/*-
 * Copyright (c) 1983, 1989, 1992, 1993
 *      The Regents of the University of California.  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.
 * 3. 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 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.
 */

/*
 * Cursed vmstat -- from Robert Elz.
 */

#include <sys/user.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/namei.h>
#include <sys/sysctl.h>
#include <sys/vmmeter.h>

#include <vm/vm_param.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <kinfo.h>
#include <langinfo.h>
#include <nlist.h>
#include <paths.h>
#include <signal.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "utmpentry.h"
#include <devstat.h>
#include "systat.h"
#include "extern.h"
#include "devs.h"

#define NKVMSW  16

static struct Info {
        struct kinfo_cputime cp_time;
        struct  vmmeter Vmm;
        struct  vmtotal Total;
        struct  vmstats Vms;
        struct  nchstats nchstats;
        long    nchcount;
        long    nchpathcount;
        long    *intrcnt;
        long    bufspace;
        int     maxvnodes;
        int     cachedvnodes;
        int     inactivevnodes;
        int     activevnodes;
        long    dirtybufspace;
        long    physmem;
        struct kvm_swap  kvmsw[NKVMSW];
} s, s1, s2, z;

struct statinfo run;
struct kinfo_cputime cp_time;
static int kvnsw;

#define vmm s.Vmm
#define vms s.Vms
#define oldvmm s1.Vmm
#define oldvms s1.Vms
#define total s.Total
#define nchtotal s.nchstats
#define oldnchtotal s1.nchstats

static  enum state { BOOT, TIME, RUN } state = TIME;

static void allocinfo(struct Info *);
static void copyinfo(struct Info *, struct Info *);
static void dinfo(int, int, struct statinfo *, struct statinfo *);
static void getinfo(struct Info *);
static void put64(int64_t, int, int, int, int);
static void putfloat(double, int, int, int, int, int);
static void putlongdouble(long double, int, int, int, int, int);
static void putlongdoublez(long double, int, int, int, int, int);
static int ucount(void);

static  int ncpu;
static  char buf[26];
static  time_t t;
static  double etime;
static  int nintr;
static  int  *intralias;
static  int  *intrsmp;
static  long *intrloc;
static  long *lacc;
static  char **intrname;
static  int nextintsrow;
static  int extended_vm_stats;



WINDOW *
openkre(void)
{

        return (stdscr);
}

void
closekre(WINDOW *w)
{

        if (w == NULL)
                return;
        wclear(w);
        wrefresh(w);
}


static struct nlist namelist[] = {
#define X_BUFFERSPACE   0
        { .n_name = "_bufspace" },
#define X_NCHSTATS      1
        { .n_name = "_nchstats" },
#define X_DESIREDVNODES 2
        { .n_name = "_maxvnodes" },
#define X_CACHEDVNODES  3
        { .n_name = "_cachedvnodes" },
#define X_INACTIVEVNODES 4
        { .n_name = "_inactivevnodes" },
#define X_ACTIVEVNODES  5
        { .n_name = "_activevnodes" },
#define X_NUMDIRTYBUFFERS 6
        { .n_name = "_dirtybufspace" },
        { .n_name = "" },
};

/*
 * These constants define where the major pieces are laid out
 */
#define STATROW          0      /* uses 1 row and 68 cols */
#define STATCOL          2
#define MEMROW           2      /* uses 4 rows and 31 cols */
#define MEMCOLA          0
#define MEMCOLB          17
#define PAGEROW          2      /* uses 4 rows and 26 cols */
#define PAGECOL         45
#define INTSROW          6      /* uses all rows to bottom and 17 cols */
#define INTSCOL         61
#define PROCSROW         7      /* uses 2 rows and 20 cols */
#define PROCSCOL         0
#define GENSTATROW       7      /* uses 2 rows and 30 cols */
#define GENSTATCOL      16
#define VMSTATROW        6      /* uses 17 rows and 12 cols */
#define VMSTATCOL       50
#define GRAPHROW        10      /* uses 3 rows and 51 cols */
#define GRAPHCOL         0
#define NAMEIROW        14      /* uses 3 rows and 38 cols */
#define NAMEICOL         0
#define EXECROW         14      /* uses 2 rows and 5 cols */
#define EXECCOL         38
#define DISKROW         17      /* uses 6 rows and 50 cols (for 9 drives) */
#define DISKCOL          0

