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/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
LibGTop is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/swap.h>
#include <unistd.h>
#include <sys/swap.h>
#include <glibtop_private.h>
static const unsigned long _glibtop_sysdeps_swap =
(1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) +
(1L << GLIBTOP_SWAP_FREE);
/* Init function. */
void
_glibtop_init_swap_s (glibtop *server)
{
server->sysdeps.swap = _glibtop_sysdeps_swap;
}
/* Provides information about swap usage. */
void
glibtop_get_swap_s (glibtop *server, glibtop_swap *buf)
{
swaptbl_t *s = NULL;
int i, n1, n2;
/* we don't care about ste_path, and we're lazy */
char shared_path[BUFSIZ]; /* hope this is large enough */
const int pagesize = getpagesize();
memset(buf, 0, sizeof *buf);
switch( (n1 = swapctl(SC_GETNSWP, NULL)) )
{
case -1:
glibtop_warn_r(server, "swapctl: GETNSWP");
return;
case 0:
/* no swapfile */
goto out_no_swap;
default:
break;
}
/* RTFM */
s = g_malloc(sizeof(swaptbl_t)
+ n1 * sizeof(swapent_t));
s->swt_n = n1;
/* initialize string pointers */
for (i = 0; i < n1; i++)
{
s->swt_ent[i].ste_path = shared_path;
}
if ((n2 = swapctl(SC_LIST, s)) < 0)
{
glibtop_warn_r(server, "swapctl: SC_LIST");
goto out_free;
}
/* #swapfile may have changed between the 2 swapctl() calls
* we don't care, we just use the smallest #swapfile */
for (i = 0; i < MIN(n1, n2); i++)
{
buf->total += s->swt_ent[i].ste_pages;
buf->free += s->swt_ent[i].ste_free;
}
buf->total *= pagesize;
buf->free *= pagesize;
buf->used = buf->total - buf->free;
out_no_swap:
buf->flags = _glibtop_sysdeps_swap;
out_free:
g_free(s);
}
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