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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/msg_limits.h>
#include <glibtop_suid.h>
/* Define the appropriate macro (if any) to get declaration of `struct
* msginfo'. Needed on, at least, FreeBSD. */
#if defined (STRUCT_MSGINFO_NEEDS_KERNEL)
#define KERNEL 1
#elif defined (STRUCT_MSGINFO_NEEDS__KERNEL)
#define _KERNEL 1
#endif
#include <sys/ipc.h>
#include <sys/msg.h>
static const unsigned long _glibtop_sysdeps_msg_limits =
(1L << GLIBTOP_IPC_MSGMAX) + (1L << GLIBTOP_IPC_MSGMNI) +
(1L << GLIBTOP_IPC_MSGMNB) + (1L << GLIBTOP_IPC_MSGTQL) +
(1L << GLIBTOP_IPC_MSGSSZ);
/* The values in this structure never change at runtime, so we only
* read it once during initialization. We have to use the name `_msginfo'
* since `msginfo' is already declared external in <sys/msg.h>. */
static struct msginfo _msginfo;
/* Init function. */
void
_glibtop_init_msg_limits_p (glibtop *server)
{
int mib[3];
struct msg_sysctl_info *msgsi;
size_t len = sizeof(struct msginfo);
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVIPC_INFO;
mib[2] = KERN_SYSVIPC_MSG_INFO;
if ((msgsi = malloc(len)) == NULL) {
glibtop_warn_io_r (server, "malloc (shm_limits)");
return;
}
if (sysctl(mib, 3, msgsi, &len, NULL, 0) < 0) {
glibtop_warn_io_r (server, "sysctl (shm_limits)");
return;
}
_msginfo = msgsi->msginfo;
free (msgsi);
server->sysdeps.msg_limits = _glibtop_sysdeps_msg_limits;
}
/* Provides information about sysv ipc limits. */
void
glibtop_get_msg_limits_p (glibtop *server, glibtop_msg_limits *buf)
{
glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_MSG_LIMITS), 0);
memset (buf, 0, sizeof (glibtop_msg_limits));
if (server->sysdeps.msg_limits == 0)
return;
buf->msgmax = _msginfo.msgmax;
buf->msgmni = _msginfo.msgmni;
buf->msgmnb = _msginfo.msgmnb;
buf->msgtql = _msginfo.msgtql;
buf->msgssz = _msginfo.msgtql;
buf->flags = _glibtop_sysdeps_msg_limits;
}
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