133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 1996 John M. Vinopal
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed for the NetBSD Project
|
|
* by John M. Vinopal.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <sys/cdefs.h>
|
|
#ifndef lint
|
|
__RCSID("$FreeBSD$");
|
|
__RCSID("$NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $");
|
|
#endif
|
|
|
|
#include <err.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <utmp.h>
|
|
#include <unistd.h>
|
|
|
|
static const char *logfile = _PATH_LASTLOG;
|
|
|
|
int main __P((int, char **));
|
|
static void output __P((struct passwd *, struct lastlog *));
|
|
static void usage __P((void));
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int ch, i;
|
|
FILE *fp;
|
|
struct passwd *passwd;
|
|
struct lastlog last;
|
|
|
|
while ((ch = getopt(argc, argv, "")) != -1) {
|
|
usage();
|
|
}
|
|
|
|
fp = fopen(logfile, "r");
|
|
if (fp == NULL)
|
|
err(1, "%s", logfile);
|
|
|
|
setpassent(1); /* Keep passwd file pointers open */
|
|
|
|
/* Process usernames given on the command line. */
|
|
if (argc > 1) {
|
|
long offset;
|
|
for (i = 1; i < argc; ++i) {
|
|
if ((passwd = getpwnam(argv[i])) == NULL) {
|
|
warnx("user '%s' not found", argv[i]);
|
|
continue;
|
|
}
|
|
/* Calculate the offset into the lastlog file. */
|
|
offset = (long)(passwd->pw_uid * sizeof(last));
|
|
if (fseek(fp, offset, SEEK_SET)) {
|
|
warn("fseek error");
|
|
continue;
|
|
}
|
|
if (fread(&last, sizeof(last), 1, fp) != 1) {
|
|
warnx("fread error on '%s'", passwd->pw_name);
|
|
clearerr(fp);
|
|
continue;
|
|
}
|
|
output(passwd, &last);
|
|
}
|
|
}
|
|
/* Read all lastlog entries, looking for active ones */
|
|
else {
|
|
for (i = 0; fread(&last, sizeof(last), 1, fp) == 1; i++) {
|
|
if (last.ll_time == 0)
|
|
continue;
|
|
if ((passwd = getpwuid((uid_t)i)) != NULL)
|
|
output(passwd, &last);
|
|
}
|
|
if (ferror(fp))
|
|
warnx("fread error");
|
|
}
|
|
|
|
setpassent(0); /* Close passwd file pointers */
|
|
|
|
fclose(fp);
|
|
exit(0);
|
|
}
|
|
|
|
/* Duplicate the output of last(1) */
|
|
static void
|
|
output(p, l)
|
|
struct passwd *p;
|
|
struct lastlog *l;
|
|
{
|
|
time_t t = int_to_time(l->ll_time);
|
|
printf("%-*.*s %-*.*s %-*.*s %s",
|
|
UT_NAMESIZE, UT_NAMESIZE, p->pw_name,
|
|
UT_LINESIZE, UT_LINESIZE, l->ll_line,
|
|
UT_HOSTSIZE, UT_HOSTSIZE, l->ll_host,
|
|
(l->ll_time) ? ctime(&t) : "Never logged in\n");
|
|
}
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
fprintf(stderr, "usage: lastlogin [user ...]\n");
|
|
exit(1);
|
|
}
|