8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
410 lines
10 KiB
C
410 lines
10 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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/*
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* Luke Mewburn <lm@rmit.edu.au> added the following on 940622:
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* - mail status ("No Mail", "Mail read:...", or "New Mail ...,
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* Unread since ...".)
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* - 4 digit phone extensions (3210 is printed as x3210.)
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* - host/office toggling in short format with -h & -o.
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* - short day names (`Tue' printed instead of `Jun 21' if the
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* login time is < 6 days.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)finger.c 8.5 (Berkeley) 5/4/95";
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#endif
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Finger prints out information about users. It is not portable since
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* certain fields (e.g. the full user name, office, and phone numbers) are
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* extracted from the gecos field of the passwd file which other UNIXes
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* may not have or may use for other things.
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*
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* There are currently two output formats; the short format is one line
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* per user and displays login name, tty, login time, real name, idle time,
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* and either remote host information (default) or office location/phone
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* number, depending on if -h or -o is used respectively.
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* The long format gives the same information (in a more legible format) as
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* well as home directory, shell, mail info, and .plan/.project files.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <db.h>
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#include <err.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <utmpx.h>
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#include <locale.h>
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#include "finger.h"
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#include "pathnames.h"
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DB *db;
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time_t now;
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static int kflag, mflag, sflag;
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int entries, gflag, lflag, pplan, oflag;
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sa_family_t family = PF_UNSPEC;
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int d_first = -1;
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char tbuf[1024];
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int invoker_root = 0;
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static void loginlist(void);
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static int option(int, char **);
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static void usage(void);
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static void userlist(int, char **);
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static int
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option(int argc, char **argv)
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{
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int ch;
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optind = 1; /* reset getopt */
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while ((ch = getopt(argc, argv, "46gklmpsho")) != -1)
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switch(ch) {
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case '4':
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family = AF_INET;
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break;
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case '6':
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family = AF_INET6;
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break;
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case 'g':
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gflag = 1;
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break;
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case 'k':
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kflag = 1; /* keep going without utmp */
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break;
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case 'l':
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lflag = 1; /* long format */
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break;
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case 'm':
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mflag = 1; /* force exact match of names */
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break;
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case 'p':
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pplan = 1; /* don't show .plan/.project */
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break;
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case 's':
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sflag = 1; /* short format */
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break;
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case 'h':
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oflag = 0; /* remote host info */
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break;
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case 'o':
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oflag = 1; /* office info */
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break;
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case '?':
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default:
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usage();
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}
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return optind;
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: finger [-46gklmpsho] [user ...] [user@host ...]\n");
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exit(1);
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}
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int
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main(int argc, char **argv)
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{
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int envargc, argcnt;
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char *envargv[3];
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struct passwd *pw;
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static char myname[] = "finger";
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if (getuid() == 0 || geteuid() == 0) {
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invoker_root = 1;
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if ((pw = getpwnam(UNPRIV_NAME)) && pw->pw_uid > 0) {
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if (setgid(pw->pw_gid) != 0)
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err(1, "setgid()");
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if (setuid(pw->pw_uid) != 0)
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err(1, "setuid()");
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} else {
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if (setgid(UNPRIV_UGID) != 0)
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err(1, "setgid()");
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if (setuid(UNPRIV_UGID) != 0)
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err(1, "setuid()");
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}
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}
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(void) setlocale(LC_ALL, "");
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/* remove this line to get remote host */
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oflag = 1; /* default to old "office" behavior */
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/*
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* Process environment variables followed by command line arguments.
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*/
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if ((envargv[1] = getenv("FINGER"))) {
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envargc = 2;
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envargv[0] = myname;
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envargv[2] = NULL;
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(void) option(envargc, envargv);
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}
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argcnt = option(argc, argv);
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argc -= argcnt;
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argv += argcnt;
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(void)time(&now);
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setpassent(1);
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if (!*argv) {
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/*
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* Assign explicit "small" format if no names given and -l
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* not selected. Force the -s BEFORE we get names so proper
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* screening will be done.
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*/
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if (!lflag)
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sflag = 1; /* if -l not explicit, force -s */
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loginlist();
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if (entries == 0)
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(void)printf("No one logged on.\n");
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} else {
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userlist(argc, argv);
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/*
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* Assign explicit "large" format if names given and -s not
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* explicitly stated. Force the -l AFTER we get names so any
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* remote finger attempts specified won't be mishandled.
