xref: /dragonfly/usr.sbin/ac/ac.c (revision 1de703da) 
1 /*
2  *      Copyright (c) 1994 Christopher G. Demetriou.
3  *      @(#)Copyright (c) 1994, Simon J. Gerraty.
4  *
5  *      This is free software.  It comes with NO WARRANTY.
6  *      Permission to use, modify and distribute this source code
7  *      is granted subject to the following conditions.
8  *      1/ that the above copyright notice and this notice
9  *      are preserved in all copies and that due credit be given
10  *      to the author.
11  *      2/ that any changes to this code are clearly commented
12  *      as such so that the author does not get blamed for bugs
13  *      other than his own.
14  *
15  * $FreeBSD: src/usr.sbin/ac/ac.c,v 1.14.2.2 2002/03/12 19:55:04 phantom Exp $
16  * $DragonFly: src/usr.sbin/ac/ac.c,v 1.2 2003/06/17 04:29:52 dillon Exp $
17  */
18 
19 #include <sys/types.h>
20 #include <sys/file.h>
21 #include <sys/time.h>
22 #include <err.h>
23 #include <errno.h>
24 #include <langinfo.h>
25 #include <locale.h>
26 #include <pwd.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <utmp.h>
32 
33 /*
34  * this is for our list of currently logged in sessions
35  */
36 struct utmp_list {
37 	struct utmp_list *next;
38 	struct utmp usr;
39 };
40 
41 /*
42  * this is for our list of users that are accumulating time.
43  */
44 struct user_list {
45 	struct user_list *next;
46 	char	name[UT_NAMESIZE+1];
47 	time_t	secs;
48 };
49 
50 /*
51  * this is for chosing whether to ignore a login
52  */
53 struct tty_list {
54 	struct tty_list *next;
55 	char	name[UT_LINESIZE+3];
56 	int	len;
57 	int	ret;
58 };
59 
60 /*
61  * globals - yes yuk
62  */
63 #ifdef CONSOLE_TTY
64 static char 	*Console = CONSOLE_TTY;
65 #endif
66 static time_t	Total = 0;
67 static time_t	FirstTime = 0;
68 static int	Flags = 0;
69 static struct user_list *Users = NULL;
70 static struct tty_list *Ttys = NULL;
71 
72 #define NEW(type) (type *)malloc(sizeof (type))
73 
74 #define	AC_W	1				/* not _PATH_WTMP */
75 #define	AC_D	2				/* daily totals (ignore -p) */
76 #define	AC_P	4				/* per-user totals */
77 #define	AC_U	8				/* specified users only */
78 #define	AC_T	16				/* specified ttys only */
79 
80 #ifdef DEBUG
81 static int Debug = 0;
82 #endif
83 
84 int			main __P((int, char **));
85 int			ac __P((FILE *));
86 struct tty_list		*add_tty __P((char *));
87 int			do_tty __P((char *));
88 FILE			*file __P((char *));
89 struct utmp_list	*log_in __P((struct utmp_list *, struct utmp *));
90 struct utmp_list	*log_out __P((struct utmp_list *, struct utmp *));
91 int			on_console __P((struct utmp_list *));
92 void			show __P((char *, time_t));
93 void			show_today __P((struct user_list *, struct utmp_list *,
94 			    time_t));
95 void			show_users __P((struct user_list *));
96 struct user_list	*update_user __P((struct user_list *, char *, time_t));
97 void			usage __P((void));
98 
99 /*
100  * open wtmp or die
101  */
102 FILE *
103 file(name)
104 	char *name;
105 {
106 	FILE *fp;
107 
108 	if ((fp = fopen(name, "r")) == NULL)
109 		err(1, "%s", name);
110 	/* in case we want to discriminate */
111 	if (strcmp(_PATH_WTMP, name))
112 		Flags |= AC_W;
113 	return fp;
114 }
115 
116 struct tty_list *
117 add_tty(name)
118 	char *name;
119 {
120 	struct tty_list *tp;
121 	register char *rcp;
122 
123 	Flags |= AC_T;
124 
125 	if ((tp = NEW(struct tty_list)) == NULL)
126 		errx(1, "malloc failed");
127 	tp->len = 0;				/* full match */
128 	tp->ret = 1;				/* do if match */
129 	if (*name == '!') {			/* don't do if match */
130 		tp->ret = 0;
131 		name++;
132 	}
133 	(void)strncpy(tp->name, name, sizeof (tp->name) - 1);
134 	tp->name[sizeof (tp->name) - 1] = '\0';
135 	if ((rcp = strchr(tp->name, '*')) != NULL) {	/* wild card */
136 		*rcp = '\0';
137 		tp->len = strlen(tp->name);	/* match len bytes only */
138 	}
139 	tp->next = Ttys;
140 	Ttys = tp;
141 	return Ttys;
142 }
143 
144 /*
145  * should we process the named tty?
