fix persistent demo
MODIFY
experimental/persistent_demo/persistent_demo.c
experimental/persistent_demo/persistent_demo.c
int main(int argc, char** argv) {
+ ssize_t len; /* how much input did we read? */
char buf[100]; /* Example-only buffer, you'd replace it with other global or
local variables appropriate for your use case. */
@@ -57,11 +58,15 @@ int main(int argc, char** argv) {
Beware of reading from buffered FILE* objects such as stdin. Use
raw file descriptors or call fopen() / fdopen() in every pass. */
- read(0, buf, 100);
+ len = read(0, buf, 100);
/* STEP 3: This is where we'd call the tested library on the read data.
We just have some trivial inline code that faults on 'foo!'. */
+ /* do we have enough data? */
+ if (len < 4)
+ return 0;
+
if (buf[0] == 'f') {
printf("one\n");
if (buf[1] == 'o') {

fix persistent demo