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[dragonfly.git] / usr.sbin / ac / ac.c
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1 /*
2 * Copyright (c) 1994 Christopher G. Demetriou.
3 * @(#)Copyright (c) 1994, Simon J. Gerraty.
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.
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 1.6 2004/03/20 17:46:47 cpressey Exp $
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>
34 * this is for our list of currently logged in sessions
36 struct utmp_list {
37 struct utmp_list *next;
38 struct utmp usr;
42 * this is for our list of users that are accumulating time.
44 struct user_list {
45 struct user_list *next;
46 char name[UT_NAMESIZE+1];
47 time_t secs;
51 * this is for chosing whether to ignore a login
53 struct tty_list {
54 struct tty_list *next;
55 char name[UT_LINESIZE+3];
56 int len;
57 int ret;
61 * globals - yes yuk
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;
72 #define NEW(type) (type *)malloc(sizeof(type))
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 */
80 #ifdef DEBUG
81 static int Debug = 0;
82 #endif
84 int main(int, char **);
85 int ac(FILE *);
86 struct tty_list *add_tty(char *);
87 int do_tty(char *);
88 FILE *file(char *);
89 struct utmp_list *log_in(struct utmp_list *, struct utmp *);
90 struct utmp_list *log_out(struct utmp_list *, struct utmp *);
91 int on_console(struct utmp_list *);
92 void show(char *, time_t);
93 void show_today(struct user_list *, struct utmp_list *,
94 time_t);
95 void show_users(struct user_list *);
96 struct user_list *update_user(struct user_list *, char *, time_t);
97 void usage(void);
100 * open wtmp or die
102 FILE *
103 file(char *name)
105 FILE *fp;
107 if ((fp = fopen(name, "r")) == NULL)
108 err(1, "%s", name);
109 /* in case we want to discriminate */
110 if (strcmp(_PATH_WTMP, name))
111 Flags |= AC_W;
112 return fp;
115 struct tty_list *
116 add_tty(char *name)
118 struct tty_list *tp;
119 char *rcp;
121 Flags |= AC_T;
123 if ((tp = NEW(struct tty_list)) == NULL)
124 errx(1, "malloc failed");
125 tp->len = 0; /* full match */
126 tp->ret = 1; /* do if match */
127 if (*name == '!') { /* don't do if match */
128 tp->ret = 0;
129 name++;
131 strncpy(tp->name, name, sizeof(tp->name) - 1);
132 tp->name[sizeof(tp->name) - 1] = '\0';
133 if ((rcp = strchr(tp->name, '*')) != NULL) { /* wild card */
134 *rcp = '\0';
135 tp->len = strlen(tp->name); /* match len bytes only */
137 tp->next = Ttys;
138 Ttys = tp;
139 return Ttys;
143 * should we process the named tty?
146 do_tty(char *name)
148 struct tty_list *tp;
149 int def_ret = 0;
151 for (tp = Ttys; tp != NULL; tp = tp->next) {
152 if (tp->ret == 0) /* specific don't */
153 def_ret = 1; /* default do */
154 if (tp->len != 0) {
155 if (strncmp(name, tp->name, tp->len) == 0)
156 return tp->ret;
157 } else {
158 if (strncmp(name, tp->name, sizeof(tp->name)) == 0)
159 return tp->ret;
162 return def_ret;
165 #ifdef CONSOLE_TTY
167 * is someone logged in on Console?