146  */
147 int
148 do_tty(name)
149 	char *name;
150 {
151 	struct tty_list *tp;
152 	int def_ret = 0;
153 
154 	for (tp = Ttys; tp != NULL; tp = tp->next) {
155 		if (tp->ret == 0)		/* specific don't */
156 			def_ret = 1;		/* default do */
157 		if (tp->len != 0) {
158 			if (strncmp(name, tp->name, tp->len) == 0)
159 				return tp->ret;
160 		} else {
161 			if (strncmp(name, tp->name, sizeof (tp->name)) == 0)
162 				return tp->ret;
163 		}
164 	}
165 	return def_ret;
166 }
167 
168 #ifdef CONSOLE_TTY
169 /*
170  * is someone logged in on Console?
171  */
172 int
173 on_console(head)
174 	struct utmp_list *head;
175 {
176 	struct utmp_list *up;
177 
178 	for (up = head; up; up = up->next) {
179 		if (strncmp(up->usr.ut_line, Console,
180 		    sizeof (up->usr.ut_line)) == 0)
181 			return 1;
182 	}
183 	return 0;
184 }
185 #endif
186 
187 /*
188  * update user's login time
189  */
190 struct user_list *
191 update_user(head, name, secs)
192 	struct user_list *head;
193 	char	*name;
194 	time_t	secs;
195 {
196 	struct user_list *up;
197 
198 	for (up = head; up != NULL; up = up->next) {
199 		if (strncmp(up->name, name, UT_NAMESIZE) == 0) {
200 			up->secs += secs;
201 			Total += secs;
202 			return head;
203 		}
204 	}
205 	/*
206 	 * not found so add new user unless specified users only
207 	 */
208 	if (Flags & AC_U)
209 		return head;
210 
211 	if ((up = NEW(struct user_list)) == NULL)
212 		errx(1, "malloc failed");
213 	up->next = head;
214 	(void)strncpy(up->name, name, sizeof (up->name) - 1);
215 	up->name[sizeof (up->name) - 1] = '\0';	/* paranoid! */
216 	up->secs = secs;
217 	Total += secs;
218 	return up;
219 }
220 
221 int
222 main(argc, argv)
223 	int	argc;
224 	char	**argv;
225 {
226 	FILE *fp;
227 	int c;
228 
229 	(void) setlocale(LC_TIME, "");
230 
231 	fp = NULL;
232 	while ((c = getopt(argc, argv, "Dc:dpt:w:")) != -1) {
233 		switch (c) {
234 #ifdef DEBUG
235 		case 'D':
236 			Debug++;
237 			break;
238 #endif
239 		case 'c':
240 #ifdef CONSOLE_TTY
241 			Console = optarg;
242 #else
243 			usage();		/* XXX */
244 #endif
245 			break;
246 		case 'd':
247 			Flags |= AC_D;
248 			break;
249 		case 'p':
250 			Flags |= AC_P;
251 			break;
252 		case 't':			/* only do specified ttys */
253 			add_tty(optarg);
254 			break;
255 		case 'w':
256 			fp = file(optarg);
257 			break;
258 		case '?':
259 		default:
260 			usage();
261 			break;
262 		}
263 	}
264 	if (optind < argc) {
265 		/*
266 		 * initialize user list
267 		 */
268 		for (; optind < argc; optind++) {
269 			Users = update_user(Users, argv[optind], 0L);
270 		}
271 		Flags |= AC_U;			/* freeze user list */
272 	}
273 	if (Flags & AC_D)
274 		Flags &= ~AC_P;
275 	if (fp == NULL) {
276 		/*
277 		 * if _PATH_WTMP does not exist, exit quietly
278 		 */
279 		if (access(_PATH_WTMP, 0) != 0 && errno == ENOENT)
280 			return 0;
281 
282 		fp = file(_PATH_WTMP);
283 	}
284 	ac(fp);
285 
286 	return 0;
287 }
288 
289 /*
290  * print login time in decimal hours
291  */
292 void
293 show(name, secs)
294 	char *name;
295 	time_t secs;
296 {
297 	(void)printf("\t%-*s %8.2f\n", UT_NAMESIZE, name,
298 	    ((double)secs / 3600));
299 }
300 
301 void
302 show_users(list)
303 	struct user_list *list;
304 {
305 	struct user_list *lp;
306 
307 	for (lp = list; lp; lp = lp->next)
308 		show(lp->name, lp->secs);
309 }
310 
311 /*
312  * print total login time for 24hr period in decimal hours
313  */
314 void
