finger.c

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/*
 * 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 <tfelix@fred.net>
 *          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 "precomp.h"

#include <time.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 = NULL;
    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");
        free(nargv);
        free(used);
        return;
    }

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

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

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