projects / apple / system_cmds.git / blame
| Commit | Line | Data |
|---|---|---|
| 916eb79e A |
1 | /* |
| 2 | * gloadavg.c - get load average for Linux | |
| 3 | * Copyright (C) 1993 Thomas Koenig | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. The name of the author(s) may not be used to endorse or promote | |
| 11 | * products derived from this software without specific prior written | |
| 12 | * permission. | |
| 13 | * | |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR | |
| 15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
| 16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 17 | * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 21 | * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 | */ | |
| 25 | ||
| 26 | #ifndef lint | |
| 27 | static const char rcsid[] = | |
| 28 | "$FreeBSD: src/libexec/atrun/gloadavg.c,v 1.5 1999/08/28 00:09:12 peter Exp $"; | |
| 29 | #endif /* not lint */ | |
| 30 | ||
| 31 | #ifndef __FreeBSD__ | |
| 32 | #define _POSIX_SOURCE 1 | |
| 33 | ||
| 34 | /* System Headers */ | |
| 35 | ||
| 36 | #include <stdio.h> | |
| 37 | #else | |
| 38 | #include <stdlib.h> | |
| 39 | #endif | |
| 40 | ||
| 41 | /* Local headers */ | |
| 42 | ||
| 43 | #include "gloadavg.h" | |
| 44 | ||
| 45 | /* Global functions */ | |
| 46 | ||
| 47 | void perr(const char *a); | |
| 48 | ||
| 49 | double | |
| 50 | gloadavg(void) | |
| 51 | /* return the current load average as a floating point number, or <0 for | |
| 52 | * error | |
| 53 | */ | |
| 54 | { | |
| 55 | double result; | |
| 56 | #ifndef __FreeBSD__ | |
| 57 | FILE *fp; | |
| 58 | ||
| 59 | if((fp=fopen(PROC_DIR "loadavg","r")) == NULL) | |
| 60 | result = -1.0; | |
| 61 | else | |
| 62 | { | |
| 63 | if(fscanf(fp,"%lf",&result) != 1) | |
| 64 | result = -1.0; | |
| 65 | fclose(fp); | |
| 66 | } | |
| 67 | #else | |
| 68 | if (getloadavg(&result, 1) != 1) | |
| 69 | perr("error in getloadavg"); | |
| 70 | #endif | |
| 71 | return result; | |
| 72 | } |