170 on_console(struct utmp_list *head)
172 struct utmp_list *up;
174 for (up = head; up; up = up->next) {
175 if (strncmp(up->usr.ut_line, Console,
176 sizeof(up->usr.ut_line)) == 0)
177 return 1;
179 return 0;
181 #endif
184 * update user's login time
186 struct user_list *
187 update_user(struct user_list *head, char *name, time_t secs)
189 struct user_list *up;
191 for (up = head; up != NULL; up = up->next) {
192 if (strncmp(up->name, name, UT_NAMESIZE) == 0) {
193 up->secs += secs;
194 Total += secs;
195 return head;
199 * not found so add new user unless specified users only
201 if (Flags & AC_U)
202 return head;
204 if ((up = NEW(struct user_list)) == NULL)
205 errx(1, "malloc failed");
206 up->next = head;
207 strncpy(up->name, name, sizeof(up->name) - 1);
208 up->name[sizeof(up->name) - 1] = '\0'; /* paranoid! */
209 up->secs = secs;
210 Total += secs;
211 return up;
215 main(int argc, char **argv)
217 FILE *fp;
218 int c;
220 setlocale(LC_TIME, "");
222 fp = NULL;
223 while ((c = getopt(argc, argv, "Dc:dpt:w:")) != -1) {
224 switch (c) {
225 #ifdef DEBUG
226 case 'D':
227 Debug++;
228 break;
229 #endif
230 case 'c':
231 #ifdef CONSOLE_TTY
232 Console = optarg;
233 #else
234 usage(); /* XXX */
235 #endif
236 break;
237 case 'd':
238 Flags |= AC_D;
239 break;
240 case 'p':
241 Flags |= AC_P;
242 break;
243 case 't': /* only do specified ttys */
244 add_tty(optarg);
245 break;
246 case 'w':
247 fp = file(optarg);
248 break;
249 case '?':
250 default:
251 usage();
252 break;
255 if (optind < argc) {
257 * initialize user list
259 for (; optind < argc; optind++) {
260 Users = update_user(Users, argv[optind], 0L);
262 Flags |= AC_U; /* freeze user list */
264 if (Flags & AC_D)
265 Flags &= ~AC_P;
266 if (fp == NULL) {
268 * if _PATH_WTMP does not exist, exit quietly
270 if (access(_PATH_WTMP, 0) != 0 && errno == ENOENT)
271 return 0;
273 fp = file(_PATH_WTMP);
275 ac(fp);
277 return 0;
281 * print login time in decimal hours
283 void
284 show(char *name, time_t secs)
286 printf("\t%-*s %8.2f\n", UT_NAMESIZE, name,
287 ((double)secs / 3600));
290 void
291 show_users(struct user_list *list)
293 struct user_list *lp;
295 for (lp = list; lp; lp = lp->next)
296 show(lp->name, lp->secs);
300 * print total login time for 24hr period in decimal hours
302 void
303 show_today(struct user_list *users, struct utmp_list *logins, time_t secs)
305 struct user_list *up;
306 struct utmp_list *lp;
307 char date[64];
308 time_t yesterday = secs - 1;
309 static int d_first = -1;
311 if (d_first < 0)
312 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
313 strftime(date, sizeof(date),
314 d_first ? "%e %b total" : "%b %e total",
315 localtime(&yesterday));
317 /* restore the missing second */
318 yesterday++;
320 for (lp = logins; lp != NULL; lp = lp->next) {
321 secs = yesterday - lp->usr.ut_time;
322 Users = update_user(Users, lp->usr.ut_name, secs);
323 lp->usr.ut_time = yesterday; /* as if they just logged in */
325 secs = 0;
326 for (up = users; up != NULL; up = up->next) {
327 secs += up->secs;
328 up->secs = 0; /* for next day */
330 if (secs)
331 printf("%s %11.2f\n", date, ((double)secs / 3600));
335 * log a user out and update their times.
336 * if ut_line is "~", we log all users out as the system has
337 * been shut down.
339 struct utmp_list *
340 log_out(struct utmp_list *head, struct utmp *up)
342 struct utmp_list *lp, *lp2, *tlp;
343 time_t secs;
345 for (lp = head, lp2 = NULL; lp != NULL; )
346 if (*up->ut_line == '~' || strncmp(lp->usr.ut_line, up->ut_line,
347 sizeof(up->ut_line)) == 0) {
348 secs = up->ut_time - lp->usr.ut_time;
349 Users = update_user(Users, lp->usr.ut_name, secs);
350 #ifdef DEBUG
351 if (Debug)
352 printf("%-.*s %-.*s: %-.*s logged out (%2d:%02d:%02d)\n",
353 19, ctime(&up->ut_time),
354 sizeof(lp->usr.ut_line), lp->usr.ut_line,
355 sizeof(lp->usr.ut_name), lp->usr.ut_name,
356 secs / 3600, (secs % 3600) / 60, secs % 60);
357 #endif
359 * now lose it
361 tlp = lp;
362 lp = lp->next;
363 if (tlp == head)
364 head = lp;
365 else if (lp2 != NULL)
366 lp2->next = lp;
367 free(tlp);
368 } else {
369 lp2 = lp;
370 lp = lp->next;
372 return head;
377 * if do_tty says ok, login a user
379 struct utmp_list *
380 log_in(struct utmp_list *head, struct utmp *up)
382 struct utmp_list *lp;
385 * this could be a login. if we're not dealing with
386 * the console name, say it is.
388 * If we are, and if ut_host==":0.0" we know that it
389 * isn't a real login. _But_ if we have not yet recorded
390 * someone being logged in on Console - due to the wtmp
391 * file starting after they logged in, we'll pretend they
392 * logged in, at the start of the wtmp file.
