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- /*
- * Copyright 1989, 1990, 1992, John F. Haugh II
- * All rights reserved.
- *
- * Permission is granted to copy and create derivative works for any
- * non-commercial purpose, provided this copyright notice is preserved
- * in all copies of source code, or included in human readable form
- * and conspicuously displayed on all copies of object code or
- * distribution media.
- *
- * Modified from faillog.c by Philip Street
- * Installation: Maine National Guard
- */
-
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <stdio.h>
- #include "pwd.h"
- #include <time.h>
- #ifndef BSD
- #include <string.h>
- #include <memory.h>
- #else
- #include <strings.h>
- #define strchr index
- #define strrchr rindex
- #endif
-
- #define LASTFILE "/usr/adm/lastlog"
-
- #include "config.h"
- #include "lastlog.h"
-
- #ifndef lint
- static char sccsid[] = "@(#)lastlog.c 3.2 10:30:33 18 Jul 1993";
- #endif
-
- FILE *lastlogfile; /* lastlog file stream */
- off_t user; /* one single user, specified on command line */
- int days; /* number of days to consider for print command */
- time_t seconds; /* that number of days in seconds */
-
- int uflg; /* set if user is a valid user id */
- int tflg; /* print is restricted to most recent days */
- struct lastlog lastlog; /* scratch structure to play with ... */
- struct stat statbuf; /* fstat buffer for file size */
-
- int freadcode;
-
- extern int optind;
- extern char *optarg;
- extern char *asctime ();
- extern struct passwd *getpwuid ();
- extern struct passwd *getpwnam ();
- extern struct passwd *getpwent ();
- extern struct tm *localtime ();
-
- #define DAY (24L*3600L)
- #define NOW (time ((time_t *) 0))
-
- main (argc, argv)
- int argc;
- char **argv;
- {
- int c;
- struct passwd *pwent;
-
- if ((lastlogfile = fopen (LASTFILE,"r")) == (FILE *) 0) {
- perror (LASTFILE);
- exit (1);
- }
- while ((c = getopt (argc, argv, "u:t:")) != EOF) {
- switch (c) {
- case 'u':
- pwent = getpwnam (optarg);
- if (! pwent) {
- fprintf (stderr, "Unknown User: %s\n", optarg);
- exit (1);
- }
- uflg++;
- user = pwent->pw_uid;
- break;
- case 't':
- days = atoi (optarg);
- seconds = days * DAY;
- tflg++;
- break;
- }
- }
- print ();
- fclose (lastlogfile);
- exit (0);
- /*NOTREACHED*/
- }
-
- print ()
- {
- int uid;
- off_t offset;
-
- if (uflg) {
- offset = user * sizeof lastlog;
- fstat (fileno (lastlogfile), &statbuf);
- if (offset >= statbuf.st_size)
- return;
-
- fseek (lastlogfile, (off_t) user * sizeof lastlog, 0);
- if (fread ((char *) &lastlog, sizeof lastlog, 1, lastlogfile) == 1)
- print_one (user);
- else
- perror (LASTFILE);
- } else {
- for (uid = 0;
- fread ((char *) &lastlog, sizeof lastlog, 1, lastlogfile) == 1;
- uid++) {
-
- if (tflg && NOW - lastlog.ll_time > seconds)
- continue;
-
- print_one (uid);
- }
- }
- }
-
- print_one (uid)
- int uid;
- {
- static int once;
- char *cp;
- struct tm *tm;
- struct passwd *pwent;
-
- if (! once) {
- printf ("Username\t\tPort\tLatest\n");
- once++;
- }
- pwent = getpwuid (uid);
- tm = localtime (&lastlog.ll_time);
- cp = asctime (tm);
- cp[24] = '\0';
-
- if(lastlog.ll_time == (time_t) 0)
- cp = "**Never logged in**\0";
-
- if (pwent) {
- printf ("%-16s\t%s\t%s\n",pwent->pw_name,lastlog.ll_line,cp);
- }
- }
-