82fdca61c2
1998-10-31 Martin Baulig <martin@home-of-linux.org> * *.c: Use glibtop_warn_io_r () instead of glibtop_error_io_r (). * proctime.c, prockernel.c, procargs.c: Don't call kvm_uread () if the /proc filesystem is not mounted.
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/* $Id$ */
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/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the Gnome Top Library.
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Contributed by Martin Baulig <martin@home-of-linux.org>, August 1998.
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The Gnome Top Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Top Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/shm_limits.h>
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#include <glibtop_suid.h>
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/* #define KERNEL to get declaration of `struct shminfo'. */
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#define KERNEL
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#include <sys/ipc.h>
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#include <sys/shm.h>
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static unsigned long _glibtop_sysdeps_shm_limits =
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(1 << GLIBTOP_IPC_SHMMAX) + (1 << GLIBTOP_IPC_SHMMIN) +
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(1 << GLIBTOP_IPC_SHMMNI) + (1 << GLIBTOP_IPC_SHMSEG) +
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(1 << GLIBTOP_IPC_SHMALL);
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/* The values in this structure never change at runtime, so we only
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* read it once during initialization. We have to use the name `_shminfo'
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* since `shminfo' is already declared external in <sys/shm.h>. */
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static struct shminfo _shminfo;
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/* nlist structure for kernel access */
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static struct nlist nlst [] = {
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{ "_shminfo" },
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{ 0 }
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};
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/* Init function. */
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void
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glibtop_init_shm_limits_p (glibtop *server)
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{
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if (kvm_nlist (server->machine.kd, nlst) != 0) {
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glibtop_warn_io_r (server, "kvm_nlist (shm_limits)");
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return;
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}
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if (kvm_read (server->machine.kd, nlst [0].n_value,
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&_shminfo, sizeof (_shminfo)) != sizeof (_shminfo)) {
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glibtop_warn_io_r (server, "kvm_read (shminfo)");
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return;
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}
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server->sysdeps.shm_limits = _glibtop_sysdeps_shm_limits;
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}
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/* Provides information about sysv ipc limits. */
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void
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glibtop_get_shm_limits_p (glibtop *server, glibtop_shm_limits *buf)
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{
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glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_SHM_LIMITS), 0);
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memset (buf, 0, sizeof (glibtop_shm_limits));
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if (server->sysdeps.shm_limits == 0)
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return;
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buf->shmmax = _shminfo.shmmax;
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buf->shmmin = _shminfo.shmmin;
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buf->shmmni = _shminfo.shmmni;
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buf->shmseg = _shminfo.shmseg;
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buf->shmall = _shminfo.shmall;
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buf->flags = _glibtop_sysdeps_shm_limits;
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}
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