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 * 3. 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>
43 #include <sys/capsicum.h>
44 #include <sys/queue.h>
47 #include <capsicum_helpers.h>
63 #define NO 0 /* false/no */
64 #define YES 1 /* true/yes */
65 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
68 char *name; /* argument */
69 #define REBOOT_TYPE -1
73 int type; /* type of arg */
74 struct arg *next; /* linked list pointer */
76 static ARG *arglist; /* head of linked list */
78 static SLIST_HEAD(, idtab) idlist;
81 time_t logout; /* log out time */
82 char id[sizeof ((struct utmpx *)0)->ut_id]; /* identifier */
83 SLIST_ENTRY(idtab) list;
86 static const char *crmsg; /* cause of last reboot */
87 static time_t currentout; /* current logout value */
88 static long maxrec; /* records to display */
89 static const char *file = NULL; /* utx.log file */
90 static int sflag = 0; /* show delta in seconds */
91 static int width = 5; /* show seconds in delta */
92 static int yflag; /* show year */
94 static int snapfound = 0; /* found snapshot entry? */
95 static time_t snaptime; /* if != 0, we will only
96 * report users logged in
97 * at this snapshot time
100 static void addarg(int, char *);
101 static time_t dateconv(char *);
102 static void doentry(struct utmpx *);
103 static void hostconv(char *);
104 static void printentry(struct utmpx *, struct idtab *);
105 static char *ttyconv(char *);
106 static int want(struct utmpx *);
107 static void usage(void);
108 static void wtmp(void);
113 (void)fprintf(stderr,
114 "usage: last [-swy] [-d [[CC]YY][MMDD]hhmm[.SS]] [-f file] [-h host]\n"
115 " [-n maxrec] [-t tty] [user ...]\n");
120 main(int argc, char *argv[])
125 (void) setlocale(LC_TIME, "");
126 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
130 while ((ch = getopt(argc, argv, "0123456789d:f:h:n:st:wy")) != -1)
132 case '0': case '1': case '2': case '3': case '4':
133 case '5': case '6': case '7': case '8': case '9':
135 * kludge: last was originally designed to take
136 * a number after a dash.
139 p = strchr(argv[optind - 1], ch);
141 p = strchr(argv[optind], ch);
148 snaptime = dateconv(optarg);
155 addarg(HOST_TYPE, optarg);
159 maxrec = strtol(optarg, &p, 10);
160 if (p == optarg || *p != '\0' || errno != 0 ||
162 errx(1, "%s: bad line count", optarg);
165 sflag++; /* Show delta as seconds */
168 addarg(TTY_TYPE, ttyconv(optarg));
181 if (caph_limit_stdio() < 0)
182 err(1, "can't limit stdio rights");
184 caph_cache_catpages();
187 /* Cache UTX database. */
188 if (setutxdb(UTXDB_LOG, file) != 0)
189 err(1, "%s", file != NULL ? file : "(default utx db)");
191 if (cap_enter() < 0 && errno != ENOSYS)
194 if (sflag && width == 8) usage();
198 for (argv += optind; *argv; ++argv) {
199 if (strcmp(*argv, "reboot") == 0)
200 addarg(REBOOT_TYPE, *argv);
201 #define COMPATIBILITY
203 /* code to allow "last p5" to work */
204 addarg(TTY_TYPE, ttyconv(*argv));
206 addarg(USER_TYPE, *argv);
215 * read through the utx.log file
220 struct utmpx *buf = NULL;
222 static unsigned int amount = 0;
230 /* Load the last entries from the file. */
231 while ((ut = getutxent()) != NULL) {
232 if (amount % 128 == 0) {
233 buf = realloc(buf, (amount + 128) * sizeof *ut);
237 memcpy(&buf[amount++], ut, sizeof *ut);
238 if (t > ut->ut_tv.tv_sec)
239 t = ut->ut_tv.tv_sec;
243 /* Display them in reverse order. */
245 doentry(&buf[--amount]);
248 (void) strftime(ct, sizeof(ct), "%+", tm);
249 printf("\n%s begins %s\n", ((file == NULL) ? "utx.log" : file), ct);
254 * process a single utx.log entry
257 doentry(struct utmpx *bp)
261 /* the machine stopped */
262 if (bp->ut_type == BOOT_TIME || bp->ut_type == SHUTDOWN_TIME) {
263 /* everybody just logged out */
264 while ((tt = SLIST_FIRST(&idlist)) != NULL) {
265 SLIST_REMOVE_HEAD(&idlist, list);
268 currentout = -bp->ut_tv.tv_sec;
269 crmsg = bp->ut_type != SHUTDOWN_TIME ?
270 "crash" : "shutdown";
272 * if we're in snapshot mode, we want to exit if this
273 * shutdown/reboot appears while we we are tracking the
276 if (snaptime && snapfound)
279 * don't print shutdown/reboot entries unless flagged for
281 if (!snaptime && want(bp))
282 printentry(bp, NULL);
286 if (bp->ut_type == OLD_TIME || bp->ut_type == NEW_TIME) {
287 if (want(bp) && !snaptime)
288 printentry(bp, NULL);
292 if (bp->ut_type != USER_PROCESS && bp->ut_type != DEAD_PROCESS)
295 /* find associated identifier */
296 SLIST_FOREACH(tt, &idlist, list)
297 if (!memcmp(tt->id, bp->ut_id, sizeof bp->ut_id))
302 tt = malloc(sizeof(struct idtab));
304 errx(1, "malloc failure");
305 tt->logout = currentout;
306 memcpy(tt->id, bp->ut_id, sizeof bp->ut_id);
307 SLIST_INSERT_HEAD(&idlist, tt, list);
311 * print record if not in snapshot mode and wanted
312 * or in snapshot mode and in snapshot range
314 if (bp->ut_type == USER_PROCESS && (want(bp) ||
315 (bp->ut_tv.tv_sec < snaptime &&
316 (tt->logout > snaptime || tt->logout < 1)))) {
320 tt->logout = bp->ut_tv.tv_sec;
327 * If `tt' is non-NULL, use it and `crmsg' to print the logout time or
328 * logout type (crash/shutdown) as appropriate.
