2 * Copyright (c) 1987, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char copyright[] =
32 "@(#) Copyright (c) 1987, 1993, 1994\n\
33 The Regents of the University of California. All rights reserved.\n";
37 static const char sccsid[] = "@(#)last.c 8.2 (Berkeley) 4/2/94";
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/param.h>
59 #include <sys/queue.h>
61 #define NO 0 /* false/no */
62 #define YES 1 /* true/yes */
63 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
66 char *name; /* argument */
70 int type; /* type of arg */
71 struct arg *next; /* linked list pointer */
73 ARG *arglist; /* head of linked list */
75 LIST_HEAD(idlisthead, idtab) idlist;
78 time_t logout; /* log out time */
79 char id[sizeof ((struct utmpx *)0)->ut_id]; /* identifier */
80 LIST_ENTRY(idtab) list;
83 static const char *crmsg; /* cause of last reboot */
84 static time_t currentout; /* current logout value */
85 static long maxrec; /* records to display */
86 static const char *file = NULL; /* wtmp file */
87 static int sflag = 0; /* show delta in seconds */
88 static int width = 5; /* show seconds in delta */
89 static int yflag; /* show year */
91 static int snapfound = 0; /* found snapshot entry? */
92 static time_t snaptime; /* if != 0, we will only
93 * report users logged in
94 * at this snapshot time
97 void addarg(int, char *);
98 time_t dateconv(char *);
99 void doentry(struct utmpx *);
100 void hostconv(char *);
101 void printentry(struct utmpx *, struct idtab *);
102 char *ttyconv(char *);
103 int want(struct utmpx *);
110 (void)fprintf(stderr,
111 "usage: last [-swy] [-d [[CC]YY][MMDD]hhmm[.SS]] [-f file] [-h host]\n"
112 " [-n maxrec] [-t tty] [user ...]\n");
117 main(int argc, char *argv[])
122 (void) setlocale(LC_TIME, "");
123 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
127 while ((ch = getopt(argc, argv, "0123456789d:f:h:n:st:wy")) != -1)
129 case '0': case '1': case '2': case '3': case '4':
130 case '5': case '6': case '7': case '8': case '9':
132 * kludge: last was originally designed to take
133 * a number after a dash.
136 p = strchr(argv[optind - 1], ch);
138 p = strchr(argv[optind], ch);
145 snaptime = dateconv(optarg);
152 addarg(HOST_TYPE, optarg);
156 maxrec = strtol(optarg, &p, 10);
157 if (p == optarg || *p != '\0' || errno != 0 ||
159 errx(1, "%s: bad line count", optarg);
162 sflag++; /* Show delta as seconds */
165 addarg(TTY_TYPE, ttyconv(optarg));
178 if (sflag && width == 8) usage();
182 for (argv += optind; *argv; ++argv) {
183 #define COMPATIBILITY
185 /* code to allow "last p5" to work */
186 addarg(TTY_TYPE, ttyconv(*argv));
188 addarg(USER_TYPE, *argv);
197 * read through the wtmp file
202 struct utmpx *buf = NULL;
204 static unsigned int amount = 0;
212 /* Load the last entries from the file. */
213 if (setutxdb(UTXDB_LOG, file) != 0)
215 while ((ut = getutxent()) != NULL) {
216 if (amount % 128 == 0) {
217 buf = realloc(buf, (amount + 128) * sizeof *ut);
221 memcpy(&buf[amount++], ut, sizeof *ut);
222 if (t > ut->ut_tv.tv_sec)
223 t = ut->ut_tv.tv_sec;
227 /* Display them in reverse order. */
229 doentry(&buf[--amount]);
232 (void) strftime(ct, sizeof(ct), "\nwtmp begins %+\n", tm);
238 * process a single wtmp entry
241 doentry(struct utmpx *bp)
243 struct idtab *tt, *ttx; /* idlist entry */
245 /* the machine stopped */
246 if (bp->ut_type == BOOT_TIME || bp->ut_type == SHUTDOWN_TIME) {
247 /* everybody just logged out */
248 for (tt = LIST_FIRST(&idlist); tt;) {
249 LIST_REMOVE(tt, list);
251 tt = LIST_NEXT(tt, list);
254 currentout = -bp->ut_tv.tv_sec;
255 crmsg = bp->ut_type != SHUTDOWN_TIME ?
256 "crash" : "shutdown";
258 * if we're in snapshot mode, we want to exit if this
259 * shutdown/reboot appears while we we are tracking the
262 if (snaptime && snapfound)
265 * don't print shutdown/reboot entries unless flagged for
267 if (!snaptime && want(bp))
268 printentry(bp, NULL);
272 if (bp->ut_type == OLD_TIME || bp->ut_type == NEW_TIME) {
273 if (want(bp) && !snaptime)
274 printentry(bp, NULL);
278 if (bp->ut_type != USER_PROCESS && bp->ut_type != DEAD_PROCESS)
281 /* find associated identifier */
282 LIST_FOREACH(tt, &idlist, list)
283 if (!memcmp(tt->id, bp->ut_id, sizeof bp->ut_id))
288 tt = malloc(sizeof(struct idtab));
290 errx(1, "malloc failure");
291 tt->logout = currentout;
292 memcpy(tt->id, bp->ut_id, sizeof bp->ut_id);
293 LIST_INSERT_HEAD(&idlist, tt, list);
297 * print record if not in snapshot mode and wanted
298 * or in snapshot mode and in snapshot range
300 if (bp->ut_type == USER_PROCESS && (want(bp) ||
301 (bp->ut_tv.tv_sec < snaptime &&
302 (tt->logout > snaptime || tt->logout < 1)))) {
306 tt->logout = bp->ut_tv.tv_sec;
313 * If `tt' is non-NULL, use it and `crmsg' to print the logout time or
314 * logout type (crash/shutdown) as appropriate.
