/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1994 Christopher G. Demetriou
* Copyright (c) 1994 Simon J. Gerraty
* Copyright (c) 2012 Ed Schouten <ed@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/queue.h>
#include <sys/time.h>
#include <err.h>
#include <errno.h>
#include <langinfo.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <timeconv.h>
#include <unistd.h>
#include <utmpx.h>
/*
* this is for our list of currently logged in sessions
*/
struct utmpx_entry {
SLIST_ENTRY(utmpx_entry) next;
char user[sizeof(((struct utmpx *)0)->ut_user)];
char id[sizeof(((struct utmpx *)0)->ut_id)];
#ifdef CONSOLE_TTY
char line[sizeof(((struct utmpx *)0)->ut_line)];
#endif
struct timeval time;
};
/*
* this is for our list of users that are accumulating time.
*/
struct user_entry {
SLIST_ENTRY(user_entry) next;
char user[sizeof(((struct utmpx *)0)->ut_user)];
struct timeval time;
};
/*
* this is for chosing whether to ignore a login
*/
struct tty_entry {
SLIST_ENTRY(tty_entry) next;
char line[sizeof(((struct utmpx *)0)->ut_line) + 2];
size_t len;
int ret;
};
/*
* globals - yes yuk
*/
#ifdef CONSOLE_TTY
static const char *Console = CONSOLE_TTY;
#endif
static struct timeval Total = { 0, 0 };
static struct timeval FirstTime = { 0, 0 };
static int Flags = 0;
static SLIST_HEAD(, utmpx_entry) CurUtmpx = SLIST_HEAD_INITIALIZER(CurUtmpx);
static SLIST_HEAD(, user_entry) Users = SLIST_HEAD_INITIALIZER(Users);
static SLIST_HEAD(, tty_entry) Ttys = SLIST_HEAD_INITIALIZER(Ttys);
#define AC_W 1 /* not _PATH_WTMP */
#define AC_D 2 /* daily totals (ignore -p) */
#define AC_P 4 /* per-user totals */
#define AC_U 8 /* specified users only */
#define AC_T 16 /* specified ttys only */
static void ac(const char *);
static void usage(void);
static void
add_tty(const char *line)
{
struct tty_entry *tp;
char *rcp;
Flags |= AC_T;
if ((tp = malloc(sizeof(*tp))) == NULL)
errx(1, "malloc failed");
tp->len = 0; /* full match */
tp->ret = 1; /* do if match */
if (*line == '!') { /* don't do if match */
tp->ret = 0;
line++;
}
strlcpy(tp->line, line, sizeof(tp->line));
/* Wildcard. */
if ((rcp = strchr(tp->line, '*')) != NULL) {
*rcp = '\0';
/* Match len bytes only. */
tp->len = strlen(tp->line);
}
SLIST_INSERT_HEAD(&Ttys, tp, next);
}
/*
* should we process the named tty?
*/
static int
do_tty(const char *line)
{
struct tty_entry *tp;
int def_ret = 0;
SLIST_FOREACH(tp, &Ttys, next) {
if (tp->ret == 0) /* specific don't */
def_ret = 1; /* default do */
if (tp->len != 0) {
if (strncmp(line, tp->line, tp->len) == 0)
return tp->ret;
} else {
if (strncmp(line, tp->line, sizeof(tp->line)) == 0)
return tp->ret;
}
}
return (def_ret);
}
#ifdef CONSOLE_TTY
/*
* is someone logged in on Console?
*/
static int
on_console(void)
{
struct utmpx_entry *up;
SLIST_FOREACH(up, &CurUtmpx, next)
if (strcmp(up->line, Console) == 0)
return (1);
return (0);
}
#endif
/*
* Update user's login time.
* If no entry for this user is found, a new entry is inserted into the
* list alphabetically.
