Tests: Fix: `wait_on_file()` returns too early

Issue
=====
With the current implementation, when calling the `wait_on_file()`
function with the `file_exist` parameter set to false the function will
return even if the target file exists.

In a scenario where we enter the loop and the targer file exist, the
first call to `stat()` will return 0 and will not enter any of the `if`
and break from the loop directly.

Solution
========
If the file exists, only break from the loop if it's the desired exit
condition.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Change-Id: Ia3e9c41a2a515815d3ff931d8f7c1c14a52b31ae
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/tests/regression/tools/notification/notification.c b/tests/regression/tools/notification/notification.c
index 19df9bc3049f47681b4c8f494d56e5da9bdcf0f0..f076bbd0e5f5373740061b13f47ef4efdfcd2ad9 100644 (file)
--- a/tests/regression/tools/notification/notification.c
+++ b/tests/regression/tools/notification/notification.c
@@ -59,16 +59,31 @@ void wait_on_file(const char *path, bool file_exist)
                ret = stat(path, &buf);
                if (ret == -1 && errno == ENOENT) {
                        if (file_exist) {
                ret = stat(path, &buf);
                if (ret == -1 && errno == ENOENT) {
                        if (file_exist) {

-                               (void) poll(NULL, 0, 10);       /* 10 ms delay */
-                               continue;                       /* retry */
+                               /*
+                                * The file does not exist. wait a bit and
+                                * continue looping until it does.
+                                */
+                               (void) poll(NULL, 0, 10);
+                               continue;

                        }
                        }

-                       break; /* File does not exist */
+
+                       /*
+                        * File does not exist and the exit condition we want.
+                        * Break from the loop and return.
+                        */
+                       break;

                }
                if (ret) {
                        perror("stat");
                        exit(EXIT_FAILURE);
                }
                }
                if (ret) {
                        perror("stat");
                        exit(EXIT_FAILURE);
                }

-               break;  /* found */
+               /*
+                * stat() returned 0, so the file exists. break now only if
+                * that's the exit condition we want.
+                */
+               if (file_exist) {
+                       break;
+               }

        }
 }
 
        }
 }