apéro de samedi midi en route...

.gitignore

@@ -1,5 +1,6 @@
 a.out
 *.o
 fake-values
+essai
 
 

Makefile

@@ -4,6 +4,10 @@
 
 CC = gcc
 
+essai:	essai.c funcs.o Makefile
+	gcc -Wall $< funcs.o -o $@
+
+
 funcs.o:	funcs.c funcs.h Makefile
 	gcc -Wall -c $<
 

essai.c

@@ -0,0 +1,38 @@
+/*
+ *		essai.c
+ */
+
+#include  <stdio.h>
+#include  <unistd.h>
+#include  <stdlib.h>
+
+#include  "funcs.h"
+
+int verbosity;
+
+/* --------------------------------------------------------------- */
+
+int main(int argc, char *argv[])
+{
+int		opt, foo;
+int		type = 0;
+double		loads[3];
+
+while ((opt = getopt(argc, argv, "vst:")) != -1) {
+	switch (opt) {
+		case 'v':	verbosity++;		break;
+		case 's':	srand(getpid());	break;
+		case 't':	type = atoi(optarg);	break;	
+		default:				break;
+		}
+	}
+
+foo = get_loadavg(loads);
+if (foo) fprintf(stderr, "get loadavg -> %d\n", foo);
+
+printf("%f %f %f %f\n", dtime(), loads[0], loads[1], loads[2]);
+
+return 0;
+}
+
+/* --------------------------------------------------------------- */

fake-values.c

@@ -30,7 +30,6 @@ if (verbosity > 1) {
 	fprintf(stderr, "fake values - %s %s\n", __DATE__, __TIME__);
 	}
 
-
 printf("%f %d\n", dtime(), random1000(type));
 
 return 0;

funcs.c

@@ -48,18 +48,25 @@ return (double)tv.tv_sec + (double)tv.tv_usec / 1e6;
 
 /* --------------------------------------------------------------- */
 
-double get_loadavg(int foo)
+int get_loadavg(double *where)
 {
 FILE		*fp;
+double		loads[3];
+int		foo;
 
 if ( ! (fp=fopen("/proc/loadavg", "r")) ) {
 	perror("read loadavg");
-	return -42.51;
+	return -1;
 	}
 
+foo = fscanf(fp, "%lf %lf %lf", loads, loads+1, loads+2);
+if (3 != foo) fprintf(stderr, "%s : read %d vals\n", __func__, foo);
+
+memcpy(where, loads, 3 * sizeof(double));
+
 fclose(fp);
 
-return -42.51;	
+return 0;	
 }
 
 /* --------------------------------------------------------------- */

funcs.h

@@ -4,4 +4,5 @@
 
 int random1000(int mode);
 double dtime(void);
+int get_loadavg(double *where);