#define DRIVESPACE       7      /* max # for space */

#define MAXDRIVES       DRIVESPACE       /* max # to display */

static
int
findintralias(const char *name, int limit)
{
        int i;
        size_t nlen;
        size_t ilen;

        nlen = strlen(name);
        for (i = 0; i < limit; ++i) {
                if (strcmp(name, intrname[i]) == 0)
                        break;
                ilen = strlen(intrname[i]);
                if (nlen == ilen &&
                    nlen > 1 &&
                    strncmp(name, intrname[i], nlen - 1) == 0 &&
                    strchr(name, ' ') &&
                    isdigit(name[nlen - 1]) &&
                    (isdigit(intrname[i][nlen - 1]) ||
                     intrname[i][nlen - 1] == '*')) {
                        intrname[i][nlen - 1] = '*';
                        break;
                }
        }
        return i;
}

int
initkre(void)
{
        char *intrnamebuf;
        size_t bytes;
        size_t b;
        size_t i;

        if (namelist[0].n_type == 0) {
                if (kvm_nlist(kd, namelist)) {
                        nlisterr(namelist);
                        return(0);
                }
                if (namelist[0].n_type == 0) {
                        error("No namelist");
                        return(0);
                }
        }

        if ((num_devices = getnumdevs()) < 0) {
                warnx("%s", devstat_errbuf);
                return(0);
        }

        cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
        last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
        run.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
        bzero(cur.dinfo, sizeof(struct devinfo));
        bzero(last.dinfo, sizeof(struct devinfo));
        bzero(run.dinfo, sizeof(struct devinfo));

        if (dsinit(MAXDRIVES, &cur, &last, &run) != 1)
                return(0);

        if (nintr == 0) {
                if (sysctlbyname("hw.intrnames", NULL, &bytes, NULL, 0) == 0) {
                        intrnamebuf = malloc(bytes);
                        sysctlbyname("hw.intrnames", intrnamebuf, &bytes,
                                        NULL, 0);
                        for (i = 0; i < bytes; ++i) {
                                if (intrnamebuf[i] == 0)
                                        ++nintr;
                        }
                        intrname = malloc(nintr * sizeof(char *));
                        intrloc = malloc(nintr * sizeof(*intrloc));
                        lacc = malloc(nintr * sizeof(*lacc));
                        intralias = malloc(nintr * sizeof(*intralias));
                        intrsmp = malloc(nintr * sizeof(*intrsmp));
                        bzero(intrsmp, nintr * sizeof(*intrsmp));

                        nintr = 0;
                        for (b = i = 0; i < bytes; ++i) {
                                if (intrnamebuf[i] == 0) {
                                        intrname[nintr] = intrnamebuf + b;
                                        intrloc[nintr] = 0;
                                        intralias[nintr] =
                                          findintralias(intrname[nintr], nintr);
                                        ++intrsmp[intralias[nintr]];
                                        b = i + 1;
                                        ++nintr;
                                }
                        }
                }
                nextintsrow = INTSROW + 2;
                allocinfo(&s);
                allocinfo(&s1);
                allocinfo(&s2);
                allocinfo(&z);
        }
        getinfo(&s2);
        copyinfo(&s2, &s1);
        return(1);
}

void
fetchkre(void)
{
        time_t now;
        struct tm *tp;
        static int d_first = -1;

        if (d_first < 0)
                d_first = (*nl_langinfo(D_MD_ORDER) == 'd');

        time(&now);
        tp = localtime(&now);
        (void) strftime(buf, sizeof(buf),
                        d_first ? "%e %b %R" : "%b %e %R", tp);
        getinfo(&s);
}

void
labelkre(void)
{
        int i, j;

        clear();
        mvprintw(STATROW, STATCOL + 4, "users    Load");
        mvprintw(MEMROW + 0, MEMCOLA, "Active ");
        mvprintw(MEMROW + 1, MEMCOLA, "Kernel ");
        mvprintw(MEMROW + 2, MEMCOLA, "Free   ");
        mvprintw(MEMROW + 3, MEMCOLA, "Total  ");

        mvprintw(MEMROW + 2, MEMCOLA + 14, "i+c+f");

        mvprintw(MEMROW + 0, MEMCOLB, "PMAP");
        mvprintw(MEMROW + 0, MEMCOLB + 13, "VMRSS");
        mvprintw(MEMROW + 1, MEMCOLB, "SWAP");
        mvprintw(MEMROW + 1, MEMCOLB + 13, "SWTOT");

        mvprintw(PAGEROW, PAGECOL,     "       VNODE PAGER    SWAP PAGER ");
        mvprintw(PAGEROW + 1, PAGECOL, "          in   out      in   out ");
        mvprintw(PAGEROW + 2, PAGECOL, "bytes");
        mvprintw(PAGEROW + 3, PAGECOL, "count");

        mvprintw(INTSROW, INTSCOL + 3, " Interrupts");
        mvprintw(INTSROW + 1, INTSCOL + 9, "total");

        mvprintw(VMSTATROW + 1, VMSTATCOL + 8, "cow");
        mvprintw(VMSTATROW + 2, VMSTATCOL + 8, "wire");
        mvprintw(VMSTATROW + 3, VMSTATCOL + 8, "act");
        mvprintw(VMSTATROW + 4, VMSTATCOL + 8, "inact");
        mvprintw(VMSTATROW + 5, VMSTATCOL + 8, "cache");
        mvprintw(VMSTATROW + 6, VMSTATCOL + 8, "free");
        mvprintw(VMSTATROW + 7, VMSTATCOL + 8, "daefr");
        mvprintw(VMSTATROW + 8, VMSTATCOL + 8, "prcfr");
        mvprintw(VMSTATROW + 9, VMSTATCOL + 8, "react");
        mvprintw(VMSTATROW + 10, VMSTATCOL + 8, "pdwake");
        mvprintw(VMSTATROW + 11, VMSTATCOL + 8, "pdpgs");
        mvprintw(VMSTATROW + 12, VMSTATCOL + 8, "intrn");
        mvprintw(VMSTATROW + 13, VMSTATCOL + 8, "buf");
        mvprintw(VMSTATROW + 14, VMSTATCOL + 8, "dirtybuf");

