OpenBSD-4.6/usr.sbin/ac/ac.c
/*
* Copyright (c) 1994 Christopher G. Demetriou.
* @(#)Copyright (c) 1994, Simon J. Gerraty.
*
* This is free software. It comes with NO WARRANTY.
* Permission to use, modify and distribute this source code
* is granted subject to the following conditions.
* 1/ that the above copyright notice and this notice
* are preserved in all copies and that due credit be given
* to the author.
* 2/ that any changes to this code are clearly commented
* as such so that the author does not get blamed for bugs
* other than his own.
*/
#ifndef lint
static const char rcsid[] = "$OpenBSD: ac.c,v 1.19 2007/11/17 15:08:57 sobrado Exp $";
#endif
#include <sys/types.h>
#include <sys/file.h>
#include <sys/time.h>
#include <err.h>
#include <errno.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <utmp.h>
#include <unistd.h>
/*
* this is for our list of currently logged in sessions
*/
struct utmp_list {
struct utmp_list *next;
struct utmp usr;
};
/*
* this is for our list of users that are accumulating time.
*/
struct user_list {
struct user_list *next;
char name[UT_NAMESIZE+1];
time_t secs;
};
/*
* this is for chosing whether to ignore a login
*/
struct tty_list {
struct tty_list *next;
char name[UT_LINESIZE+3];
size_t len;
int ret;
};
/*
* globals - yes yuk
*/
#ifdef CONSOLE_TTY
static char *Console = CONSOLE_TTY;
#endif
static time_t Total = 0;
static time_t FirstTime = 0;
static int Flags = 0;
static struct user_list *Users = NULL;
static struct tty_list *Ttys = NULL;
#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 */
#ifdef DEBUG
static int Debug = 0;
#endif
int main(int, char **);
int ac(FILE *);
void add_tty(char *);
int do_tty(char *);
FILE *file(char *);
struct utmp_list *log_in(struct utmp_list *, struct utmp *);
struct utmp_list *log_out(struct utmp_list *, struct utmp *);
int on_console(struct utmp_list *);
void show(char *, time_t);
void show_today(struct user_list *, struct utmp_list *,
time_t);
void show_users(struct user_list *);
struct user_list *update_user(struct user_list *, char *, time_t);
void usage(void);
/*
* open wtmp or die
*/
FILE *
file(char *name)
{
FILE *fp;
if (strcmp(name, "-") == 0)
fp = stdin;
else if ((fp = fopen(name, "r")) == NULL)
err(1, "%s", name);
/* in case we want to discriminate */
if (strcmp(_PATH_WTMP, name))
Flags |= AC_W;
return fp;
}
void
add_tty(char *name)
{
struct tty_list *tp;
char *rcp;
Flags |= AC_T;
if ((tp = malloc(sizeof(struct tty_list))) == NULL)
err(1, "malloc");
tp->len = 0; /* full match */
tp->ret = 1; /* do if match */
if (*name == '!') { /* don't do if match */
tp->ret = 0;
name++;
}
strlcpy(tp->name, name, sizeof (tp->name));
if ((rcp = strchr(tp->name, '*')) != NULL) { /* wild card */
*rcp = '\0';
tp->len = strlen(tp->name); /* match len bytes only */
}
tp->next = Ttys;
Ttys = tp;
}
/*
* should we process the named tty?
*/
int
do_tty(char *name)
{
struct tty_list *tp;
int def_ret = 0;
for (tp = Ttys; tp != NULL; tp = tp->next) {
if (tp->ret == 0) /* specific don't */
def_ret = 1; /* default do */
if (tp->len != 0) {
if (strncmp(name, tp->name, tp->len) == 0)
return tp->ret;
} else {
if (strncmp(name, tp->name, sizeof (tp->name)) == 0)
return tp->ret;
}
}
return def_ret;
}
#ifdef CONSOLE_TTY
/*
* is someone logged in on Console?
