system_cmds-433.tar.gz

[apple/system_cmds.git] / atrun.tproj / gloadavg.c

diff --git a/atrun.tproj/gloadavg.c b/atrun.tproj/gloadavg.c
new file mode 100644 (file)
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--- /dev/null
+++ b/atrun.tproj/gloadavg.c
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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[] =
+  "$FreeBSD: src/libexec/atrun/gloadavg.c,v 1.5 1999/08/28 00:09:12 peter 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;
+}