File: shm_limits.c

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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., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#include <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/shm_limits.h>

static const unsigned long _glibtop_sysdeps_shm_limits =
(1L << GLIBTOP_IPC_SHMMAX) + (1L << GLIBTOP_IPC_SHMMIN) +
(1L << GLIBTOP_IPC_SHMMNI) + (1L << GLIBTOP_IPC_SHMSEG);

/* Init function. */

void
_glibtop_init_shm_limits_s (glibtop *server)
{
	server->sysdeps.shm_limits = _glibtop_sysdeps_shm_limits;
}

/* Provides information about sysv ipc limits. */

void
glibtop_get_shm_limits_s (glibtop *server, glibtop_shm_limits *buf)
{
	int ret, value;

	glibtop_init_s (&server, 0, 0);

	memset (buf, 0, sizeof (glibtop_shm_limits));

	ret = table (TBL_SHMINFO, SHMINFO_MAX, (char *) &value, 1,
		     sizeof (value));

	if (ret != 1) return;

	buf->flags += (1L << GLIBTOP_IPC_SHMMAX);

	buf->shmmax = value;


	ret = table (TBL_SHMINFO, SHMINFO_MIN, (char *) &value, 1,
		     sizeof (value));

	if (ret != 1) return;

	buf->flags += (1L << GLIBTOP_IPC_SHMMIN);

	buf->shmmin = value;


	ret = table (TBL_SHMINFO, SHMINFO_MNI, (char *) &value, 1,
		     sizeof (value));

	if (ret != 1) return;

	buf->flags += (1L << GLIBTOP_IPC_SHMMNI);

	buf->shmmni = value;


	ret = table (TBL_SHMINFO, SHMINFO_SEG, (char *) &value, 1,
		     sizeof (value));

	if (ret != 1) return;

	buf->flags += (1L << GLIBTOP_IPC_SHMSEG);

	buf->shmseg = value;
}