[PATCH 32/51] tests/qtest: Fix ERROR_SHARING_VIOLATION for win32

[Bin Meng]

From: Bin Meng <bin.meng@windriver.com>

On Windows, the MinGW provided mkstemp() API opens the file with
exclusive access, denying other processes to read/write the file.
Such behavior prevents the QEMU executable from opening the file,
(e.g.: CreateFile returns ERROR_SHARING_VIOLATION).

This can be fixed by closing the file and reopening it.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 tests/qtest/ahci-test.c        | 14 ++++++++++++++
 tests/qtest/boot-serial-test.c | 13 +++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/tests/qtest/ahci-test.c b/tests/qtest/ahci-test.c
index f26cd6f86f..0e88cd0eef 100644
--- a/tests/qtest/ahci-test.c
+++ b/tests/qtest/ahci-test.c
@@ -1443,6 +1443,20 @@ static int prepare_iso(size_t size, unsigned char **buf, 
char **name)
     int fd = mkstemp(cdrom_path);
 
     g_assert(fd != -1);
+#ifdef _WIN32
+    /*
+     * On Windows, the MinGW provided mkstemp() API opens the file with
+     * exclusive access, denying other processes to read/write the file.
+     * Such behavior prevents the QEMU executable from opening the file,
+     * (e.g.: CreateFile returns ERROR_SHARING_VIOLATION).
+     *
+     * Close the file and reopen it.
+     */
+    close(fd);
+    fd = open(cdrom_path, O_WRONLY);
+    g_assert(fd != -1);
+#endif
+
     g_assert(buf);
     g_assert(name);
     patt = g_malloc(size);
diff --git a/tests/qtest/boot-serial-test.c b/tests/qtest/boot-serial-test.c
index 404adcfa20..fb6c81bf35 100644
--- a/tests/qtest/boot-serial-test.c
+++ b/tests/qtest/boot-serial-test.c
@@ -235,6 +235,19 @@ static void test_machine(const void *data)
 
     ser_fd = mkstemp(serialtmp);
     g_assert(ser_fd != -1);
+#ifdef _WIN32
+    /*
+     * On Windows, the MinGW provided mkstemp() API opens the file with
+     * exclusive access, denying other processes to read/write the file.
+     * Such behavior prevents the QEMU executable from opening the file,
+     * (e.g.: CreateFile returns ERROR_SHARING_VIOLATION).
+     *
+     * Close the file and reopen it.
+     */
+    close(ser_fd);
+    ser_fd = open(serialtmp, O_RDONLY);
+    g_assert(ser_fd != -1);
+#endif
 
     if (test->kernel) {
         code = test->kernel;
-- 
2.34.1