text: /*-
   * 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.
   * 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 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.
   */
  
  #include <sys/cdefs.h>
  
  __FBSDID("$FreeBSD: soc2013/dpl/head/usr.bin/systat/vmstat.c 249848 2013-03-23 13:11:54Z mav $");
  
  #ifdef lint
  static const char sccsid[] = "@(#)vmstat.c	8.2 (Berkeley) 1/12/94";
  #endif
  
  /*
   * Cursed vmstat -- from Robert Elz.
   */
  
  #include <sys/param.h>
  #include <sys/stat.h>
  #include <sys/time.h>
  #include <sys/proc.h>
  #include <sys/uio.h>
  #include <sys/namei.h>
  #include <sys/resource.h>
  #include <sys/sysctl.h>
  #include <sys/vmmeter.h>
  
  #include <vm/vm_param.h>
  
  #include <ctype.h>
  #include <err.h>
  #include <errno.h>
  #include <langinfo.h>
  #include <nlist.h>
  #include <paths.h>
  #include <signal.h>
  #include <stdlib.h>
  #include <string.h>
  #include <time.h>
  #include <unistd.h>
  #include <utmpx.h>
  #include <devstat.h>
  #include "systat.h"
  #include "extern.h"
  #include "devs.h"
  
  static struct Info {
  	long	time[CPUSTATES];
  	u_int v_swtch;		/* context switches */
  	u_int v_trap;		/* calls to trap */
  	u_int v_syscall;	/* calls to syscall() */
  	u_int v_intr;		/* device interrupts */
  	u_int v_soft;		/* software interrupts */
  	/*
  	 * Virtual memory activity.
  	 */
  	u_int v_vm_faults;	/* number of address memory faults */
  	u_int v_io_faults;	/* page faults requiring I/O */
  	u_int v_cow_faults;	/* number of copy-on-writes */
  	u_int v_zfod;		/* pages zero filled on demand */
  	u_int v_ozfod;		/* optimized zero fill pages */
  	u_int v_swapin;		/* swap pager pageins */
  	u_int v_swapout;	/* swap pager pageouts */
  	u_int v_swappgsin;	/* swap pager pages paged in */
  	u_int v_swappgsout;	/* swap pager pages paged out */
  	u_int v_vnodein;	/* vnode pager pageins */
  	u_int v_vnodeout;	/* vnode pager pageouts */
  	u_int v_vnodepgsin;	/* vnode_pager pages paged in */
  	u_int v_vnodepgsout;	/* vnode pager pages paged out */
  	u_int v_intrans;	/* intransit blocking page faults */
  	u_int v_reactivated;	/* number of pages reactivated from free list */
  	u_int v_pdwakeups;	/* number of times daemon has awaken from sleep */
  	u_int v_pdpages;	/* number of pages analyzed by daemon */
  
  	u_int v_dfree;		/* pages freed by daemon */
  	u_int v_pfree;		/* pages freed by exiting processes */
  	u_int v_tfree;		/* total pages freed */
  	/*
  	 * Distribution of page usages.
  	 */
  	u_int v_page_size;	/* page size in bytes */
  	u_int v_free_count;	/* number of pages free */
  	u_int v_wire_count;	/* number of pages wired down */
  	u_int v_active_count;	/* number of pages active */
  	u_int v_inactive_count;	/* number of pages inactive */
  	u_int v_cache_count;	/* number of pages on buffer cache queue */
  	struct	vmtotal Total;
  	struct	nchstats nchstats;
  	long	nchcount;
  	long	*intrcnt;
  	long	bufspace;
  	int	desiredvnodes;
  	long	numvnodes;
  	long	freevnodes;
  	int	numdirtybuffers;
  } s, s1, s2, z;
  
  struct statinfo cur, last, run;
  
  #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 float cputime(int);
  static void dinfo(int, int, struct statinfo *, struct statinfo *);
  static void getinfo(struct Info *);
  static void putint(int, int, int, int);
  static void putfloat(double, int, int, int, int, int);
  static void putlongdouble(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	long *intrloc;
  static	char **intrname;
  static	int nextintsrow;
  