317 printentry(struct utmpx *bp, struct idtab *tt)
321 time_t delta; /* time difference */
324 if (maxrec != -1 && !maxrec--)
326 t = bp->ut_tv.tv_sec;
328 (void) strftime(ct, sizeof(ct), d_first ?
329 (yflag ? "%a %e %b %Y %R" : "%a %e %b %R") :
330 (yflag ? "%a %b %e %Y %R" : "%a %b %e %R"), tm);
331 switch (bp->ut_type) {
333 printf("%-42s", "boot time");
336 printf("%-42s", "shutdown time");
339 printf("%-42s", "old time");
342 printf("%-42s", "new time");
345 printf("%-10s %-8s %-22.22s",
346 bp->ut_user, bp->ut_line, bp->ut_host);
349 printf(" %s%c", ct, tt == NULL ? '\n' : ' ');
353 puts(" still logged in");
356 if (tt->logout < 0) {
357 tt->logout = -tt->logout;
358 printf("- %s", crmsg);
360 tm = localtime(&tt->logout);
361 (void) strftime(ct, sizeof(ct), "%R", tm);
364 delta = tt->logout - bp->ut_tv.tv_sec;
366 printf(" (%8ld)\n", (long)delta);
369 (void) strftime(ct, sizeof(ct), width >= 8 ? "%T" : "%R", tm);
371 printf(" (%s)\n", ct);
373 printf(" (%ld+%s)\n", (long)delta / 86400, ct);
379 * see if want this entry
382 want(struct utmpx *bp)
392 for (step = arglist; step; step = step->next)
395 if (!strcasecmp(step->name, bp->ut_host))
399 if (!strcmp(step->name, bp->ut_line))
403 if (!strcmp(step->name, bp->ut_user))
412 * add an entry to a linked list of arguments
415 addarg(int type, char *arg)
419 if ((cur = malloc(sizeof(ARG))) == NULL)
420 errx(1, "malloc failure");
429 * convert the hostname to search pattern; if the supplied host name
430 * has a domain attached that is the same as the current domain, rip
431 * off the domain suffix since that's what login(1) does.
436 static int first = 1;
437 static char *hostdot, name[MAXHOSTNAMELEN];
440 if (!(argdot = strchr(arg, '.')))
444 if (gethostname(name, sizeof(name)))
445 err(1, "gethostname");
446 hostdot = strchr(name, '.');
448 if (hostdot && !strcasecmp(hostdot, argdot))
454 * convert tty to correct name.
462 * kludge -- we assume that all tty's end with
463 * a two character suffix.
465 if (strlen(arg) == 2) {
466 /* either 6 for "ttyxx" or 8 for "console" */
467 if ((mval = malloc(8)) == NULL)
468 errx(1, "malloc failure");
469 if (!strcmp(arg, "co"))
470 (void)strcpy(mval, "console");
472 (void)strcpy(mval, "tty");
473 (void)strcpy(mval + 3, arg);
477 if (!strncmp(arg, _PATH_DEV, sizeof(_PATH_DEV) - 1))
484 * Convert the snapshot time in command line given in the format
485 * [[CC]YY]MMDDhhmm[.SS]] to a time_t.
486 * Derived from atime_arg1() in usr.bin/touch/touch.c
496 /* Start with the current time. */
497 if (time(&timet) < 0)
499 if ((t = localtime(&timet)) == NULL)
502 /* [[CC]YY]MMDDhhmm[.SS] */
503 if ((p = strchr(arg, '.')) == NULL)
504 t->tm_sec = 0; /* Seconds defaults to 0. */
506 if (strlen(p + 1) != 2)
509 t->tm_sec = ATOI2(p);
513 switch (strlen(arg)) {
514 case 12: /* CCYYMMDDhhmm */
515 t->tm_year = ATOI2(arg);
519 case 10: /* YYMMDDhhmm */
521 yearset = ATOI2(arg);
522 t->tm_year += yearset;
524 yearset = ATOI2(arg);
526 t->tm_year = yearset + 2000;
528 t->tm_year = yearset + 1900;
530 t->tm_year -= 1900; /* Convert to UNIX time. */
532 case 8: /* MMDDhhmm */
533 t->tm_mon = ATOI2(arg);
534 --t->tm_mon; /* Convert from 01-12 to 00-11 */
535 t->tm_mday = ATOI2(arg);
536 t->tm_hour = ATOI2(arg);
537 t->tm_min = ATOI2(arg);
540 t->tm_hour = ATOI2(arg);
541 t->tm_min = ATOI2(arg);
546 t->tm_isdst = -1; /* Figure out DST. */
550 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");