utils/examples: avoid busy waiting on wait for reconnect

Signed-off-by: Peter Lieven <pl@kamp.de>

examples/iscsi-dd.c

@@ -22,6 +22,7 @@
 #include <string.h>
 #include <poll.h>
 #include <getopt.h>
+#include <unistd.h>
 #include "iscsi.h"
 #include "scsi-lowlevel.h"
 
@@ -377,6 +378,11 @@ int main(int argc, char *argv[])
 		pfd[1].fd = iscsi_get_fd(client.dst_iscsi);
 		pfd[1].events = iscsi_which_events(client.dst_iscsi);
 
+		if (!pfd[0].events && !pfd[1].events) {
+			sleep(1);
+			continue;
+		}
+
 		if (poll(&pfd[0], 2, -1) < 0) {
 			printf("Poll failed");
 			exit(10);

examples/iscsiclient.c

@@ -47,6 +47,7 @@ WSADATA wsaData;
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
+#include <unistd.h>
 #include "iscsi.h"
 #include "scsi-lowlevel.h"