From: Mårten Dolk <dolk@dtek.chalmers.se>
Date: Thu, 19 May 2005 13:30:24 +0000 (+0000)
Subject: intital ci of simprog.c
X-Git-Url: https://ruin.nu/git/?p=popboot.git;a=commitdiff_plain;h=52feef3369ad80d5b7207620f37ae341ccd11b95

intital ci of simprog.c
---

diff --git a/simprog.c b/simprog.c
new file mode 100644
index 0000000..a713847
--- /dev/null
+++ b/simprog.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+void print_help(char name[])
+{
+    printf("\n");
+    printf("Simulates execution of an program. \n");
+    printf("\n");
+    printf("Usage: %s \n", name);
+    printf("The default action of the program is to return with 0 (success) \n");
+    printf(" -eNN=MM     Return with value NN with a probability of MM% \n");
+    printf("\n");
+}
+
+
+void parse_argv(char argv[], int *retval, int *percentage)
+{
+    if ( sscanf(argv,"-e %d = %d",retval,percentage)!=2 )
+    {
+	printf("Argument sytax error : %s \n", argv);
+	exit(EXIT_FAILURE);
+    }
+
+    if ( *percentage <= 0 )
+    {
+	printf("Percentage argument must be > 0");
+	exit(EXIT_FAILURE);
+    }
+}
+
+
+
+int main (int argc, char** argv)
+{
+    int i, rand_value, sum;
+    int retvals[100];
+    int percentages[100];
+	
+    if (argc==2 && strcmp("--help",argv[1])==0 )
+    {
+	print_help(argv[0]);
+	return 1;
+    }	
+
+
+    for (i=1; i<argc; i++)
+    {
+	parse_argv(argv[i], retvals+i-1, percentages+i-1);
+    }
+
+        
+    /* Get random number in interval [0,100) */
+    srand(time(0));
+    rand_value = rand() % 100;
+    
+    /* See if we want to fire an "error" */
+    sum = 0;
+    for (i=0; i<argc-1; i++)
+    {
+	sum += percentages[i];
+	if ( rand_value < sum )
+	{
+		printf("Simulated error : %d \n", retvals[i]);
+		return retvals[i];
+	}
+    }
+
+    /* No "error" */
+    return 0;
+}