        mvprintw(VMSTATROW + 15, VMSTATCOL + 8, "activ-vp");
        mvprintw(VMSTATROW + 16, VMSTATCOL + 8, "cachd-vp");
        mvprintw(VMSTATROW + 17, VMSTATCOL + 8, "inact-vp");

        mvprintw(GENSTATROW, GENSTATCOL, "  Csw  Trp  Sys  Int  Sof  Flt");

        mvprintw(GRAPHROW, GRAPHCOL,
                "  . %%Sys    . %%Intr   . %%User   . %%Nice   . %%Idle");
        mvprintw(PROCSROW, PROCSCOL, "   r   p   d   s");
        mvprintw(GRAPHROW + 1, GRAPHCOL,
                "|    |    |    |    |    |    |    |    |    |    |");

        mvprintw(NAMEIROW, NAMEICOL, "Path-lookups   hits   %%    Components");
        mvprintw(EXECROW, EXECCOL, "Execs");
        mvprintw(DISKROW, DISKCOL, "Disks");
        mvprintw(DISKROW + 1, DISKCOL, "KB/t");
        mvprintw(DISKROW + 2, DISKCOL, "tpr/s");
        mvprintw(DISKROW + 3, DISKCOL, "MBr/s");
        mvprintw(DISKROW + 4, DISKCOL, "tpw/s");
        mvprintw(DISKROW + 5, DISKCOL, "MBw/s");
        mvprintw(DISKROW + 6, DISKCOL, "%% busy");

        /*
         * For now, we don't support a fourth disk statistic.  So there's
         * no point in providing a label for it.  If someone can think of a
         * fourth useful disk statistic, there is room to add it.
         */
        j = 0;
        for (i = 0; i < num_devices && j < MAXDRIVES; i++)
                if (dev_select[i].selected) {
                        char tmpstr[80];
                        sprintf(tmpstr, "%s%d", dev_select[i].device_name,
                                dev_select[i].unit_number);
                        mvprintw(DISKROW, DISKCOL + 5 + 6 * j,
                                " %5.5s", tmpstr);
                        j++;
                }

        if (j <= 4) {
                /*
                 * room for extended VM stats
                 */
                mvprintw(VMSTATROW + 11, VMSTATCOL - 6, "nzfod");
                mvprintw(VMSTATROW + 12, VMSTATCOL - 6, "ozfod");
                mvprintw(VMSTATROW + 13, VMSTATCOL - 6, "%%zslo");
                mvprintw(VMSTATROW + 14, VMSTATCOL - 6, "pgfre");
                extended_vm_stats = 1;
        } else {
                extended_vm_stats = 0;
                mvprintw(VMSTATROW + 0, VMSTATCOL + 8, "zfod");
        }

        for (i = 0; i < nintr; i++) {
                if (intrloc[i] == 0)
                        continue;
                mvprintw(intrloc[i], INTSCOL + 9, "%-10.10s", intrname[i]);
        }
}

#define CP_UPDATE(fld)  do {    \
        uint64_t lt;            \
        lt=s.fld;               \
        s.fld-=s1.fld;          \
        if(state==TIME)         \
                s1.fld=lt;      \
        lt=fld;                 \
        fld-=old_##fld;         \
        if(state==TIME)         \
                old_##fld=lt;   \
        etime += s.fld;         \
} while(0)
#define X(fld)  {t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
#define Y(fld)  {t = s.fld; s.fld -= s1.fld; if(state == TIME) s1.fld = t;}
#define Z(fld)  {t = s.nchstats.fld; s.nchstats.fld -= s1.nchstats.fld; \
        if(state == TIME) s1.nchstats.fld = t;}
#define PUTRATE(fld, l, c, w) \
        Y(fld); \
        put64((int64_t)((float)s.fld/etime + 0.5), l, c, w, 'D')
#define PUTRATE_PGTOB(fld, l, c, w) \
        Y(fld); \
        put64((int64_t)((float)s.fld/etime + 0.5) * PAGE_SIZE, l, c, w, 0)
#define MAXFAIL 5

