]>
Commit | Line | Data |
---|---|---|
6dbe3af9 | 1 | /* |
4d1d1233 | 2 | * last(1) from sysvinit project, merged into util-linux in Aug 2013. |
6dbe3af9 | 3 | * |
4d1d1233 KZ |
4 | * Copyright (C) 1991-2004 Miquel van Smoorenburg. |
5 | * Copyright (C) 2013 Ondrej Oprala <ooprala@redhat.com> | |
77079432 | 6 | * Karel Zak <kzak@redhat.com> |
6dbe3af9 | 7 | * |
4d1d1233 KZ |
8 | * Re-implementation of the 'last' command, this time for Linux. Yes I know |
9 | * there is BSD last, but I just felt like writing this. No thanks :-). Also, | |
10 | * this version gives lots more info (especially with -x) | |
ce602720 | 11 | * |
ce602720 | 12 | * |
4d1d1233 KZ |
13 | * This program is free software; you can redistribute it and/or modify |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
ba0c9030 | 17 | * |
4d1d1233 KZ |
18 | * This program is distributed in the hope that it will be useful, |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
ce602720 | 22 | * |
4d1d1233 KZ |
23 | * You should have received a copy of the GNU General Public License |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
ba0c9030 | 26 | */ |
7eda085c | 27 | #include <sys/types.h> |
ce602720 | 28 | #include <sys/stat.h> |
9d76c6fb | 29 | #include <fcntl.h> |
6dbe3af9 | 30 | #include <time.h> |
6dbe3af9 | 31 | #include <stdio.h> |
ce602720 | 32 | #include <ctype.h> |
b4b919fe | 33 | #include <utmpx.h> |
404fa3f9 | 34 | #include <pwd.h> |
6dbe3af9 KZ |
35 | #include <stdlib.h> |
36 | #include <unistd.h> | |
ce602720 OO |
37 | #include <string.h> |
38 | #include <signal.h> | |
39 | #include <getopt.h> | |
7eda085c | 40 | #include <netinet/in.h> |
ce602720 | 41 | #include <netdb.h> |
6dbe3af9 | 42 | #include <arpa/inet.h> |
c6ba16c6 | 43 | #include <libgen.h> |
7eda085c | 44 | |
293e0c90 KZ |
45 | #include "c.h" |
46 | #include "nls.h" | |
2ea747eb | 47 | #include "optutils.h" |
4c7dfea7 | 48 | #include "pathnames.h" |
a9f789e5 KZ |
49 | #include "xalloc.h" |
50 | #include "closestream.h" | |
2e58cd40 | 51 | #include "carefulputc.h" |
1bd68aab | 52 | #include "strutils.h" |
60f25dea | 53 | #include "timeutils.h" |
cd2876d2 | 54 | #include "monotonic.h" |
adcd2c32 | 55 | #include "fileutils.h" |
293e0c90 | 56 | |
2cdbf06f EV |
57 | #ifdef FUZZ_TARGET |
58 | #include "fuzz.h" | |
59 | #endif | |
60 | ||
ce602720 | 61 | #ifndef SHUTDOWN_TIME |
4d1d1233 | 62 | # define SHUTDOWN_TIME 254 |
6dbe3af9 | 63 | #endif |
ce602720 | 64 | |
83484375 SK |
65 | #ifndef LAST_LOGIN_LEN |
66 | # define LAST_LOGIN_LEN 8 | |
67 | #endif | |
68 | ||
69 | #ifndef LAST_DOMAIN_LEN | |
70 | # define LAST_DOMAIN_LEN 16 | |
71 | #endif | |
72 | ||
45f11b6b SK |
73 | #ifndef LAST_TIMESTAMP_LEN |
74 | # define LAST_TIMESTAMP_LEN 32 | |
75 | #endif | |
76 | ||
ce602720 OO |
77 | #define UCHUNKSIZE 16384 /* How much we read at once. */ |
78 | ||
83484375 | 79 | struct last_control { |
ee24e58f KZ |
80 | unsigned int lastb :1, /* Is this command 'lastb' */ |
81 | extended :1, /* Lots of info */ | |
82 | showhost :1, /* Show hostname */ | |
83 | altlist :1, /* Hostname at the end */ | |
84 | usedns :1, /* Use DNS to lookup the hostname */ | |
f16d5044 | 85 | useip :1; /* Print IP address in number format */ |
83484375 SK |
86 | |
87 | unsigned int name_len; /* Number of login name characters to print */ | |
88 | unsigned int domain_len; /* Number of domain name characters to print */ | |
89 | unsigned int maxrecs; /* Maximum number of records to list */ | |
90 | ||
91 | char **show; /* Match search list */ | |
92 | ||
0e5218ac | 93 | struct timeval boot_time; /* system boot time */ |
83484375 SK |
94 | time_t since; /* at what time to start displaying the file */ |
95 | time_t until; /* at what time to stop displaying the file */ | |
96 | time_t present; /* who where present at time_t */ | |
45f11b6b | 97 | unsigned int time_fmt; /* time format */ |
5d7df6b7 | 98 | char separator; /* output separator */ |
83484375 SK |
99 | }; |
100 | ||
ce602720 OO |
101 | /* Double linked list of struct utmp's */ |
102 | struct utmplist { | |
b4b919fe | 103 | struct utmpx ut; |
4d1d1233 KZ |
104 | struct utmplist *next; |
105 | struct utmplist *prev; | |
ce602720 | 106 | }; |
ce602720 OO |
107 | |
108 | /* Types of listing */ | |
e843d047 SK |
109 | enum { |
110 | R_CRASH = 1, /* No logout record, system boot in between */ | |
111 | R_DOWN, /* System brought down in decent way */ | |
112 | R_NORMAL, /* Normal */ | |
113 | R_NOW, /* Still logged in */ | |
114 | R_REBOOT, /* Reboot record. */ | |
9d0b73a6 | 115 | R_REBOOT_CRASH, /* Reboot record without matching shutdown */ |
e843d047 SK |
116 | R_PHANTOM, /* No logout record but session is stale. */ |
117 | R_TIMECHANGE /* NEW_TIME or OLD_TIME */ | |
118 | }; | |
ce602720 | 119 | |
45f11b6b SK |
120 | enum { |
121 | LAST_TIMEFTM_NONE = 0, | |
c7eb14d3 KZ |
122 | LAST_TIMEFTM_SHORT, |
123 | LAST_TIMEFTM_CTIME, | |
124 | LAST_TIMEFTM_ISO8601, | |
125 | ||
126 | LAST_TIMEFTM_HHMM, /* non-public */ | |
45f11b6b SK |
127 | }; |
128 | ||
c87e4fbb KZ |
129 | struct last_timefmt { |
130 | const char *name; | |
c7eb14d3 KZ |
131 | int in_len; /* log-in */ |
132 | int in_fmt; | |
