mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/*
|
|
* gloadavg.c - get load average for Linux
|
|
* Copyright (C) 1993 Thomas Koenig
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. The name of the author(s) may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#ifndef __FreeBSD__
|
|
#define _POSIX_SOURCE 1
|
|
|
|
/* System Headers */
|
|
|
|
#include <stdio.h>
|
|
#else
|
|
#include <stdlib.h>
|
|
#endif
|
|
|
|
/* Local headers */
|
|
|
|
#include "gloadavg.h"
|
|
|
|
/* Global functions */
|
|
|
|
void perr(const char *fmt, ...);
|
|
|
|
double
|
|
gloadavg(void)
|
|
/* return the current load average as a floating point number, or <0 for
|
|
* error
|
|
*/
|
|
{
|
|
double result;
|
|
#ifndef __FreeBSD__
|
|
FILE *fp;
|
|
|
|
if((fp=fopen(PROC_DIR "loadavg","r")) == NULL)
|
|
result = -1.0;
|
|
else
|
|
{
|
|
if(fscanf(fp,"%lf",&result) != 1)
|
|
result = -1.0;
|
|
fclose(fp);
|
|
}
|
|
#else
|
|
if (getloadavg(&result, 1) != 1)
|
|
perr("error in getloadavg");
|
|
#endif
|
|
return result;
|
|
}
|