  WINDOW *
  openkre(void)
  {
  
  	return (stdscr);
  }
  
  void
  closekre(WINDOW *w)
  {
  
  	if (w == NULL)
  		return;
  	wclear(w);
  	wrefresh(w);
  }
  
  /*
   * These constants define where the major pieces are laid out
   */
  #define STATROW		 0	/* uses 1 row and 67 cols */
  #define STATCOL		 0
  #define MEMROW		 2	/* uses 4 rows and 45 cols */
  #define MEMCOL		 0
  #define PAGEROW		 2	/* uses 4 rows and 30 cols */
  #define PAGECOL		47
  #define INTSROW		 6	/* uses all rows to bottom and 16 cols */
  #define INTSCOL		64
  #define PROCSROW	 6	/* uses 3 rows and 19 cols */
  #define PROCSCOL	 0
  #define GENSTATROW	 7	/* uses 2 rows and 29 cols */
  #define GENSTATCOL	21
  #define VMSTATROW	 7	/* uses 17 rows and 12-14 cols */
  #define VMSTATCOL	49	/* actually 50-51 for some fields */
  #define GRAPHROW	10	/* uses 3 rows and 49-51 cols */
  #define GRAPHCOL	 0
  #define VNSTATROW	13	/* uses 4 rows and 13 columns */
  #define VNSTATCOL	35
  #define NAMEIROW	14	/* uses 3 rows and 32 cols */
  #define NAMEICOL	 0
  #define DISKROW		18	/* uses 5 rows and 47 cols (for 7 drives) */
  #define DISKCOL		 0
  
  #define	DRIVESPACE	 7	/* max # for space */
  
  #define	MAXDRIVES	DRIVESPACE	 /* max # to display */
  
  int
  initkre(void)
  {
  	char *cp, *cp1, *cp2, *intrnamebuf, *nextcp;
  	int i;
  	size_t sz;
  
  	if ((num_devices = devstat_getnumdevs(NULL)) < 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.intrcnt", NULL, &sz, NULL, 0) == -1) {
  			error("sysctl(hw.intrcnt...) failed: %s",
  			      strerror(errno));
  			return (0);
  		}
  		nintr = sz / sizeof(u_long);
  		intrloc = calloc(nintr, sizeof (long));
  		intrname = calloc(nintr, sizeof (char *));
  		intrnamebuf = sysctl_dynread("hw.intrnames", NULL);
  		if (intrnamebuf == NULL || intrname == NULL ||
  		    intrloc == NULL) {
  			error("Out of memory");
  			if (intrnamebuf)
  				free(intrnamebuf);
  			if (intrname)
  				free(intrname);
  			if (intrloc)
  				free(intrloc);
  			nintr = 0;
  			return(0);
  		}
  		for (cp = intrnamebuf, i = 0; i < nintr; i++) {
  			nextcp = cp + strlen(cp) + 1;
  
  			/* Discard trailing spaces. */
  			for (cp1 = nextcp - 1; cp1 > cp && *(cp1 - 1) == ' '; )
  				*--cp1 = '\0';
  
  			/* Convert "irqN: name" to "name irqN". */
  			if (strncmp(cp, "irq", 3) == 0) {
  				cp1 = cp + 3;
  				while (isdigit((u_char)*cp1))
  					cp1++;
  				if (cp1 != cp && *cp1 == ':' &&
  				    *(cp1 + 1) == ' ') {
  					sz = strlen(cp);
  					*cp1 = '\0';
  					cp1 = cp1 + 2;
  					cp2 = strdup(cp);
  					bcopy(cp1, cp, sz - (cp1 - cp) + 1);
  					if (sz <= 10 + 4) {
  						strcat(cp, " ");
  						strcat(cp, cp2 + 3);
  					}
  					free(cp2);
  				}
  			}
  
