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libc: implement SNDCTL_DSP_GETFMTS ioctl

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This I/O control is used to query the audio format, e.g. AFMT_S16_LE
in our case.

Fixes #4276.
This commit is contained in:
Josef Söntgen 2021-09-30 18:15:21 +02:00 committed by Norman Feske
parent 870c5c7a81
commit e6bd9fd7da
1 changed files with 26 additions and 0 deletions
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26
repos/libports/src/lib/libc/vfs_plugin.cc
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@ -1308,6 +1308,31 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
handled = true;
} else if (request == SNDCTL_DSP_GETFMTS) {
if (!argp) return { true, EINVAL };
monitor().monitor([&] {
_with_info(*fd, [&] (Xml_node info) {
if (info.type() != "oss") {
return;
}
unsigned int const format =
info.attribute_value("format", 0U);
if (format == 0U) {
result = EINVAL;
return;
}
*(int *)argp = format;
handled = true;
});
return Fn::COMPLETE;
});
} else if (request == SNDCTL_DSP_GETISPACE) {
if (!argp) return { true, EINVAL };
@ -1638,6 +1663,7 @@ int Libc::Vfs_plugin::ioctl(File_descriptor *fd, unsigned long request, char *ar
case SNDCTL_DSP_CHANNELS:
case SNDCTL_DSP_CURRENT_OPTR:
case SNDCTL_DSP_GETERROR:
case SNDCTL_DSP_GETFMTS:
case SNDCTL_DSP_GETISPACE:
case SNDCTL_DSP_GETOPTR:
case SNDCTL_DSP_GETOSPACE: