OpenBSD-4.6/usr.bin/finger/finger.c
/* $OpenBSD: finger.c,v 1.16 2004/03/15 02:50:29 tedu Exp $ */
/*
* Copyright (c) 1989 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.
*/
/*
* Luke Mewburn <lukem@netbsd.org> added the following on 961121:
* - mail status ("No Mail", "Mail read:...", or "New Mail ...,
* Unread since ...".)
* - 4 digit phone extensions (3210 is printed as x3210.)
* - host/office toggling in short format with -h & -o.
* - short day names (`Tue' printed instead of `Jun 21' if the
* login time is < 6 days.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)finger.c 5.22 (Berkeley) 6/29/90";*/
static const char rcsid[] = "$OpenBSD: finger.c,v 1.16 2004/03/15 02:50:29 tedu Exp $";
#endif /* not lint */
/*
* 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 either remote host information (default) or office location/phone
* number, depending on if -h or -o is used respectively.
* 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 <sys/param.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <err.h>
#include "finger.h"
#include "extern.h"
time_t now;
int entries, lflag, sflag, mflag, oflag, pplan, Mflag;
char tbuf[1024];
PERSON *htab[HSIZE];
PERSON *phead, *ptail;
int
main(int argc, char *argv[])
{
extern int optind;
extern char *__progname;
int ch;
char domain[MAXHOSTNAMELEN];
struct stat sb;
oflag = 1; /* default to old "office" behavior */
while ((ch = getopt(argc, argv, "lmMpsho")) != -1)
switch(ch) {
case 'l':
lflag = 1; /* long format */
break;
case 'm':
mflag = 1; /* force exact match of names */
break;
case 'M':
Mflag = 1; /* allow name matching */
break;
case 'p':
pplan = 1; /* don't show .plan/.project */
break;
case 's':
sflag = 1; /* short format */
break;
case 'h':
oflag = 0; /* remote host info */
break;
case 'o':
oflag = 1; /* office info */
break;
case '?':
default:
(void)fprintf(stderr,
"usage: %s [-hlMmops] [login ...]\n", __progname);
exit(1);
}
argc -= optind;
argv += optind;
/* If a domainname is set, increment mflag. */
if ((getdomainname(domain, sizeof(domain)) == 0) && domain[0])
mflag++;
/* If _PATH_MP_DB is larger than 1MB, increment mflag. */
if (stat(_PATH_MP_DB, &sb) == 0) {
if (sb.st_size > 1048576)
mflag++;
}
(void)time(&now);
setpassent(1);
if (!*argv) {
/*
* Assign explicit "small" format if no names given and -l
* not selected. Force the -s BEFORE we get names so proper
* screening will be done.
*/
if (!lflag)
sflag = 1; /* if -l not explicit, force -s */
loginlist();
if (entries == 0)
(void)printf("No one logged on.\n");
} 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 */
}
if (entries != 0) {
if (lflag)
lflag_print();
else
sflag_print();
}
exit(0);
}
void
loginlist(void)
{
PERSON *pn;
struct passwd *pw;
struct utmp user;
char name[UT_NAMESIZE + 1];
if (!freopen(_PATH_UTMP, "r", stdin))
err(2, _PATH_UTMP);
name[UT_NAMESIZE] = '\0';
while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
if (!user.ut_name[0])
continue;
if ((pn = find_person(user.ut_name)) == NULL) {
bcopy(user.ut_name, name, UT_NAMESIZE);
if ((pw = getpwnam(name)) == NULL)
continue;
pn = enter_person(pw);
}
enter_where(&user, pn);
}
for (pn = phead; lflag && pn != NULL; pn = pn->next)
enter_lastlog(pn);
}
void
userlist(int argc, char **argv)
{
int i;
PERSON *pn;
PERSON *nethead, **nettail;
struct utmp user;
struct passwd *pw;
int dolocal, *used;
if (!(used = (int *)calloc((u_int)argc, (u_int)sizeof(int))))
err(2, "malloc");
/* pull out all network requests */
for (i = 0, dolocal = 0, nettail = &nethead; i < argc; i++) {
if (!strchr(argv[i], '@')) {
dolocal = 1;
continue;
}
pn = palloc();
*nettail = pn;
nettail = &pn->next;
pn->name = argv[i];
used[i] = -1;
}
*nettail = NULL;
if (!dolocal)
goto net;
/*
* traverse the list of possible login names and check the login name
* and real name against the name specified by the user.
*/
if ((mflag - Mflag) > 0) {
for (i = 0; i < argc; i++)
if (used[i] >= 0 && (pw = getpwnam(argv[i]))) {
enter_person(pw);
used[i] = 1;
}
} else while ((pw = getpwent()) != NULL)
for (i = 0; i < argc; i++)
if (used[i] >= 0 &&
(!strcasecmp(pw->pw_name, argv[i]) ||
match(pw, argv[i]))) {
enter_person(pw);
used[i] = 1;
}
/* list errors */
for (i = 0; i < argc; i++)
if (!used[i])
warnx("%s: no such user.", argv[i]);
/* handle network requests */
net: for (pn = nethead; pn; pn = pn->next) {
netfinger(pn->name);
if (pn->next || entries)
putchar('\n');
}
if (entries == 0)
return;
/*
* Scan thru the list of users currently logged in, saving
* appropriate data whenever a match occurs.
*/
if (!freopen(_PATH_UTMP, "r", stdin))
err(1, _PATH_UTMP);
while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
if (!user.ut_name[0])
continue;
if ((pn = find_person(user.ut_name)) == NULL)
continue;
enter_where(&user, pn);
}
for (pn = phead; pn != NULL; pn = pn->next)
enter_lastlog(pn);
}