diff options
author | Eric Blake <eblake@redhat.com> | 2016-11-23 11:36:55 -0600 |
---|---|---|
committer | Markus Armbruster <armbru@redhat.com> | 2016-12-05 17:09:34 +0100 |
commit | 1792d7d0a2dc18496e8fc52906163f9f73f3d931 (patch) | |
tree | 241b051335899971c49d1a2aed9329b3a0d1d52b /tests/test-qga.c | |
parent | 043b5a49516f5037430e7864e23fc2fdd39f2b10 (diff) |
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 <programmingkidx@gmail.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1479922617-4400-3-git-send-email-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'tests/test-qga.c')
-rw-r--r-- | tests/test-qga.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/tests/test-qga.c b/tests/test-qga.c index 40af64987a..868b02a40f 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"); |