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qdev: Fix exit code for -device ?

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Help was shoehorned into device creation, qdev_device_add().  Since
help doesn't create a device, it returns NULL, which looks to callers
just like failed device creation.  Monitor handler do_device_add()
doesn't care, but main() exits unsuccessfully.

Move help out of device creation, into new qdev_device_help().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Markus Armbruster 2010-01-29 19:48:57 +01:00 committed by Anthony Liguori
parent 4a2594ddd3
commit ff952ba25d
3 changed files with 28 additions and 9 deletions
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28
hw/qdev.c
View File

@ -153,6 +153,24 @@ static int set_property(const char *name, const char *value, void *opaque)
return 0;
}
int qdev_device_help(QemuOpts *opts)
{
const char *driver;
DeviceInfo *info;
char msg[256];
driver = qemu_opt_get(opts, "driver");
if (driver && !strcmp(driver, "?")) {
for (info = device_info_list; info != NULL; info = info->next) {
qdev_print_devinfo(info, msg, sizeof(msg));
qemu_error("%s\n", msg);
}
return 1;
}
return 0;
}
DeviceState *qdev_device_add(QemuOpts *opts)
{
const char *driver, *path, *id;
@ -165,14 +183,6 @@ DeviceState *qdev_device_add(QemuOpts *opts)
qemu_error("-device: no driver specified\n");
return NULL;
}
if (strcmp(driver, "?") == 0) {
char msg[256];
for (info = device_info_list; info != NULL; info = info->next) {
qdev_print_devinfo(info, msg, sizeof(msg));
qemu_error("%s\n", msg);
}
return NULL;
}
/* find driver */
info = qdev_find_info(NULL, driver);
@ -726,7 +736,7 @@ void do_device_add(Monitor *mon, const QDict *qdict)
opts = qemu_opts_parse(&qemu_device_opts,
qdict_get_str(qdict, "config"), "driver");
if (opts)
if (opts && !qdev_device_help(opts))
qdev_device_add(opts);
}

1
hw/qdev.h
View File

@ -104,6 +104,7 @@ typedef struct GlobalProperty {
/*** Board API. This should go away once we have a machine config file. ***/
DeviceState *qdev_create(BusState *bus, const char *name);
int qdev_device_help(QemuOpts *opts);
DeviceState *qdev_device_add(QemuOpts *opts);
int qdev_init(DeviceState *dev) QEMU_WARN_UNUSED_RESULT;
void qdev_init_nofail(DeviceState *dev);

8
vl.c
View File

@ -4459,6 +4459,11 @@ char *qemu_find_file(int type, const char *name)
return buf;
}
static int device_help_func(QemuOpts *opts, void *opaque)
{
return qdev_device_help(opts);
}
static int device_init_func(QemuOpts *opts, void *opaque)
{
DeviceState *dev;
@ -5828,6 +5833,9 @@ int main(int argc, char **argv, char **envp)
module_call_init(MODULE_INIT_DEVICE);
if (qemu_opts_foreach(&qemu_device_opts, device_help_func, NULL, 0) != 0)
exit(0);
if (watchdog) {
i = select_watchdog(watchdog);
if (i > 0)