*/
int
on_console(struct utmp_list *head)
{
struct utmp_list *up;
for (up = head; up; up = up->next) {
if (strncmp(up->usr.ut_line, Console,
sizeof (up->usr.ut_line)) == 0)
return 1;
}
return 0;
}
#endif
/*
* update user's login time
*/
struct user_list *
update_user(struct user_list *head, char *name, time_t secs)
{
struct user_list *up;
for (up = head; up != NULL; up = up->next) {
if (strncmp(up->name, name, sizeof (up->name) - 1) == 0) {
up->secs += secs;
Total += secs;
return head;
}
}
/*
* not found so add new user unless specified users only
*/
if (Flags & AC_U)
return head;
if ((up = malloc(sizeof(struct user_list))) == NULL)
err(1, "malloc");
up->next = head;
strlcpy(up->name, name, sizeof (up->name));
up->secs = secs;
Total += secs;
return up;
}
int
main(int argc, char *argv[])
{
FILE *fp;
int c;
fp = NULL;
while ((c = getopt(argc, argv, "Dc:dpt:w:")) != -1) {
switch (c) {
#ifdef DEBUG
case 'D':
Debug++;
break;
#endif
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':
fp = file(optarg);
break;
case '?':
default:
usage();
break;
}
}
if (optind < argc) {
/*
* initialize user list
*/
for (; optind < argc; optind++) {
Users = update_user(Users, argv[optind], 0L);
}
Flags |= AC_U; /* freeze user list */
}
if (Flags & AC_D)
Flags &= ~AC_P;
if (fp == NULL) {
/*
* if _PATH_WTMP does not exist, exit quietly
*/
if (access(_PATH_WTMP, 0) != 0 && errno == ENOENT)
return 0;
fp = file(_PATH_WTMP);
}
ac(fp);
return 0;
}
/*
* print login time in decimal hours
*/
void
show(char *name, time_t secs)
{
(void)printf("\t%-*s %8.2f\n", UT_NAMESIZE, name,
((double)secs / 3600));
}
void
show_users(struct user_list *list)
{
struct user_list *lp;
for (lp = list; lp; lp = lp->next)
show(lp->name, lp->secs);
}
/*
* print total login time for 24hr period in decimal hours
*/
void
show_today(struct user_list *users, struct utmp_list *logins, time_t secs)
{
struct user_list *up;
struct utmp_list *lp;
char date[64];
time_t yesterday = secs - 1;
(void)strftime(date, sizeof (date), "%b %e total",
localtime(&yesterday));
/* restore the missing second */
yesterday++;
for (lp = logins; lp != NULL; lp = lp->next) {
secs = yesterday - lp->usr.ut_time;
Users = update_user(Users, lp->usr.ut_name, secs);
lp->usr.ut_time = yesterday; /* as if they just logged in */
}
secs = 0;
for (up = users; up != NULL; up = up->next) {
secs += up->secs;
up->secs = 0; /* for next day */
}
if (secs)
(void)printf("%s %11.2f\n", date, ((double)secs / 3600));
}
/*
* log a user out and update their times.
* if ut_line is "~", we log all users out as the system has
* been shut down.
*/
struct utmp_list *
log_out(struct utmp_list *head, struct utmp *up)
{
struct utmp_list *lp, *lp2, *tlp;
time_t secs;
for (lp = head, lp2 = NULL; lp != NULL; )
if (*up->ut_line == '~' || strncmp(lp->usr.ut_line, up->ut_line,
sizeof (up->ut_line)) == 0) {
secs = up->ut_time - lp->usr.ut_time;
Users = update_user(Users, lp->usr.ut_name, secs);
#ifdef DEBUG
if (Debug)
printf("%-.*s %-.*s: %-.*s logged out (%2d:%02d:%02d)\n",
19, ctime(&up->ut_time),
sizeof (lp->usr.ut_line), lp->usr.ut_line,
sizeof (lp->usr.ut_name), lp->usr.ut_name,
secs / 3600, (secs % 3600) / 60, secs % 60);
#endif
/*
* now lose it
*/
tlp = lp;
lp = lp->next;
if (tlp == head)
head = lp;
else if (lp2 != NULL)
lp2->next = lp;
free(tlp);
} else {
lp2 = lp;
lp = lp->next;
}
return head;
}
/*
* if do_tty says ok, login a user
*/
struct utmp_list *
log_in(struct utmp_list *head, struct utmp *up)
{
struct utmp_list *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(head))
return head;
/*
* ok, no recorded login, so they were here when wtmp
* started! Adjust ut_time!
