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/* Copyright (c) 1993
* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
* Copyright (c) 1987 Oliver Laumann
*
* This program 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, or (at your option)
* any later version.
*
* This program 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 this program (see the file COPYING); if not, write to the
* Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
****************************************************************
*/
#include "rcs.h"
RCS_ID("$Id$ FAU")
#include <sys/types.h>
#include <fcntl.h>
#ifdef ultrix
# include <sys/fixpoint.h>
#endif /* ultrix */
#include "config.h"
#include "screen.h"
#include "extern.h"
#ifdef LOADAV
static int GetLoadav __P((void));
static LOADAV_TYPE loadav[LOADAV_NUM];
static int loadok;
/***************************************************************/
#if defined(linux) && !defined(LOADAV_DONE)
#define LOADAV_DONE
/*
* This is the easy way. It relies in /proc being mounted.
* For the big and ugly way refer to previous screen version.
*/
void
InitLoadav()
{
loadok = 1;
}
static int
GetLoadav()
{
FILE *fp;
double d[3];
int i;
if ((fp = secfopen("/proc/loadavg", "r")) == NULL)
return 0;
fscanf(fp, "%lf %lf %lf\n", d, d + 1, d + 2);
fclose(fp);
for (i = 0; i < (LOADAV_NUM > 3 ? 3 : LOADAV_NUM); i++)
loadav[i] = d[i];
return i;
}
#endif /* linux */
/***************************************************************/
#if defined(LOADAV_GETLOADAVG) && !defined(LOADAV_DONE)
#define LOADAV_DONE
void
InitLoadav()
{
loadok = 1;
}
static int
GetLoadav()
{
return getloadavg(loadav, LOADAV_NUM);
}
#endif
/***************************************************************/
#if defined(apollo) && !defined(LOADAV_DONE)
#define LOADAV_DONE
void
InitLoadav()
{
loadok = 1;
}
static int
GetLoadav()
{
proc1_$get_loadav(loadav);
return LOADAV_NUM;
}
#endif
/***************************************************************/
#if defined(NeXT) && !defined(LOADAV_DONE)
#define LOADAV_DONE
#include <mach/mach.h>
static processor_set_t default_set;
void
InitLoadav()
{
kern_return_t error;
error = processor_set_default(host_self(), &default_set);
if (error != KERN_SUCCESS)
mach_error("Error calling processor_set_default", error);
else
loadok = 1;
}
static int
GetLoadav()
{
unsigned int info_count;
struct processor_set_basic_info info;
host_t host;
info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, &host, (processor_set_info_t)&info, &info_count) != KERN_SUCCESS)
return 0;
loadav[0] = (float)info.load_average / LOAD_SCALE;
return 1;
}
#endif
/***************************************************************/
#if !defined(LOADAV_DONE)
/*
* The old fashion way: open kernel and read avenrun
*
* Header File includes
*/
# ifdef NLIST_STRUCT
# include <nlist.h>
# else
# include <a.out.h>
# endif
# ifndef NLIST_DECLARED
extern int nlist __P((char *, struct nlist *));
# endif
#ifdef __sgi
# if _MIPS_SZLONG == 64
# define nlist nlist64
# endif
#endif
static struct nlist nl[2];
static int kmemf;
void
InitLoadav()
{
debug("Init Kmem...\n");
if ((kmemf = open("/dev/kmem", O_RDONLY)) == -1)
return;
# if !defined(_AUX_SOURCE) && !defined(AUX)
# ifdef NLIST_NAME_UNION
nl[0].n_un.n_name = LOADAV_AVENRUN;
# else
nl[0].n_name = LOADAV_AVENRUN;
# endif
# else
strncpy(nl[0].n_name, LOADAV_AVENRUN, sizeof(nl[0].n_name));
# endif
debug2("Searching in %s for %s\n", LOADAV_UNIX, nl[0].n_name);
nlist(LOADAV_UNIX, nl);
# ifndef _IBMR2
if (nl[0].n_value == 0)
# else
if (nl[0].n_value == 0 || lseek(kmemf, (off_t) nl[0].n_value, 0) == (off_t)-1 || read(kmemf, (char *)&nl[0].n_value, sizeof(nl[0].n_value)) != sizeof(nl[0].n_value))
# endif
{
close(kmemf);
return;
}
# ifdef sgi
nl[0].n_value &= (unsigned long)-1 >> 1; /* clear upper bit */
# endif /* sgi */
debug1("AvenrunSym found (0x%lx)!!\n", nl[0].n_value);
loadok = 1;
}
static int
GetLoadav()
{
if (lseek(kmemf, (off_t) nl[0].n_value, 0) == (off_t)-1)
return 0;
if (read(kmemf, (char *) loadav, sizeof(loadav)) != sizeof(loadav))
return 0;
return LOADAV_NUM;
}
#endif
/***************************************************************/
#ifndef FIX_TO_DBL
#define FIX_TO_DBL(l) ((double)(l) / LOADAV_SCALE)
#endif
void
AddLoadav(p)
char *p;
{
int i, j;
if (loadok == 0)
return;
j = GetLoadav();
for (i = 0; i < j; i++)
{
sprintf(p, " %2.2f", FIX_TO_DBL(loadav[i]));
p += strlen(p);
}
}
#endif /* LOADAV */
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