#define CPUSTATES 5
static  const char cpuchar[5] = { '=' , '+', '>', '-', ' ' };

static  const size_t cpuoffsets[] = {
        offsetof(struct kinfo_cputime, cp_sys),
        offsetof(struct kinfo_cputime, cp_intr),
        offsetof(struct kinfo_cputime, cp_user),
        offsetof(struct kinfo_cputime, cp_nice),
        offsetof(struct kinfo_cputime, cp_idle)
};

void
showkre(void)
{
        float f1, f2;
        int psiz;
        int i, j, lc;
        long inttotal;
        long l;
        static int failcnt = 0;
        double total_time;

        etime = 0;
        CP_UPDATE(cp_time.cp_user);
        CP_UPDATE(cp_time.cp_nice);
        CP_UPDATE(cp_time.cp_sys);
        CP_UPDATE(cp_time.cp_intr);
        CP_UPDATE(cp_time.cp_idle);

        total_time = etime;
        if (total_time == 0.0)
                total_time = 1.0;

        if (etime < 100000.0) { /* < 100ms ignore this trash */
                if (failcnt++ >= MAXFAIL) {
                        clear();
                        mvprintw(2, 10, "The alternate system clock has died!");
                        mvprintw(3, 10, "Reverting to ``pigs'' display.");
                        move(CMDLINE, 0);
                        refresh();
                        failcnt = 0;
                        sleep(5);
                        command("pigs");
                }
                return;
        }
        failcnt = 0;
        etime /= 1000000.0;
        etime /= ncpu;
        if (etime == 0)
                etime = 1;
        inttotal = 0;
        bzero(lacc, nintr * sizeof(*lacc));

        for (i = 0; i < nintr; i++) {
                if (s.intrcnt[i] == 0)
                        continue;
                j = intralias[i];
                if (intrloc[j] == 0) {
                        if (nextintsrow == LINES)
                                continue;
                        intrloc[j] = nextintsrow++;
                        mvprintw(intrloc[j], INTSCOL + 9, "%-10.10s",
                                intrname[j]);
                }
                X(intrcnt);
                l = (long)((float)s.intrcnt[i]/etime + 0.5);
                lacc[j] += l;
                inttotal += l;
                put64(lacc[j], intrloc[j], INTSCOL + 3, 5, 'D');
        }
        put64(inttotal, INTSROW + 1, INTSCOL + 3, 5, 'D');
        Z(ncs_goodhits); Z(ncs_badhits); Z(ncs_miss);
        Z(ncs_longhits); Z(ncs_longmiss); Z(ncs_neghits);
        s.nchcount = nchtotal.ncs_goodhits + nchtotal.ncs_badhits +
            nchtotal.ncs_miss + nchtotal.ncs_neghits;
        s.nchpathcount = nchtotal.ncs_longhits + nchtotal.ncs_longmiss;
        if (state == TIME) {
                s1.nchcount = s.nchcount;
                s1.nchpathcount = s.nchpathcount;
        }

#define LOADCOLS        49      /* Don't but into the 'free' value */
#define LOADRANGE       (100.0 / LOADCOLS)

        psiz = 0;
        f2 = 0.0;
        for (lc = 0; lc < CPUSTATES; lc++) {
                uint64_t val = *(uint64_t *)(((uint8_t *)&s.cp_time) +
                               cpuoffsets[lc]);
                f1 = 100.0 * val / total_time;
                f2 += f1;
                l = (int)((f2 + (LOADRANGE / 2.0)) / LOADRANGE) - psiz;
                if (f1 > 99.9)
                        f1 = 99.9;      /* no room to display 100.0 */
                putfloat(f1, GRAPHROW, GRAPHCOL + 10 * lc, 4, 1, 0);
                move(GRAPHROW + 2, psiz);
                psiz += l;
                while (l-- > 0)
                        addch(cpuchar[lc]);
        }

        put64(ucount(), STATROW, STATCOL, 3, 'D');
        putfloat(avenrun[0], STATROW, STATCOL + 18, 6, 2, 0);
        putfloat(avenrun[1], STATROW, STATCOL + 25, 6, 2, 0);
        putfloat(avenrun[2], STATROW, STATCOL + 32, 6, 2, 0);
        mvaddstr(STATROW, STATCOL + 53, buf);
#define pgtokb(pg) (int64_t)((intmax_t)(pg) * vms.v_page_size / 1024)
#define pgtomb(pg) (int64_t)((intmax_t)(pg) * vms.v_page_size / (1024 * 1024))
#define pgtob(pg)  (int64_t)((intmax_t)(pg) * vms.v_page_size)

        put64(pgtob(vms.v_active_count), MEMROW + 0, MEMCOLA + 7, 6, 0);
        put64(pgtob(vms.v_wire_count), MEMROW + 1, MEMCOLA + 7, 6, 0); /*XXX*/
        put64(pgtob(vms.v_inactive_count +
                    vms.v_cache_count +
                    vms.v_free_count), MEMROW + 2, MEMCOLA + 7, 6, 0);
        put64(s.physmem, MEMROW + 3, MEMCOLA + 7, 6, 0);
        put64(pgtob(total.t_arm),
                        MEMROW + 0, MEMCOLB + 5, 6, 0);
        put64(pgtob(total.t_avm + total.t_avmshr),
                        MEMROW + 0, MEMCOLB + 19, 6, 0);
        put64(pgtob(total.t_vm - total.t_rm),
                        MEMROW + 1, MEMCOLB + 5, 6, 0);
        put64(pgtob(s.kvmsw[kvnsw].ksw_total),
                        MEMROW + 1, MEMCOLB + 19, 6, 0);

