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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * $FreeBSD: src/usr.bin/last/last.c,v 1.10.6.11 2002/11/02 23:00:26 mux Exp $
37 static const char copyright[] =
38 "@(#) Copyright (c) 1987, 1993, 1994\n\
39 The Regents of the University of California. All rights reserved.\n";
43 static const char sccsid[] = "@(#)last.c 8.2 (Berkeley) 4/2/94";
46 #include <sys/param.h>
61 #include <sys/queue.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;
67 static struct utmp buf[1024]; /* utmp read buffer */
70 char *name; /* argument */
74 int type; /* type of arg */
75 struct arg *next; /* linked list pointer */
77 ARG *arglist; /* head of linked list */
79 LIST_HEAD(ttylisthead, ttytab) ttylist;
82 time_t logout; /* log out time */
83 char tty[UT_LINESIZE + 1]; /* terminal name */
84 LIST_ENTRY(ttytab) list;
87 static const char *crmsg; /* cause of last reboot */
88 static long currentout, /* current logout value */
89 maxrec; /* records to display */
90 static const char *file = _PATH_WTMP; /* wtmp file */
91 static int sflag = 0; /* show delta in seconds */
92 static int width = 5; /* show seconds in delta */
93 static int yflag; /* show year */
95 static int snapfound = 0; /* found snapshot entry? */
96 static time_t snaptime; /* if != 0, we will only
97 * report users logged in
98 * at this snapshot time
101 int main __P((int, char *[]));
102 void addarg __P((int, char *));
103 time_t dateconv __P((char *));
104 void doentry __P((struct utmp *));
105 void hostconv __P((char *));
106 void onintr __P((int));
107 void printentry __P((struct utmp *, struct ttytab *));
108 char *ttyconv __P((char *));
109 char *ttyconv __P((char *));
110 int want __P((struct utmp *));
111 void usage __P((void));
112 void wtmp __P((void));
117 (void)fprintf(stderr,
118 "usage: last [-#] [-y] [-d [[CC]YY][MMDD]hhmm[.SS]] [-f file] [-h host]\n"
119 "\t[-t tty] [-s|w] [user ...]\n");
131 (void) setlocale(LC_TIME, "");
132 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
136 while ((ch = getopt(argc, argv, "0123456789d:f:h:st:wy")) != -1)
138 case '0': case '1': case '2': case '3': case '4':
139 case '5': case '6': case '7': case '8': case '9':
141 * kludge: last was originally designed to take
142 * a number after a dash.
145 p = strchr(argv[optind - 1], ch);
147 p = strchr(argv[optind], ch);
154 snaptime = dateconv(optarg);
161 addarg(HOST_TYPE, optarg);
164 sflag++; /* Show delta as seconds */
167 addarg(TTY_TYPE, ttyconv(optarg));
180 if (sflag && width == 8) usage();
184 for (argv += optind; *argv; ++argv) {
185 #define COMPATIBILITY
187 /* code to allow "last p5" to work */
188 addarg(TTY_TYPE, ttyconv(*argv));
190 addarg(USER_TYPE, *argv);
199 * read through the wtmp file
204 struct utmp *bp; /* current structure */
205 struct stat stb; /* stat of file for size */
213 if ((wfd = open(file, O_RDONLY, 0)) < 0 || fstat(wfd, &stb) == -1)
215 bl = (stb.st_size + sizeof(buf) - 1) / sizeof(buf);
217 (void)time(&buf[0].ut_time);
218 (void)signal(SIGINT, onintr);
219 (void)signal(SIGQUIT, onintr);
222 if (lseek(wfd, (off_t)(bl * sizeof(buf)), L_SET) == -1 ||
223 (bytes = read(wfd, buf, sizeof(buf))) == -1)
225 for (bp = &buf[bytes / sizeof(buf[0]) - 1]; bp >= buf; --bp)
228 tm = localtime(&buf[0].ut_time);
229 (void) strftime(ct, sizeof(ct), "\nwtmp begins %+\n", tm);
235 * process a single wtmp entry
241 struct ttytab *tt, *ttx; /* ttylist entry */
244 * if the terminal line is '~', the machine stopped.
245 * see utmp(5) for more info.
247 if (bp->ut_line[0] == '~' && !bp->ut_line[1]) {
248 /* everybody just logged out */
249 for (tt = LIST_FIRST(&ttylist); tt;) {
250 LIST_REMOVE(tt, list);
252 tt = LIST_NEXT(tt, list);
255 currentout = -bp->ut_time;
256 crmsg = strncmp(bp->ut_name, "shutdown", UT_NAMESIZE) ?
257 "crash" : "shutdown";
259 * if we're in snapshot mode, we want to exit if this
260 * shutdown/reboot appears while we we are tracking the
263 if (snaptime && snapfound)
266 * don't print shutdown/reboot entries unless flagged for
268 if (!snaptime && want(bp))
269 printentry(bp, NULL);
273 * if the line is '{' or '|', date got set; see
274 * utmp(5) for more info.