  			/*
  			 * Convert "name irqN" to "name N" if the former is
  			 * longer than the field width.
  			 */
  			if ((cp1 = strstr(cp, "irq")) != NULL &&
  			    strlen(cp) > 10)
  				bcopy(cp1 + 3, cp1, strlen(cp1 + 3) + 1);
  
  			intrname[i] = cp;
  			cp = nextcp;
  		}
  		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 + 6, "users    Load");
  	mvprintw(MEMROW, MEMCOL, "Mem:KB    REAL            VIRTUAL");
  	mvprintw(MEMROW + 1, MEMCOL, "        Tot   Share      Tot    Share");
  	mvprintw(MEMROW + 2, MEMCOL, "Act");
  	mvprintw(MEMROW + 3, MEMCOL, "All");
  
  	mvprintw(MEMROW + 1, MEMCOL + 41, "Free");
  
  	mvprintw(PAGEROW, PAGECOL,     "         VN PAGER   SWAP PAGER");
  	mvprintw(PAGEROW + 1, PAGECOL, "         in   out     in   out");
  	mvprintw(PAGEROW + 2, PAGECOL, "count");
  	mvprintw(PAGEROW + 3, PAGECOL, "pages");
  
  	mvprintw(INTSROW, INTSCOL + 1, "Interrupts");
  	mvprintw(INTSROW + 1, INTSCOL + 6, "total");
  
  	mvprintw(VMSTATROW, VMSTATCOL + 9, "ioflt");
  	mvprintw(VMSTATROW + 1, VMSTATCOL + 9, "cow");
  	mvprintw(VMSTATROW + 2, VMSTATCOL + 9, "zfod");
  	mvprintw(VMSTATROW + 3, VMSTATCOL + 9, "ozfod");
  	mvprintw(VMSTATROW + 4, VMSTATCOL + 9 - 1, "%%ozfod");
  	mvprintw(VMSTATROW + 5, VMSTATCOL + 9, "daefr");
  	mvprintw(VMSTATROW + 6, VMSTATCOL + 9, "prcfr");
  	mvprintw(VMSTATROW + 7, VMSTATCOL + 9, "totfr");
  	mvprintw(VMSTATROW + 8, VMSTATCOL + 9, "react");
  	mvprintw(VMSTATROW + 9, VMSTATCOL + 9, "pdwak");
  	mvprintw(VMSTATROW + 10, VMSTATCOL + 9, "pdpgs");
  	mvprintw(VMSTATROW + 11, VMSTATCOL + 9, "intrn");
  	mvprintw(VMSTATROW + 12, VMSTATCOL + 9, "wire");
  	mvprintw(VMSTATROW + 13, VMSTATCOL + 9, "act");
  	mvprintw(VMSTATROW + 14, VMSTATCOL + 9, "inact");
  	mvprintw(VMSTATROW + 15, VMSTATCOL + 9, "cache");
  	mvprintw(VMSTATROW + 16, VMSTATCOL + 9, "free");
  	if (LINES - 1 > VMSTATROW + 17)
  		mvprintw(VMSTATROW + 17, VMSTATCOL + 9, "buf");
  
  	mvprintw(GENSTATROW, GENSTATCOL, " Csw  Trp  Sys  Int  Sof  Flt");
  
  	mvprintw(GRAPHROW, GRAPHCOL,
  		"  . %%Sys    . %%Intr   . %%User   . %%Nice   . %%Idle");
  	mvprintw(PROCSROW, PROCSCOL, "Proc:");
  	mvprintw(PROCSROW + 1, PROCSCOL, "  r   p   d   s   w");
  	mvprintw(GRAPHROW + 1, GRAPHCOL,
  		"|    |    |    |    |    |    |    |    |    |    |");
  
  	mvprintw(VNSTATROW, VNSTATCOL + 8, "dtbuf");
  	mvprintw(VNSTATROW + 1, VNSTATCOL + 8, "desvn");
  	mvprintw(VNSTATROW + 2, VNSTATCOL + 8, "numvn");
  	mvprintw(VNSTATROW + 3, VNSTATCOL + 8, "frevn");
  