133 | int out_len; /* log-out */ | |
134 | int out_fmt; | |
45f11b6b SK |
135 | }; |
136 | ||
c87e4fbb | 137 | static struct last_timefmt timefmts[] = { |
c7eb14d3 KZ |
138 | [LAST_TIMEFTM_NONE] = { .name = "notime" }, |
139 | [LAST_TIMEFTM_SHORT] = { | |
140 | .name = "short", | |
141 | .in_len = 16, | |
142 | .out_len = 7, | |
143 | .in_fmt = LAST_TIMEFTM_CTIME, | |
144 | .out_fmt = LAST_TIMEFTM_HHMM | |
145 | }, | |
146 | [LAST_TIMEFTM_CTIME] = { | |
147 | .name = "full", | |
148 | .in_len = 24, | |
149 | .out_len = 26, | |
150 | .in_fmt = LAST_TIMEFTM_CTIME, | |
151 | .out_fmt = LAST_TIMEFTM_CTIME | |
152 | }, | |
153 | [LAST_TIMEFTM_ISO8601] = { | |
154 | .name = "iso", | |
9fd0a7a9 WP |
155 | .in_len = 25, |
156 | .out_len = 27, | |
c7eb14d3 KZ |
157 | .in_fmt = LAST_TIMEFTM_ISO8601, |
158 | .out_fmt = LAST_TIMEFTM_ISO8601 | |
159 | } | |
45f11b6b SK |
160 | }; |
161 | ||
ce602720 | 162 | /* Global variables */ |
751947b6 | 163 | static unsigned int recsdone; /* Number of records listed */ |
77079432 | 164 | static time_t lastdate; /* Last date we've seen */ |
2e81d998 | 165 | static time_t currentdate; /* date when we started processing the file */ |
ce602720 | 166 | |
2cdbf06f | 167 | #ifndef FUZZ_TARGET |
45f11b6b | 168 | /* --time-format=option parser */ |
eb2306e6 | 169 | static int which_time_format(const char *s) |
45f11b6b | 170 | { |
c87e4fbb KZ |
171 | size_t i; |
172 | ||
173 | for (i = 0; i < ARRAY_SIZE(timefmts); i++) { | |
eb2306e6 | 174 | if (strcmp(timefmts[i].name, s) == 0) |
c87e4fbb KZ |
175 | return i; |
176 | } | |
eb2306e6 | 177 | errx(EXIT_FAILURE, _("unknown time format: %s"), s); |
45f11b6b | 178 | } |
2cdbf06f | 179 | #endif |
45f11b6b | 180 | |
ce602720 OO |
181 | /* |
182 | * Read one utmp entry, return in new format. | |
183 | * Automatically reposition file pointer. | |
184 | */ | |
b4b919fe | 185 | static int uread(FILE *fp, struct utmpx *u, int *quit, const char *filename) |
ce602720 OO |
186 | { |
187 | static int utsize; | |
188 | static char buf[UCHUNKSIZE]; | |
189 | char tmp[1024]; | |
190 | static off_t fpos; | |
191 | static int bpos; | |
192 | off_t o; | |
193 | ||
194 | if (quit == NULL && u != NULL) { | |
195 | /* | |
196 | * Normal read. | |
197 | */ | |
b4b919fe | 198 | return fread(u, sizeof(struct utmpx), 1, fp); |
ce602720 OO |
199 | } |
200 | ||
201 | if (u == NULL) { | |
202 | /* | |
203 | * Initialize and position. | |
204 | */ | |
b4b919fe | 205 | utsize = sizeof(struct utmpx); |
ce602720 OO |
206 | fseeko(fp, 0, SEEK_END); |
207 | fpos = ftello(fp); | |
208 | if (fpos == 0) | |
209 | return 0; | |
210 | o = ((fpos - 1) / UCHUNKSIZE) * UCHUNKSIZE; | |
211 | if (fseeko(fp, o, SEEK_SET) < 0) { | |
744c7fec | 212 | warn(_("seek on %s failed"), filename); |
ce602720 OO |
213 | return 0; |
214 | } | |
215 | bpos = (int)(fpos - o); | |
216 | if (fread(buf, bpos, 1, fp) != 1) { | |
744c7fec | 217 | warn(_("cannot read %s"), filename); |
ce602720 OO |
218 | return 0; |
219 | } | |
220 | fpos = o; | |
221 | return 1; | |
222 | } | |
223 | ||
224 | /* | |
225 | * Read one struct. From the buffer if possible. | |
226 | */ | |
227 | bpos -= utsize; | |
228 | if (bpos >= 0) { | |
b4b919fe | 229 | memcpy(u, buf + bpos, sizeof(struct utmpx)); |
ce602720 | 230 | return 1; |
6dbe3af9 | 231 | } |
db797f24 | 232 | |
ce602720 OO |
233 | /* |
234 | * Oops we went "below" the buffer. We should be able to | |
235 | * seek back UCHUNKSIZE bytes. | |
236 | */ | |
237 | fpos -= UCHUNKSIZE; | |
238 | if (fpos < 0) | |
239 | return 0; | |
240 | ||
241 | /* | |
242 | * Copy whatever is left in the buffer. | |
243 | */ | |
244 | memcpy(tmp + (-bpos), buf, utsize + bpos); | |
245 | if (fseeko(fp, fpos, SEEK_SET) < 0) { | |
744c7fec | 246 | warn(_("seek on %s failed"), filename); |
ce602720 OO |
247 | return 0; |
248 | } | |
249 | ||
250 | /* | |
251 | * Read another UCHUNKSIZE bytes. | |
252 | */ | |
253 | if (fread(buf, UCHUNKSIZE, 1, fp) != 1) { | |
744c7fec | 254 | warn(_("cannot read %s"), filename); |
ce602720 OO |
255 | return 0; |
256 | } | |
257 | ||
258 | /* | |
259 | * The end of the UCHUNKSIZE byte buffer should be the first | |
260 | * few bytes of the current struct utmp. | |
261 | */ | |
262 | memcpy(tmp, buf + UCHUNKSIZE + bpos, -bpos); | |
263 | bpos += UCHUNKSIZE; | |
264 | ||
b4b919fe | 265 | memcpy(u, tmp, sizeof(struct utmpx)); |
ce602720 OO |
266 | |
267 | return 1; | |
6dbe3af9 KZ |
268 | } |
269 | ||
2cdbf06f | 270 | #ifndef FUZZ_TARGET |
6dbe3af9 | 271 | /* |
ce602720 | 272 | * SIGINT handler |
6dbe3af9 | 273 | */ |
ce602720 OO |
274 | static void int_handler(int sig __attribute__((unused))) |
275 | { | |
32457b5e | 276 | ul_sig_err(EXIT_FAILURE, "Interrupted"); |
ce602720 | 277 | } |
8e5cf69f | 278 | |
ce602720 OO |
279 | /* |
280 | * SIGQUIT handler | |
281 | */ | |
282 | static void quit_handler(int sig __attribute__((unused))) | |
283 | { | |
32457b5e | 284 | ul_sig_warn("Interrupted"); |
ce602720 OO |
285 | signal(SIGQUIT, quit_handler); |
286 | } | |
2cdbf06f | 287 | #endif |
6dbe3af9 | 288 | |
ce602720 OO |
289 | /* |
290 | * Lookup a host with DNS. | |
291 | */ | |