#if 0
        put64(pgtob(total.t_arm), MEMROW + 2, MEMCOL + 4, 6, 0);
        put64(pgtob(total.t_armshr), MEMROW + 2, MEMCOL + 11, 6, 0);
        put64(pgtob(total.t_avm), MEMROW + 2, MEMCOL + 19, 6, 0);
        put64(pgtob(total.t_avmshr), MEMROW + 2, MEMCOL + 26, 6, 0);
        put64(pgtob(total.t_rm), MEMROW + 3, MEMCOL + 4, 6, 0);
        put64(pgtob(total.t_rmshr), MEMROW + 3, MEMCOL + 11, 6, 0);
        put64(pgtob(total.t_vm), MEMROW + 3, MEMCOL + 19, 6, 0);
        put64(pgtob(total.t_vmshr), MEMROW + 3, MEMCOL + 26, 6, 0);
        put64(pgtob(total.t_free), MEMROW + 2, MEMCOL + 34, 6, 0);
#endif

        put64(total.t_rq - 1, PROCSROW + 1, PROCSCOL + 0, 4, 'D');
        put64(total.t_pw, PROCSROW + 1, PROCSCOL + 4, 4, 'D');
        put64(total.t_dw, PROCSROW + 1, PROCSCOL + 8, 4, 'D');
        put64(total.t_sl, PROCSROW + 1, PROCSCOL + 12, 4, 'D');
        /*put64(total.t_sw, PROCSROW + 1, PROCSCOL + 12, 3, 'D');*/
        if (extended_vm_stats == 0) {
                PUTRATE_PGTOB(Vmm.v_zfod, VMSTATROW + 0, VMSTATCOL, 7);
        }
        PUTRATE_PGTOB(Vmm.v_cow_faults, VMSTATROW + 1, VMSTATCOL, 7);
        put64(pgtob(vms.v_wire_count), VMSTATROW + 2, VMSTATCOL, 7, 0);
        put64(pgtob(vms.v_active_count), VMSTATROW + 3, VMSTATCOL, 7, 0);
        put64(pgtob(vms.v_inactive_count), VMSTATROW + 4, VMSTATCOL, 7, 0);
        put64(pgtob(vms.v_cache_count), VMSTATROW + 5, VMSTATCOL, 7, 0);
        put64(pgtob(vms.v_free_count), VMSTATROW + 6, VMSTATCOL, 7, 0);
        PUTRATE(Vmm.v_dfree, VMSTATROW + 7, VMSTATCOL, 7);
        PUTRATE(Vmm.v_pfree, VMSTATROW + 8, VMSTATCOL, 7);
        PUTRATE(Vmm.v_reactivated, VMSTATROW + 9, VMSTATCOL, 7);
        PUTRATE(Vmm.v_pdwakeups, VMSTATROW + 10, VMSTATCOL, 7);
        PUTRATE(Vmm.v_pdpages, VMSTATROW + 11, VMSTATCOL, 7);
        PUTRATE(Vmm.v_intrans, VMSTATROW + 12, VMSTATCOL, 7);

        if (extended_vm_stats) {
                int64_t orig_zfod = s.Vmm.v_zfod;
                s.Vmm.v_zfod -= s.Vmm.v_ozfod;
                PUTRATE_PGTOB(Vmm.v_zfod, VMSTATROW + 11, VMSTATCOL - 14, 7);
                PUTRATE_PGTOB(Vmm.v_ozfod, VMSTATROW + 12, VMSTATCOL - 14, 7);
#define nz(x)   ((x) ? (x) : 1)
                put64((s.Vmm.v_zfod) * 100 / nz(orig_zfod),
                    VMSTATROW + 13, VMSTATCOL - 14, 7, 'D');
#undef nz
                PUTRATE_PGTOB(Vmm.v_tfree, VMSTATROW + 14, VMSTATCOL - 14, 7);
        }

