From 1792d7d0a2dc18496e8fc52906163f9f73f3d931 Mon Sep 17 00:00:00 2001 From: Eric Blake Date: Wed, 23 Nov 2016 11:36:55 -0600 Subject: [PATCH] test-qga: Avoid qobject_from_jsonv("%"PRId64) The qobject_from_jsonv() function implements a pseudo-printf language for creating a QObject; however, it is hard-coded to only parse a subset of formats understood by -Wformat, and is not a straight synonym to bare printf(). In particular, any use of an int64_t integer works only if the system's definition of PRId64 matches what the parser expects; which works on glibc (%lld or %ld depending on 32- vs. 64-bit) and mingw (%I64d), but not on Mac OS (%qd). Rather than enhance the parser, it is just as easy to use normal printf() for this particular conversion, matching what is done elsewhere in this file [1], which is safe in this instance because the format does not contain any of the problematic differences (bare '%' or the '%s' format). The use of PRId64 for a variable named 'pid' is gross, but it is a sad reality of the 64-bit mingw environment, which mistakenly defines pid_t as a 64-bit type even though getpid() returns 'int' on that platform [2]. Our definition of the QGA GuestExec type defines 'pid' as a 64-bit entity, and we can't tighten it to 'int32' unless the mingw header is fixed. Using 'long long' instead of 'int64_t' just so that we can stick with qobject_from_jsonv("%lld") instead of printf() is not any prettier, since we may have later type churn anyways. [1] see 'git grep -A2 strdup_printf tests/test-qga.c' [2] https://bugzilla.redhat.com/show_bug.cgi?id=1397787 Reported by: G 3 Signed-off-by: Eric Blake Message-Id: <1479922617-4400-3-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster Signed-off-by: Markus Armbruster --- tests/test-qga.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tests/test-qga.c b/tests/test-qga.c index 40af649..868b02a 100644 --- a/tests/test-qga.c +++ b/tests/test-qga.c @@ -837,6 +837,7 @@ static void test_qga_guest_exec(gconstpointer fix) int64_t pid, now, exitcode; gsize len; bool exited; + char *cmd; /* exec 'echo foo bar' */ ret = qmp_fd(fixture->fd, "{'execute': 'guest-exec', 'arguments': {" @@ -851,9 +852,10 @@ static void test_qga_guest_exec(gconstpointer fix) /* wait for completion */ now = g_get_monotonic_time(); + cmd = g_strdup_printf("{'execute': 'guest-exec-status'," + " 'arguments': { 'pid': %" PRId64 " } }", pid); do { - ret = qmp_fd(fixture->fd, "{'execute': 'guest-exec-status'," - " 'arguments': { 'pid': %" PRId64 " } }", pid); + ret = qmp_fd(fixture->fd, cmd); g_assert_nonnull(ret); val = qdict_get_qdict(ret, "return"); exited = qdict_get_bool(val, "exited"); @@ -863,6 +865,7 @@ static void test_qga_guest_exec(gconstpointer fix) } while (!exited && g_get_monotonic_time() < now + 5 * G_TIME_SPAN_SECOND); g_assert(exited); + g_free(cmd); /* check stdout */ exitcode = qdict_get_int(val, "exitcode"); -- 2.7.4