162 lines
4.3 KiB
C
162 lines
4.3 KiB
C
/* $NetBSD: net.c,v 1.20 2003/08/07 11:13:45 agc Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)net.c 8.4 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: net.c,v 1.20 2003/08/07 11:13:45 agc Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <time.h>
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#include <db.h>
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#include <unistd.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <err.h>
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#include "utmpentry.h"
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#include "finger.h"
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#include "extern.h"
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void
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netfinger(name)
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char *name;
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{
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FILE *fp;
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int c, lastc;
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int s;
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char *host;
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struct addrinfo hints, *res, *res0;
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int error;
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char *emsg = NULL;
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lastc = 0;
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if (!(host = strrchr(name, '@')))
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return;
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*host++ = '\0';
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_CANONNAME;
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error = getaddrinfo(host, "finger", &hints, &res0);
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if (error) {
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warnx("%s: %s", gai_strerror(error), host);
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return;
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}
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s = -1;
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for (res = res0; res; res = res->ai_next) {
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s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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if (s < 0) {
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emsg = "socket";
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continue;
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}
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if (connect(s, res->ai_addr, res->ai_addrlen)) {
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close(s);
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s = -1;
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emsg = "connect";
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continue;
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}
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break;
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}
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if (s < 0) {
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if (emsg != NULL)
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warn("%s", emsg);
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return;
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}
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/* have network connection; identify the host connected with */
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(void)printf("[%s]\n", res0->ai_canonname ? res0->ai_canonname : host);
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/* -l flag for remote fingerd */
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if (lflag)
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write(s, "/W ", 3);
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/* send the name followed by <CR><LF> */
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(void)write(s, name, strlen(name));
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(void)write(s, "\r\n", 2);
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/*
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* Read from the remote system; once we're connected, we assume some
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* data. If none arrives, we hang until the user interrupts.
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*
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* If we see a <CR> followed by a newline character, only output
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* one newline.
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*
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* If a character isn't printable and it isn't a space, we strip the
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* 8th bit and set the 7th bit. Every ASCII character with bit 7 set
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* is printable.
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*/
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if ((fp = fdopen(s, "r")) != NULL)
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while ((c = getc(fp)) != EOF) {
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if (c == '\r') {
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if (lastc == '\r') /* ^M^M - skip dupes */
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continue;
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c = '\n';
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lastc = '\r';
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} else {
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if (!(eightflag || isprint(c) || isspace(c))) {
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c &= 0x7f;
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c |= 0x40;
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}
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if (lastc != '\r' || c != '\n')
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lastc = c;
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else {
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lastc = '\n';
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continue;
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}
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}
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putchar(c);
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}
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if (lastc != '\n')
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putchar('\n');
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(void)fclose(fp);
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}
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