/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/


/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 *	acctprc1 [ctmpfile]
 *	reads std. input (acct.h format), adds login names
 *	writes std. output (ptmp.h/ascii format)
 *	if ctmpfile is given, it is expected have ctmp.h/ascii data,
 *	sorted by uid/name; it is used to make better guesses at login names
 */

#include <sys/types.h>
#include <sys/param.h>
#include "acctdef.h"
#include <stdio.h>
#include <errno.h>
#include <sys/acct.h>
#include <stdlib.h>

#define MYKIND(flag)	((flag & ACCTF) == 0)

struct	acct	ab;
struct	ctmp	cb;
struct	ptmp	pb;

int	a_usize = A_USIZE;
struct urec {				/* 1 for each distinct uid/name */
	uid_t	ur_uid;			/* sorted by uid/name */
	char	ur_name[NSZ];
	struct srec	*ur_srec;		/* ptr to first session */
	short	ur_cnt;			/* # sessions */
} * ur;

struct urec *urlast;

int	a_ssize = A_SSIZE;
int	ssize;

struct srec {				/* 1 for each distinct session */
	dev_t	sr_tty;			/* dev, used to connect with process*/
	time_t	sr_start;		/* start time of session */
	time_t	sr_end;			/* end time of session */
} * sr;

char *getname(uid_t, dev_t, time_t);
void readctmp(char *);
char *getnamc(uid_t, dev_t, time_t);
int aread(int);

char	*uidtonam();

int
main(int argc, char **argv)
{
	long		elaps[2];
	ulong_t		etime, stime;
	unsigned long	mem;
	ulong_t		expand();
	int 		ver;	/* version of acct struct */
	int 		aread();

	if ((ur = (struct urec *) calloc(a_usize,
		sizeof (struct urec))) == NULL) {
		fprintf(stderr, "acctpr1: Cannot allocate memory\n");
		exit(3);
	}

	urlast = ur;
	if ((sr = (struct srec *) calloc(a_ssize,
		sizeof (struct srec))) == NULL) {
		fprintf(stderr, "acctpr1: Cannot allocate memory\n");
		exit(3);
	}

	while (--argc > 0) {
		if (**++argv == '-')
			switch(*++*argv) {
			}
		else {
			readctmp(*argv);
		}
	}


	if (fread((char *)&ab, sizeof(struct acct), 1, stdin) != 1)
		exit(1);
	else if (ab.ac_flag & AEXPND)
		ver = 2;	/* 4.0 acct structure */
	else
		ver = 1;	/* 3.x acct structure */

	rewind(stdin);

	while (aread(ver) == 1) {
		if (!MYKIND(ab.ac_flag))
			continue;
		pb.pt_uid = ab.ac_uid;
		CPYN(pb.pt_name, getname(ab.ac_uid, ab.ac_tty, ab.ac_btime));
		/*
		 * approximate cpu P/NP split as same as elapsed time
		 */
		if ((etime = SECS(expand(ab.ac_etime))) == 0)
			etime = 1;
		stime = expand(ab.ac_stime) + expand(ab.ac_utime);
		mem = expand(ab.ac_mem);
		if(pnpsplit(ab.ac_btime, etime, elaps) == 0) {
			fprintf(stderr, "acctprc1: could not calculate prime/non-prime hours\n");

			exit(1);
		}
		pb.pt_cpu[0] = (double)stime * (double)elaps[0] / etime;
		pb.pt_cpu[1] = (stime > pb.pt_cpu[0])? stime - pb.pt_cpu[0] : 0;
		pb.pt_cpu[1] = stime - pb.pt_cpu[0];
		if (stime)
			pb.pt_mem = (mem + stime - 1) / stime;
		else
			pb.pt_mem = 0;	/* unlikely */
		printf("%ld\t%.*s\t%lu\t%lu\t%u\n",
		    pb.pt_uid,
		    OUTPUT_NSZ,
		    pb.pt_name,
		    pb.pt_cpu[0], pb.pt_cpu[1],
		    pb.pt_mem);
	}

	exit(0);
}

/*
 *	return ptr to name corresponding to uid
 *	try ctmp first, then use uidtonam (internal list or passwd file)
 */
char *
getname(uid_t uid, dev_t tty, time_t start)
{
	char *p;

	if ((p = getnamc(uid, tty, start)) != NULL)
		return (p);
	return (uidtonam(uid));
}

