qdev: Add help for device properties
When called with property "?", a list of supported properties will be printed (instead of an error message). This is useful for command lines like qemu -device e1000,? and was already standard for other options like model=? Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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@ -544,8 +544,19 @@ int qdev_prop_parse(DeviceState *dev, const char *name, const char *value)
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prop = qdev_prop_find(dev, name);
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if (!prop) {
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if (strcmp(name, "?") != 0) {
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fprintf(stderr, "property \"%s.%s\" not found\n",
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dev->info->name, name);
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} else {
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fprintf(stderr, "supported properties:\n");
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if (dev->info->props != NULL) {
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Property *props = dev->info->props;
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while (props->name) {
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fprintf(stderr, "%s.%s\n", dev->info->name, props->name);
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props++;
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}
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}
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}
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return -1;
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}
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if (!prop->info->parse) {
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