/*
* Copyright 1989 - 1994, Julianne Frances Haugh
* All rights reserved.
*
* 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 Julianne F. Haugh 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 JULIE HAUGH 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 JULIE HAUGH 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.
*/
#include <config.h>
#ident "$Id$"
#include <getopt.h>
#include <lastlog.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include "defines.h"
#include "prototypes.h"
/*
* Needed for MkLinux DR1/2/2.1 - J.
*/
#ifndef LASTLOG_FILE
#define LASTLOG_FILE "/var/log/lastlog"
#endif
/*
* Global variables
*/
static FILE *lastlogfile; /* lastlog file stream */
static long umin; /* if uflg, only display users with uid >= umin */
static long umax; /* if uflg, only display users with uid <= umax */
static int days; /* number of days to consider for print command */
static time_t seconds; /* that number of days in seconds */
static int inverse_days; /* number of days to consider for print command */
static time_t inverse_seconds; /* that number of days in seconds */
static int uflg = 0; /* print only an user of range of users */
static int tflg = 0; /* print is restricted to most recent days */
static int bflg = 0; /* print excludes most recent days */
static struct lastlog lastlog; /* scratch structure to play with ... */
static struct stat statbuf; /* fstat buffer for file size */
static struct passwd *pwent;
#define NOW (time ((time_t *) 0))
static void usage (void)
{
fprintf (stdout, _("Usage: lastlog [options]\n"
"\n"
"Options:\n"
" -b, --before DAYS print only lastlog records older than DAYS\n"
" -h, --help display this help message and exit\n"
" -t, --time DAYS print only lastlog records more recent than DAYS\n"
" -u, --user LOGIN print lastlog record of the specified LOGIN\n"
"\n"));
exit (1);
}
static void print_one (const struct passwd *pw)
{
static int once;
char *cp;
struct tm *tm;
time_t ll_time;
#ifdef HAVE_STRFTIME
char ptime[80];
#endif
if (!pw)
return;
if (!once) {
#ifdef HAVE_LL_HOST
printf (_
("Username Port From Latest\n"));
#else
printf (_("Username Port Latest\n"));
#endif
once++;
}
ll_time = lastlog.ll_time;
tm = localtime (&ll_time);
#ifdef HAVE_STRFTIME
strftime (ptime, sizeof (ptime), "%a %b %e %H:%M:%S %z %Y", tm);
cp = ptime;
#else
cp = asctime (tm);
cp[24] = '\0';
#endif
if (lastlog.ll_time == (time_t) 0)
cp = _("**Never logged in**\0");
#ifdef HAVE_LL_HOST
printf ("%-16s %-8.8s %-16.16s %s\n", pw->pw_name,
lastlog.ll_line, lastlog.ll_host, cp);
#else
printf ("%-16s\t%-8.8s %s\n", pw->pw_name, lastlog.ll_line, cp);
#endif
}
static void print (void)
{
off_t offset;
uid_t user;
setpwent ();
while ((pwent = getpwent ())) {
user = pwent->pw_uid;
if (uflg &&
((umin != -1 && user < umin) ||
(umax != -1 && user > umax)))
continue;
offset = user * sizeof lastlog;
fseeko (lastlogfile, offset, SEEK_SET);
if (fread ((char *) &lastlog, sizeof lastlog, 1,
lastlogfile) != 1)
continue;
if (tflg && NOW - lastlog.ll_time > seconds)
continue;
if (bflg && NOW - lastlog.ll_time < inverse_seconds)
continue;
print_one (pwent);
}
}
int main (int argc, char **argv)
{
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
{
int c;
static struct option const longopts[] = {
{"help", no_argument, NULL, 'h'},
{"time", required_argument, NULL, 't'},
{"before", required_argument, NULL, 'b'},
{"user", required_argument, NULL, 'u'},
{NULL, 0, NULL, '\0'}
};
while ((c =
getopt_long (argc, argv, "ht:b:u:", longopts,
NULL)) != -1) {
switch (c) {
case 'h':
usage ();
break;
case 't':
days = atoi (optarg);
seconds = days * DAY;
tflg++;
break;
case 'b':
inverse_days = atoi (optarg);
inverse_seconds = inverse_days * DAY;
bflg++;
break;
case 'u':
/*
* The user can be:
* - a login name
* - numerical
* - a numerical login ID
* - a range (-x, x-, x-y)
*/
uflg++;
pwent = xgetpwnam (optarg);
if (NULL != pwent) {
umin = pwent->pw_uid;
umax = umin;
} else {
char *endptr = NULL;
uid_t user = strtol(optarg, &endptr, 10);
if (*optarg != '\0' && *endptr == '\0') {
if (user < 0) {
/* -<userid> */
umin = -1;
umax = -user;
} else {
/* <userid> */
umin = user;
umax = user;
}
} else if (endptr[0] == '-' && endptr[1] == '\0') {
/* <userid>- */
umin = user;
umax = -1;
} else if (*endptr == '-') {
/* <userid>-<userid> */
umin = user;
umax = atol(endptr+1);
} else {
fprintf (stderr,
_("Unknown user or range: %s\n"),
optarg);
exit (1);
}
}
break;
default:
usage ();
break;
}
}
if (argc > optind) {
fprintf (stderr,
_("lastlog: unexpected argument: %s\n"),
argv[optind]);
usage();
}
}
if ((lastlogfile = fopen (LASTLOG_FILE, "r")) == (FILE *) 0) {
perror (LASTLOG_FILE);
exit (1);
}
print ();
fclose (lastlogfile);
exit (0);
}