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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ac/ac.c	Lines:	0	163	0.0 %
Date:	2017-11-13	Branches:	0	113	0.0 %


/*-
 * Copyright (c) 1994 Christopher G. Demetriou
 * Copyright (c) 1994 Simon J. Gerraty
 * 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/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
 */
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;
}

/*
 * 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;

	if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
		err(1, "pledge");

	fp = NULL;
	while ((c = getopt(argc, argv, "Ddpt:w:")) != -1) {
		switch (c) {
#ifdef DEBUG
		case 'D':
			Debug = 1;
			break;
#endif
		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.
	 */

	/*
	 * 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: "
	    "%s [-dp] [-t tty] [-w wtmp] [user ...]\n", __progname);
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/*-
2			* Copyright (c) 1994 Christopher G. Demetriou
3			* Copyright (c) 1994 Simon J. Gerraty
4			* All rights reserved.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			* 2. Redistributions in binary form must reproduce the above copyright
12			* notice, this list of conditions and the following disclaimer in the
13			* documentation and/or other materials provided with the distribution.
14			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25			* SUCH DAMAGE.
26			*/
27
28			#include <sys/types.h>
29			#include <sys/file.h>
30			#include <sys/time.h>
31			#include <err.h>
32			#include <errno.h>
33			#include <pwd.h>
34			#include <stdio.h>
35			#include <stdlib.h>
36			#include <string.h>
37			#include <utmp.h>
38			#include <unistd.h>
39
40			/*
41			* this is for our list of currently logged in sessions
42			*/
43			struct utmp_list {
44			struct utmp_list *next;
45			struct utmp usr;
46			};
47
48			/*
49			* this is for our list of users that are accumulating time.
50			*/
51			struct user_list {
52			struct user_list *next;
53			char name[UT_NAMESIZE+1];
54			time_t secs;
55			};
56
57			/*
58			* this is for chosing whether to ignore a login
59			*/
60			struct tty_list {
61			struct tty_list *next;
62			char name[UT_LINESIZE+3];
63			size_t len;
64			int ret;
65			};
66
67			/*
68			* globals - yes yuk
69			*/
70			static time_t Total = 0;
71			static time_t FirstTime = 0;
72			static int Flags = 0;
73			static struct user_list *Users = NULL;
74			static struct tty_list *Ttys = NULL;
75
76			#define AC_W 1 /* not _PATH_WTMP */
77			#define AC_D 2 /* daily totals (ignore -p) */
78			#define AC_P 4 /* per-user totals */
79			#define AC_U 8 /* specified users only */
80			#define AC_T 16 /* specified ttys only */
81
82			#ifdef DEBUG
83			static int Debug = 0;
84			#endif
85
86			int main(int, char **);
87			int ac(FILE *);
88			void add_tty(char *);
89			int do_tty(char *);
90			FILE file(char );
91			struct utmp_list log_in(struct utmp_list , struct utmp *);
92			struct utmp_list log_out(struct utmp_list , struct utmp *);
93			int on_console(struct utmp_list *);
94			void show(char *, time_t);
95			void show_today(struct user_list , struct utmp_list ,
96			time_t);
97			void show_users(struct user_list *);
98			struct user_list update_user(struct user_list , char *, time_t);
99			void usage(void);
100
101			/*
102			* open wtmp or die
103			*/
104			FILE *
105			file(char *name)
106			{
107			FILE *fp;
108
109			if (strcmp(name, "-") == 0)
110			fp = stdin;
111			else if ((fp = fopen(name, "r")) == NULL)
112			err(1, "%s", name);
113			/* in case we want to discriminate */
114			if (strcmp(_PATH_WTMP, name))
115			Flags \|= AC_W;
116			return fp;
117			}
118
119			void
120			add_tty(char *name)
121			{
122			struct tty_list *tp;
123			char *rcp;
124
125			Flags \|= AC_T;
126
127			if ((tp = malloc(sizeof(struct tty_list))) == NULL)
128			err(1, "malloc");
129			tp->len = 0; /* full match */
130			tp->ret = 1; /* do if match */
131			if (name == '!') { / don't do if match */
132			tp->ret = 0;
133			name++;
134			}
135			strlcpy(tp->name, name, sizeof (tp->name));
136			if ((rcp = strchr(tp->name, '')) != NULL) { / wild card */
137			*rcp = '\0';
138			tp->len = strlen(tp->name); /* match len bytes only */
139			}
140			tp->next = Ttys;
141			Ttys = tp;
142			}
143
144			/*
145			* should we process the named tty?
146			*/
147			int