        put64(s.bufspace, VMSTATROW + 13, VMSTATCOL, 7, 0);
        put64(s.dirtybufspace/1024, VMSTATROW + 14, VMSTATCOL, 7, 'K');
        put64(s.activevnodes, VMSTATROW + 15, VMSTATCOL, 7, 'D');
        put64(s.cachedvnodes, VMSTATROW + 16, VMSTATCOL, 7, 'D');
        put64(s.inactivevnodes, VMSTATROW + 17, VMSTATCOL, 7, 'D');
        PUTRATE_PGTOB(Vmm.v_vnodepgsin, PAGEROW + 2, PAGECOL + 7, 5);
        PUTRATE_PGTOB(Vmm.v_vnodepgsout, PAGEROW + 2, PAGECOL + 13, 5);
        PUTRATE_PGTOB(Vmm.v_swappgsin, PAGEROW + 2, PAGECOL + 21, 5);
        PUTRATE_PGTOB(Vmm.v_swappgsout, PAGEROW + 2, PAGECOL + 27, 5);
        PUTRATE(Vmm.v_vnodein, PAGEROW + 3, PAGECOL + 7, 5);
        PUTRATE(Vmm.v_vnodeout, PAGEROW + 3, PAGECOL + 13, 5);
        PUTRATE(Vmm.v_swapin, PAGEROW + 3, PAGECOL + 21, 5);
        PUTRATE(Vmm.v_swapout, PAGEROW + 3, PAGECOL + 27, 5);
        PUTRATE(Vmm.v_swtch, GENSTATROW + 1, GENSTATCOL + 1, 4);
        PUTRATE(Vmm.v_trap, GENSTATROW + 1, GENSTATCOL + 6, 4);
        PUTRATE(Vmm.v_syscall, GENSTATROW + 1, GENSTATCOL + 11, 4);
        PUTRATE(Vmm.v_intr, GENSTATROW + 1, GENSTATCOL + 16, 4);
        PUTRATE(Vmm.v_soft, GENSTATROW + 1, GENSTATCOL + 21, 4);
        PUTRATE(Vmm.v_vm_faults, GENSTATROW + 1, GENSTATCOL + 26, 4);
        mvprintw(DISKROW, DISKCOL + 5, "                              ");
        for (i = 0, lc = 0; i < num_devices && lc < MAXDRIVES; i++)
                if (dev_select[i].selected) {
                        char tmpstr[80];
                        sprintf(tmpstr, "%s%d", dev_select[i].device_name,
                                dev_select[i].unit_number);
                        mvprintw(DISKROW, DISKCOL + 5 + 6 * lc,
                                " %5.5s", tmpstr);
                        switch(state) {
                        case TIME:
                                dinfo(i, ++lc, &cur, &last);
                                break;
                        case RUN:
                                dinfo(i, ++lc, &cur, &run);
                                break;
                        case BOOT:
                                dinfo(i, ++lc, &cur, NULL);
                                break;
                        }
                }
#define nz(x)   ((x) ? (x) : 1)
        put64(s.nchpathcount, NAMEIROW + 1, NAMEICOL + 6, 6, 'D');
        PUTRATE(Vmm.v_exec, EXECROW + 1, EXECCOL, 5);
        put64(nchtotal.ncs_longhits, NAMEIROW + 1, NAMEICOL + 13, 6, 'D');
        putfloat(nchtotal.ncs_longhits * 100.0 / nz(s.nchpathcount),
            NAMEIROW + 1, NAMEICOL + 19, 4, 0, 0);

        putfloat((double)s.nchcount / nz(s.nchpathcount),
            NAMEIROW + 1, NAMEICOL + 27, 5, 2, 1);
#undef nz
}

int
cmdkre(const char *cmd, char *args)
{
        int retval;

        if (prefix(cmd, "run")) {
                retval = 1;
                copyinfo(&s2, &s1);
                switch (getdevs(&run)) {
                case -1:
                        errx(1, "%s", devstat_errbuf);
                        break;
                case 1:
                        num_devices = run.dinfo->numdevs;
                        generation = run.dinfo->generation;
                        retval = dscmd("refresh", NULL, MAXDRIVES, &cur);
                        if (retval == 2)
                                labelkre();
                        break;
                default:
                        break;
                }
                state = RUN;
                return (retval);
        }
        if (prefix(cmd, "boot")) {
                state = BOOT;
                copyinfo(&z, &s1);
                return (1);
        }
        if (prefix(cmd, "time")) {
                state = TIME;
                return (1);
        }
        if (prefix(cmd, "zero")) {
                retval = 1;
                if (state == RUN) {
                        getinfo(&s1);
                        switch (getdevs(&run)) {
                        case -1:
                                errx(1, "%s", devstat_errbuf);
                                break;
                        case 1:
                                num_devices = run.dinfo->numdevs;
                                generation = run.dinfo->generation;
                                retval = dscmd("refresh",NULL, MAXDRIVES, &cur);
                                if (retval == 2)
                                        labelkre();
                                break;
                        default:
                                break;
                        }
                }
                return (retval);
        }
        retval = dscmd(cmd, args, MAXDRIVES, &cur);

        if (retval == 2)
                labelkre();

        return(retval);
}

/* calculate number of users on the system */
static int
ucount(void)
{
        struct utmpentry *ep = NULL;    /* avoid gcc warnings */
        int nusers = 0;

        getutentries(NULL, &ep);
        for (; ep; ep = ep->next)
                nusers++;

        return (nusers);
}

static void
put64(intmax_t n, int l, int lc, int w, int type)
{
        char b[128];
        int isneg;
        int i;
        int64_t d;
        int64_t u;

        move(l, lc);
        if (n == 0) {
                while (w-- > 0)
                        addch(' ');
                return;
        }
        if (type == 0 || type == 'D')
                snprintf(b, sizeof(b), "%*jd", w, n);
        else
                snprintf(b, sizeof(b), "%*jd%c", w - 1, n, type);
        if (strlen(b) <= (size_t)w) {
                addstr(b);
                return;
        }

        if (type == 'D')
                u = 1000;
        else
                u = 1024;
        if (n < 0) {
                n = -n;
                isneg = 1;
        } else {
                isneg = 0;
        }