276 if ((bp->ut_line[0] == '{' || bp->ut_line[0] == '|') &&
278 if (want(bp) && !snaptime)
279 printentry(bp, NULL);
282 /* find associated tty */
283 LIST_FOREACH(tt, &ttylist, list)
284 if (!strncmp(tt->tty, bp->ut_line, UT_LINESIZE))
289 tt = malloc(sizeof(struct ttytab));
291 err(1, "malloc failure");
292 tt->logout = currentout;
293 strncpy(tt->tty, bp->ut_line, UT_LINESIZE);
294 LIST_INSERT_HEAD(&ttylist, tt, list);
298 * print record if not in snapshot mode and wanted
299 * or in snapshot mode and in snapshot range
301 if (bp->ut_name[0] && (want(bp) || (bp->ut_time < snaptime &&
302 (tt->logout > snaptime || tt->logout < 1)))) {
305 * when uucp and ftp log in over a network, the entry in
306 * the utmp file is the name plus their process id. See
307 * etc/ftpd.c and usr.bin/uucp/uucpd.c for more information.
309 if (!strncmp(bp->ut_line, "ftp", sizeof("ftp") - 1))
310 bp->ut_line[3] = '\0';
311 else if (!strncmp(bp->ut_line, "uucp", sizeof("uucp") - 1))
312 bp->ut_line[4] = '\0';
315 tt->logout = bp->ut_time;
322 * If `tt' is non-NULL, use it and `crmsg' to print the logout time or
323 * logout type (crash/shutdown) as appropriate.
332 time_t delta; /* time difference */
334 if (maxrec != -1 && !maxrec--)
336 tm = localtime(&bp->ut_time);
337 (void) strftime(ct, sizeof(ct), d_first ?
338 (yflag ? "%a %e %b %Y %R" : "%a %e %b %R") :
339 (yflag ? "%a %b %e %Y %R" : "%a %b %e %R"), tm);
340 printf("%-*.*s %-*.*s %-*.*s %s%c",
341 UT_NAMESIZE, UT_NAMESIZE, bp->ut_name,
342 UT_LINESIZE, UT_LINESIZE, bp->ut_line,
343 UT_HOSTSIZE, UT_HOSTSIZE, bp->ut_host,
344 ct, tt == NULL ? '\n' : ' ');
348 puts(" still logged in");
351 if (tt->logout < 0) {
352 tt->logout = -tt->logout;
353 printf("- %s", crmsg);
355 tm = localtime(&tt->logout);
356 (void) strftime(ct, sizeof(ct), "%R", tm);
359 delta = tt->logout - bp->ut_time;
361 printf(" (%8ld)\n", (long)delta);
364 (void) strftime(ct, sizeof(ct), width >= 8 ? "%T" : "%R", tm);
366 printf(" (%s)\n", ct);
368 printf(" (%ld+%s)\n", (long)delta / 86400, ct);
374 * see if want this entry
388 for (step = arglist; step; step = step->next)
391 if (!strncasecmp(step->name, bp->ut_host, UT_HOSTSIZE))
395 if (!strncmp(step->name, bp->ut_line, UT_LINESIZE))
399 if (!strncmp(step->name, bp->ut_name, UT_NAMESIZE))
408 * add an entry to a linked list of arguments
417 if (!(cur = (ARG *)malloc((u_int)sizeof(ARG))))
418 err(1, "malloc failure");
427 * convert the hostname to search pattern; if the supplied host name
428 * has a domain attached that is the same as the current domain, rip
429 * off the domain suffix since that's what login(1) does.
435 static int first = 1;
436 static char *hostdot, name[MAXHOSTNAMELEN];
439 if (!(argdot = strchr(arg, '.')))
443 if (gethostname(name, sizeof(name)))
444 err(1, "gethostname");
445 hostdot = strchr(name, '.');
447 if (hostdot && !strcasecmp(hostdot, argdot))
453 * 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((u_int)8)))
468 err(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
497 /* Start with the current time. */
498 if (time(&timet) < 0)
500 if ((t = localtime(&timet)) == NULL)
503 /* [[CC]YY]MMDDhhmm[.SS] */
504 if ((p = strchr(arg, '.')) == NULL)
505 t->tm_sec = 0; /* Seconds defaults to 0. */
507 if (strlen(p + 1) != 2)
510 t->tm_sec = ATOI2(p);
514 switch (strlen(arg)) {
515 case 12: /* CCYYMMDDhhmm */
516 t->tm_year = ATOI2(arg);
520 case 10: /* YYMMDDhhmm */
522 yearset = ATOI2(arg);
523 t->tm_year += yearset;
525 yearset = ATOI2(arg);
527 t->tm_year = yearset + 2000;
529 t->tm_year = yearset + 1900;
531 t->tm_year -= 1900; /* Convert to UNIX time. */
533 case 8: /* MMDDhhmm */
534 t->tm_mon = ATOI2(arg);
535 --t->tm_mon; /* Convert from 01-12 to 00-11 */
536 t->tm_mday = ATOI2(arg);
537 t->tm_hour = ATOI2(arg);
538 t->tm_min = ATOI2(arg);
541 t->tm_hour = ATOI2(arg);
542 t->tm_min = ATOI2(arg);
547 t->tm_isdst = -1; /* Figure out DST. */
551 "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
558 * on interrupt, we inform the user how far we've gotten
567 tm = localtime(&buf[0].ut_time);
568 (void) strftime(ct, sizeof(ct),
569 d_first ? "%a %e %b %R" : "%a %b %e %R",
571 printf("\ninterrupted %s\n", ct);
574 (void)fflush(stdout); /* fix required for rsh */