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修改安卓源码实现挂载fat32的u盘可以拥有777权限

2024-9-27 10:44| 发布者: L_S_H| 查看: 6| 评论: 0

类目： > 知识库文档编号: 1532

可以参考一下几个文件的修改，其中涉及到uamsk码的替换

diff --git a/system/core/sdcard/sdcard.cpp b/system/core/sdcard/sdcard.cpp

index 622de5b..ebc3961 100644

--- a/system/core/sdcard/sdcard.cpp

+++ b/system/core/sdcard/sdcard.cpp

@@ -197,10 +197,10 @@ static void run_sdcardfs(const std::string& source_path, const std::string& labe

AID_SDCARD_RW, 0006, derive_gid, default_normal, unshared_obb,

use_esdfs) ||

!sdcardfs_setup_secondary(dest_path_default, source_path, dest_path_read, uid, gid,

- multi_user, userid, AID_EVERYBODY, full_write ? 0027 : 0022,

+ multi_user, userid, AID_EVERYBODY, full_write ? 0027 : 0027,

derive_gid, default_normal, unshared_obb, use_esdfs) ||

!sdcardfs_setup_secondary(dest_path_default, source_path, dest_path_write, uid, gid,

- multi_user, userid, AID_EVERYBODY, full_write ? 0007 : 0022,

+ multi_user, userid, AID_EVERYBODY, full_write ? 0007 : 0007,

derive_gid, default_normal, unshared_obb, use_esdfs) ||

!sdcardfs_setup_secondary(dest_path_default, source_path, dest_path_full, uid, gid,

multi_user, userid, AID_EVERYBODY, 0007, derive_gid,

diff --git a/system/vold/model/PublicVolume.cpp b/system/vold/model/PublicVolume.cpp

index a707e08..0394740 100644

--- a/system/vold/model/PublicVolume.cpp

+++ b/system/vold/model/PublicVolume.cpp

@@ -135,20 +135,20 @@ status_t PublicVolume::doMount() {

setPath(mRawPath);

}

- if (fs_prepare_dir(mRawPath.c_str(), 0700, AID_ROOT, AID_ROOT)) {

+ if (fs_prepare_dir(mRawPath.c_str(), 0777, AID_ROOT, AID_ROOT)) {

PLOG(ERROR) << getId() << " failed to create mount points";

return -errno;

}

if (mFsType == "vfat") {

if (vfat::Mount(mDevPath, mRawPath, false, false, false, AID_ROOT,

- (isVisible ? AID_MEDIA_RW : AID_EXTERNAL_STORAGE),0007, true)) {

+ (isVisible ? AID_MEDIA_RW : AID_EXTERNAL_STORAGE),0000, true)) {

PLOG(ERROR) << getId() << " failed to mount " << mDevPath;

return -EIO;

}

} else if (mFsType == "exfat") {

if (exfat::Mount(mDevPath, mRawPath, AID_ROOT,

- (isVisible ? AID_MEDIA_RW : AID_EXTERNAL_STORAGE), 0007)) {

+ (isVisible ? AID_MEDIA_RW : AID_EXTERNAL_STORAGE), 0000)) {

PLOG(ERROR) << getId() << " failed to mount " << mDevPath;

return -EIO;

}

@@ -164,10 +164,10 @@ status_t PublicVolume::doMount() {

}

if (mUseSdcardFs) {

- if (fs_prepare_dir(mSdcardFsDefault.c_str(), 0700, AID_ROOT, AID_ROOT) ||

- fs_prepare_dir(mSdcardFsRead.c_str(), 0700, AID_ROOT, AID_ROOT) ||

- fs_prepare_dir(mSdcardFsWrite.c_str(), 0700, AID_ROOT, AID_ROOT) ||

- fs_prepare_dir(mSdcardFsFull.c_str(), 0700, AID_ROOT, AID_ROOT)) {

+ if (fs_prepare_dir(mSdcardFsDefault.c_str(), 0777, AID_ROOT, AID_ROOT) ||

+ fs_prepare_dir(mSdcardFsRead.c_str(), 0777, AID_ROOT, AID_ROOT) ||

+ fs_prepare_dir(mSdcardFsWrite.c_str(), 0777, AID_ROOT, AID_ROOT) ||

+ fs_prepare_dir(mSdcardFsFull.c_str(), 0777, AID_ROOT, AID_ROOT)) {

PLOG(ERROR) << getId() << " failed to create sdcardfs mount points";

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修改安卓源码实现挂载fat32的u盘可以拥有777权限

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