        for (d = 1; n / d >= 1000; d *= u) {
                switch(type) {
                case 'D':
                case 0:
                        type = 'K';
                        break;
                case 'K':
                        type = 'M';
                        break;
                case 'M':
                        type = 'G';
                        break;
                case 'G':
                        type = 'T';
                        break;
                case 'T':
                        type = 'X';
                        break;
                default:
                        type = '?';
                        break;
                }
        }

        i = w - isneg;
        if (n / d >= 100)
                i -= 3;
        else if (n / d >= 10)
                i -= 2;
        else
                i -= 1;
        if (i > 4) {
                snprintf(b + 64, sizeof(b) - 64, "%jd.%03jd%c",
                         n / d, n / (d / 1000) % 1000, type);
        } else if (i > 3) {
                snprintf(b + 64, sizeof(b) - 64, "%jd.%02jd%c",
                         n / d, n / (d / 100) % 100, type);
        } else if (i > 2) {
                snprintf(b + 64, sizeof(b) - 64, "%jd.%01jd%c",
                         n / d, n / (d / 10) % 10, type);
        } else {
                snprintf(b + 64, sizeof(b) - 64, "%jd%c",
                         n / d, type);
        }
        w -= strlen(b + 64);
        i = 64;
        if (isneg) {
                b[--i] = '-';
                --w;
        }
        while (w > 0) {
                --w;
                b[--i] = ' ';
        }
        addstr(b + i);
}

static void
putfloat(double f, int l, int lc, int w, int d, int nz)
{
        char b[128];

        move(l, lc);
        if (nz && f == 0.0) {
                while (--w >= 0)
                        addch(' ');
                return;
        }
        snprintf(b, sizeof(b), "%*.*f", w, d, f);
        if (strlen(b) > (size_t)w)
                snprintf(b, sizeof(b), "%*.0f", w, f);
        if (strlen(b) > (size_t)w) {
                while (--w >= 0)
                        addch('*');
                return;
        }
        addstr(b);
}

static void
putlongdouble(long double f, int l, int lc, int w, int d, int nz)
{
        char b[128];

        move(l, lc);
        if (nz && f == 0.0) {
                while (--w >= 0)
                        addch(' ');
                return;
        }
        sprintf(b, "%*.*Lf", w, d, f);
        if (strlen(b) > (size_t)w)
                sprintf(b, "%*.0Lf", w, f);
        if (strlen(b) > (size_t)w) {
                while (--w >= 0)
                        addch('*');
                return;
        }
        addstr(b);
}

static void
putlongdoublez(long double f, int l, int lc, int w, int d, int nz)
{
        char b[128];

        if (f == 0.0) {
                move(l, lc);
                sprintf(b, "%*.*s", w, w, "");
                addstr(b);
        } else {
                putlongdouble(f, l, lc, w, d, nz);
        }
}

static void
getinfo(struct Info *ls)
{
        struct devinfo *tmp_dinfo;
        struct nchstats *nch_tmp;
        size_t size;
        size_t vms_size = sizeof(ls->Vms);
        size_t vmm_size = sizeof(ls->Vmm);
        size_t nch_size = sizeof(ls->nchstats) * SMP_MAXCPU;
        size_t phys_size = sizeof(ls->physmem);

        kvnsw = kvm_getswapinfo(kd, ls->kvmsw, NKVMSW, 0);

        if (sysctlbyname("vm.vmstats", &ls->Vms, &vms_size, NULL, 0)) {
                perror("sysctlbyname: vm.vmstats");
                exit(1);
        }
        if (sysctlbyname("vm.vmmeter", &ls->Vmm, &vmm_size, NULL, 0)) {
                perror("sysctlbyname: vm.vmstats");
                exit(1);
        }
        if (sysctlbyname("hw.physmem", &ls->physmem, &phys_size, NULL, 0)) {
                perror("sysctlbyname: hw.physmem");
                exit(1);
        }

        if (kinfo_get_sched_cputime(&ls->cp_time))
                err(1, "kinfo_get_sched_cputime");
        if (kinfo_get_sched_cputime(&cp_time))
                err(1, "kinfo_get_sched_cputime");
        NREAD(X_BUFFERSPACE, &ls->bufspace, sizeof(ls->bufspace));
        NREAD(X_DESIREDVNODES, &ls->maxvnodes, sizeof(ls->maxvnodes));
        NREAD(X_CACHEDVNODES, &ls->cachedvnodes, sizeof(ls->cachedvnodes));
        NREAD(X_INACTIVEVNODES, &ls->inactivevnodes,
                                                sizeof(ls->inactivevnodes));
        NREAD(X_ACTIVEVNODES, &ls->activevnodes, sizeof(ls->activevnodes));
        NREAD(X_NUMDIRTYBUFFERS, &ls->dirtybufspace, sizeof(ls->dirtybufspace));

        if (nintr) {
                size = nintr * sizeof(ls->intrcnt[0]);
                sysctlbyname("hw.intrcnt_all", ls->intrcnt, &size, NULL, 0);
        }
        size = sizeof(ls->Total);
        if (sysctlbyname("vm.vmtotal", &ls->Total, &size, NULL, 0) < 0) {
                error("Can't get kernel info: %s\n", strerror(errno));
                bzero(&ls->Total, sizeof(ls->Total));
        }

