[PATCH v4 7/7] tests/qtest: Delete previous boot file

[Akihiko Odaki <akihiko.odaki@daynix.com>]

A test run may create boot files several times. Delete the previous boot
file before creating a new one.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Thomas Huth <thuth@redhat.com>
---
 tests/qtest/migration-test.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 70b606b88864..6c06100d91e2 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -144,12 +144,23 @@ static char *bootpath;
 #include "tests/migration/ppc64/a-b-kernel.h"
 #include "tests/migration/s390x/a-b-bios.h"
 
+static void bootfile_delete(void)
+{
+    unlink(bootpath);
+    g_free(bootpath);
+    bootpath = NULL;
+}
+
 static void bootfile_create(char *dir, bool suspend_me)
 {
     const char *arch = qtest_get_arch();
     unsigned char *content;
     size_t len;
 
+    if (bootpath) {
+        bootfile_delete();
+    }
+
     bootpath = g_strdup_printf("%s/bootsect", dir);
     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
         /* the assembled x86 boot sector should be exactly one sector large */
@@ -177,13 +188,6 @@ static void bootfile_create(char *dir, bool suspend_me)
     fclose(bootfile);
 }
 
-static void bootfile_delete(void)
-{
-    unlink(bootpath);
-    g_free(bootpath);
-    bootpath = NULL;
-}
-
 /*
  * Wait for some output in the serial output file,
  * we get an 'A' followed by an endless string of 'B's

-- 
2.46.0