*/
static void
update_user(const char *user, struct timeval secs)
{
struct user_entry *up, *aup;
int c;
aup = NULL;
SLIST_FOREACH(up, &Users, next) {
c = strcmp(up->user, user);
if (c == 0) {
timeradd(&up->time, &secs, &up->time);
timeradd(&Total, &secs, &Total);
return;
} else if (c > 0)
break;
aup = up;
}
/*
* not found so add new user unless specified users only
*/
if (Flags & AC_U)
return;
if ((up = malloc(sizeof(*up))) == NULL)
errx(1, "malloc failed");
if (aup == NULL)
SLIST_INSERT_HEAD(&Users, up, next);
else
SLIST_INSERT_AFTER(aup, up, next);
strlcpy(up->user, user, sizeof(up->user));
up->time = secs;
timeradd(&Total, &secs, &Total);
}
int
main(int argc, char *argv[])
{
const char *wtmpf = NULL;
int c;
(void) setlocale(LC_TIME, "");
while ((c = getopt(argc, argv, "c:dpt:w:")) != -1) {
switch (c) {
case 'c':
#ifdef CONSOLE_TTY
Console = optarg;
#else
usage(); /* XXX */
#endif
break;
case 'd':
Flags |= AC_D;
break;
case 'p':
Flags |= AC_P;
break;
case 't': /* only do specified ttys */
add_tty(optarg);
break;
case 'w':
Flags |= AC_W;
wtmpf = optarg;
break;
case '?':
default:
usage();
break;
}
}
if (optind < argc) {
/*
* initialize user list
*/
for (; optind < argc; optind++) {
update_user(argv[optind], (struct timeval){ 0, 0 });
}
Flags |= AC_U; /* freeze user list */
}
if (Flags & AC_D)
Flags &= ~AC_P;
ac(wtmpf);
return (0);
}
/*
* print login time in decimal hours
*/
static void
show(const char *user, struct timeval secs)
{
(void)printf("\t%-*s %8.2f\n",
(int)sizeof(((struct user_entry *)0)->user), user,
(double)secs.tv_sec / 3600);
}
static void
show_users(void)
{
struct user_entry *lp;
SLIST_FOREACH(lp, &Users, next)
show(lp->user, lp->time);
}
/*
* print total login time for 24hr period in decimal hours
*/
static void
show_today(struct timeval today)
{
struct user_entry *up;
struct utmpx_entry *lp;
char date[64];
struct timeval diff, total = { 0, 0 }, usec = { 0, 1 }, yesterday;
static int d_first = -1;
if (d_first < 0)
d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
timersub(&today, &usec, &yesterday);
(void)strftime(date, sizeof(date),
d_first ? "%e %b total" : "%b %e total",
localtime(&yesterday.tv_sec));
SLIST_FOREACH(lp, &CurUtmpx, next) {
timersub(&today, &lp->time, &diff);
update_user(lp->user, diff);
/* As if they just logged in. */
lp->time = today;
}
SLIST_FOREACH(up, &Users, next) {
timeradd(&total, &up->time, &total);
/* For next day. */
timerclear(&up->time);
}
if (timerisset(&total))
(void)printf("%s %11.2f\n", date, (double)total.tv_sec / 3600);
}
/*
* Log a user out and update their times.
* If ut_type is BOOT_TIME or SHUTDOWN_TIME, we log all users out as the
* system has been shut down.
*/
static void
log_out(const struct utmpx *up)
{
struct utmpx_entry *lp, *lp2, *tlp;
struct timeval secs;
for (lp = SLIST_FIRST(&CurUtmpx), lp2 = NULL; lp != NULL;)
if (up->ut_type == BOOT_TIME || up->ut_type == SHUTDOWN_TIME ||
(up->ut_type == DEAD_PROCESS &&
memcmp(lp->id, up->ut_id, sizeof(up->ut_id)) == 0)) {
timersub(&up->ut_tv, &lp->time, &secs);
update_user(lp->user, secs);
/*
* now lose it
*/
tlp = lp;
lp = SLIST_NEXT(lp, next);
if (lp2 == NULL)
SLIST_REMOVE_HEAD(&CurUtmpx, next);
else
SLIST_REMOVE_AFTER(lp2, next);
free(tlp);
} else {
lp2 = lp;
lp = SLIST_NEXT(lp, next);
}
}
/*
* if do_tty says ok, login a user
*/
static void
log_in(struct utmpx *up)
{
struct utmpx_entry *lp;
/*
* this could be a login. if we're not dealing with
* the console name, say it is.
*
* If we are, and if ut_host==":0.0" we know that it
* isn't a real login. _But_ if we have not yet recorded
* someone being logged in on Console - due to the wtmp
* file starting after they logged in, we'll pretend they
* logged in, at the start of the wtmp file.
*/
#ifdef CONSOLE_TTY
if (up->ut_host[0] == ':') {
/*
* SunOS 4.0.2 does not treat ":0.0" as special but we
* do.