  	mvprintw(NAMEIROW, NAMEICOL, "Namei     Name-cache   Dir-cache");
  	mvprintw(NAMEIROW + 1, NAMEICOL,
  		"   Calls    hits   %%    hits   %%");
  	mvprintw(DISKROW, DISKCOL, "Disks");
  	mvprintw(DISKROW + 1, DISKCOL, "KB/t");
  	mvprintw(DISKROW + 2, DISKCOL, "tps");
  	mvprintw(DISKROW + 3, DISKCOL, "MB/s");
  	mvprintw(DISKROW + 4, 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.
  	 */
  	/* mvprintw(DISKROW + 4, DISKCOL, " msps"); */
  	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++;
  		}
  
  	for (i = 0; i < nintr; i++) {
  		if (intrloc[i] == 0)
  			continue;
  		mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s", intrname[i]);
  	}
  }
  
  #define X(fld)	{t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
  #define Q(fld)	{t=cur.fld[i]; cur.fld[i]-=last.fld[i]; if(state==TIME) last.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) \
  do { \
  	Y(fld); \
  	putint((int)((float)s.fld/etime + 0.5), l, c, w); \
  } while (0)
  #define MAXFAIL 5
  
  static	char cpuchar[CPUSTATES] = { '=' , '+', '>', '-', ' ' };
  static	char cpuorder[CPUSTATES] = { CP_SYS, CP_INTR, CP_USER, CP_NICE,
  				     CP_IDLE };
  
  void
  showkre(void)
  {
  	float f1, f2;
  	int psiz, inttotal;
  	int i, l, lc;
  	static int failcnt = 0;
  
  	etime = 0;
  	for(i = 0; i < CPUSTATES; i++) {
  		X(time);
  		Q(cp_time);
  		etime += s.time[i];
  	}
  	if (etime < 5.0) {	/* < 5 ticks - 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 /= hertz;
  	etime /= ncpu;
  	inttotal = 0;
  	for (i = 0; i < nintr; i++) {
  		if (s.intrcnt[i] == 0)
  			continue;
  		X(intrcnt);
  		l = (int)((float)s.intrcnt[i]/etime + 0.5);
  		inttotal += l;
  		if (intrloc[i] == 0) {
  			if (nextintsrow == LINES)
  				continue;
  			intrloc[i] = nextintsrow++;
  			mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s",
  				intrname[i]);
  		}
  		putint(l, intrloc[i], INTSCOL, 5);
  	}
  	putint(inttotal, INTSROW + 1, INTSCOL, 5);
  	Z(ncs_goodhits); Z(ncs_badhits); Z(ncs_miss);
  	Z(ncs_long); Z(ncs_pass2); Z(ncs_2passes); Z(ncs_neghits);
  	s.nchcount = nchtotal.ncs_goodhits + nchtotal.ncs_badhits +
  	    nchtotal.ncs_miss + nchtotal.ncs_long + nchtotal.ncs_neghits;
  	if (state == TIME)
  		s1.nchcount = s.nchcount;
  
  	psiz = 0;
  	f2 = 0.0;
  	for (lc = 0; lc < CPUSTATES; lc++) {
  		i = cpuorder[lc];
  		f1 = cputime(i);
  		f2 += f1;
  		l = (int) ((f2 + 1.0) / 2.0) - psiz;
  		putfloat(f1, GRAPHROW, GRAPHCOL + 10 * lc, 4, 1, 0);
  		move(GRAPHROW + 2, psiz);
  		psiz += l;
  		while (l-- > 0)
  			addch(cpuchar[lc]);
  	}
  
