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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 <sys/vminfo.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/swap.h>
static const unsigned long _glibtop_sysdeps_swap =
(1 << GLIBTOP_SWAP_TOTAL) + (1 << GLIBTOP_SWAP_USED) +
(1 << GLIBTOP_SWAP_FREE) + (1 << GLIBTOP_SWAP_PAGEIN) +
(1 << GLIBTOP_SWAP_PAGEOUT);
#define FILENAME "/etc/swapspaces"
/* 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)
{
struct vminfo vminfo;
struct pginfo pginfo;
int pagesize;
int result;
FILE* fd;
char device_name[128];
int c;
int comment = 0;
int pos = 0;
glibtop_init_s (&server, (1L << GLIBTOP_SYSDEPS_SWAP), 0);
memset (buf, 0, sizeof (glibtop_swap));
pagesize = sysconf(_SC_PAGESIZE);
fd = fopen(FILENAME, "r");
if (fd == NULL)
{
glibtop_error_io_r (server, "open (%s)", FILENAME);
}
buf->total = 0;
buf->free = 0;
while((c = getc(fd)) != EOF)
{
if (comment)
{
/* skip comments */
if (c == '\n') comment = 0;
continue;
}
switch(c)
{
case '*':
comment = 1;
break;
case '\n':
device_name[pos] = 0;
pos = 0;
if (strncmp("dev=", device_name, 4) == 0)
{
result = swapqry(device_name+4, &pginfo);
if (result == -1)
{
glibtop_error_io_r (server, "Cannot read pginfo");
break;
}
buf->total += pginfo.size * pagesize;
buf->free += pginfo.free * pagesize;;
}
break;
case ' ':
case '\t':
break;
default:
device_name[pos++] = c;
break;
}
}
buf->used = buf->total - buf->free;
fclose(fd);
#ifdef HAVE_VMGETINFO
result = vmgetinfo((void*)&vminfo, VMINFO, sizeof(vminfo));
#else
result = _glibtop_vmgetinfo((void*)&vminfo, VMINFO, sizeof(vminfo));
#endif
if (result == -1)
{
glibtop_error_io_r (server, "Cannot read vminfo");
return;
}
buf->pagein = vminfo.pageins;
buf->pageout = vminfo.pageouts;
buf->flags = _glibtop_sysdeps_swap;
}
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