[PATCH v5 04/18] tests/qtest: migration-test: Avoid using hardcoded /tmp

[Bin Meng <bmeng.cn@gmail.com>]

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

This case was written to use hardcoded /tmp directory for temporary
files. Update to use g_dir_make_tmp() for a portable implementation.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---

Changes in v5:
- Use g_autoptr(GError)

Changes in v4:
- Update the error reporting by using the GError "error" argument
  of g_dir_make_tmp()
- Remove the const from tmpfs declaration

Changes in v3:
- Split to a separate patch

 tests/qtest/migration-test.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index 0d153d6b5e..ef4427ff4d 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -102,7 +102,7 @@ static bool ufd_version_check(void)
 
 #endif
 
-static const char *tmpfs;
+static char *tmpfs;
 
 /* The boot file modifies memory area in [start_address, end_address)
  * repeatedly. It outputs a 'B' at a fixed rate while it's still running.
@@ -2451,10 +2451,10 @@ static bool kvm_dirty_ring_supported(void)
 
 int main(int argc, char **argv)
 {
-    char template[] = "/tmp/migration-test-XXXXXX";
     const bool has_kvm = qtest_has_accel("kvm");
     const bool has_uffd = ufd_version_check();
     const char *arch = qtest_get_arch();
+    g_autoptr(GError) err = NULL;
     int ret;
 
     g_test_init(&argc, &argv, NULL);
@@ -2479,9 +2479,10 @@ int main(int argc, char **argv)
         return g_test_run();
     }
 
-    tmpfs = g_mkdtemp(template);
+    tmpfs = g_dir_make_tmp("migration-test-XXXXXX", &err);
     if (!tmpfs) {
-        g_test_message("g_mkdtemp on path (%s): %s", template, strerror(errno));
+        g_test_message("g_dir_make_tmp on path (%s): %s", tmpfs,
+                       err->message);
     }
     g_assert(tmpfs);
 
@@ -2612,6 +2613,7 @@ int main(int argc, char **argv)
         g_test_message("unable to rmdir: path (%s): %s",
                        tmpfs, strerror(errno));
     }
+    g_free(tmpfs);
 
     return ret;
 }
-- 
2.34.1