  	putint(ucount(), STATROW, STATCOL, 5);
  	putfloat(avenrun[0], STATROW, STATCOL + 20, 5, 2, 0);
  	putfloat(avenrun[1], STATROW, STATCOL + 26, 5, 2, 0);
  	putfloat(avenrun[2], STATROW, STATCOL + 32, 5, 2, 0);
  	mvaddstr(STATROW, STATCOL + 55, buf);
  #define pgtokb(pg)	((pg) * (s.v_page_size / 1024))
  	putint(pgtokb(total.t_arm), MEMROW + 2, MEMCOL + 4, 7);
  	putint(pgtokb(total.t_armshr), MEMROW + 2, MEMCOL + 12, 7);
  	putint(pgtokb(total.t_avm), MEMROW + 2, MEMCOL + 20, 8);
  	putint(pgtokb(total.t_avmshr), MEMROW + 2, MEMCOL + 29, 8);
  	putint(pgtokb(total.t_rm), MEMROW + 3, MEMCOL + 4, 7);
  	putint(pgtokb(total.t_rmshr), MEMROW + 3, MEMCOL + 12, 7);
  	putint(pgtokb(total.t_vm), MEMROW + 3, MEMCOL + 20, 8);
  	putint(pgtokb(total.t_vmshr), MEMROW + 3, MEMCOL + 29, 8);
  	putint(pgtokb(total.t_free), MEMROW + 2, MEMCOL + 38, 7);
  	putint(total.t_rq - 1, PROCSROW + 2, PROCSCOL, 3);
  	putint(total.t_pw, PROCSROW + 2, PROCSCOL + 4, 3);
  	putint(total.t_dw, PROCSROW + 2, PROCSCOL + 8, 3);
  	putint(total.t_sl, PROCSROW + 2, PROCSCOL + 12, 3);
  	putint(total.t_sw, PROCSROW + 2, PROCSCOL + 16, 3);
  	PUTRATE(v_io_faults, VMSTATROW, VMSTATCOL + 2, 8 - 2);
  	PUTRATE(v_cow_faults, VMSTATROW + 1, VMSTATCOL + 2, 8 - 2);
  	PUTRATE(v_zfod, VMSTATROW + 2, VMSTATCOL + 2, 8 - 2);
  	PUTRATE(v_ozfod, VMSTATROW + 3, VMSTATCOL, 8);
  	putint(s.v_zfod != 0 ? (int)(s.v_ozfod * 100.0 / s.v_zfod) : 0,
  	    VMSTATROW + 4, VMSTATCOL + 1, 8 - 1);
  	PUTRATE(v_dfree, VMSTATROW + 5, VMSTATCOL + 2, 8 - 2);
  	PUTRATE(v_pfree, VMSTATROW + 6, VMSTATCOL + 2, 8 - 2);
  	PUTRATE(v_tfree, VMSTATROW + 7, VMSTATCOL, 8);
  	PUTRATE(v_reactivated, VMSTATROW + 8, VMSTATCOL, 8);
  	PUTRATE(v_pdwakeups, VMSTATROW + 9, VMSTATCOL, 8);
  	PUTRATE(v_pdpages, VMSTATROW + 10, VMSTATCOL, 8);
  	PUTRATE(v_intrans, VMSTATROW + 11, VMSTATCOL, 8);
  	putint(pgtokb(s.v_wire_count), VMSTATROW + 12, VMSTATCOL, 8);
  	putint(pgtokb(s.v_active_count), VMSTATROW + 13, VMSTATCOL, 8);
  	putint(pgtokb(s.v_inactive_count), VMSTATROW + 14, VMSTATCOL, 8);
  	putint(pgtokb(s.v_cache_count), VMSTATROW + 15, VMSTATCOL, 8);
  	putint(pgtokb(s.v_free_count), VMSTATROW + 16, VMSTATCOL, 8);
  	if (LINES - 1 > VMSTATROW + 17)
  		putint(s.bufspace / 1024, VMSTATROW + 17, VMSTATCOL, 8);
  	PUTRATE(v_vnodein, PAGEROW + 2, PAGECOL + 6, 5);
  	PUTRATE(v_vnodeout, PAGEROW + 2, PAGECOL + 12, 5);
  	PUTRATE(v_swapin, PAGEROW + 2, PAGECOL + 19, 5);
  	PUTRATE(v_swapout, PAGEROW + 2, PAGECOL + 25, 5);
  	PUTRATE(v_vnodepgsin, PAGEROW + 3, PAGECOL + 6, 5);
  	PUTRATE(v_vnodepgsout, PAGEROW + 3, PAGECOL + 12, 5);
  	PUTRATE(v_swappgsin, PAGEROW + 3, PAGECOL + 19, 5);
  	PUTRATE(v_swappgsout, PAGEROW + 3, PAGECOL + 25, 5);
  	PUTRATE(v_swtch, GENSTATROW + 1, GENSTATCOL, 4);
  	PUTRATE(v_trap, GENSTATROW + 1, GENSTATCOL + 5, 4);
  	PUTRATE(v_syscall, GENSTATROW + 1, GENSTATCOL + 10, 4);
  	PUTRATE(v_intr, GENSTATROW + 1, GENSTATCOL + 15, 4);
  	PUTRATE(v_soft, GENSTATROW + 1, GENSTATCOL + 20, 4);
  	PUTRATE(v_vm_faults, GENSTATROW + 1, GENSTATCOL + 25, 4);
  	for (i = 0, lc = 0; i < num_devices && lc < MAXDRIVES; i++)
  		if (dev_select[i].selected) {
  			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;
  			}
  		}
  	putint(s.numdirtybuffers, VNSTATROW, VNSTATCOL, 7);
  	putint(s.desiredvnodes, VNSTATROW + 1, VNSTATCOL, 7);
  	putint(s.numvnodes, VNSTATROW + 2, VNSTATCOL, 7);
  	putint(s.freevnodes, VNSTATROW + 3, VNSTATCOL, 7);
  	putint(s.nchcount, NAMEIROW + 2, NAMEICOL, 8);
  	putint((nchtotal.ncs_goodhits + nchtotal.ncs_neghits),
  	   NAMEIROW + 2, NAMEICOL + 9, 7);
  #define nz(x)	((x) ? (x) : 1)
  	putfloat((nchtotal.ncs_goodhits+nchtotal.ncs_neghits) *
  	   100.0 / nz(s.nchcount),
  	   NAMEIROW + 2, NAMEICOL + 17, 3, 0, 1);
  	putint(nchtotal.ncs_pass2, NAMEIROW + 2, NAMEICOL + 21, 7);
  	putfloat(nchtotal.ncs_pass2 * 100.0 / nz(s.nchcount),
  	   NAMEIROW + 2, NAMEICOL + 29, 3, 0, 1);
  #undef nz
  }
  