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*/
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if (!sflag)
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lflag = 1; /* if -s not explicit, force -l */
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}
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if (entries) {
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if (lflag)
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lflag_print();
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else
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sflag_print();
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}
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return (0);
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}
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static void
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loginlist(void)
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{
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PERSON *pn;
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DBT data, key;
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struct passwd *pw;
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struct utmpx *user;
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int r, sflag1;
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if (kflag)
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errx(1, "can't list logins without reading utmp");
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setutxent();
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while ((user = getutxent()) != NULL) {
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if (user->ut_type != USER_PROCESS)
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continue;
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if ((pn = find_person(user->ut_user)) == NULL) {
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if ((pw = getpwnam(user->ut_user)) == NULL)
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continue;
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if (hide(pw))
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continue;
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pn = enter_person(pw);
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}
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enter_where(user, pn);
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}
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endutxent();
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if (db && lflag)
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for (sflag1 = R_FIRST;; sflag1 = R_NEXT) {
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PERSON *tmp;
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r = (*db->seq)(db, &key, &data, sflag1);
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if (r == -1)
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err(1, "db seq");
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if (r == 1)
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break;
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memmove(&tmp, data.data, sizeof tmp);
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enter_lastlog(tmp);
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}
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}
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static void
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userlist(int argc, char **argv)
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{
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PERSON *pn;
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DBT data, key;
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struct utmpx *user;
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struct passwd *pw;
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int r, sflag1, *used, *ip;
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char **ap, **nargv, **np, **p;
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FILE *conf_fp;
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char conf_alias[LINE_MAX];
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char *conf_realname;
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int conf_length;
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if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL ||
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(used = calloc(argc, sizeof(int))) == NULL)
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err(1, NULL);
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/* Pull out all network requests. */
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for (ap = p = argv, np = nargv; *p; ++p)
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if (strchr(*p, '@'))
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*np++ = *p;
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else
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*ap++ = *p;
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*np++ = NULL;
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*ap++ = NULL;
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if (!*argv)
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goto net;
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/*
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* Mark any arguments beginning with '/' as invalid so that we
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* don't accidentally confuse them with expansions from finger.conf
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*/
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for (p = argv, ip = used; *p; ++p, ++ip)
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if (**p == '/') {
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*ip = 1;
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warnx("%s: no such user", *p);
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}
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/*
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* Traverse the finger alias configuration file of the form
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* alias:(user|alias), ignoring comment lines beginning '#'.
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*/
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if ((conf_fp = fopen(_PATH_FINGERCONF, "r")) != NULL) {
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while(fgets(conf_alias, sizeof(conf_alias), conf_fp) != NULL) {
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conf_length = strlen(conf_alias);
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if (*conf_alias == '#' || conf_alias[--conf_length] != '\n')
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continue;
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conf_alias[conf_length] = '\0'; /* Remove trailing LF */
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if ((conf_realname = strchr(conf_alias, ':')) == NULL)
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continue;
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*conf_realname = '\0'; /* Replace : with NUL */
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for (p = argv; *p; ++p) {
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if (strcmp(*p, conf_alias) == 0) {
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if ((*p = strdup(conf_realname+1)) == NULL) {
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err(1, NULL);
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}
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}
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}
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}
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(void)fclose(conf_fp);
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}
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/*
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* Traverse the list of possible login names and check the login name
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* and real name against the name specified by the user. If the name
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* begins with a '/', try to read the file of that name instead of
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* gathering the traditional finger information.
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*/
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if (mflag)
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for (p = argv, ip = used; *p; ++p, ++ip) {
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if (**p != '/' || *ip == 1 || !show_text("", *p, "")) {
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if (((pw = getpwnam(*p)) != NULL) && !hide(pw))
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enter_person(pw);
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else if (!*ip)
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warnx("%s: no such user", *p);
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}
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}
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else {
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while ((pw = getpwent()) != NULL) {
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for (p = argv, ip = used; *p; ++p, ++ip)
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if (**p == '/' && *ip != 1
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&& show_text("", *p, ""))
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*ip = 1;
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else if (match(pw, *p) && !hide(pw)) {
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enter_person(pw);
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*ip = 1;
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}
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}
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for (p = argv, ip = used; *p; ++p, ++ip)
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if (!*ip)
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warnx("%s: no such user", *p);
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}
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/* Handle network requests. */
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net: for (p = nargv; *p;) {
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netfinger(*p++);
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if (*p || entries)
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printf("\n");
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}
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free(nargv);
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free(used);
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if (entries == 0)
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return;
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if (kflag)
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return;
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/*
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* Scan thru the list of users currently logged in, saving
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* appropriate data whenever a match occurs.
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*/
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setutxent();
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while ((user = getutxent()) != NULL) {
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if (user->ut_type != USER_PROCESS)
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continue;
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if ((pn = find_person(user->ut_user)) == NULL)
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continue;
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enter_where(user, pn);
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}
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endutxent();
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if (db)
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for (sflag1 = R_FIRST;; sflag1 = R_NEXT) {
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PERSON *tmp;
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r = (*db->seq)(db, &key, &data, sflag1);
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if (r == -1)
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err(1, "db seq");
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if (r == 1)
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break;
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memmove(&tmp, data.data, sizeof tmp);
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enter_lastlog(tmp);
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}
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}
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