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- /*
- * 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[] =
- "$Id: gloadavg.c,v 1.4 1997/11/20 07:21:55 charnier Exp $";
- #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 *a);
-
- 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;
- }
-