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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1730714060; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FHtrzReOa/j1KY02SZCyfWRb9w55Kdov5F5zFubNRVY=; b=M82NGvVk7UYXtmxRYkmeTiKiNpGBYapfoB13ZaC/DLt4VFqGYRtDQmSFnh/JU4QljkebAi LcJfP1aR7lAL9j0ur/5qQ8aCHEwOElYeA+hu/SSHp3hEFBnt26D0LdlL1qkJz6r9VnI/yW IIqOe9hi99JHXF2sjOm057FkS+M+YVA= X-MC-Unique: ae7mR26WNZ-mueoVNGoICw-1 From: Michal Privoznik To: qemu-devel@nongnu.org Cc: michael.roth@amd.com, kkostiuk@redhat.com Subject: [PATCH 2/4] qga: Invert logic on return value in main() Date: Mon, 4 Nov 2024 10:54:08 +0100 Message-ID: <5182ceb139a43aacaab2c8b833bf52b13279dcf0.1730713917.git.mprivozn@redhat.com> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" Current logic on return value ('ret' variable) in main() is error prone. The variable is initialized to EXIT_SUCCESS and then set to EXIT_FAILURE on error paths. This makes it very easy to forget to set the variable to indicate error when adding new error path, as is demonstrated by handling of initialize_agent() failure. It's simply lacking setting of the variable. There's just one case where success should be indicated: when dumping the config ('-D' cmd line argument). To resolve this, initialize the variable to failure value and set it explicitly to success value in that one specific case. Signed-off-by: Michal Privoznik --- qga/main.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/qga/main.c b/qga/main.c index 4a695235f0..c003aacbe0 100644 --- a/qga/main.c +++ b/qga/main.c @@ -1579,7 +1579,7 @@ static void stop_agent(GAState *s, bool requested) =20 int main(int argc, char **argv) { - int ret =3D EXIT_SUCCESS; + int ret =3D EXIT_FAILURE; GAState *s; GAConfig *config =3D g_new0(GAConfig, 1); int socket_activation; @@ -1607,7 +1607,6 @@ int main(int argc, char **argv) socket_activation =3D check_socket_activation(); if (socket_activation > 1) { g_critical("qemu-ga only supports listening on one socket"); - ret =3D EXIT_FAILURE; goto end; } if (socket_activation) { @@ -1631,7 +1630,6 @@ int main(int argc, char **argv) =20 if (!config->method) { g_critical("unsupported listen fd type"); - ret =3D EXIT_FAILURE; goto end; } } else if (config->channel_path =3D=3D NULL) { @@ -1643,13 +1641,13 @@ int main(int argc, char **argv) config->channel_path =3D g_strdup(QGA_SERIAL_PATH_DEFAULT); } else { g_critical("must specify a path for this channel"); - ret =3D EXIT_FAILURE; goto end; } } =20 if (config->dumpconf) { config_dump(config); + ret =3D EXIT_SUCCESS; goto end; } =20 --=20 2.45.2