315 show_today(users, logins, secs)
316 	struct user_list *users;
317 	struct utmp_list *logins;
318 	time_t secs;
319 {
320 	struct user_list *up;
321 	struct utmp_list *lp;
322 	char date[64];
323 	time_t yesterday = secs - 1;
324 	static int d_first = -1;
325 
326 	if (d_first < 0)
327 		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
328 	(void)strftime(date, sizeof (date),
329 		       d_first ? "%e %b  total" : "%b %e  total",
330 		       localtime(&yesterday));
331 
332 	/* restore the missing second */
333 	yesterday++;
334 
335 	for (lp = logins; lp != NULL; lp = lp->next) {
336 		secs = yesterday - lp->usr.ut_time;
337 		Users = update_user(Users, lp->usr.ut_name, secs);
338 		lp->usr.ut_time = yesterday;	/* as if they just logged in */
339 	}
340 	secs = 0;
341 	for (up = users; up != NULL; up = up->next) {
342 		secs += up->secs;
343 		up->secs = 0;			/* for next day */
344 	}
345  	if (secs)
346 		(void)printf("%s %11.2f\n", date, ((double)secs / 3600));
347 }
348 
349 /*
350  * log a user out and update their times.
351  * if ut_line is "~", we log all users out as the system has
352  * been shut down.
353  */
354 struct utmp_list *
355 log_out(head, up)
356 	struct utmp_list *head;
357 	struct utmp *up;
358 {
359 	struct utmp_list *lp, *lp2, *tlp;
360 	time_t secs;
361 
362 	for (lp = head, lp2 = NULL; lp != NULL; )
363 		if (*up->ut_line == '~' || strncmp(lp->usr.ut_line, up->ut_line,
364 		    sizeof (up->ut_line)) == 0) {
365 			secs = up->ut_time - lp->usr.ut_time;
366 			Users = update_user(Users, lp->usr.ut_name, secs);
367 #ifdef DEBUG
368 			if (Debug)
369 				printf("%-.*s %-.*s: %-.*s logged out (%2d:%02d:%02d)\n",
370 				    19, ctime(&up->ut_time),
371 				    sizeof (lp->usr.ut_line), lp->usr.ut_line,
372 				    sizeof (lp->usr.ut_name), lp->usr.ut_name,
373 				    secs / 3600, (secs % 3600) / 60, secs % 60);
374 #endif
375 			/*
376 			 * now lose it
377 			 */
378 			tlp = lp;
379 			lp = lp->next;
380 			if (tlp == head)
381 				head = lp;
382 			else if (lp2 != NULL)
383 				lp2->next = lp;
384 			free(tlp);
385 		} else {
386 			lp2 = lp;
387 			lp = lp->next;
388 		}
389 	return head;
390 }
391 
392 
393 /*
394  * if do_tty says ok, login a user
395  */
396 struct utmp_list *
397 log_in(head, up)
398 	struct utmp_list *head;
399 	struct utmp *up;
400 {
401 	struct utmp_list *lp;
402 
403 	/*
404 	 * this could be a login. if we're not dealing with
405 	 * the console name, say it is.
406 	 *
407 	 * If we are, and if ut_host==":0.0" we know that it
408 	 * isn't a real login. _But_ if we have not yet recorded
409 	 * someone being logged in on Console - due to the wtmp
410 	 * file starting after they logged in, we'll pretend they
411 	 * logged in, at the start of the wtmp file.
412 	 */
413 
414 #ifdef CONSOLE_TTY
415 	if (up->ut_host[0] == ':') {
416 		/*
417 		 * SunOS 4.0.2 does not treat ":0.0" as special but we
418 		 * do.
419 		 */
420 		if (on_console(head))
421 			return head;
422 		/*
423 		 * ok, no recorded login, so they were here when wtmp
424 		 * started!  Adjust ut_time!
425 		 */
426 		up->ut_time = FirstTime;
427 		/*
428 		 * this allows us to pick the right logout
429 		 */
430 		(void)strncpy(up->ut_line, Console, sizeof (up->ut_line) - 1);
431 		up->ut_line[sizeof (up->ut_line) - 1] = '\0'; /* paranoid! */
432 	}
433 #endif
434 	/*
435 	 * If we are doing specified ttys only, we ignore
436 	 * anything else.
