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/* $Id$ */
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, August 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 <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/shm_limits.h>
#include <glibtop_suid.h>
#if defined(__bsdi__) && (_BSDI_VERSION < 199700)
/* Older versions of BSDI don't seem to have this. */
int
glibtop_init_shm_limits_p (glibtop *server)
{
return 0;
}
int
glibtop_get_shm_limits_p (glibtop *server, glibtop_shm_limits *buf)
{
glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_SHM_LIMITS), 0);
memset (buf, 0, sizeof (glibtop_shm_limits));
return 0;
}
#else
/* #define KERNEL to get declaration of `struct shminfo'. */
#if defined(__FreeBSD__) || defined(__bsdi__)
#define KERNEL 1
#else
#define _KERNEL 1
#endif
#include <sys/ipc.h>
#include <sys/shm.h>
static unsigned long _glibtop_sysdeps_shm_limits =
(1L << GLIBTOP_IPC_SHMMAX) + (1L << GLIBTOP_IPC_SHMMIN) +
(1L << GLIBTOP_IPC_SHMMNI) + (1L << GLIBTOP_IPC_SHMSEG) +
(1L << GLIBTOP_IPC_SHMALL);
/* The values in this structure never change at runtime, so we only
* read it once during initialization. We have to use the name `_shminfo'
* since `shminfo' is already declared external in <sys/shm.h>. */
static struct shminfo _shminfo;
/* nlist structure for kernel access */
static struct nlist nlst [] = {
{ "_shminfo" },
{ 0 }
};
/* Init function. */
int
glibtop_init_shm_limits_p (glibtop *server)
{
if (kvm_nlist (server->machine.kd, nlst) != 0) {
glibtop_warn_io_r (server, "kvm_nlist (shm_limits)");
return -1;
}
if (kvm_read (server->machine.kd, nlst [0].n_value,
&_shminfo, sizeof (_shminfo)) != sizeof (_shminfo)) {
glibtop_warn_io_r (server, "kvm_read (shminfo)");
return -1;
}
server->sysdeps.shm_limits = _glibtop_sysdeps_shm_limits;
return 0;
}
/* Provides information about sysv ipc limits. */
int
glibtop_get_shm_limits_p (glibtop *server, glibtop_shm_limits *buf)
{
glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_SHM_LIMITS), 0);
memset (buf, 0, sizeof (glibtop_shm_limits));
if (server->sysdeps.shm_limits == 0)
return -1;
buf->shmmax = _shminfo.shmmax;
buf->shmmin = _shminfo.shmmin;
buf->shmmni = _shminfo.shmmni;
buf->shmseg = _shminfo.shmseg;
buf->shmall = _shminfo.shmall;
buf->flags = _glibtop_sysdeps_shm_limits;
return 0;
}
#endif /* either a newer BSDI or no BSDI at all. */
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