292 | static int dns_lookup(char *result, int size, int useip, int32_t *a) | |
293 | { | |
294 | struct sockaddr_in sin; | |
295 | struct sockaddr_in6 sin6; | |
296 | struct sockaddr *sa; | |
297 | int salen, flags; | |
298 | int mapped = 0; | |
6dbe3af9 | 299 | |
ce602720 | 300 | flags = useip ? NI_NUMERICHOST : 0; |
6dbe3af9 | 301 | |
ce602720 OO |
302 | /* |
303 | * IPv4 or IPv6 ? | |
304 | * 1. If last 3 4bytes are 0, must be IPv4 | |
305 | * 2. If IPv6 in IPv4, handle as IPv4 | |
306 | * 3. Anything else is IPv6 | |
307 | * | |
308 | * Ugly. | |
309 | */ | |
310 | if (a[0] == 0 && a[1] == 0 && a[2] == (int32_t)htonl (0xffff)) | |
311 | mapped = 1; | |
312 | ||
313 | if (mapped || (a[1] == 0 && a[2] == 0 && a[3] == 0)) { | |
314 | /* IPv4 */ | |
315 | sin.sin_family = AF_INET; | |
316 | sin.sin_port = 0; | |
317 | sin.sin_addr.s_addr = mapped ? a[3] : a[0]; | |
318 | sa = (struct sockaddr *)&sin; | |
319 | salen = sizeof(sin); | |
320 | } else { | |
321 | /* IPv6 */ | |
322 | memset(&sin6, 0, sizeof(sin6)); | |
323 | sin6.sin6_family = AF_INET6; | |
324 | sin6.sin6_port = 0; | |
325 | memcpy(sin6.sin6_addr.s6_addr, a, 16); | |
326 | sa = (struct sockaddr *)&sin6; | |
327 | salen = sizeof(sin6); | |
c07ebfa1 | 328 | } |
ce602720 OO |
329 | |
330 | return getnameinfo(sa, salen, result, size, NULL, 0, flags); | |
6dbe3af9 KZ |
331 | } |
332 | ||
c7eb14d3 | 333 | static int time_formatter(int fmt, char *dst, size_t dlen, time_t *when) |
45f11b6b | 334 | { |
45f11b6b SK |
335 | int ret = 0; |
336 | ||
c7eb14d3 | 337 | switch (fmt) { |
45f11b6b SK |
338 | case LAST_TIMEFTM_NONE: |
339 | *dst = 0; | |
340 | break; | |
c7eb14d3 KZ |
341 | case LAST_TIMEFTM_HHMM: |
342 | { | |
3160589d SK |
343 | struct tm tm; |
344 | ||
345 | localtime_r(when, &tm); | |
346 | if (!snprintf(dst, dlen, "%02d:%02d", tm.tm_hour, tm.tm_min)) | |
c7eb14d3 | 347 | ret = -1; |
45f11b6b | 348 | break; |
c7eb14d3 KZ |
349 | } |
350 | case LAST_TIMEFTM_CTIME: | |
3160589d SK |
351 | { |
352 | char buf[CTIME_BUFSIZ]; | |
353 | ||
354 | ctime_r(when, buf); | |
355 | snprintf(dst, dlen, "%s", buf); | |
78acfddd | 356 | ret = rtrim_whitespace((unsigned char *) dst); |
45f11b6b | 357 | break; |
3160589d | 358 | } |
45f11b6b | 359 | case LAST_TIMEFTM_ISO8601: |
4111bb3a | 360 | ret = strtime_iso(when, ISO_TIMESTAMP_T, dst, dlen); |
45f11b6b SK |
361 | break; |
362 | default: | |
363 | abort(); | |
364 | } | |
365 | return ret; | |
366 | } | |
367 | ||
97bbb5e4 SK |
368 | /* |
369 | * Remove trailing spaces from a string. | |
370 | */ | |
371 | static void trim_trailing_spaces(char *s) | |
372 | { | |
373 | char *p; | |
374 | ||
375 | for (p = s; *p; ++p) | |
376 | continue; | |
377 | while (p > s && isspace(*--p)) | |
378 | continue; | |
379 | if (p > s) | |
380 | ++p; | |
381 | *p++ = '\n'; | |
382 | *p = '\0'; | |
383 | } | |
384 | ||
6dbe3af9 | 385 | /* |
ce602720 | 386 | * Show one line of information on screen |
6dbe3af9 | 387 | */ |
b4b919fe | 388 | static int list(const struct last_control *ctl, struct utmpx *p, time_t logout_time, int what) |
ce602720 | 389 | { |
2e81d998 | 390 | time_t secs, utmp_time; |
45f11b6b SK |
391 | char logintime[LAST_TIMESTAMP_LEN]; |
392 | char logouttime[LAST_TIMESTAMP_LEN]; | |
393 | char length[LAST_TIMESTAMP_LEN]; | |
ce602720 | 394 | char final[512]; |
a924b400 | 395 | char utline[sizeof(p->ut_line) + 1]; |
ce602720 | 396 | char domain[256]; |
ce602720 OO |
397 | int mins, hours, days; |
398 | int r, len; | |
c87e4fbb | 399 | struct last_timefmt *fmt; |
6dbe3af9 | 400 | |
ce602720 OO |
401 | /* |
402 | * uucp and ftp have special-type entries | |
403 | */ | |
0675f52a | 404 | mem2strcpy(utline, p->ut_line, sizeof(p->ut_line), sizeof(utline)); |
ce602720 OO |
405 | if (strncmp(utline, "ftp", 3) == 0 && isdigit(utline[3])) |
406 | utline[3] = 0; | |
407 | if (strncmp(utline, "uucp", 4) == 0 && isdigit(utline[4])) | |
408 | utline[4] = 0; | |
409 | ||
410 | /* | |
0e65dcde | 411 | * Is this something we want to show? |
ce602720 | 412 | */ |
83484375 | 413 | if (ctl->show) { |
328734c0 | 414 | char **walk; |
83484375 | 415 | for (walk = ctl->show; *walk; walk++) { |
a924b400 | 416 | if (strncmp(p->ut_user, *walk, sizeof(p->ut_user)) == 0 || |
ce602720 OO |
417 | strcmp(utline, *walk) == 0 || |
418 | (strncmp(utline, "tty", 3) == 0 && | |
419 | strcmp(utline + 3, *walk) == 0)) break; | |
420 | } | |
421 | if (*walk == NULL) return 0; | |
7eda085c | 422 | } |
ce602720 OO |
423 | |
424 | /* | |
425 | * Calculate times | |
426 | */ | |
c7eb14d3 KZ |
427 | fmt = &timefmts[ctl->time_fmt]; |
428 | ||
55771f54 | 429 | utmp_time = p->ut_tv.tv_sec; |
37f534a6 | 430 | |
d4ce90d4 SK |
431 | if (ctl->present) { |
432 | if (ctl->present < utmp_time) | |
433 | return 0; | |
434 | if (0 < logout_time && logout_time < ctl->present) | |
435 | return 0; | |
436 | } | |
c7eb14d3 KZ |
437 | |
438 | /* log-in time */ | |
439 | if (time_formatter(fmt->in_fmt, logintime, | |
440 | sizeof(logintime), &utmp_time) < 0) | |
45f11b6b SK |
441 | errx(EXIT_FAILURE, _("preallocation size exceeded")); |
442 | ||
c7eb14d3 | 443 | /* log-out time */ |
e1787b1a | 444 | secs = logout_time - utmp_time; /* Under strange circumstances, secs < 0 can happen */ |
