text: /*	$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);
  }
  