ac(8) utility, brought over from FreeBSD 1.1.5.

3 files changed, 682 insertions, 59 deletions

diff --git a/usr.sbin/ac/Makefile b/usr.sbin/ac/Makefile
new file mode 100644
index 0000000..349e9ce
--- /dev/null
+++ b/usr.sbin/ac/Makefile
@@ -0,0 +1,18 @@
+#	$Id: Makefile,v 1.1.1.1 1994/05/18 08:00:44 csgr Exp $
+
+PROG=	ac
+MAN8=	ac.8
+
+# If "CONSOLE_TTY" is not defined, this program is compatible with the
+# traditional implementation (using SunOS 4.x as the sample traditional
+# implementation).  This is the default.
+#
+# If "CONSOLE_TTY" is defined, it must be defined to the appropriate
+# console name, e.g. "vga".  Additionally, the various commented-out
+# sections of the man page should be uncommented.  This is not the
+# default because of the inability to detect the proper console name
+# easily, especially on m68k systems, which can share binaries.
+#
+#CFLAGS+=-DCONSOLE_TTY=\"vga\"
+
+.include <bsd.prog.mk>
diff --git a/usr.sbin/ac/ac.8 b/usr.sbin/ac/ac.8
index 0c834a7..3c34716 100644
--- a/usr.sbin/ac/ac.8
+++ b/usr.sbin/ac/ac.8
@@ -1,5 +1,7 @@
-.\" Copyright (c) 1980, 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Copyright (c) 1994 Simon J. Gerraty
+.\" Copyright (c) 1994 Christopher G. Demetriou
+.\" All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
@@ -11,88 +13,118 @@
 .\"    documentation and/or other materials provided with the distribution.
 .\" 3. All advertising materials mentioning features or use of this software
 .\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
+.\"      This product includes software developed by Christopher G. Demetriou.
+.\" 3. The name of the author may not be used to endorse or promote products
+.\"    derived from this software without specific prior written permission
 .\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 .\"
-.\"     @(#)ac.8	8.2 (Berkeley) 4/19/94
+.\"	$Id: ac.8,v 1.1.1.1 1994/05/18 08:00:45 csgr Exp $
 .\"
-.Dd April 19, 1994
+.Dd March 15, 1994
 .Dt AC 8
-.Os BSD 4
+.Os
 .Sh NAME
 .Nm ac
-.Nd display connect time accounting
+.Nd connect time accounting
 .Sh SYNOPSIS
 .Nm ac
-.Op Fl d
-.Op Fl p
-.Op Fl w Ar file
+.Op Fl dp
+.\".Op Fl c Ar console
+.Op Fl t Ar tty
+.Op Fl w Ar wtmp
 .Op Ar users ...
 .Sh DESCRIPTION
-If the file
+If the file 
 .Pa /var/log/wtmp
-exists,
-a record of individual
-login and logout times are written to it by
-.Xr init 8
-and
+exists, a record of individual login and logout
+times are written to it by
 .Xr login 8
+and
+.Xr init 8 ,
 respectively.
-The program
-.Nm ac
-examines these
-records and writes the accumulated connect time for all logins to the
-standard output.
+.Nm \&Ac
+examines these records and writes the accumulated connect time
+for all logins to the standard output.
 .Pp
-Options available:
-.Bl -tag -width people
+The options are as follows:
+.Bl -tag -width indentXXX
 .It Fl d
 Display the connect times in 24 hour chunks.
+.\" .It Fl c Ar console
+.\" Use 
+.\" .Ar console
+.\" as the name of the device that local X sessions (ut_host of ":0.0")
+.\" originate from.  If any login has been recorded on
+.\" .Ar console
+.\" then these X sessions are ignored unless COMPAT_SUNOS was defined at
+.\" compile time.
 .It Fl p
-Display individual user totals.
-.It Fl w Ar file
-Read raw connect time data from
-.Ar file
-instead of the default file
+Print individual users' totals.
+.It Fl t Ar tty
+Only do accounting logins on certain ttys.  The
+.Ar tty
+specification can start with '!' to indicate not this
+.Ar tty
+and end with '*' to indicate all similarly named ttys.
+Multiple
+.Fl t
+flags may be specified.
+.It Fl w Ar wtmp
+Read connect time data from
+.Ar wtmp
+instead of the default file,
 .Pa /var/log/wtmp .
 .It Ar users ...
-Display totals for the given individuals
-only.
+Display totals for the given individuals only.
 .El
 .Pp
 If no arguments are given,
-.Nm
-displays the total amount of login time for all active accounts on the
-system.
+.Nm ac
+displays the total connect time for all
+accounts with login sessions recorded in
+.Pa wtmp .
 .Pp
 The default
 .Pa wtmp
-file is an infinitely increasing file
-unless frequently truncated.  This is normally
-done by the daily daemon scripts scheduled by
-.Xr cron 8
+file will increase without bound unless it is truncated.
+It is normally truncated by the daily scripts run
+by
+.Xr cron 8 ,
 which rename and rotate the
 .Pa wtmp
-files before truncating them (and keeping about a weeks worth on hand).
-No login times are collected however, if the file does not exist.
+files, keeping a week's worth of data on
+hand.  No login or connect time accounting is performed if
+.Pa /var/log/wtmp
+does not exist.
+.Pp
+For example,
+.Bd -literal -offset
+ac -p -t "ttyd*" > modems
+ac -p -t "!ttyd*" > other
+.Ed
+.Pp
+allows times recorded in
+.Pa modems
+to be charged out at a different rate than
+.Pa other .
