finger.c

来自「这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统」· C语言 代码 · 共 179 行

/*
 * 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. 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.
 *
 * 8/2/97 - Ted Felix <[e-mail]>
 *          Ported to Win32 from 4.4BSD-LITE2 at wcarchive.
 *          NT Workstation already has finger, and it runs fine under
 *          Win95.  Thought I'd do this anyways since not everyone has
 *          access to NT.
 *          Had to remove local handling.	 Otherwise, same as whois.
 */

/*
 * Finger prints out information about users.  It is not portable since
 * certain fields (e.g. the full user name, office, and phone numbers) are
 * extracted from the gecos field of the passwd file which other UNIXes
 * may not have or may use for other things.
 *
 * There are currently two output formats; the short format is one line
 * per user and displays login name, tty, login time, real name, idle time,
 * and office location/phone number.  The long format gives the same
 * information (in a more legible format) as well as home directory, shell,
 * mail info, and .plan/.project files.
 */

#include <winsock2.h>
#include "err.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "various.h"
#include "getopt.h"

char *__progname;

time_t now;
int lflag, mflag, pplan, sflag;

static void userlist(int, char **);
void usage();

int
main(int argc, char **argv)
{
	int ch;

	while ((ch = getopt(argc, argv, "lmps")) != EOF)
		switch(ch) {
		case 'l':
			lflag = 1;		/* long format */
			break;
		case 'm':
			mflag = 1;		/* force exact match of names */
			break;
		case 'p':
			pplan = 1;		/* don't show .plan/.project */
			break;
		case 's':
			sflag = 1;		/* short format */
			break;
		case '?':
		default:
			(void)fprintf(stderr,
			    "usage: finger [-lmps] login [...]\n");
			exit(1);
		}
	argc -= optind;
	argv += optind;

	(void)time(&now);
	if (!*argv) {
		usage();
	} else {
		userlist(argc, argv);
		/*
		 * Assign explicit "large" format if names given and -s not
		 * explicitly stated.  Force the -l AFTER we get names so any
		 * remote finger attempts specified won't be mishandled.
		 */
		if (!sflag)
			lflag = 1;	/* if -s not explicit, force -l */
	}
	return 0;
}


static void
userlist(int argc, char **argv)
{
	int *used;
	char **ap, **nargv, **np, **p;
	WORD wVersionRequested;
	WSADATA wsaData;
	int iErr;


	if ((nargv = (char**) malloc((argc+1) * sizeof(char *))) == NULL ||
	    (used = (int*) calloc(argc, sizeof(int))) == NULL)
		err(1, NULL);

	/* Pull out all network requests into nargv. */
	for (ap = p = argv, np = nargv; *p; ++p)
		if (index(*p, '@'))
			*np++ = *p;
		else
			*ap++ = *p;

	*np++ = NULL;
	*ap++ = NULL;

	/* If there are local requests */
	if (*argv)
	{
		fprintf(stderr, "Warning: Can't do local finger\n");
	}

	/* Start winsock */
	wVersionRequested = MAKEWORD( 1, 1 );
	iErr = WSAStartup( wVersionRequested, &wsaData );
	if ( iErr != 0 )
	{
		/* Tell the user that we couldn't find a usable */
		/* WinSock DLL.                                  */
		fprintf(stderr, "WSAStartup failed\n");
		return;
	}

	/* Handle network requests. */
	for (p = nargv; *p;)
		netfinger(*p++);

	/* Bring down winsock */
	WSACleanup();
	exit(0);
}

void usage()
{
	(void)fprintf(stderr,
	              "usage: finger [-lmps] login [...]\n");
	exit(1);
}