4.4BSD/usr/src/usr.bin/finger/finger.c
/*
* 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)finger.c 8.1 (Berkeley) 6/6/93";
#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 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 <sys/param.h>
#include <fcntl.h>
#include <time.h>
#include <pwd.h>
#include <utmp.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <db.h>
#include "finger.h"
DB *db;
time_t now;
int entries, lflag, mflag, pplan, sflag;
char tbuf[1024];
static void loginlist __P((void));
static void userlist __P((int, char **));
main(argc, argv)
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);
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)
if (lflag)
lflag_print();
else
sflag_print();
exit(0);
}
static void
loginlist()
{
register PERSON *pn;
DBT data, key;
struct passwd *pw;
struct utmp user;
int r, sflag;
char name[UT_NAMESIZE + 1];
if (!freopen(_PATH_UTMP, "r", stdin))
err("%s: %s", _PATH_UTMP, strerror(errno));
name[UT_NAMESIZE] = NULL;
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);
}
if (db && lflag)
for (sflag = R_FIRST;; sflag = R_NEXT) {
r = (*db->seq)(db, &key, &data, sflag);
if (r == -1)
err("db seq: %s", strerror(errno));
if (r == 1)
break;
enter_lastlog(*(PERSON **)data.data);
}
}
static void
userlist(argc, argv)
register int argc;
register char **argv;
{
register PERSON *pn;
DBT data, key;
struct utmp user;
struct passwd *pw;
int r, sflag, *used, *ip;
char **ap, **nargv, **np, **p;
if ((nargv = malloc(argc * sizeof(char *))) == NULL ||
(used = calloc(argc, sizeof(int))) == NULL)
err("%s", strerror(errno));
/* Pull out all network requests. */
for (ap = p = argv, np = nargv; *p; ++p)
if (index(*p, '@'))
*np++ = *p;
else
*ap++ = *p;
*np++ = NULL;
*ap++ = NULL;
if (!*argv)
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)
for (p = argv; *p; ++p)
if (pw = getpwnam(*p))
enter_person(pw);
else
(void)fprintf(stderr,
"finger: %s: no such user\n", *p);
else {
while (pw = getpwent())
for (p = argv, ip = used; *p; ++p, ++ip)
if (match(pw, *p)) {
enter_person(pw);
*ip = 1;
}
for (p = argv, ip = used; *p; ++p, ++ip)
if (!*ip)
(void)fprintf(stderr,
"finger: %s: no such user\n", *p);
}
/* Handle network requests. */
net: for (p = nargv; *p;)
netfinger(*p++);
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("%s: %s", _PATH_UTMP, strerror(errno));
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);
}
if (db)
for (sflag = R_FIRST;; sflag = R_NEXT) {
r = (*db->seq)(db, &key, &data, sflag);
if (r == -1)
err("db seq: %s", strerror(errno));
if (r == 1)
break;
enter_lastlog(*(PERSON **)data.data);
}
}