  int
  cmdkre(const char *cmd, const char *args)
  {
  	int retval;
  
  	if (prefix(cmd, "run")) {
  		retval = 1;
  		copyinfo(&s2, &s1);
  		switch (devstat_getdevs(NULL, &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 (devstat_getdevs(NULL, &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)
  {
  	int nusers = 0;
  	struct utmpx *ut;
  
  	setutxent();
  	while ((ut = getutxent()) != NULL)
  		if (ut->ut_type == USER_PROCESS)
  			nusers++;
  	endutxent();
  
  	return (nusers);
  }
  
  static float
  cputime(int indx)
  {
  	double lt;
  	int i;
  
  	lt = 0;
  	for (i = 0; i < CPUSTATES; i++)
  		lt += s.time[i];
  	if (lt == 0.0)
  		lt = 1.0;
  	return (s.time[indx] * 100.0 / lt);
  }
  
  static void
  putint(int n, int l, int lc, int w)
  {
  	int snr;
  	char b[128];
  
  	move(l, lc);
  #ifdef DEBUG
  		while (w-- > 0)
  			addch('*');
  		return;
  #endif
  	if (n == 0) {
  		while (w-- > 0)
  			addch(' ');
  		return;
  	}
  	snr = snprintf(b, sizeof(b), "%*d", w, n);
  	if (snr != w)
  		snr = snprintf(b, sizeof(b), "%*dk", w - 1, n / 1000);
  	if (snr != w)
  		snr = snprintf(b, sizeof(b), "%*dM", w - 1, n / 1000000);
  	if (snr != w) {
  		while (w-- > 0)
  			addch('*');
  		return;
  	}
  	addstr(b);
  }
  