+.Pp
+The
+.Nm ac
+utility exits 0 on success, and >0 if a fatal error occurs.
 .Sh FILES
 .Bl -tag -width /var/log/wtmp.[0-7] -compact
 .It Pa /var/log/wtmp
+connect time accounting file
 .It Pa /var/log/wtmp.[0-7]
 rotated files
 .El
@@ -100,8 +132,24 @@ rotated files
 .Xr init 8 ,
 .Xr sa 8 ,
 .Xr login 1 ,
-.Xr utmp 5 .
-.Sh HISTORY
-A
-.Nm
-command appeared in Version 6 AT&T UNIX.
+.Xr utmp
+.\" .Sh NOTES
+.\" If COMPAT_SUNOS is defined
+.\" .Nm ac
+.\" ignores the fact that entries with ut_host of ":0.0" are not real
+.\" login sessions.  Normally such entries are ignored except in the case
+.\" of a user being logged in when the 
+.\" .Pa wtmp
+.\" file was rotated, in which case a login with ut_host of ":0.0" may
+.\" appear without any preceeding console logins.  
+.\" If no one is logged in on the console, the user is deemed to have
+.\" logged in on at the earliest time stamp found in
+.\" .Pa wtmp .
+.\" Use of
+.\" .Pa console
+.\" allows
+.\" .Nm ac
+.\" to identify and correcty process a logout for the user.  The default
+.\" value for
+.\" .Pa console
+.\" is usually correct at compile time.
diff --git a/usr.sbin/ac/ac.c b/usr.sbin/ac/ac.c
new file mode 100644
index 0000000..2d68315
--- /dev/null
+++ b/usr.sbin/ac/ac.c
@@ -0,0 +1,557 @@
+/*
+ *      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 char rcsid[] = "$Id: ac.c,v 1.1.1.1 1994/05/18 08:00:45 csgr 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];
+	int	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 NEW(type) (type *)malloc(sizeof (type))
+
+#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 __P((int, char **));
+int			ac __P((FILE *));
+struct tty_list		*add_tty __P((char *));
+int			do_tty __P((char *));
+FILE			*file __P((char *));
+struct utmp_list	*log_in __P((struct utmp_list *, struct utmp *));
+struct utmp_list	*log_out __P((struct utmp_list *, struct utmp *));
+int			on_console __P((struct utmp_list *));
+void			show __P((char *, time_t));
+void			show_today __P((struct user_list *, struct utmp_list *,
+			    time_t));
+void			show_users __P((struct user_list *));
+struct user_list	*update_user __P((struct user_list *, char *, time_t));
+void			usage __P((void));
+
+/*
+ * open wtmp or die
+ */
+FILE *
+file(name)
+	char *name;
+{
+	FILE *fp;
+
+	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;
+}
+
+struct tty_list *
+add_tty(name)
+	char *name;
+{
+	struct tty_list *tp;
+	register char *rcp;
+
+	Flags |= AC_T;
+	
+	if ((tp = NEW(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++;
+	}
+	(void)strncpy(tp->name, name, sizeof (tp->name) - 1);
+	tp->name[sizeof (tp->name) - 1] = '\0';
+	if ((rcp = strchr(tp->name, '*')) != NULL) {	/* wild card */
+		*rcp = '\0';
+		tp->len = strlen(tp->name);	/* match len bytes only */
+	}
+	tp->next = Ttys;
+	Ttys = tp;
+	return Ttys;
+}
+
+/*
+ * should we process the named tty?
+ */
+int
+do_tty(name)
+	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(head)
+	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(head, name, secs)
+	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)) == 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 = NEW(struct user_list)) == NULL)
+		err(1, "malloc");
+	up->next = head;
+	(void)strncpy(up->name, name, sizeof (up->name) - 1);
+	up->name[sizeof (up->name) - 1] = '\0';	/* paranoid! */
+	up->secs = secs;
+	Total += secs;
+	return up;
+}
+
+int
+main(argc, argv)
+	int	argc;
+	char	**argv;
+{
+	FILE *fp;
+	int c;
+
+	fp = NULL;
+	while ((c = getopt(argc, argv, "Dc:dpt:w:")) != EOF) {
+		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(name, secs)
+	char *name;
+	time_t secs;
+{
+	(void)printf("\t%-*s %8.2f\n", UT_NAMESIZE, name,
+	    ((double)secs / 3600));
+}
+
+void
+show_users(list)
+	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(users, logins, secs)
+	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(head, up)
+	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(head, up)
+	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
+		 */
+		(void)strncpy(up->ut_line, Console, sizeof (up->ut_line) - 1);
+		up->ut_line[sizeof (up->ut_line) - 1] = '\0'; /* paranoid! */
+	}
+#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 = NEW(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(fp)
+	FILE	*fp;
+{
+	struct utmp_list *lp, *head = NULL;
+	struct utmp usr;
+	struct tm *ltm;
+	time_t secs;
+	int day = -1;
+	
+	while (fread((char *)&usr, sizeof(usr), 1, fp) == 1) {
+		if (!FirstTime)
+			FirstTime = 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 tty[p-y]*, 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("pqrstuvwxy", usr.ut_line[3]) == 0 ||
+				    *usr.ut_host != '\0')
+					head = log_in(head, &usr);
+			} else
+				head = log_out(head, &usr);
+			break;
+		}
+	}
+	(void)fclose(fp);
+	usr.ut_time = time((time_t *)0);
+	(void)strcpy(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((time_t *)0));
+	else {
+		if (Flags & AC_P)
+			show_users(Users);
+		show("total", Total);
+	}
+	return 0;
+}
+
+void
+usage()
+{
+	(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);
+}