
|
|
continue;
|
|
}
|
|
}
|
|
putchar(c);
|
|
}
|
|
if (lastc != '\n')
|
|
putchar('\n');
|
|
(void)fclose(fp);
|
|
}
|