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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>, 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/sem_limits.h>
#include <glibtop_suid.h>
/* #define _KERNEL to get declaration of `struct seminfo'. */
#define _KERNEL 1
#include <sys/ipc.h>
#include <sys/sem.h>
static unsigned long _glibtop_sysdeps_sem_limits =
(1L << GLIBTOP_IPC_SEMMNI) +
(1L << GLIBTOP_IPC_SEMMNS) + (1L << GLIBTOP_IPC_SEMMNU) +
(1L << GLIBTOP_IPC_SEMMSL) + (1L << GLIBTOP_IPC_SEMOPM) +
(1L << GLIBTOP_IPC_SEMUME) + (1L << GLIBTOP_IPC_SEMUSZ) +
(1L << GLIBTOP_IPC_SEMVMX) + (1L << GLIBTOP_IPC_SEMAEM);
/* The values in this structure never change at runtime, so we only
* read it once during initialization. We have to use the name `_seminfo'
* since `seminfo' is already declared external in <sys/sem.h>. */
static struct seminfo _seminfo;
/* nlist structure for kernel access */
static struct nlist nlst [] = {
{ "_seminfo" },
{ 0 }
};
/* Init function. */
void
_glibtop_init_sem_limits_p (glibtop *server)
{
if (kvm_nlist (server->machine->kd, nlst) < 0) {
glibtop_warn_io_r (server, "kvm_nlist (sem_limits)");
return;
}
if (kvm_read (server->machine->kd, nlst [0].n_value,
&_seminfo, sizeof (_seminfo)) != sizeof (_seminfo)) {
glibtop_warn_io_r (server, "kvm_read (seminfo)");
return;
}
server->sysdeps.sem_limits = _glibtop_sysdeps_sem_limits;
}
/* Provides information about sysv sem limits. */
void
glibtop_get_sem_limits_p (glibtop *server, glibtop_sem_limits *buf)
{
glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_SEM_LIMITS), 0);
memset (buf, 0, sizeof (glibtop_sem_limits));
if (server->sysdeps.sem_limits == 0)
return;
buf->semmni = _seminfo.semmni;
buf->semmns = _seminfo.semmns;
buf->semmnu = _seminfo.semmnu;
buf->semmsl = _seminfo.semmsl;
buf->semopm = _seminfo.semopm;
buf->semvmx = _seminfo.semvmx;
buf->semaem = _seminfo.semaem;
buf->flags = _glibtop_sysdeps_sem_limits;
}
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