freebsd-src/usr.bin/systat/swap.c
Joel Dahl da52b4caaf Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with:	imp, rwatson
2010-12-11 08:32:16 +00:00

219 lines
4.6 KiB
C

/*-
* 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.
* 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
/*
* 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>
#include <string.h>
#include <err.h>
#include "systat.h"
#include "extern.h"
kvm_t *kd;
static char *header;
static long blocksize;
static int dlen, odlen;
static int hlen;
static int ulen, oulen;
static int pagesize;
WINDOW *
openswap(void)
{
return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
}
void
closeswap(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>.
*/
#define NSWAP 16
static struct kvm_swap kvmsw[NSWAP];
static int kvnsw, okvnsw;
static void calclens(void);
#define CONVERT(v) ((int)((int64_t)(v) * pagesize / blocksize))
static void
calclens(void)
{
int i, n;
int len;
dlen = sizeof("Disk");
for (i = 0; i < kvnsw; ++i) {
len = strlen(kvmsw[i].ksw_devname);
if (dlen < len)
dlen = len;
}
ulen = sizeof("Used");
for (n = CONVERT(kvmsw[kvnsw].ksw_used), len = 2; n /= 10; ++len);
if (ulen < len)
ulen = len;
}
int
initswap(void)
{
static int once = 0;
if (once)
return (1);
header = getbsize(&hlen, &blocksize);
pagesize = getpagesize();
if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
error("systat: kvm_getswapinfo failed");
return (0);
}
okvnsw = kvnsw;
calclens();
odlen = dlen;
oulen = ulen;
once = 1;
return (1);
}
void
fetchswap(void)
{
okvnsw = kvnsw;
if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
error("systat: kvm_getswapinfo failed");
return;
}
odlen = dlen;
oulen = ulen;
calclens();
}
void
labelswap(void)
{
const char *name;
int i;
fetchswap();
werase(wnd);
mvwprintw(wnd, 0, 0, "%*s%*s%*s %s",
-dlen, "Disk", hlen, header, ulen, "Used",
"/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
for (i = 0; i <= kvnsw; ++i) {
if (i == kvnsw) {
if (kvnsw == 1)
break;
name = "Total";
} else
name = kvmsw[i].ksw_devname;
mvwprintw(wnd, i + 1, 0, "%*s", -dlen, name);
}
}
void
showswap(void)
{
int count;
int i;
if (kvnsw != okvnsw || dlen != odlen || ulen != oulen)
labelswap();
for (i = 0; i <= kvnsw; ++i) {
if (i == kvnsw) {
if (kvnsw == 1)
break;
}
if (kvmsw[i].ksw_total == 0) {
mvwprintw(
wnd,
i + 1,
dlen + hlen + ulen + 1,
"(swap not configured)"
);
continue;
}
wmove(wnd, i + 1, dlen);
wprintw(wnd, "%*d", hlen, CONVERT(kvmsw[i].ksw_total));
wprintw(wnd, "%*d", ulen, CONVERT(kvmsw[i].ksw_used));
count = 50.0 * kvmsw[i].ksw_used / kvmsw[i].ksw_total + 1;
waddch(wnd, ' ');
while (count--)
waddch(wnd, 'X');
wclrtoeol(wnd);
}
}