148			do_tty(char *name)
149			{
150			struct tty_list *tp;
151			int def_ret = 0;
152
153			for (tp = Ttys; tp != NULL; tp = tp->next) {
154			if (tp->ret == 0) /* specific don't */
155			def_ret = 1; /* default do */
156			if (tp->len != 0) {
157			if (strncmp(name, tp->name, tp->len) == 0)
158			return tp->ret;
159			} else {
160			if (strncmp(name, tp->name, sizeof (tp->name)) == 0)
161			return tp->ret;
162			}
163			}
164			return def_ret;
165			}
166
167			/*
168			* update user's login time
169			*/
170			struct user_list *
171			update_user(struct user_list head, char name, time_t secs)
172			{
173			struct user_list *up;
174
175			for (up = head; up != NULL; up = up->next) {
176			if (strncmp(up->name, name, sizeof (up->name) - 1) == 0) {
177			up->secs += secs;
178			Total += secs;
179			return head;
180			}
181			}
182			/*
183			* not found so add new user unless specified users only
184			*/
185			if (Flags & AC_U)
186			return head;
187
188			if ((up = malloc(sizeof(struct user_list))) == NULL)
189			err(1, "malloc");
190			up->next = head;
191			strlcpy(up->name, name, sizeof (up->name));
192			up->secs = secs;
193			Total += secs;
194			return up;
195			}
196
197			int
198			main(int argc, char *argv[])
199			{
200			FILE *fp;
201			int c;
202
203			if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
204			err(1, "pledge");
205
206			fp = NULL;
207			while ((c = getopt(argc, argv, "Ddpt:w:")) != -1) {
208			switch (c) {
209			#ifdef DEBUG
210			case 'D':
211			Debug = 1;
212			break;
213			#endif
214			case 'd':
215			Flags \|= AC_D;
216			break;
217			case 'p':
218			Flags \|= AC_P;
219			break;
220			case 't': /* only do specified ttys */
221			add_tty(optarg);
222			break;
223			case 'w':
224			fp = file(optarg);
225			break;
226			case '?':
227			default:
228			usage();
229			break;
230			}
231			}
232			if (optind < argc) {
233			/*
234			* initialize user list
235			*/
236			for (; optind < argc; optind++) {
237			Users = update_user(Users, argv[optind], 0L);
238			}
239			Flags \|= AC_U; /* freeze user list */
240			}
241			if (Flags & AC_D)
242			Flags &= ~AC_P;
243			if (fp == NULL) {
244			/*
245			* if _PATH_WTMP does not exist, exit quietly
246			*/
247			if (access(_PATH_WTMP, 0) != 0 && errno == ENOENT)
248			return 0;
249
250			fp = file(_PATH_WTMP);
251			}
252			ac(fp);
253
254			return 0;
255			}
256
257			/*
258			* print login time in decimal hours
259			*/
260			void
261			show(char *name, time_t secs)
262			{
263			(void)printf("\t%-*s %8.2f\n", UT_NAMESIZE, name,
264			((double)secs / 3600));
265			}
266
267			void
268			show_users(struct user_list *list)
269			{
270			struct user_list *lp;
271
272			for (lp = list; lp; lp = lp->next)
273			show(lp->name, lp->secs);
274			}
275
276			/*
277			* print total login time for 24hr period in decimal hours
278			*/
279			void
280			show_today(struct user_list users, struct utmp_list logins, time_t secs)
281			{
282			struct user_list *up;
283			struct utmp_list *lp;
284			char date[64];
285			time_t yesterday = secs - 1;
286
287			(void)strftime(date, sizeof (date), "%b %e total",
288			localtime(&yesterday));
289
290			/* restore the missing second */
291			yesterday++;
292
293			for (lp = logins; lp != NULL; lp = lp->next) {
294			secs = yesterday - lp->usr.ut_time;
295			Users = update_user(Users, lp->usr.ut_name, secs);
296			lp->usr.ut_time = yesterday; /* as if they just logged in */
297			}
298			secs = 0;
299			for (up = users; up != NULL; up = up->next) {
300			secs += up->secs;
301			up->secs = 0; /* for next day */
302			}
303			if (secs)
304			(void)printf("%s %11.2f\n", date, ((double)secs / 3600));
305			}
306
307			/*
308			* log a user out and update their times.
309			* if ut_line is "~", we log all users out as the system has
310			* been shut down.
311			*/
312			struct utmp_list *
313			log_out(struct utmp_list head, struct utmp up)
314			{
315			struct utmp_list lp, lp2, *tlp;
316			time_t secs;
317
318			for (lp = head, lp2 = NULL; lp != NULL; )
319			if (*up->ut_line == '~' \|\| strncmp(lp->usr.ut_line, up->ut_line,
320			sizeof (up->ut_line)) == 0) {
321			secs = up->ut_time - lp->usr.ut_time;
322			Users = update_user(Users, lp->usr.ut_name, secs);
323			#ifdef DEBUG
324			if (Debug)
325			printf("%-.s %-.s: %-.*s logged out (%2d:%02d:%02d)\n",
326			19, ctime(&up->ut_time),