*/
up->ut_time = 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)
if (!do_tty(up->ut_line))
return head;
/*
* go ahead and log them in
*/
if ((lp = malloc(sizeof(struct utmp_list))) == NULL)
err(1, "malloc");
lp->next = head;
head = lp;
memmove((char *)&lp->usr, (char *)up, sizeof (struct utmp));
#ifdef DEBUG
if (Debug) {
printf("%-.*s %-.*s: %-.*s logged in", 19,
ctime(&lp->usr.ut_time), sizeof (up->ut_line),
up->ut_line, sizeof (up->ut_name), up->ut_name);
if (*up->ut_host)
printf(" (%-.*s)", sizeof (up->ut_host), up->ut_host);
putchar('\n');
}
#endif
return head;
}
int
ac(FILE *fp)
{
struct utmp_list *lp, *head = NULL;
struct utmp usr;
struct tm *ltm;
time_t secs = 0, prev = 0;
int day = -1;
while (fread((char *)&usr, sizeof(usr), 1, fp) == 1) {
if (!FirstTime)
FirstTime = usr.ut_time;
if (usr.ut_time < prev)
continue; /* broken record */
prev = usr.ut_time;
if (Flags & AC_D) {
ltm = localtime(&usr.ut_time);
if (day >= 0 && day != ltm->tm_yday) {
day = ltm->tm_yday;
/*
* print yesterday's total
*/
secs = usr.ut_time;
secs -= ltm->tm_sec;
secs -= 60 * ltm->tm_min;
secs -= 3600 * ltm->tm_hour;
show_today(Users, head, secs);
} else
day = ltm->tm_yday;
}
switch(*usr.ut_line) {
case '|':
secs = usr.ut_time;
break;
case '{':
secs -= usr.ut_time;
/*
* adjust time for those logged in
*/
for (lp = head; lp != NULL; lp = lp->next)
lp->usr.ut_time -= secs;
break;
case '~': /* reboot or shutdown */
head = log_out(head, &usr);
FirstTime = usr.ut_time; /* shouldn't be needed */
break;
default:
/*
* if they came in on a pseudo-tty, then it is only
* a login session if the ut_host field is non-empty
*/
if (*usr.ut_name) {
if (strncmp(usr.ut_line, "tty", 3) != 0 ||
strchr("pqrstuvwxyzPQRST", usr.ut_line[3]) != NULL ||
*usr.ut_host != '\0')
head = log_in(head, &usr);
} else
head = log_out(head, &usr);
break;
}
}
(void)fclose(fp);
if (!(Flags & AC_W))
usr.ut_time = time(NULL);
(void)strlcpy(usr.ut_line, "~", sizeof usr.ut_line);
if (Flags & AC_D) {
ltm = localtime(&usr.ut_time);
if (day >= 0 && day != ltm->tm_yday) {
/*
* print yesterday's total
*/
secs = usr.ut_time;
secs -= ltm->tm_sec;
secs -= 60 * ltm->tm_min;
secs -= 3600 * ltm->tm_hour;
show_today(Users, head, secs);
}
}
/*
* anyone still logged in gets time up to now
*/
head = log_out(head, &usr);
if (Flags & AC_D)
show_today(Users, head, time(NULL));
else {
if (Flags & AC_P)
show_users(Users);
show("total", Total);
}
return 0;
}
void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr, "usage: "
#ifdef CONSOLE_TTY
"%s [-dp] [-c console] [-t tty] [-w wtmp] [user ...]\n",
__progname);
#else
"%s [-dp] [-t tty] [-w wtmp] [user ...]\n", __progname);
#endif
exit(1);
}