ce602720 OO |
445 | mins = (secs / 60) % 60; |
446 | hours = (secs / 3600) % 24; | |
447 | days = secs / 86400; | |
31d28e09 | 448 | |
c4482f7b KZ |
449 | strcpy(logouttime, "- "); |
450 | if (time_formatter(fmt->out_fmt, logouttime + 2, | |
451 | sizeof(logouttime) - 2, &logout_time) < 0) | |
452 | errx(EXIT_FAILURE, _("preallocation size exceeded")); | |
453 | ||
2e81d998 | 454 | if (logout_time == currentdate) { |
c7eb14d3 | 455 | if (ctl->time_fmt > LAST_TIMEFTM_SHORT) { |
79fb7e18 | 456 | snprintf(logouttime, sizeof(logouttime), " still running"); |
d3108db1 RM |
457 | length[0] = 0; |
458 | } else { | |
79fb7e18 KZ |
459 | snprintf(logouttime, sizeof(logouttime), " still"); |
460 | snprintf(length, sizeof(length), "running"); | |
31d28e09 | 461 | } |
c7eb14d3 | 462 | } else if (days) { |
79fb7e18 | 463 | snprintf(length, sizeof(length), "(%d+%02d:%02d)", days, abs(hours), abs(mins)); /* hours and mins always shown as positive (w/o minus sign!) even if secs < 0 */ |
e1787b1a | 464 | } else if (hours) { |
79fb7e18 | 465 | snprintf(length, sizeof(length), " (%02d:%02d)", hours, abs(mins)); /* mins always shown as positive (w/o minus sign!) even if secs < 0 */ |
62f3e715 | 466 | } else if (secs >= 0) { |
79fb7e18 | 467 | snprintf(length, sizeof(length), " (%02d:%02d)", hours, mins); |
c7eb14d3 | 468 | } else { |
79fb7e18 | 469 | snprintf(length, sizeof(length), " (-00:%02d)", abs(mins)); /* mins always shown as positive (w/o minus sign!) even if secs < 0 */ |
c7eb14d3 | 470 | } |
ce602720 OO |
471 | |
472 | switch(what) { | |
473 | case R_CRASH: | |
9d0b73a6 | 474 | case R_REBOOT_CRASH: |
79fb7e18 | 475 | snprintf(logouttime, sizeof(logouttime), "- crash"); |
ce602720 OO |
476 | break; |
477 | case R_DOWN: | |
79fb7e18 | 478 | snprintf(logouttime, sizeof(logouttime), "- down "); |
ce602720 OO |
479 | break; |
480 | case R_NOW: | |
c7eb14d3 | 481 | if (ctl->time_fmt > LAST_TIMEFTM_SHORT) { |
79fb7e18 | 482 | snprintf(logouttime, sizeof(logouttime), " still logged in"); |
4fcbfaa8 RM |
483 | length[0] = 0; |
484 | } else { | |
79fb7e18 KZ |
485 | snprintf(logouttime, sizeof(logouttime), " still"); |
486 | snprintf(length, sizeof(length), "logged in"); | |
ce602720 | 487 | } |
6dbe3af9 | 488 | break; |
ce602720 | 489 | case R_PHANTOM: |
c7eb14d3 | 490 | if (ctl->time_fmt > LAST_TIMEFTM_SHORT) { |
79fb7e18 | 491 | snprintf(logouttime, sizeof(logouttime), " gone - no logout"); |
4fcbfaa8 | 492 | length[0] = 0; |
c7eb14d3 | 493 | } else if (ctl->time_fmt == LAST_TIMEFTM_SHORT) { |
79fb7e18 KZ |
494 | snprintf(logouttime, sizeof(logouttime), " gone"); |
495 | snprintf(length, sizeof(length), "- no logout"); | |
6e69f1ee RM |
496 | } else { |
497 | logouttime[0] = 0; | |
79fb7e18 | 498 | snprintf(length, sizeof(length), "no logout"); |
ce602720 OO |
499 | } |
500 | break; | |
ce602720 OO |
501 | case R_TIMECHANGE: |
502 | logouttime[0] = 0; | |
503 | length[0] = 0; | |
6dbe3af9 | 504 | break; |
ce602720 | 505 | case R_NORMAL: |
c7eb14d3 | 506 | case R_REBOOT: |
6dbe3af9 | 507 | break; |
5cae90f9 SK |
508 | default: |
509 | abort(); | |
ce602720 OO |
510 | } |
511 | ||
512 | /* | |
513 | * Look up host with DNS if needed. | |
514 | */ | |
515 | r = -1; | |
83484375 | 516 | if (ctl->usedns || ctl->useip) |
f2ff0adf | 517 | r = dns_lookup(domain, sizeof(domain), ctl->useip, (int32_t*)p->ut_addr_v6); |
22fbfdb8 KZ |
518 | if (r < 0) |
519 | mem2strcpy(domain, p->ut_host, sizeof(p->ut_host), sizeof(domain)); | |
c87e4fbb | 520 | |
83484375 SK |
521 | if (ctl->showhost) { |
522 | if (!ctl->altlist) { | |
ce602720 | 523 | len = snprintf(final, sizeof(final), |
5d7df6b7 TD |
524 | "%-8.*s%c%-12.12s%c%-16.*s%c%-*.*s%c%-*.*s%c%s\n", |
525 | ctl->name_len, p->ut_user, ctl->separator, utline, ctl->separator, | |
526 | ctl->domain_len, domain, ctl->separator, | |
527 | fmt->in_len, fmt->in_len, logintime, ctl->separator, fmt->out_len, fmt->out_len, | |
528 | logouttime, ctl->separator, length); | |
ce602720 OO |
529 | } else { |
530 | len = snprintf(final, sizeof(final), | |
5d7df6b7 TD |
531 | "%-8.*s%c%-12.12s%c%-*.*s%c%-*.*s%c%-12.12s%c%s\n", |
532 | ctl->name_len, p->ut_user, ctl->separator, utline, ctl->separator, | |
533 | fmt->in_len, fmt->in_len, logintime, ctl->separator, fmt->out_len, fmt->out_len, | |
534 | logouttime, ctl->separator, length, ctl->separator, domain); | |
5818a4aa | 535 | } |
ce602720 OO |
536 | } else |
537 | len = snprintf(final, sizeof(final), | |
5d7df6b7 TD |
538 | "%-8.*s%c%-12.12s%c%-*.*s%c%-*.*s%c%s\n", |
539 | ctl->name_len, p->ut_user, ctl->separator, utline, ctl->separator, | |
540 | fmt->in_len, fmt->in_len, logintime, ctl->separator, fmt->out_len, fmt->out_len, | |
541 | logouttime, ctl->separator, length); | |
ce602720 OO |
542 | |
543 | #if defined(__GLIBC__) | |
544 | # if (__GLIBC__ == 2) && (__GLIBC_MINOR__ == 0) | |
545 | final[sizeof(final)-1] = '\0'; | |
546 | # endif | |
547 | #endif | |
6dbe3af9 | 548 | |
97bbb5e4 | 549 | trim_trailing_spaces(final); |
ce602720 OO |
550 | /* |
551 | * Print out "final" string safely. | |
552 | */ | |
aa13246a | 553 | fputs_careful(final, stdout, '*', false, 0); |
