Am 11.11.2013 13:52, schrieb Jan Kiszka:
> On 2013-11-11 13:41, Andreas Färber wrote:
>> Am 11.11.2013 08:44, schrieb Alexey Kardashevskiy:
>>> This converts +foo/-foo to "foo=on"/"foo=off" respectively when
>>> QEMU parser is used for the command line options.
>>>
>>> "-cpu" parsers in x86 and other architectures should be unaffected
>>> by this change.
>>>
>>> Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
>>> ---
>>> util/qemu-option.c | 6 ++++++
>>> 1 file changed, 6 insertions(+)
>>>
>>> diff --git a/util/qemu-option.c b/util/qemu-option.c
>>> index efcb5dc..6c8667c 100644
>>> --- a/util/qemu-option.c
>>> +++ b/util/qemu-option.c
>>> @@ -890,6 +890,12 @@ static int opts_do_parse(QemuOpts *opts, const char
>>> *params,
>>> if (strncmp(option, "no", 2) == 0) {
>>> memmove(option, option+2, strlen(option+2)+1);
>>> pstrcpy(value, sizeof(value), "off");
>>> + } else if (strncmp(option, "-", 1) == 0) {
>>> + memmove(option, option+1, strlen(option+1)+1);
>>> + pstrcpy(value, sizeof(value), "off");
>>> + } else if (strncmp(option, "+", 1) == 0) {
>>> + memmove(option, option+1, strlen(option+1)+1);
>>> + pstrcpy(value, sizeof(value), "on");
>>> } else {
>>> pstrcpy(value, sizeof(value), "on");
>>> }
>>
>> This looks like an interesting idea! However this is much too big a
>> change to just CC ppc folks on...
>>
>> Jan, I wonder if this might break slirp's hostfwd option?
>
> hostfwd starts with ":" in the simplest case - or what pattern do you
> have in mind?
Ah right, I had :8022-:22 or so in mind and mixed up optional host name
with optional source port.
Basically I'm checking for anything which is using the generic QemuOpts
parsing and where a literal + or - may lead to unexpected parsing
changes with this patch. Without having looked up more context for this
hunk, it should not affect foo=-bar but only where foo= is optional,
such as type names for driver= starting with either character (not aware
of such types though).
Andreas
>> Not sure what other options potentially starting with '-' might be
>> affected. Test cases would be a helpful way of demonstrating that this
>> change does not have undesired side effects.
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