NetBSD/usr.bin/finger/finger.c

301 lines
7.7 KiB
C

/* $NetBSD: finger.c,v 1.30 2016/09/05 00:40:28 sevan Exp $ */
/*
* 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)finger.c 8.5 (Berkeley) 5/4/95";
#else
__RCSID("$NetBSD: finger.c,v 1.30 2016/09/05 00:40:28 sevan Exp $");
#endif
#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 <db.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <locale.h>
#include <langinfo.h>
#include "utmpentry.h"
#include "finger.h"
#include "extern.h"
DB *db;
time_t now;
int entries, gflag, lflag, mflag, oflag, sflag, eightflag, pplan;
char tbuf[1024];
struct utmpentry *ehead;
static void loginlist(void);
static void userlist(int, char **);
int
main(int argc, char **argv)
{
int ch;
/* Allow user's locale settings to affect character output. */
setlocale(LC_CTYPE, "");
/*
* Reset back to the C locale, unless we are using a known
* single-byte 8-bit locale.
*/
if (strncmp(nl_langinfo(CODESET), "ISO8859-", 8))
setlocale(LC_CTYPE, "C");
oflag = 1; /* default to old "office" behavior */
while ((ch = getopt(argc, argv, "lmpshog8")) != -1)
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 'h':
oflag = 0; /* remote host info */
break;
case 'o':
oflag = 1; /* office info */
break;
case 'g':
gflag = 1; /* no gecos info, besides name */
break;
case '8':
eightflag = 1; /* 8-bit pass-through */
break;
case '?':
default:
(void)fprintf(stderr,
"usage: finger [-lmpshog8] [login ...]\n");
exit(1);
}
argc -= optind;
argv += optind;
(void)time(&now);
setpassent(1);
entries = getutentries(NULL, &ehead);
if (argc == 0) {
/*
* 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();
}
return (0);
}
static void
loginlist(void)
{
PERSON *pn;
DBT data, key;
struct passwd *pw;
int r, seqflag;
struct utmpentry *ep;
for (ep = ehead; ep; ep = ep->next) {
if ((pn = find_person(ep->name)) == NULL) {
if ((pw = getpwnam(ep->name)) == NULL)
continue;
pn = enter_person(pw);
}
enter_where(ep, pn);
}
if (db && lflag)
for (seqflag = R_FIRST;; seqflag = R_NEXT) {
PERSON *tmp;
r = (*db->seq)(db, &key, &data, seqflag);
if (r == -1)
err(1, "db seq");
if (r == 1)
break;
memmove(&tmp, data.data, sizeof tmp);
enter_lastlog(tmp);
}
}
static void
userlist(int argc, char **argv)
{
PERSON *pn;
DBT data, key;
struct passwd *pw;
int r, seqflag, *used, *ip;
char **ap, **nargv, **np, **p;
struct utmpentry *ep;
if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL ||
(used = calloc(argc, sizeof(int))) == NULL)
err(1, NULL);
/* Pull out all network requests. */
for (ap = p = argv, np = nargv; *p; ++p)
if (strchr(*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)) != NULL)
enter_person(pw);
else
warnx("%s: no such user", *p);
} else {
while ((pw = getpwent()) != NULL)
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)
warnx("%s: no such user", *p);
}
/* Handle network requests. */
net:
for (p = nargv; *p;)
netfinger(*p++);
if (entries == 0)
goto done;
/*
* Scan thru the list of users currently logged in, saving
* appropriate data whenever a match occurs.
*/
for (ep = ehead; ep; ep = ep->next) {
if ((pn = find_person(ep->name)) == NULL)
continue;
enter_where(ep, pn);
}
if (db != NULL)
for (seqflag = R_FIRST;; seqflag = R_NEXT) {
PERSON *tmp;
r = (*db->seq)(db, &key, &data, seqflag);
if (r == -1)
err(1, "db seq");
if (r == 1)
break;
memmove(&tmp, data.data, sizeof tmp);
enter_lastlog(tmp);
}
done:
free(nargv);
free(used);
}