ce602720 OO |
554 | |
555 | if (len < 0 || (size_t)len >= sizeof(final)) | |
556 | putchar('\n'); | |
557 | ||
558 | recsdone++; | |
83484375 | 559 | if (ctl->maxrecs && ctl->maxrecs <= recsdone) |
ce602720 OO |
560 | return 1; |
561 | ||
562 | return 0; | |
6dbe3af9 KZ |
563 | } |
564 | ||
2cdbf06f | 565 | #ifndef FUZZ_TARGET |
86be6a32 | 566 | static void __attribute__((__noreturn__)) usage(const struct last_control *ctl) |
ce602720 | 567 | { |
86be6a32 | 568 | FILE *out = stdout; |
293e0c90 KZ |
569 | fputs(USAGE_HEADER, out); |
570 | fprintf(out, _( | |
b8672754 | 571 | " %s [options] [<username>...] [<tty>...]\n"), program_invocation_short_name); |
293e0c90 | 572 | |
451dbcfa BS |
573 | fputs(USAGE_SEPARATOR, out); |
574 | fputs(_("Show a listing of last logged in users.\n"), out); | |
575 | ||
293e0c90 KZ |
576 | fputs(USAGE_OPTIONS, out); |
577 | fputs(_(" -<number> how many lines to show\n"), out); | |
578 | fputs(_(" -a, --hostlast display hostnames in the last column\n"), out); | |
579 | fputs(_(" -d, --dns translate the IP number back into a hostname\n"), out); | |
580 | fprintf(out, | |
f06abd22 | 581 | _(" -f, --file <file> use a specific file instead of %s\n"), ctl->lastb ? _PATH_BTMP : _PATH_WTMP); |
293e0c90 KZ |
582 | fputs(_(" -F, --fulltimes print full login and logout times and dates\n"), out); |
583 | fputs(_(" -i, --ip display IP numbers in numbers-and-dots notation\n"), out); | |
584 | fputs(_(" -n, --limit <number> how many lines to show\n"), out); | |
585 | fputs(_(" -R, --nohostname don't display the hostname field\n"), out); | |
dd50168b SK |
586 | fputs(_(" -s, --since <time> display the lines since the specified time\n"), out); |
587 | fputs(_(" -t, --until <time> display the lines until the specified time\n"), out); | |
5d7df6b7 | 588 | fputs(_(" -T, --tab-separated use tabs as delimiters\n"), out); |
09af3db4 | 589 | fputs(_(" -p, --present <time> display who were present at the specified time\n"), out); |
293e0c90 KZ |
590 | fputs(_(" -w, --fullnames display full user and domain names\n"), out); |
591 | fputs(_(" -x, --system display system shutdown entries and run level changes\n"), out); | |
09af3db4 BS |
592 | fputs(_(" --time-format <format> show timestamps in the specified <format>:\n" |
593 | " notime|short|full|iso\n"), out); | |
293e0c90 KZ |
594 | |
595 | fputs(USAGE_SEPARATOR, out); | |
bad4c729 MY |
596 | fprintf(out, USAGE_HELP_OPTIONS(22)); |
597 | fprintf(out, USAGE_MAN_TAIL("last(1)")); | |
293e0c90 KZ |
598 | |
599 | exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); | |
6dbe3af9 | 600 | } |
2cdbf06f | 601 | #endif |
6dbe3af9 | 602 | |
b4b919fe | 603 | static int is_phantom(const struct last_control *ctl, struct utmpx *ut) |
404fa3f9 SK |
604 | { |
605 | struct passwd *pw; | |
f64ddc95 | 606 | char path[sizeof(ut->ut_line) + 16]; |
4b646f01 | 607 | char user[sizeof(ut->ut_user) + 1]; |
0e5218ac | 608 | int ret = 0; |
404fa3f9 | 609 | |
55771f54 | 610 | if (ut->ut_tv.tv_sec < ctl->boot_time.tv_sec) |
0e5218ac | 611 | return 1; |
4b646f01 KZ |
612 | |
613 | mem2strcpy(user, ut->ut_user, sizeof(ut->ut_user), sizeof(user)); | |
614 | pw = getpwnam(user); | |
404fa3f9 SK |
615 | if (!pw) |
616 | return 1; | |
10a0a9cb | 617 | snprintf(path, sizeof(path), "/proc/%u/loginuid", ut->ut_pid); |
8813da1e SK |
618 | if (access(path, R_OK) == 0) { |
619 | unsigned int loginuid; | |
620 | FILE *f = NULL; | |
621 | ||
622 | if (!(f = fopen(path, "r"))) | |
623 | return 1; | |
624 | if (fscanf(f, "%u", &loginuid) != 1) | |
625 | ret = 1; | |
626 | fclose(f); | |
627 | if (!ret && pw->pw_uid != loginuid) | |
628 | return 1; | |
629 | } else { | |
630 | struct stat st; | |
10a0a9cb | 631 | char utline[sizeof(ut->ut_line) + 1]; |
2e118e70 | 632 | |
10a0a9cb KZ |
633 | mem2strcpy(utline, ut->ut_line, sizeof(ut->ut_line), sizeof(utline)); |
634 | ||
635 | snprintf(path, sizeof(path), "/dev/%s", utline); | |
8813da1e SK |
636 | if (stat(path, &st)) |
637 | return 1; | |
638 | if (pw->pw_uid != st.st_uid) | |
639 | return 1; | |
640 | } | |
404fa3f9 SK |
641 | return ret; |
642 | } | |
293e0c90 | 643 | |
744c7fec KZ |
644 | static void process_wtmp_file(const struct last_control *ctl, |
645 | const char *filename) | |
ce602720 | 646 | { |
9e930041 | 647 | FILE *fp; /* File pointer of wtmp file */ |
77079432 | 648 | |
b4b919fe | 649 | struct utmpx ut; /* Current utmp entry */ |
da1a8ed0 | 650 | struct utmplist *ulist = NULL; /* All entries */ |
77079432 KZ |
651 | struct utmplist *p; /* Pointer into utmplist */ |
652 | struct utmplist *next; /* Pointer into utmplist */ | |
653 | ||
654 | time_t lastboot = 0; /* Last boottime */ | |
655 | time_t lastrch = 0; /* Last run level change */ | |
656 | time_t lastdown; /* Last downtime */ | |
657 | time_t begintime; /* When wtmp begins */ | |
658 | int whydown = 0; /* Why we went down: crash or shutdown */ | |
659 | ||
660 | int c, x; /* Scratch */ | |
661 | struct stat st; /* To stat the [uw]tmp file */ | |
662 | int quit = 0; /* Flag */ | |
663 | int down = 0; /* Down flag */ | |
77079432 | 664 | |
2cdbf06f | 665 | #ifndef FUZZ_TARGET |