331 printentry(struct utmpx *bp, struct idtab *tt)
335 time_t delta; /* time difference */
338 if (maxrec != -1 && !maxrec--)
340 t = bp->ut_tv.tv_sec;
342 (void) strftime(ct, sizeof(ct), d_first ?
343 (yflag ? "%a %e %b %Y %R" : "%a %e %b %R") :
344 (yflag ? "%a %b %e %Y %R" : "%a %b %e %R"), tm);
345 switch (bp->ut_type) {
347 printf("%-42s", "boot time");
350 printf("%-42s", "shutdown time");
353 printf("%-42s", "old time");
356 printf("%-42s", "new time");
359 printf("%-10s %-8s %-22.22s",
360 bp->ut_user, bp->ut_line, bp->ut_host);
363 printf(" %s%c", ct, tt == NULL ? '\n' : ' ');
367 puts(" still logged in");
370 if (tt->logout < 0) {
371 tt->logout = -tt->logout;
372 printf("- %s", crmsg);
374 tm = localtime(&tt->logout);
375 (void) strftime(ct, sizeof(ct), "%R", tm);
378 delta = tt->logout - bp->ut_tv.tv_sec;
380 printf(" (%8ld)\n", (long)delta);
383 (void) strftime(ct, sizeof(ct), width >= 8 ? "%T" : "%R", tm);
385 printf(" (%s)\n", ct);
387 printf(" (%ld+%s)\n", (long)delta / 86400, ct);
393 * see if want this entry
396 want(struct utmpx *bp)
406 for (step = arglist; step; step = step->next)
409 if (bp->ut_type == BOOT_TIME ||
410 bp->ut_type == SHUTDOWN_TIME)
414 if (!strcasecmp(step->name, bp->ut_host))
418 if (!strcmp(step->name, bp->ut_line))
422 if (!strcmp(step->name, bp->ut_user))
431 * add an entry to a linked list of arguments
434 addarg(int type, char *arg)
438 if ((cur = malloc(sizeof(ARG))) == NULL)
439 errx(1, "malloc failure");
448 * convert the hostname to search pattern; if the supplied host name
449 * has a domain attached that is the same as the current domain, rip
450 * off the domain suffix since that's what login(1) does.
455 static int first = 1;
456 static char *hostdot, name[MAXHOSTNAMELEN];
459 if (!(argdot = strchr(arg, '.')))
463 if (gethostname(name, sizeof(name)))
464 err(1, "gethostname");
465 hostdot = strchr(name, '.');
467 if (hostdot && !strcasecmp(hostdot, argdot))
473 * convert tty to correct name.
481 * kludge -- we assume that all tty's end with
482 * a two character suffix.
484 if (strlen(arg) == 2) {
485 /* either 6 for "ttyxx" or 8 for "console" */
486 if ((mval = malloc(8)) == NULL)
487 errx(1, "malloc failure");
488 if (!strcmp(arg, "co"))
489 (void)strcpy(mval, "console");
491 (void)strcpy(mval, "tty");
492 (void)strcpy(mval + 3, arg);
496 if (!strncmp(arg, _PATH_DEV, sizeof(_PATH_DEV) - 1))
503 * Convert the snapshot time in command line given in the format
504 * [[CC]YY]MMDDhhmm[.SS]] to a time_t.
505 * Derived from atime_arg1() in usr.bin/touch/touch.c
515 /* Start with the current time. */
516 if (time(&timet) < 0)
518 if ((t = localtime(&timet)) == NULL)
521 /* [[CC]YY]MMDDhhmm[.SS] */
522 if ((p = strchr(arg, '.')) == NULL)
523 t->tm_sec = 0; /* Seconds defaults to 0. */
525 if (strlen(p + 1) != 2)
528 t->tm_sec = ATOI2(p);
532 switch (strlen(arg)) {
533 case 12: /* CCYYMMDDhhmm */
534 t->tm_year = ATOI2(arg);
538 case 10: /* YYMMDDhhmm */
540 yearset = ATOI2(arg);
541 t->tm_year += yearset;
543 yearset = ATOI2(arg);
545 t->tm_year = yearset + 2000;
547 t->tm_year = yearset + 1900;
549 t->tm_year -= 1900; /* Convert to UNIX time. */
551 case 8: /* MMDDhhmm */
552 t->tm_mon = ATOI2(arg);
553 --t->tm_mon; /* Convert from 01-12 to 00-11 */
554 t->tm_mday = ATOI2(arg);
555 t->tm_hour = ATOI2(arg);
556 t->tm_min = ATOI2(arg);
559 t->tm_hour = ATOI2(arg);
560 t->tm_min = ATOI2(arg);
565 t->tm_isdst = -1; /* Figure out DST. */
569 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");