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universal7885: aidl-support: Fork subprocess to setuid

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This commit is contained in:
roynatech2544 2022-10-11 02:48:26 +09:00
commit b226436fc7
4 changed files with 20 additions and 9 deletions
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3
universal7885-common/apps/aidl-support/fm/default/Android.bp
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@ -23,12 +23,9 @@ cc_binary {
"libfileio",
"libutils",
"audioflinger-aidl-cpp",
"audiopolicy-aidl-cpp",
"audiopolicy-types-aidl-cpp",
"libaudiofoundation",
"libaudioutils",
"libaudioclient",
"libaudiopolicy",
"libaudiomanager",
"vendor.eureka.hardware.fmradio-V1-ndk",
],

16
universal7885-common/apps/aidl-support/fm/default/FMAudioRouteControl.cpp
View file

@ -17,13 +17,15 @@
#include <media/AudioSystem.h>
#include <media/IAudioFlinger.h>
#include <unistd.h>
#define FM_FAILURE (-1)
#define FM_SUCCESS 0
#define IOHANDLE 13
using namespace android;
int audioflinger_exynos7885_forceroute (bool speaker) {
static int audioflinger_exynos7885_forceroute(bool speaker) {
const sp<IAudioFlinger> &af = AudioSystem::get_audio_flinger();
if (af == 0)
return PERMISSION_DENIED;
@ -34,3 +36,15 @@ int audioflinger_exynos7885_forceroute (bool speaker) {
}
return FM_SUCCESS;
}
void setAudioFlingerSpeaker(bool enable) {
pid_t pid;
if ((pid = fork()) < 0) {
return;
}
if (pid == 0) {
setuid(1041);
audioflinger_exynos7885_forceroute(enable);
}
}

7
universal7885-common/apps/aidl-support/fm/default/FMDevControl.cpp
View file

@ -16,12 +16,11 @@
#include <fm_slsi-impl.h>
#include <unistd.h>
#include <cassert>
#include <fcntl.h>
// FMAudioRouteControl.cpp
extern int audioflinger_exynos7885_forceroute(bool speaker);
extern void setAudioFlingerSpeaker(bool enable);
namespace aidl::vendor::eureka::hardware::fmradio {
@ -86,9 +85,7 @@ static int fd = -1;
fm_radio_slsi::stop_search(fd);
break;
case SetType::SET_TYPE_FM_SPEAKER_ROUTE:
seteuid(1041 /* AudioServer UID */);
audioflinger_exynos7885_forceroute(value);
seteuid(0);
setAudioFlingerSpeaker(value);
break;
default:
break;

3
universal7885-common/sepolicy/private/hal_fmradio_default.te
View file

@ -13,3 +13,6 @@ allow hal_fmradio_default sysfs_virtual:dir search;
allow hal_fmradio_default fm_radio_device:chr_file { read write open ioctl };
allow hal_fmradio_default self:capability setuid;
binder_call(hal_fmradio_default, audioserver)
binder_call(audioserver, hal_fmradio_default)