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init: fix debuggable paths for recovery mode

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Since recovery mode doesn't switch root to /first_stage_ramdisk, we need
to update the debuggable file paths for recovery mode. Without this,
adb needs to be authorized in recovery mode even with a debug
vendor_ramdisk.

Bug: 182612208
Test: verify adb is authorized on pixel 5
Signed-off-by: Will McVicker <willmcvicker@google.com>
Change-Id: I557429e1834efcdd92ba0e135377055ffa677137
This commit is contained in:
Will McVicker 2021-03-12 17:32:14 -08:00
parent d9bb7106bc
commit 8891c2002e
1 changed files with 12 additions and 3 deletions
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15
init/first_stage_init.cpp
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@ -337,12 +337,21 @@ int FirstStageMain(int argc, char** argv) {
SwitchRoot("/first_stage_ramdisk");
}
std::string force_debuggable("/force_debuggable");
std::string adb_debug_prop("/adb_debug.prop");
std::string userdebug_sepolicy("/userdebug_plat_sepolicy.cil");
if (IsRecoveryMode()) {
// Update these file paths since we didn't switch root
force_debuggable.insert(0, "/first_stage_ramdisk");
adb_debug_prop.insert(0, "/first_stage_ramdisk");
userdebug_sepolicy.insert(0, "/first_stage_ramdisk");
}
// If this file is present, the second-stage init will use a userdebug sepolicy
// and load adb_debug.prop to allow adb root, if the device is unlocked.
if (access("/force_debuggable", F_OK) == 0) {
if (access(force_debuggable.c_str(), F_OK) == 0) {
std::error_code ec; // to invoke the overloaded copy_file() that won't throw.
if (!fs::copy_file("/adb_debug.prop", kDebugRamdiskProp, ec) ||
!fs::copy_file("/userdebug_plat_sepolicy.cil", kDebugRamdiskSEPolicy, ec)) {
if (!fs::copy_file(adb_debug_prop, kDebugRamdiskProp, ec) ||
!fs::copy_file(userdebug_sepolicy, kDebugRamdiskSEPolicy, ec)) {
LOG(ERROR) << "Failed to setup debug ramdisk";
} else {
// setenv for second-stage init to read above kDebugRamdisk* files.