77079432 | 666 | time(&lastdown); |
2cdbf06f EV |
667 | #else |
668 | lastdown = 1596001948; | |
669 | #endif | |
77079432 KZ |
670 | /* |
671 | * Fill in 'lastdate' | |
672 | */ | |
2e81d998 | 673 | lastdate = currentdate = lastrch = lastdown; |
ce602720 | 674 | |
2cdbf06f | 675 | #ifndef FUZZ_TARGET |
77079432 KZ |
676 | /* |
677 | * Install signal handlers | |
678 | */ | |
679 | signal(SIGINT, int_handler); | |
680 | signal(SIGQUIT, quit_handler); | |
2cdbf06f | 681 | #endif |
ce602720 | 682 | |
77079432 KZ |
683 | /* |
684 | * Open the utmp file | |
685 | */ | |
da1a8ed0 KZ |
686 | if ((fp = fopen(filename, "r")) == NULL) |
687 | err(EXIT_FAILURE, _("cannot open %s"), filename); | |
6dbe3af9 KZ |
688 | |
689 | /* | |
77079432 | 690 | * Optimize the buffer size. |
ce602720 | 691 | */ |
77079432 KZ |
692 | setvbuf(fp, NULL, _IOFBF, UCHUNKSIZE); |
693 | ||
ce602720 | 694 | /* |
77079432 | 695 | * Read first structure to capture the time field |
6dbe3af9 | 696 | */ |
744c7fec | 697 | if (uread(fp, &ut, NULL, filename) == 1) |
55771f54 | 698 | begintime = ut.ut_tv.tv_sec; |
ce602720 | 699 | else { |
d879e052 | 700 | if (fstat(fileno(fp), &st) != 0) |
da1a8ed0 | 701 | err(EXIT_FAILURE, _("stat of %s failed"), filename); |
77079432 KZ |
702 | begintime = st.st_ctime; |
703 | quit = 1; | |
704 | } | |
705 | ||
706 | /* | |
707 | * Go to end of file minus one structure | |
708 | * and/or initialize utmp reading code. | |
709 | */ | |
744c7fec | 710 | uread(fp, NULL, NULL, filename); |
77079432 KZ |
711 | |
712 | /* | |
713 | * Read struct after struct backwards from the file. | |
714 | */ | |
715 | while (!quit) { | |
716 | ||
744c7fec | 717 | if (uread(fp, &ut, &quit, filename) != 1) |
77079432 KZ |
718 | break; |
719 | ||
55771f54 | 720 | if (ctl->since && ut.ut_tv.tv_sec < ctl->since) |
dd50168b SK |
721 | continue; |
722 | ||
55771f54 | 723 | if (ctl->until && ctl->until < ut.ut_tv.tv_sec) |
77079432 KZ |
724 | continue; |
725 | ||
55771f54 | 726 | lastdate = ut.ut_tv.tv_sec; |
77079432 | 727 | |
83484375 | 728 | if (ctl->lastb) { |
55771f54 | 729 | quit = list(ctl, &ut, ut.ut_tv.tv_sec, R_NORMAL); |
77079432 KZ |
730 | continue; |
731 | } | |
732 | ||
ce602720 | 733 | /* |
77079432 | 734 | * Set ut_type to the correct type. |
ce602720 | 735 | */ |
77079432 KZ |
736 | if (strncmp(ut.ut_line, "~", 1) == 0) { |
737 | if (strncmp(ut.ut_user, "shutdown", 8) == 0) | |
738 | ut.ut_type = SHUTDOWN_TIME; | |
739 | else if (strncmp(ut.ut_user, "reboot", 6) == 0) | |
740 | ut.ut_type = BOOT_TIME; | |
741 | else if (strncmp(ut.ut_user, "runlevel", 8) == 0) | |
742 | ut.ut_type = RUN_LVL; | |
743 | } | |
744 | #if 1 /*def COMPAT*/ | |
ce602720 | 745 | /* |
77079432 KZ |
746 | * For stupid old applications that don't fill in |
747 | * ut_type correctly. | |
ce602720 | 748 | */ |
77079432 KZ |
749 | else { |
750 | if (ut.ut_type != DEAD_PROCESS && | |
cfa7fe89 | 751 | ut.ut_user[0] && ut.ut_line[0] && |
6cd00432 | 752 | strncmp(ut.ut_user, "LOGIN", 5) != 0) |
77079432 KZ |
753 | ut.ut_type = USER_PROCESS; |
754 | /* | |
755 | * Even worse, applications that write ghost | |
756 | * entries: ut_type set to USER_PROCESS but | |
cfa7fe89 | 757 | * empty ut_user... |
77079432 | 758 | */ |
cfa7fe89 | 759 | if (ut.ut_user[0] == 0) |
77079432 KZ |
760 | ut.ut_type = DEAD_PROCESS; |
761 | ||
762 | /* | |
763 | * Clock changes. | |
764 | */ | |
6cd00432 | 765 | if (strncmp(ut.ut_user, "date", 4) == 0) { |
77079432 KZ |
766 | if (ut.ut_line[0] == '|') |
767 | ut.ut_type = OLD_TIME; | |
768 | if (ut.ut_line[0] == '{') | |
769 | ut.ut_type = NEW_TIME; | |
770 | } | |
6dbe3af9 | 771 | } |
ce602720 | 772 | #endif |
77079432 | 773 | switch (ut.ut_type) { |
ce602720 | 774 | case SHUTDOWN_TIME: |
83484375 | 775 | if (ctl->extended) { |
ce602720 | 776 | strcpy(ut.ut_line, "system down"); |
83484375 | 777 | quit = list(ctl, &ut, lastboot, R_NORMAL); |
ce602720 | 778 | } |
55771f54 | 779 | lastdown = lastrch = ut.ut_tv.tv_sec; |
ce602720 OO |
780 | down = 1; |
781 | break; | |
782 | case OLD_TIME: | |
783 | case NEW_TIME: | |
83484375 | 784 | if (ctl->extended) { |
ce602720 OO |
785 | strcpy(ut.ut_line, |
786 | ut.ut_type == NEW_TIME ? "new time" : | |
787 | "old time"); | |
83484375 | 788 | quit = list(ctl, &ut, lastdown, R_TIMECHANGE); |
ce602720 OO |
789 | } |
790 | break; | |
791 | case BOOT_TIME: | |
792 | strcpy(ut.ut_line, "system boot"); | |
9d0b73a6 TR |
793 | if (lastdown > lastboot && lastdown != currentdate) |
794 | quit = list(ctl, &ut, lastboot, R_REBOOT_CRASH); | |
795 | else | |
796 | quit = list(ctl, &ut, lastdown, R_REBOOT); | |
55771f54 | 797 | lastboot = ut.ut_tv.tv_sec; |
ce602720 OO |
798 | down = 1; |
799 | break; | |
800 | case RUN_LVL: | |
801 | x = ut.ut_pid & 255; | |
83484375 | 802 | if (ctl->extended) { |
79fb7e18 | 803 | snprintf(ut.ut_line, sizeof(ut.ut_line), "(to lvl %c)", x); |
83484375 | 804 | quit = list(ctl, &ut, lastrch, R_NORMAL); |
ce602720 OO |
805 | } |
806 | if (x == '0' || x == '6') { | |
55771f54 | 807 | lastdown = ut.ut_tv.tv_sec; |
ce602720 OO |
808 | down = 1; |
809 | ut.ut_type = SHUTDOWN_TIME; | |
810 | } | |
55771f54 | 811 | lastrch = ut.ut_tv.tv_sec; |