395 #ifdef CONSOLE_TTY
396 if (up->ut_host[0] == ':') {
398 * SunOS 4.0.2 does not treat ":0.0" as special but we
399 * do.
401 if (on_console(head))
402 return head;
404 * ok, no recorded login, so they were here when wtmp
405 * started! Adjust ut_time!
407 up->ut_time = FirstTime;
409 * this allows us to pick the right logout
411 strncpy(up->ut_line, Console, sizeof(up->ut_line) - 1);
412 up->ut_line[sizeof(up->ut_line) - 1] = '\0'; /* paranoid! */
414 #endif
416 * If we are doing specified ttys only, we ignore
417 * anything else.
419 if (Flags & AC_T)
420 if (!do_tty(up->ut_line))
421 return head;
424 * go ahead and log them in
426 if ((lp = NEW(struct utmp_list)) == NULL)
427 errx(1, "malloc failed");
428 lp->next = head;
429 head = lp;
430 memmove((char *)&lp->usr, (char *)up, sizeof(struct utmp));
431 #ifdef DEBUG
432 if (Debug) {
433 printf("%-.*s %-.*s: %-.*s logged in", 19,
434 ctime(&lp->usr.ut_time), sizeof(up->ut_line),
435 up->ut_line, sizeof(up->ut_name), up->ut_name);
436 if (*up->ut_host)
437 printf(" (%-.*s)", sizeof(up->ut_host), up->ut_host);
438 putchar('\n');
440 #endif
441 return head;
445 ac(FILE *fp)
447 struct utmp_list *lp, *head = NULL;
448 struct utmp usr;
449 struct tm *ltm;
450 time_t secs;
451 int day = -1;
453 while (fread((char *)&usr, sizeof(usr), 1, fp) == 1) {
454 if (!FirstTime)
455 FirstTime = usr.ut_time;
456 if (Flags & AC_D) {
457 ltm = localtime(&usr.ut_time);
458 if (day >= 0 && day != ltm->tm_yday) {
459 day = ltm->tm_yday;
461 * print yesterday's total
463 secs = usr.ut_time;
464 secs -= ltm->tm_sec;
465 secs -= 60 * ltm->tm_min;
466 secs -= 3600 * ltm->tm_hour;
467 show_today(Users, head, secs);
468 } else
469 day = ltm->tm_yday;
471 switch(*usr.ut_line) {
472 case '|':
473 secs = usr.ut_time;
474 break;
475 case '{':
476 secs -= usr.ut_time;
478 * adjust time for those logged in
480 for (lp = head; lp != NULL; lp = lp->next)
481 lp->usr.ut_time -= secs;
482 break;
483 case '~': /* reboot or shutdown */
484 head = log_out(head, &usr);
485 FirstTime = usr.ut_time; /* shouldn't be needed */
486 break;
487 default:
489 * if they came in on tty[p-sP-S]*, then it is only
490 * a login session if the ut_host field is non-empty
492 if (*usr.ut_name) {
493 if (strncmp(usr.ut_line, "tty", 3) != 0 ||
494 strchr("pqrsPQRS", usr.ut_line[3]) == 0 ||
495 *usr.ut_host != '\0')
496 head = log_in(head, &usr);
497 } else
498 head = log_out(head, &usr);
499 break;
502 fclose(fp);
503 if (!(Flags & AC_W))
504 usr.ut_time = time(NULL);
505 strcpy(usr.ut_line, "~");
507 if (Flags & AC_D) {
508 ltm = localtime(&usr.ut_time);
509 if (day >= 0 && day != ltm->tm_yday) {
511 * print yesterday's total
513 secs = usr.ut_time;
514 secs -= ltm->tm_sec;
515 secs -= 60 * ltm->tm_min;
516 secs -= 3600 * ltm->tm_hour;
517 show_today(Users, head, secs);
521 * anyone still logged in gets time up to now
523 head = log_out(head, &usr);
525 if (Flags & AC_D)
526 show_today(Users, head, time(NULL));
527 else {
528 if (Flags & AC_P)
529 show_users(Users);
530 show("total", Total);
532 return 0;
535 void
536 usage(void)
538 fprintf(stderr,
539 #ifdef CONSOLE_TTY
540 "ac [-dp] [-c console] [-t tty] [-w wtmp] [users ...]\n");
541 #else
542 "ac [-dp] [-t tty] [-w wtmp] [users ...]\n");
543 #endif
544 exit(1);