*/
if (on_console())
return;
/*
* ok, no recorded login, so they were here when wtmp
* started! Adjust ut_time!
*/
up->ut_tv = FirstTime;
/*
* this allows us to pick the right logout
*/
strlcpy(up->ut_line, Console, sizeof(up->ut_line));
}
#endif
/*
* If we are doing specified ttys only, we ignore
* anything else.
*/
if (Flags & AC_T && !do_tty(up->ut_line))
return;
/*
* go ahead and log them in
*/
if ((lp = malloc(sizeof(*lp))) == NULL)
errx(1, "malloc failed");
SLIST_INSERT_HEAD(&CurUtmpx, lp, next);
strlcpy(lp->user, up->ut_user, sizeof(lp->user));
memcpy(lp->id, up->ut_id, sizeof(lp->id));
#ifdef CONSOLE_TTY
memcpy(lp->line, up->ut_line, sizeof(lp->line));
#endif
lp->time = up->ut_tv;
}
static void
ac(const char *file)
{
struct utmpx_entry *lp;
struct utmpx *usr, usht;
struct tm *ltm;
struct timeval prev_secs, ut_timecopy, secs, clock_shift, now;
int day, rfound;
day = -1;
timerclear(&prev_secs); /* Minimum acceptable date == 1970. */
timerclear(&secs);
timerclear(&clock_shift);
rfound = 0;
if (setutxdb(UTXDB_LOG, file) != 0)
err(1, "%s", file);
while ((usr = getutxent()) != NULL) {
rfound++;
ut_timecopy = usr->ut_tv;
/* Don't let the time run backwards. */
if (timercmp(&ut_timecopy, &prev_secs, <))
ut_timecopy = prev_secs;
prev_secs = ut_timecopy;
if (!timerisset(&FirstTime))
FirstTime = ut_timecopy;
if (Flags & AC_D) {
ltm = localtime(&ut_timecopy.tv_sec);
if (day >= 0 && day != ltm->tm_yday) {
day = ltm->tm_yday;
/*
* print yesterday's total
*/
secs = ut_timecopy;
secs.tv_sec -= ltm->tm_sec;
secs.tv_sec -= 60 * ltm->tm_min;
secs.tv_sec -= 3600 * ltm->tm_hour;
secs.tv_usec = 0;
show_today(secs);
} else
day = ltm->tm_yday;
}
switch(usr->ut_type) {
case OLD_TIME:
clock_shift = ut_timecopy;
break;
case NEW_TIME:
timersub(&clock_shift, &ut_timecopy, &clock_shift);
/*
* adjust time for those logged in
*/
SLIST_FOREACH(lp, &CurUtmpx, next)
timersub(&lp->time, &clock_shift, &lp->time);
break;
case BOOT_TIME:
case SHUTDOWN_TIME:
log_out(usr);
FirstTime = ut_timecopy; /* shouldn't be needed */
break;
case USER_PROCESS:
/*
* If they came in on pts/..., then it is only
* a login session if the ut_host field is non-empty.
*/
if (strncmp(usr->ut_line, "pts/", 4) != 0 ||
*usr->ut_host != '\0')
log_in(usr);
break;
case DEAD_PROCESS:
log_out(usr);
break;
}
}
endutxent();
(void)gettimeofday(&now, NULL);
if (Flags & AC_W)
usht.ut_tv = ut_timecopy;
else
usht.ut_tv = now;
usht.ut_type = SHUTDOWN_TIME;
if (Flags & AC_D) {
ltm = localtime(&ut_timecopy.tv_sec);
if (day >= 0 && day != ltm->tm_yday) {
/*
* print yesterday's total
*/
secs = ut_timecopy;
secs.tv_sec -= ltm->tm_sec;
secs.tv_sec -= 60 * ltm->tm_min;
secs.tv_sec -= 3600 * ltm->tm_hour;
secs.tv_usec = 0;
show_today(secs);
}
}
/*
* anyone still logged in gets time up to now
*/
log_out(&usht);
if (Flags & AC_D)
show_today(now);
else {
if (Flags & AC_P)
show_users();
show("total", Total);
}
}
static void
usage(void)
{
(void)fprintf(stderr,
#ifdef CONSOLE_TTY
"ac [-dp] [-c console] [-t tty] [-w wtmp] [users ...]\n");
#else
"ac [-dp] [-t tty] [-w wtmp] [users ...]\n");
#endif
exit(1);
}