ce602720 | 812 | break; |
6dbe3af9 | 813 | |
ce602720 OO |
814 | case USER_PROCESS: |
815 | /* | |
77079432 KZ |
816 | * This was a login - show the first matching |
817 | * logout record and delete all records with | |
818 | * the same ut_line. | |
ce602720 OO |
819 | */ |
820 | c = 0; | |
da1a8ed0 | 821 | for (p = ulist; p; p = next) { |
ce602720 OO |
822 | next = p->next; |
823 | if (strncmp(p->ut.ut_line, ut.ut_line, | |
a924b400 | 824 | sizeof(ut.ut_line)) == 0) { |
ce602720 OO |
825 | /* Show it */ |
826 | if (c == 0) { | |
55771f54 | 827 | quit = list(ctl, &ut, p->ut.ut_tv.tv_sec, R_NORMAL); |
ce602720 OO |
828 | c = 1; |
829 | } | |
da1a8ed0 KZ |
830 | if (p->next) |
831 | p->next->prev = p->prev; | |
ce602720 OO |
832 | if (p->prev) |
833 | p->prev->next = p->next; | |
834 | else | |
da1a8ed0 | 835 | ulist = p->next; |
ce602720 OO |
836 | free(p); |
837 | } | |
838 | } | |
839 | /* | |
77079432 KZ |
840 | * Not found? Then crashed, down, still |
841 | * logged in, or missing logout record. | |
ce602720 OO |
842 | */ |
843 | if (c == 0) { | |
ee24e58f | 844 | if (!lastboot) { |
ce602720 OO |
845 | c = R_NOW; |
846 | /* Is process still alive? */ | |
0e5218ac | 847 | if (is_phantom(ctl, &ut)) |
ce602720 OO |
848 | c = R_PHANTOM; |
849 | } else | |
850 | c = whydown; | |
83484375 | 851 | quit = list(ctl, &ut, lastboot, c); |
ce602720 | 852 | } |
b1557fe9 | 853 | /* fallthrough */ |
ce602720 OO |
854 | |
855 | case DEAD_PROCESS: | |
856 | /* | |
77079432 KZ |
857 | * Just store the data if it is |
858 | * interesting enough. | |
ce602720 OO |
859 | */ |
860 | if (ut.ut_line[0] == 0) | |
861 | break; | |
a9f789e5 | 862 | p = xmalloc(sizeof(struct utmplist)); |
b4b919fe | 863 | memcpy(&p->ut, &ut, sizeof(struct utmpx)); |
da1a8ed0 | 864 | p->next = ulist; |
ce602720 | 865 | p->prev = NULL; |
da1a8ed0 KZ |
866 | if (ulist) |
867 | ulist->prev = p; | |
868 | ulist = p; | |
ce602720 OO |
869 | break; |
870 | ||
5cae90f9 SK |
871 | case EMPTY: |
872 | case INIT_PROCESS: | |
873 | case LOGIN_PROCESS: | |
b4b919fe | 874 | #ifdef ACCOUNTING |
5cae90f9 | 875 | case ACCOUNTING: |
b4b919fe | 876 | #endif |
5cae90f9 SK |
877 | /* ignored ut_types */ |
878 | break; | |
879 | ||
880 | default: | |
9e930041 | 881 | warnx("unrecognized ut_type: %d", ut.ut_type); |
ce602720 | 882 | } |
77079432 KZ |
883 | |
884 | /* | |
885 | * If we saw a shutdown/reboot record we can remove | |
da1a8ed0 | 886 | * the entire current ulist. |
77079432 KZ |
887 | */ |
888 | if (down) { | |
55771f54 | 889 | lastboot = ut.ut_tv.tv_sec; |
77079432 | 890 | whydown = (ut.ut_type == SHUTDOWN_TIME) ? R_DOWN : R_CRASH; |
da1a8ed0 | 891 | for (p = ulist; p; p = next) { |
77079432 KZ |
892 | next = p->next; |
893 | free(p); | |
894 | } | |
da1a8ed0 | 895 | ulist = NULL; |
77079432 KZ |
896 | down = 0; |
897 | } | |
ce602720 | 898 | } |
ce602720 | 899 | |
78acfddd SK |
900 | if (ctl->time_fmt != LAST_TIMEFTM_NONE) { |
901 | struct last_timefmt *fmt; | |
902 | char timestr[LAST_TIMESTAMP_LEN]; | |
903 | char *tmp = xstrdup(filename); | |
904 | ||
905 | fmt = &timefmts[ctl->time_fmt]; | |
906 | if (time_formatter(fmt->in_fmt, timestr, | |
907 | sizeof(timestr), &begintime) < 0) | |
908 | errx(EXIT_FAILURE, _("preallocation size exceeded")); | |
909 | printf(_("\n%s begins %s\n"), basename(tmp), timestr); | |
c6ba16c6 RM |
910 | free(tmp); |
911 | } | |
78acfddd | 912 | |
77079432 | 913 | fclose(fp); |
da1a8ed0 KZ |
914 | |
915 | for (p = ulist; p; p = next) { | |
bce5163b SK |
916 | next = p->next; |
917 | free(p); | |
918 | } | |
7ec78229 SK |
919 | } |
920 | ||
2cdbf06f | 921 | #ifdef FUZZ_TARGET |
cd588d66 KZ |
922 | # include "all-io.h" |
923 | ||
2cdbf06f EV |
924 | int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { |
925 | struct last_control ctl = { | |
926 | .showhost = TRUE, | |
927 | .name_len = LAST_LOGIN_LEN, | |
928 | .time_fmt = LAST_TIMEFTM_SHORT, | |
929 | .domain_len = LAST_DOMAIN_LEN, | |
930 | .boot_time = { | |
931 | .tv_sec = 1595978419, | |
932 | .tv_usec = 816074 | |
933 | } | |
934 | }; | |
935 | char name[] = "/tmp/test-last-fuzz.XXXXXX"; | |
936 | int fd; | |
2cdbf06f | 937 | |
adcd2c32 | 938 | fd = mkstemp_cloexec(name); |
cd588d66 | 939 | if (fd < 0) |
adcd2c32 | 940 | err(EXIT_FAILURE, "mkstemp() failed"); |
cd588d66 KZ |
941 | if (write_all(fd, data, size) != 0) |
942 | err(EXIT_FAILURE, "write() failed"); | |
2cdbf06f EV |
943 | |
944 | process_wtmp_file(&ctl, name); | |
945 | ||
946 | close(fd); | |
947 | unlink(name); | |
948 | ||
949 | return 0; | |
950 | } | |
951 | #else | |
7ec78229 SK |
952 | int main(int argc, char **argv) |
953 | { | |
83484375 SK |
954 | struct last_control ctl = { |
955 | .showhost = TRUE, | |
956 | .name_len = LAST_LOGIN_LEN, | |
c7eb14d3 | 957 | .time_fmt = LAST_TIMEFTM_SHORT, |
83484375 SK |
958 | .domain_len = LAST_DOMAIN_LEN |
959 | }; | |
744c7fec KZ |
960 | char **files = NULL; |
961 | size_t i, nfiles = 0; | |
83484375 | 962 | int c; |
3a4ae395 | 963 | usec_t p; |
7ec78229 | 964 | |
45f11b6b SK |
965 | enum { |
966 | OPT_TIME_FORMAT = CHAR_MAX + 1 | |
967 | }; | |
7ec78229 SK |
968 | static const struct option long_opts[] = { |