/*
 *	read ctmp file, build up urec-srec data structures for
 *	later use by getnamc
 */
void
readctmp(char *fname)
{
	FILE *fp;
	struct urec *up;
	struct srec *sp;
	int i = 0, j = 0, k=0;

	if ((fp = fopen(fname, "r")) == NULL) {
		fprintf(stderr, "acctprc1: can't open %s\n", fname);
		return;
	}

	up = NULL;
	sp = sr;

	while (fscanf(fp, "%hd\t%ld\t%s\t%lu\t%lu\t%lu\t%*[^\n]",
		&cb.ct_tty,
		&cb.ct_uid,
		cb.ct_name,
		&cb.ct_con[0],
		&cb.ct_con[1],
		&cb.ct_start) != EOF) {
		if (up == NULL || cb.ct_uid != up->ur_uid ||
			!EQN(cb.ct_name, up->ur_name)) {
			if (up == NULL)
				up = ur;
			if (++up >= &ur[a_usize]) {
				a_usize = a_usize + A_USIZE;
                		if ((ur = (struct urec *) realloc(ur, a_usize *
					sizeof (struct urec))) == NULL) {
                        		fprintf(stderr, "acctprc1: 1 Cannot reallocate memory\n");
					exit(2);
				}
				up = &ur[a_usize - A_USIZE];
			}
			up->ur_uid = cb.ct_uid;
			CPYN(up->ur_name, cb.ct_name);
			up->ur_srec = sp;
			up->ur_cnt = 0;
		}

		if (sp >= &sr[a_ssize-1]) {
			a_ssize = a_ssize + A_SSIZE;
			if ((sr = (struct srec *) realloc(sr, a_ssize *
				sizeof (struct srec))) == NULL) {
				fprintf(stderr, "acctprc1: 2 Cannot reallocate memory\n");
				printf("errno=%d\n", errno);
				exit(2);
			}
			sp = &sr[a_ssize - A_SSIZE];
		}

		sp->sr_tty = cb.ct_tty;
		sp->sr_start = cb.ct_start;
		sp->sr_end = cb.ct_start + cb.ct_con[0] + cb.ct_con[1];
		sp++;
		up->ur_cnt++;
	}
	if (up != NULL)
		urlast = ++up;
	fclose(fp);
}

/*
 *	using urec-srec data (if any), make best guess at login name
 *	corresponding to uid, return ptr to the name.
 *	must match on tty; use start time to help guess
 *	for any urec having same uid as uid, search array of associated
 *	srecs for those having same tty
 *	if start time of process is within range of session, that's it
 *	if none can be found within range, give it to person of same uid
 *	who last logged off on that terminal
 */
char *
getnamc(uid_t uid, dev_t tty, time_t start)
{
	struct urec *up;
	struct srec *sp;
	struct srec *splast;
	long latest;
	char *guess;

	latest = 0;
	guess = NULL;
	for (up = ur; up < urlast && uid >= up->ur_uid; up++)
		if (uid == up->ur_uid) {
			sp = up->ur_srec;
			splast = sp+up->ur_cnt;
			for (; sp < splast; sp++)
				if (tty == sp->sr_tty) {
					if (start >= sp->sr_start &&
						start <= sp->sr_end)
						return(up->ur_name);
					if (start >= sp->sr_start &&
						sp->sr_end > latest) {
						latest = sp->sr_end;
						guess = up->ur_name;
					}
				}
		}

	return(guess);
}
int
aread(int ver)
{
	struct o_acct oab;
	int ret;

	if (ver != 2) {
		if ((ret = fread((char *)&oab, sizeof(struct o_acct), 1, stdin)) == 1){
			/* copy SVR3 acct struct to SVR4 acct struct */
			ab.ac_flag = oab.ac_flag | AEXPND;
			ab.ac_stat = oab.ac_stat;
			ab.ac_uid = (uid_t) oab.ac_uid;
			ab.ac_gid = (gid_t) oab.ac_gid;
			ab.ac_tty = (dev_t) oab.ac_tty;
			ab.ac_btime = oab.ac_btime;
			ab.ac_utime = oab.ac_utime;
			ab.ac_stime = oab.ac_stime;
			ab.ac_mem = oab.ac_mem;
			ab.ac_io = oab.ac_io;
			ab.ac_rw = oab.ac_rw;
			strcpy(ab.ac_comm, oab.ac_comm);
		}
	} else
		ret = fread((char *)&ab, sizeof(struct acct), 1, stdin);


	return(ret != 1 ? 0 : 1);
}