        if ((nch_tmp = malloc(nch_size)) == NULL) {
                perror("malloc");
                exit(1);
        } else {
                if (sysctlbyname("vfs.cache.nchstats", nch_tmp, &nch_size, NULL, 0)) {
                        perror("sysctlbyname vfs.cache.nchstats");
                        free(nch_tmp);
                        exit(1);
                } else {
                        if ((nch_tmp = realloc(nch_tmp, nch_size)) == NULL) {
                                perror("realloc");
                                exit(1);
                        }
                }
        }

        if (kinfo_get_cpus(&ncpu))
                err(1, "kinfo_get_cpus");
        kvm_nch_cpuagg(nch_tmp, &ls->nchstats, ncpu);
        free(nch_tmp);

        tmp_dinfo = last.dinfo;
        last.dinfo = cur.dinfo;
        cur.dinfo = tmp_dinfo;

        last.busy_time = cur.busy_time;
        switch (getdevs(&cur)) {
        case -1:
                errx(1, "%s", devstat_errbuf);
                break;
        case 1:
                num_devices = cur.dinfo->numdevs;
                generation = cur.dinfo->generation;
                cmdkre("refresh", NULL);
                break;
        default:
                break;
        }
}

static void
allocinfo(struct Info *ls)
{
        ls->intrcnt = (long *) calloc(nintr, sizeof(long));
        if (ls->intrcnt == NULL)
                errx(2, "out of memory");
}

static void
copyinfo(struct Info *from, struct Info *to)
{
        long *intrcnt;

        /*
         * time, wds, seek, and xfer are malloc'd so we have to
         * save the pointers before the structure copy and then
         * copy by hand.
         */
        intrcnt = to->intrcnt;
        *to = *from;

        bcopy(from->intrcnt, to->intrcnt = intrcnt, nintr * sizeof (int));
}

static void
dinfo(int dn, int lc, struct statinfo *now, struct statinfo *then)
{
        long double kb_per_transfer;
        long double transfers_per_secondr;
        long double transfers_per_secondw;
        long double mb_per_secondr;
        long double mb_per_secondw;
        long double elapsed_time, device_busy;
        int di;

        di = dev_select[dn].position;

        elapsed_time = compute_etime(now->busy_time, then ?
                                     then->busy_time :
                                     now->dinfo->devices[di].dev_creation_time);

        device_busy =  compute_etime(now->dinfo->devices[di].busy_time, then ?
                                     then->dinfo->devices[di].busy_time :
                                     now->dinfo->devices[di].dev_creation_time);

        if (compute_stats(
                          &now->dinfo->devices[di],
                          (then ? &then->dinfo->devices[di] : NULL),
                          elapsed_time,
                          NULL, NULL, NULL,
                          &kb_per_transfer,
                          NULL,
                          NULL,
                          NULL, NULL) != 0)
                errx(1, "%s", devstat_errbuf);

        if (compute_stats_read(
                          &now->dinfo->devices[di],
                          (then ? &then->dinfo->devices[di] : NULL),
                          elapsed_time,
                          NULL, NULL, NULL,
                          NULL,
                          &transfers_per_secondr,
                          &mb_per_secondr,
                          NULL, NULL) != 0)
                errx(1, "%s", devstat_errbuf);

        if (compute_stats_write(
                          &now->dinfo->devices[di],
                          (then ? &then->dinfo->devices[di] : NULL),
                          elapsed_time,
                          NULL, NULL, NULL,
                          NULL,
                          &transfers_per_secondw,
                          &mb_per_secondw,
                          NULL, NULL) != 0)
                errx(1, "%s", devstat_errbuf);

#if 0
        /*
         * Remove this hack, it no longer works properly and will
         * report 100% busy in situations where the device is able
         * to respond to the requests faster than the busy counter's
         * granularity.
         */
        if ((device_busy == 0) &&
            (transfers_per_secondr > 5 || transfers_per_secondw > 5)) {
                /* the device has been 100% busy, fake it because
                 * as long as the device is 100% busy the busy_time
                 * field in the devstat struct is not updated */
                device_busy = elapsed_time;
        }
#endif
        if (device_busy > elapsed_time) {
                /* this normally happens after one or more periods
                 * where the device has been 100% busy, correct it */
                device_busy = elapsed_time;
        }

        lc = DISKCOL + lc * 6;
        putlongdoublez(kb_per_transfer, DISKROW + 1, lc, 5, 2, 0);
        putlongdoublez(transfers_per_secondr, DISKROW + 2, lc, 5, 0, 0);
        putlongdoublez(mb_per_secondr, DISKROW + 3, lc, 5, 2, 0);
        putlongdoublez(transfers_per_secondw, DISKROW + 4, lc, 5, 0, 0);
        putlongdoublez(mb_per_secondw, DISKROW + 5, lc, 5, 2, 0);
        putlongdouble(device_busy * 100 / elapsed_time,
                                      DISKROW + 6, lc, 5, 0, 0);
}