new file mode 100644

@@ -0,0 +1,40 @@

+

+#include <stdio.h>

+#include <stdlib.h>

+#include <time.h>

+#include <inttypes.h>

+

+int main(int argc, char** argv)

+{

+    FILE *f= fopen(argv[1], "rb+");

+    int count= atoi(argv[2]);

+    int maxburst= atoi(argv[3]);

+    int length, i;

+

+    srand (time (0));

+

+    fseek(f, 0, SEEK_END);

+    length= ftell(f);

+    fseek(f, 0, SEEK_SET);

+

+    while(count--){

+        int burst= 1 + random() * (uint64_t) (abs(maxburst)-1) / RAND_MAX;

+        int pos= random() * (uint64_t) length / RAND_MAX;

+        fseek(f, pos, SEEK_SET);

+

+        if(maxburst<0) burst= -maxburst;

+

+        if(pos + burst > length)

+            continue;

+

+        while(burst--){

+            int val= random() * 256ULL / RAND_MAX;

+

+            if(maxburst<0) val=0;

+

+            fwrite(&val, 1, 1, f);

+        }

+    }

+

+    return 0;

+}