  static void
  putfloat(double f, int l, int lc, int w, int d, int nz)
  {
  	int snr;
  	char b[128];
  
  	move(l, lc);
  #ifdef DEBUG
  		while (--w >= 0)
  			addch('*');
  		return;
  #endif
  	if (nz && f == 0.0) {
  		while (--w >= 0)
  			addch(' ');
  		return;
  	}
  	snr = snprintf(b, sizeof(b), "%*.*f", w, d, f);
  	if (snr != w)
  		snr = snprintf(b, sizeof(b), "%*.0f", w, f);
  	if (snr != w)
  		snr = snprintf(b, sizeof(b), "%*.0fk", w - 1, f / 1000);
  	if (snr != w)
  		snr = snprintf(b, sizeof(b), "%*.0fM", w - 1, f / 1000000);
  	if (snr != w) {
  		while (--w >= 0)
  			addch('*');
  		return;
  	}
  	addstr(b);
  }
  
  static void
  putlongdouble(long double f, int l, int lc, int w, int d, int nz)
  {
  	int snr;
  	char b[128];
  
  	move(l, lc);
  #ifdef DEBUG
  		while (--w >= 0)
  			addch('*');
  		return;
  #endif
  	if (nz && f == 0.0) {
  		while (--w >= 0)
  			addch(' ');
  		return;
  	}
  	snr = snprintf(b, sizeof(b), "%*.*Lf", w, d, f);
  	if (snr != w)
  		snr = snprintf(b, sizeof(b), "%*.0Lf", w, f);
  	if (snr != w)
  		snr = snprintf(b, sizeof(b), "%*.0Lfk", w - 1, f / 1000);
  	if (snr != w)
  		snr = snprintf(b, sizeof(b), "%*.0LfM", w - 1, f / 1000000);
  	if (snr != w) {
  		while (--w >= 0)
  			addch('*');
  		return;
  	}
  	addstr(b);
  }
  
  static void
  getinfo(struct Info *ls)
  {
  	struct devinfo *tmp_dinfo;
  	size_t size;
  	int mib[2];
  
  	GETSYSCTL("kern.cp_time", ls->time);
  	GETSYSCTL("kern.cp_time", cur.cp_time);
  	GETSYSCTL("vm.stats.sys.v_swtch", ls->v_swtch);
  	GETSYSCTL("vm.stats.sys.v_trap", ls->v_trap);
  	GETSYSCTL("vm.stats.sys.v_syscall", ls->v_syscall);
  	GETSYSCTL("vm.stats.sys.v_intr", ls->v_intr);
  	GETSYSCTL("vm.stats.sys.v_soft", ls->v_soft);
  	GETSYSCTL("vm.stats.vm.v_vm_faults", ls->v_vm_faults);
  	GETSYSCTL("vm.stats.vm.v_io_faults", ls->v_io_faults);
  	GETSYSCTL("vm.stats.vm.v_cow_faults", ls->v_cow_faults);
  	GETSYSCTL("vm.stats.vm.v_zfod", ls->v_zfod);
  	GETSYSCTL("vm.stats.vm.v_ozfod", ls->v_ozfod);
  	GETSYSCTL("vm.stats.vm.v_swapin", ls->v_swapin);
  	GETSYSCTL("vm.stats.vm.v_swapout", ls->v_swapout);
  	GETSYSCTL("vm.stats.vm.v_swappgsin", ls->v_swappgsin);
  	GETSYSCTL("vm.stats.vm.v_swappgsout", ls->v_swappgsout);
  	GETSYSCTL("vm.stats.vm.v_vnodein", ls->v_vnodein);
  	GETSYSCTL("vm.stats.vm.v_vnodeout", ls->v_vnodeout);
  	GETSYSCTL("vm.stats.vm.v_vnodepgsin", ls->v_vnodepgsin);
  	GETSYSCTL("vm.stats.vm.v_vnodepgsout", ls->v_vnodepgsout);
  	GETSYSCTL("vm.stats.vm.v_intrans", ls->v_intrans);
  	GETSYSCTL("vm.stats.vm.v_reactivated", ls->v_reactivated);
  	GETSYSCTL("vm.stats.vm.v_pdwakeups", ls->v_pdwakeups);
  	GETSYSCTL("vm.stats.vm.v_pdpages", ls->v_pdpages);
  	GETSYSCTL("vm.stats.vm.v_dfree", ls->v_dfree);
  	GETSYSCTL("vm.stats.vm.v_pfree", ls->v_pfree);
  	GETSYSCTL("vm.stats.vm.v_tfree", ls->v_tfree);
  	GETSYSCTL("vm.stats.vm.v_page_size", ls->v_page_size);
  	GETSYSCTL("vm.stats.vm.v_free_count", ls->v_free_count);
  	GETSYSCTL("vm.stats.vm.v_wire_count", ls->v_wire_count);
  	GETSYSCTL("vm.stats.vm.v_active_count", ls->v_active_count);
  	GETSYSCTL("vm.stats.vm.v_inactive_count", ls->v_inactive_count);
  	GETSYSCTL("vm.stats.vm.v_cache_count", ls->v_cache_count);
  	GETSYSCTL("vfs.bufspace", ls->bufspace);
  	GETSYSCTL("kern.maxvnodes", ls->desiredvnodes);
  	GETSYSCTL("vfs.numvnodes", ls->numvnodes);
  	GETSYSCTL("vfs.freevnodes", ls->freevnodes);
  	GETSYSCTL("vfs.cache.nchstats", ls->nchstats);
  	GETSYSCTL("vfs.numdirtybuffers", ls->numdirtybuffers);
  	getsysctl("hw.intrcnt", ls->intrcnt, nintr * sizeof(u_long));
  