969 | { "limit", required_argument, NULL, 'n' }, | |
970 | { "help", no_argument, NULL, 'h' }, | |
971 | { "file", required_argument, NULL, 'f' }, | |
972 | { "nohostname", no_argument, NULL, 'R' }, | |
973 | { "version", no_argument, NULL, 'V' }, | |
974 | { "hostlast", no_argument, NULL, 'a' }, | |
dd50168b | 975 | { "since", required_argument, NULL, 's' }, |
7ec78229 | 976 | { "until", required_argument, NULL, 't' }, |
37f534a6 | 977 | { "present", required_argument, NULL, 'p' }, |
7ec78229 SK |
978 | { "system", no_argument, NULL, 'x' }, |
979 | { "dns", no_argument, NULL, 'd' }, | |
980 | { "ip", no_argument, NULL, 'i' }, | |
981 | { "fulltimes", no_argument, NULL, 'F' }, | |
982 | { "fullnames", no_argument, NULL, 'w' }, | |
5d7df6b7 | 983 | { "tab-separated", no_argument, NULL, 'T' }, |
45f11b6b | 984 | { "time-format", required_argument, NULL, OPT_TIME_FORMAT }, |
7ec78229 SK |
985 | { NULL, 0, NULL, 0 } |
986 | }; | |
a7349ee3 | 987 | static const ul_excl_t excl[] = { /* rows and cols in ASCII order */ |
2ea747eb KZ |
988 | { 'F', OPT_TIME_FORMAT }, /* fulltime, time-format */ |
989 | { 0 } | |
990 | }; | |
991 | int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT; | |
7ec78229 SK |
992 | |
993 | setlocale(LC_ALL, ""); | |
994 | bindtextdomain(PACKAGE, LOCALEDIR); | |
995 | textdomain(PACKAGE); | |
2c308875 | 996 | close_stdout_atexit(); |
f06abd22 SK |
997 | /* |
998 | * Which file do we want to read? | |
999 | */ | |
1000 | ctl.lastb = strcmp(program_invocation_short_name, "lastb") == 0 ? 1 : 0; | |
5d7df6b7 | 1001 | ctl.separator = ' '; |
7ec78229 | 1002 | while ((c = getopt_long(argc, argv, |
5d7df6b7 | 1003 | "hVf:n:RxadFit:p:s:T0123456789w", long_opts, NULL)) != -1) { |
2ea747eb KZ |
1004 | |
1005 | err_exclusive_options(c, long_opts, excl, excl_st); | |
1006 | ||
7ec78229 SK |
1007 | switch(c) { |
1008 | case 'h': | |
86be6a32 | 1009 | usage(&ctl); |
7ec78229 SK |
1010 | break; |
1011 | case 'V': | |
2c308875 | 1012 | print_version(EXIT_SUCCESS); |
7ec78229 | 1013 | case 'R': |
ee24e58f | 1014 | ctl.showhost = 0; |
7ec78229 SK |
1015 | break; |
1016 | case 'x': | |
ee24e58f | 1017 | ctl.extended = 1; |
7ec78229 SK |
1018 | break; |
1019 | case 'n': | |
83484375 | 1020 | ctl.maxrecs = strtos32_or_err(optarg, _("failed to parse number")); |
7ec78229 SK |
1021 | break; |
1022 | case 'f': | |
744c7fec KZ |
1023 | if (!files) |
1024 | files = xmalloc(sizeof(char *) * argc); | |
1025 | files[nfiles++] = xstrdup(optarg); | |
7ec78229 SK |
1026 | break; |
1027 | case 'd': | |
ee24e58f | 1028 | ctl.usedns = 1; |
7ec78229 SK |
1029 | break; |
1030 | case 'i': | |
ee24e58f | 1031 | ctl.useip = 1; |
7ec78229 SK |
1032 | break; |
1033 | case 'a': | |
ee24e58f | 1034 | ctl.altlist = 1; |
7ec78229 SK |
1035 | break; |
1036 | case 'F': | |
c7eb14d3 | 1037 | ctl.time_fmt = LAST_TIMEFTM_CTIME; |
7ec78229 | 1038 | break; |
37f534a6 | 1039 | case 'p': |
3a4ae395 | 1040 | if (parse_timestamp(optarg, &p) < 0) |
37f534a6 | 1041 | errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg); |
83484375 | 1042 | ctl.present = (time_t) (p / 1000000); |
37f534a6 | 1043 | break; |
dd50168b | 1044 | case 's': |
dd50168b SK |
1045 | if (parse_timestamp(optarg, &p) < 0) |
1046 | errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg); | |
83484375 | 1047 | ctl.since = (time_t) (p / 1000000); |
dd50168b | 1048 | break; |
7ec78229 | 1049 | case 't': |
3a4ae395 | 1050 | if (parse_timestamp(optarg, &p) < 0) |
7ec78229 | 1051 | errx(EXIT_FAILURE, _("invalid time value \"%s\""), optarg); |
83484375 | 1052 | ctl.until = (time_t) (p / 1000000); |
7ec78229 SK |
1053 | break; |
1054 | case 'w': | |
020061e5 TW |
1055 | if (ctl.name_len < sizeof_member(struct utmpx, ut_user)) |
1056 | ctl.name_len = sizeof_member(struct utmpx, ut_user); | |
1057 | if (ctl.domain_len < sizeof_member(struct utmpx, ut_host)) | |
1058 | ctl.domain_len = sizeof_member(struct utmpx, ut_host); | |
7ec78229 SK |
1059 | break; |
1060 | case '0': case '1': case '2': case '3': case '4': | |
1061 | case '5': case '6': case '7': case '8': case '9': | |
83484375 | 1062 | ctl.maxrecs = 10 * ctl.maxrecs + c - '0'; |
7ec78229 | 1063 | break; |
45f11b6b SK |
1064 | case OPT_TIME_FORMAT: |
1065 | ctl.time_fmt = which_time_format(optarg); | |
45f11b6b | 1066 | break; |
5d7df6b7 TD |
1067 | case 'T': |
1068 | ctl.separator = '\t'; | |
1069 | break; | |
7ec78229 | 1070 | default: |
677ec86c | 1071 | errtryhelp(EXIT_FAILURE); |
7ec78229 SK |
1072 | } |
1073 | } | |
1074 | ||
1075 | if (optind < argc) | |
83484375 | 1076 | ctl.show = argv + optind; |
7ec78229 | 1077 | |
744c7fec KZ |
1078 | if (!files) { |
1079 | files = xmalloc(sizeof(char *)); | |
1080 | files[nfiles++] = xstrdup(ctl.lastb ? _PATH_BTMP : _PATH_WTMP); | |
7ec78229 SK |
1081 | } |
1082 | ||
744c7fec | 1083 | for (i = 0; i < nfiles; i++) { |
0e5218ac | 1084 | get_boot_time(&ctl.boot_time); |
744c7fec KZ |
1085 | process_wtmp_file(&ctl, files[i]); |
1086 | free(files[i]); | |
7ec78229 | 1087 | } |
744c7fec | 1088 | free(files); |
77079432 | 1089 | return EXIT_SUCCESS; |
6dbe3af9 | 1090 | } |
2cdbf06f | 1091 | #endif |