3a48f0954c
* NEWS, src/lastlog.c, man/lastlog.8.xml: Accept numerical user, or ranges with the -u option. * TODO: The same change should be done on faillog.
254 lines
6.5 KiB
C
254 lines
6.5 KiB
C
/*
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* Copyright 1989 - 1994, Julianne Frances Haugh
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* All rights reserved.
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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 Julianne F. Haugh 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 JULIE HAUGH 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 JULIE HAUGH 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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#include <config.h>
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#ident "$Id$"
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#include <getopt.h>
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#include <lastlog.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <time.h>
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#include "defines.h"
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#include "prototypes.h"
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/*
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* Needed for MkLinux DR1/2/2.1 - J.
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*/
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#ifndef LASTLOG_FILE
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#define LASTLOG_FILE "/var/log/lastlog"
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#endif
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/*
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* Global variables
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*/
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static FILE *lastlogfile; /* lastlog file stream */
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static long umin; /* if uflg, only display users with uid >= umin */
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static long umax; /* if uflg, only display users with uid <= umax */
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static int days; /* number of days to consider for print command */
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static time_t seconds; /* that number of days in seconds */
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static int inverse_days; /* number of days to consider for print command */
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static time_t inverse_seconds; /* that number of days in seconds */
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static int uflg = 0; /* print only an user of range of users */
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static int tflg = 0; /* print is restricted to most recent days */
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static int bflg = 0; /* print excludes most recent days */
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static struct lastlog lastlog; /* scratch structure to play with ... */
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static struct stat statbuf; /* fstat buffer for file size */
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static struct passwd *pwent;
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#define NOW (time ((time_t *) 0))
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static void usage (void)
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{
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fprintf (stdout, _("Usage: lastlog [options]\n"
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"\n"
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"Options:\n"
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" -b, --before DAYS print only lastlog records older than DAYS\n"
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" -h, --help display this help message and exit\n"
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" -t, --time DAYS print only lastlog records more recent than DAYS\n"
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" -u, --user LOGIN print lastlog record of the specified LOGIN\n"
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"\n"));
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exit (1);
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}
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static void print_one (const struct passwd *pw)
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{
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static int once;
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char *cp;
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struct tm *tm;
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time_t ll_time;
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#ifdef HAVE_STRFTIME
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char ptime[80];
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#endif
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if (!pw)
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return;
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if (!once) {
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#ifdef HAVE_LL_HOST
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printf (_
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("Username Port From Latest\n"));
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#else
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printf (_("Username Port Latest\n"));
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#endif
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once++;
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}
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ll_time = lastlog.ll_time;
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tm = localtime (&ll_time);
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#ifdef HAVE_STRFTIME
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strftime (ptime, sizeof (ptime), "%a %b %e %H:%M:%S %z %Y", tm);
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cp = ptime;
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#else
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cp = asctime (tm);
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cp[24] = '\0';
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#endif
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if (lastlog.ll_time == (time_t) 0)
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cp = _("**Never logged in**\0");
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#ifdef HAVE_LL_HOST
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printf ("%-16s %-8.8s %-16.16s %s\n", pw->pw_name,
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lastlog.ll_line, lastlog.ll_host, cp);
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#else
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printf ("%-16s\t%-8.8s %s\n", pw->pw_name, lastlog.ll_line, cp);
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#endif
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}
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static void print (void)
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{
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off_t offset;
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{
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setpwent ();
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while ((pwent = getpwent ())) {
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user = pwent->pw_uid;
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if (uflg &&
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((umin != -1 && user < umin) ||
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(umax != -1 && user > umax)))
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continue;
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offset = user * sizeof lastlog;
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fseeko (lastlogfile, offset, SEEK_SET);
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if (fread ((char *) &lastlog, sizeof lastlog, 1,
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lastlogfile) != 1)
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continue;
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if (tflg && NOW - lastlog.ll_time > seconds)
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continue;
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if (bflg && NOW - lastlog.ll_time < inverse_seconds)
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continue;
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print_one (pwent);
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}
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}
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}
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int main (int argc, char **argv)
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{
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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{
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int c;
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static struct option const longopts[] = {
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{"help", no_argument, NULL, 'h'},
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{"time", required_argument, NULL, 't'},
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{"before", required_argument, NULL, 'b'},
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{"user", required_argument, NULL, 'u'},
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{NULL, 0, NULL, '\0'}
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};
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while ((c =
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getopt_long (argc, argv, "ht:b:u:", longopts,
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NULL)) != -1) {
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switch (c) {
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case 'h':
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usage ();
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break;
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case 't':
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days = atoi (optarg);
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seconds = days * DAY;
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tflg++;
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break;
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case 'b':
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inverse_days = atoi (optarg);
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inverse_seconds = inverse_days * DAY;
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bflg++;
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break;
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case 'u':
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/*
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* The user can be:
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* - a login name
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* - numerical
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* - a numerical login ID
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* - a range (-x, x-, x-y)
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*/
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uflg++;
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pwent = xgetpwnam (optarg);
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if (NULL != pwent) {
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umin = pwent->pw_uid;
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umax = umin;
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} else {
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char *endptr = NULL;
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user = strtol(optarg, &endptr, 10);
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if (*optarg != '\0' && *endptr == '\0') {
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if (user < 0) {
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/* -<userid> */
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umin = -1;
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umax = -user;
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} else {
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/* <userid> */
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umin = user;
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umax = user;
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}
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} else if (endptr[0] == '-' && endptr[1] == '\0') {
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/* <userid>- */
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umin = user;
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umax = -1;
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} else if (*endptr == '-') {
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/* <userid>-<userid> */
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umin = user;
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umax = atol(endptr+1);
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} else {
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fprintf (stderr,
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_("Unknown user or range: %s\n"),
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optarg);
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exit (1);
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}
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}
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break;
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default:
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usage ();
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break;
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}
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}
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if (argc > optind) {
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fprintf (stderr,
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_("lastlog: unexpected argument: %s\n"),
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argv[optind]);
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usage();
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}
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}
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if ((lastlogfile = fopen (LASTLOG_FILE, "r")) == (FILE *) 0) {
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perror (LASTLOG_FILE);
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exit (1);
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}
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print ();
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fclose (lastlogfile);
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exit (0);
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}
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