freebsd-dev/usr.bin/systat/swap.c

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/*-
* Copyright (c) 1980, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS 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("$FreeBSD$");
#ifdef lint
static const char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95";
#endif
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/*
* swapinfo - based on a program of the same name by Kevin Lahey
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <kvm.h>
#include <nlist.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
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#include <string.h>
#include <err.h>
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#include "systat.h"
#include "extern.h"
kvm_t *kd;
static long blocksize;
static int hlen;
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WINDOW *
openswap()
{
return (subwin(stdscr, LINES-5-1, 0, 5, 0));
}
void
closeswap(w)
WINDOW *w;
{
if (w == NULL)
return;
wclear(w);
wrefresh(w);
delwin(w);
}
/*
* The meat of all the swap stuff is stolen from pstat(8)'s
* swapmode(), which is based on a program called swapinfo written by
* Kevin Lahey <kml@rokkaku.atl.ga.us>.
*/
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int
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initswap()
{
char msgbuf[BUFSIZ];
static int once = 0;
struct kvm_swap dummy;
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if (once)
return (1);
if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
error("%s", msgbuf);
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return (0);
}
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once = 1;
return (1);
}
static struct kvm_swap kvmsw[16];
static int kvnsw;
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void
fetchswap()
{
kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
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}
void
labelswap()
{
char *header;
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int row, i;
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fetchswap();
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row = 0;
wmove(wnd, row, 0); wclrtobot(wnd);
header = getbsize(&hlen, &blocksize);
mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
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"Disk", hlen, header, "Used",
"/0% /10% /20% /30% /40% /50% /60% /70% /80% /90% /100");
for (i = 0; i < kvnsw; ++i) {
mvwprintw(wnd, i + 1, 0, "%-5s", kvmsw[i].ksw_devname);
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}
}
void
showswap()
{
int i;
int pagesize = getpagesize();
#define CONVERT(v) ((int)((quad_t)(v) * pagesize / blocksize))
for (i = 0; i <= kvnsw; ++i) {
int lcol = 5;
int count;
if (i == kvnsw) {
if (kvnsw == 1)
break;
mvwprintw(
wnd,
i + 1,
lcol,
"%-5s",
"Total"
);
lcol += 5;
}
if (kvmsw[i].ksw_total == 0) {
mvwprintw(
wnd,
i + 1,
lcol + 5,
"(swap not configured)"
);
continue;
}
mvwprintw(
wnd,
i + 1,
lcol,
"%*d",
hlen,
CONVERT(kvmsw[i].ksw_total)
);
lcol += hlen;
mvwprintw(
wnd,
i + 1,
lcol,
"%9d ",
CONVERT(kvmsw[i].ksw_used)
);
count = (int)((double)kvmsw[i].ksw_used * 49.999 /
(double)kvmsw[i].ksw_total);
while (count >= 0) {
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waddch(wnd, 'X');
--count;
}
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}
}