437 	 */
438 	if (Flags & AC_T)
439 		if (!do_tty(up->ut_line))
440 			return head;
441 
442 	/*
443 	 * go ahead and log them in
444 	 */
445 	if ((lp = NEW(struct utmp_list)) == NULL)
446 		errx(1, "malloc failed");
447 	lp->next = head;
448 	head = lp;
449 	memmove((char *)&lp->usr, (char *)up, sizeof (struct utmp));
450 #ifdef DEBUG
451 	if (Debug) {
452 		printf("%-.*s %-.*s: %-.*s logged in", 19,
453 		    ctime(&lp->usr.ut_time), sizeof (up->ut_line),
454 		       up->ut_line, sizeof (up->ut_name), up->ut_name);
455 		if (*up->ut_host)
456 			printf(" (%-.*s)", sizeof (up->ut_host), up->ut_host);
457 		putchar('\n');
458 	}
459 #endif
460 	return head;
461 }
462 
463 int
464 ac(fp)
465 	FILE	*fp;
466 {
467 	struct utmp_list *lp, *head = NULL;
468 	struct utmp usr;
469 	struct tm *ltm;
470 	time_t secs;
471 	int day = -1;
472 
473 	while (fread((char *)&usr, sizeof(usr), 1, fp) == 1) {
474 		if (!FirstTime)
475 			FirstTime = usr.ut_time;
476 		if (Flags & AC_D) {
477 			ltm = localtime(&usr.ut_time);
478 			if (day >= 0 && day != ltm->tm_yday) {
479 				day = ltm->tm_yday;
480 				/*
481 				 * print yesterday's total
482 				 */
483 				secs = usr.ut_time;
484 				secs -= ltm->tm_sec;
485 				secs -= 60 * ltm->tm_min;
486 				secs -= 3600 * ltm->tm_hour;
487 				show_today(Users, head, secs);
488 			} else
489 				day = ltm->tm_yday;
490 		}
491 		switch(*usr.ut_line) {
492 		case '|':
493 			secs = usr.ut_time;
494 			break;
495 		case '{':
496 			secs -= usr.ut_time;
497 			/*
498 			 * adjust time for those logged in
499 			 */
500 			for (lp = head; lp != NULL; lp = lp->next)
501 				lp->usr.ut_time -= secs;
502 			break;
503 		case '~':			/* reboot or shutdown */
504 			head = log_out(head, &usr);
505 			FirstTime = usr.ut_time; /* shouldn't be needed */
506 			break;
507 		default:
508 			/*
509 			 * if they came in on tty[p-sP-S]*, then it is only
510 			 * a login session if the ut_host field is non-empty
511 			 */
512 			if (*usr.ut_name) {
513 				if (strncmp(usr.ut_line, "tty", 3) != 0 ||
514 				    strchr("pqrsPQRS", usr.ut_line[3]) == 0 ||
515 				    *usr.ut_host != '\0')
516 					head = log_in(head, &usr);
517 			} else
518 				head = log_out(head, &usr);
519 			break;
520 		}
521 	}
522 	(void)fclose(fp);
523 	if (!(Flags & AC_W))
524 		usr.ut_time = time((time_t *)0);
525 	(void)strcpy(usr.ut_line, "~");
526 
527 	if (Flags & AC_D) {
528 		ltm = localtime(&usr.ut_time);
529 		if (day >= 0 && day != ltm->tm_yday) {
530 			/*
531 			 * print yesterday's total
532 			 */
533 			secs = usr.ut_time;
534 			secs -= ltm->tm_sec;
535 			secs -= 60 * ltm->tm_min;
536 			secs -= 3600 * ltm->tm_hour;
537 			show_today(Users, head, secs);
538 		}
539 	}
540 	/*
541 	 * anyone still logged in gets time up to now
542 	 */
543 	head = log_out(head, &usr);
544 
545 	if (Flags & AC_D)
546 		show_today(Users, head, time((time_t *)0));
547 	else {
548 		if (Flags & AC_P)
549 			show_users(Users);
550 		show("total", Total);
551 	}
552 	return 0;
553 }
554 
555 void
556 usage()
557 {
558 	(void)fprintf(stderr,
559 #ifdef CONSOLE_TTY
560 	    "ac [-dp] [-c console] [-t tty] [-w wtmp] [users ...]\n");
561 #else
562 	    "ac [-dp] [-t tty] [-w wtmp] [users ...]\n");
563 #endif
564 	exit(1);
565 }
566