  	size = sizeof(ls->Total);
  	mib[0] = CTL_VM;
  	mib[1] = VM_TOTAL;
  	if (sysctl(mib, 2, &ls->Total, &size, NULL, 0) < 0) {
  		error("Can't get kernel info: %s\n", strerror(errno));
  		bzero(&ls->Total, sizeof(ls->Total));
  	}
  	size = sizeof(ncpu);
  	if (sysctlbyname("hw.ncpu", &ncpu, &size, NULL, 0) < 0 ||
  	    size != sizeof(ncpu))
  		ncpu = 1;
  
  	tmp_dinfo = last.dinfo;
  	last.dinfo = cur.dinfo;
  	cur.dinfo = tmp_dinfo;
  
  	last.snap_time = cur.snap_time;
  	switch (devstat_getdevs(NULL, &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 transfers_per_second;
  	long double kb_per_transfer, mb_per_second;
  	long double elapsed_time, device_busy;
  	int di;
  
  	di = dev_select[dn].position;
  
  	if (then != NULL) {
  		/* Calculate relative to previous sample */
  		elapsed_time = now->snap_time - then->snap_time;
  	} else {
  		/* Calculate relative to device creation */
  		elapsed_time = now->snap_time - devstat_compute_etime(
  		    &now->dinfo->devices[di].creation_time, NULL);
  	}
  
  	if (devstat_compute_statistics(&now->dinfo->devices[di], then ?
  	    &then->dinfo->devices[di] : NULL, elapsed_time,
  	    DSM_KB_PER_TRANSFER, &kb_per_transfer,
  	    DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
  	    DSM_MB_PER_SECOND, &mb_per_second,
  	    DSM_BUSY_PCT, &device_busy,
  	    DSM_NONE) != 0)
  		errx(1, "%s", devstat_errbuf);
  
  	lc = DISKCOL + lc * 6;
  	putlongdouble(kb_per_transfer, DISKROW + 1, lc, 5, 2, 0);
  	putlongdouble(transfers_per_second, DISKROW + 2, lc, 5, 0, 0);
  	putlongdouble(mb_per_second, DISKROW + 3, lc, 5, 2, 0);
  	putlongdouble(device_busy, DISKROW + 4, lc, 5, 0, 0);
  }
  