327			sizeof (lp->usr.ut_line), lp->usr.ut_line,
328			sizeof (lp->usr.ut_name), lp->usr.ut_name,
329			secs / 3600, (secs % 3600) / 60, secs % 60);
330			#endif
331			/*
332			* now lose it
333			*/
334			tlp = lp;
335			lp = lp->next;
336			if (tlp == head)
337			head = lp;
338			else if (lp2 != NULL)
339			lp2->next = lp;
340			free(tlp);
341			} else {
342			lp2 = lp;
343			lp = lp->next;
344			}
345			return head;
346			}
347
348
349			/*
350			* if do_tty says ok, login a user
351			*/
352			struct utmp_list *
353			log_in(struct utmp_list head, struct utmp up)
354			{
355			struct utmp_list *lp;
356
357			/*
358			* this could be a login. if we're not dealing with
359			* the console name, say it is.
360			*
361			* If we are, and if ut_host==":0.0" we know that it
362			* isn't a real login. _But_ if we have not yet recorded
363			* someone being logged in on Console - due to the wtmp
364			* file starting after they logged in, we'll pretend they
365			* logged in, at the start of the wtmp file.
366			*/
367
368			/*
369			* If we are doing specified ttys only, we ignore
370			* anything else.
371			*/
372			if (Flags & AC_T)
373			if (!do_tty(up->ut_line))
374			return head;
375
376			/*
377			* go ahead and log them in
378			*/
379			if ((lp = malloc(sizeof(struct utmp_list))) == NULL)
380			err(1, "malloc");
381			lp->next = head;
382			head = lp;
383			memmove((char )&lp->usr, (char )up, sizeof (struct utmp));
384			#ifdef DEBUG
385			if (Debug) {
386			printf("%-.s %-.s: %-.*s logged in", 19,
387			ctime(&lp->usr.ut_time), sizeof (up->ut_line),
388			up->ut_line, sizeof (up->ut_name), up->ut_name);
389			if (*up->ut_host)
390			printf(" (%-.*s)", sizeof (up->ut_host), up->ut_host);
391			putchar('\n');
392			}
393			#endif
394			return head;
395			}
396
397			int
398			ac(FILE *fp)
399			{
400			struct utmp_list lp, head = NULL;
401			struct utmp usr;
402			struct tm *ltm;
403			time_t secs = 0, prev = 0;
404			int day = -1;
405
406			while (fread((char *)&usr, sizeof(usr), 1, fp) == 1) {
407			if (!FirstTime)
408			FirstTime = usr.ut_time;
409			if (usr.ut_time < prev)
410			continue; /* broken record */
411			prev = usr.ut_time;
412			if (Flags & AC_D) {
413			ltm = localtime(&usr.ut_time);
414			if (day >= 0 && day != ltm->tm_yday) {
415			day = ltm->tm_yday;
416			/*
417			* print yesterday's total
418			*/
419			secs = usr.ut_time;
420			secs -= ltm->tm_sec;
421			secs -= 60 * ltm->tm_min;
422			secs -= 3600 * ltm->tm_hour;
423			show_today(Users, head, secs);
424			} else
425			day = ltm->tm_yday;
426			}
427			switch(*usr.ut_line) {
428			case '\|':
429			secs = usr.ut_time;
430			break;
431			case '{':
432			secs -= usr.ut_time;
433			/*
434			* adjust time for those logged in
435			*/
436			for (lp = head; lp != NULL; lp = lp->next)
437			lp->usr.ut_time -= secs;
438			break;
439			case '~': /* reboot or shutdown */
440			head = log_out(head, &usr);
441			FirstTime = usr.ut_time; /* shouldn't be needed */
442			break;
443			default:
444			/*
445			* if they came in on a pseudo-tty, then it is only
446			* a login session if the ut_host field is non-empty
447			*/
448			if (*usr.ut_name) {
449			if (strncmp(usr.ut_line, "tty", 3) != 0 \|\|
450			strchr("pqrstuvwxyzPQRST", usr.ut_line[3]) != NULL \|\|
451			*usr.ut_host != '\0')
452			head = log_in(head, &usr);
453			} else
454			head = log_out(head, &usr);
455			break;
456			}
457			}
458			(void)fclose(fp);
459			if (!(Flags & AC_W))
460			usr.ut_time = time(NULL);
461			(void)strlcpy(usr.ut_line, "~", sizeof usr.ut_line);
462
463			if (Flags & AC_D) {
464			ltm = localtime(&usr.ut_time);
465			if (day >= 0 && day != ltm->tm_yday) {
466			/*
467			* print yesterday's total
468			*/
469			secs = usr.ut_time;
470			secs -= ltm->tm_sec;
471			secs -= 60 * ltm->tm_min;
472			secs -= 3600 * ltm->tm_hour;
473			show_today(Users, head, secs);
474			}
475			}
476			/*
477			* anyone still logged in gets time up to now
478			*/
479			head = log_out(head, &usr);
480
481			if (Flags & AC_D)
482			show_today(Users, head, time(NULL));
483			else {
484			if (Flags & AC_P)
485			show_users(Users);
486			show("total", Total);
487			}
488			return 0;
489			}
490
491			void
492			usage(void)
493			{
494			extern char *__progname;
495			(void)fprintf(stderr, "usage: "
496			"%s [-dp] [-t tty] [-w wtmp] [user ...]\n", __progname);
497			exit(1);
498			}