NetBSD/usr.bin/systat/swap.c

172 lines
4.2 KiB
C

/* $NetBSD: swap.c,v 1.19 2006/03/18 11:02:48 dsl Exp $ */
/*-
* Copyright (c) 1997 Matthew R. Green. All rights reserved.
* 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. 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>
#ifndef lint
#if 0
static char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95";
#endif
__RCSID("$NetBSD: swap.c,v 1.19 2006/03/18 11:02:48 dsl Exp $");
#endif /* not lint */
#include <sys/param.h>
#include <sys/swap.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "systat.h"
#include "extern.h"
void showspace(char *header, int hlen, long blocksize);
static long blocksize;
static int hlen, nswap, rnswap;
static int first = 1;
static struct swapent *swap_devices;
WINDOW *
openswap(void)
{
return (subwin(stdscr, -1, 0, 5, 0));
}
void
closeswap(WINDOW *w)
{
if (w == NULL)
return;
wclear(w);
wrefresh(w);
delwin(w);
}
/* do nothing */
int
initswap(void)
{
return (1);
}
void
fetchswap(void)
{
int update_label = 0;
first = 0;
nswap = swapctl(SWAP_NSWAP, 0, 0);
if (nswap < 0)
error("error: %s", strerror(errno));
if (nswap == 0)
return;
update_label = (nswap != rnswap);
if (swap_devices)
(void)free(swap_devices);
if ((swap_devices = malloc(nswap * sizeof(*swap_devices))) == NULL) {
error("malloc failed");
die(0);
}
if ((rnswap = swapctl(SWAP_STATS, (void *)swap_devices, nswap)) != nswap) {
error("swapctl failed");
die(0);
}
if (update_label)
labelswap();
}
void
labelswap(void)
{
char *header;
int row;
row = 0;
wmove(wnd, row, 0);
wclrtobot(wnd);
if (first)
fetchswap();
if (nswap == 0) {
mvwprintw(wnd, row++, 0, "No swap");
return;
}
header = getbsize(&hlen, &blocksize);
mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
"Disk", hlen, header, "Used",
"/0% /10% /20% /30% /40% /50% /60% /70% /80% /90% /100%");
}
void
showswap(void)
{
int col, blk_div, i, avail, used, xsize, swp_free;
struct swapent *sep;
char *p;
blk_div = blocksize / 512;
swp_free = avail = 0;
for (sep = swap_devices, i = 0; i < nswap; i++, sep++) {
p = strrchr(sep->se_path, '/');
p = p ? p+1 : sep->se_path;
mvwprintw(wnd, i + 1, 0, "%-5s", p);
col = 5;
mvwprintw(wnd, i + 1, col, "%*d", hlen, sep->se_nblks / blk_div);
col += hlen;
xsize = sep->se_nblks;
used = sep->se_inuse;
avail += xsize;
swp_free += xsize - used;
mvwprintw(wnd, i + 1, col, "%9d ", used / blk_div);
wclrtoeol(wnd);
whline(wnd, 'X', (100 * used / xsize + 1) / 2);
}
/* do total if necessary */
if (nswap > 1) {
used = avail - swp_free;
mvwprintw(wnd, i + 1, 0, "%-5s%*d%9d ",
"Total", hlen, avail / blk_div, used / blk_div);
wclrtoeol(wnd);
whline(wnd, 'X', (100 * used / avail + 1) / 2);
}
}