adb root 功能不支持不带版本号的 apex

[Kazurin-775]

• 系统：Android 11 (ArrowOS)
• 设备：小米 6X (wayne)
• Magisk: v24.3
• Sui: 当前 CI 最新版 (f8eee8c) v12.6.1-release

在手机上创建 enable_adb_root 文件并重启后，adb root 仍然提示 adbd cannot run as root in production builds。

日志关键部分：

01-08 07:03:35.164   704   704 I Sui     : Setup adb root support: /dev/PwR6B9/.magisk/modules/zygisk-sui
01-08 07:03:35.168   704   704 I Sui     : Use adbd from /apex
01-08 07:03:35.169   704   704 I Sui     : /apex/com.android.adbd/bin/adbd is dynamically linked
01-08 07:03:35.170   704   704 V Sui     : /apex/com.android.adbd/bin/adbd: uid=0, gid=2000, mode=100755, context=u:object_r:adbd_exec:s0
01-08 07:03:35.170   704   704 V Sui     : /apex/com.android.adbd/bin: uid=0, gid=2000, mode=40751, context=u:object_r:system_file:s0
01-08 07:03:35.180   704   704 E Sui     : Cannot find versioned apex
01-08 07:03:35.195   706   706 I Sui     : Exited with 13

完整开机日志：logcat-coldboot.txt

通过 adb 检查 /apex 发现所有项目都不带版本号：

wayne:/ # ls /apex
com.android.adbd           com.android.i18n           com.android.neuralnetworks  com.android.sdkext
com.android.art            com.android.ipsec          com.android.os.statsd       com.android.tethering
com.android.cellbroadcast  com.android.media          com.android.permission      com.android.tzdata
com.android.conscrypt      com.android.media.swcodec  com.android.resolv          com.android.vndk.v30
com.android.extservices    com.android.mediaprovider  com.android.runtime         com.android.wifi
wayne:/ #

检查 /system/apex 发现所有 apex 都是未压缩的「扁平化 apex」，不是 .capex 格式的压缩包：

wayne:/ # ls -l /system/apex
total 80
drwxr-xr-x 6 root root 4096 2009-01-01 08:00 com.android.adbd
drwxr-xr-x 7 root root 4096 2009-01-01 08:00 com.android.art.release
drwxr-xr-x 3 root root 4096 2009-01-01 08:00 com.android.cellbroadcast
...
wayne:/ # ls -la /system/apex/com.android.adbd/
total 32
drwxr-xr-x  6 root root  4096 2009-01-01 08:00 .
drwxr-xr-x 22 root root  4096 2009-01-01 08:00 ..
-rw-r--r--  1 root root   218 2009-01-01 08:00 apex_manifest.pb
-rw-r--r--  1 root root  1032 2009-01-01 08:00 apex_pubkey
drwxr-x--x  2 root shell 4096 2009-01-01 08:00 bin
drwxr-xr-x  2 root root  4096 2009-01-01 08:00 etc
drwxr-xr-x  2 root root  4096 2009-01-01 08:00 lib
drwxr-xr-x  2 root root  4096 2009-01-01 08:00 lib64

[RikkaW]

Sui/module/src/main/cpp/main/adb_root.hpp

Lines 197 to 222 in f8eee8c

	auto apex = "/apex/"sv;
	strncpy(versioned_adbd, apex.data(), apex.length());
	bool found = false;
	uint64_t version = 0;
	auto adbd_prefix = "com.android.adbd@"sv;
	while (dirent *entry = dir.ReadEntry()) {
	std::string_view d_name{entry->d_name};
	if (d_name.length() <= adbd_prefix.length() ||
	d_name.substr(0, adbd_prefix.length()) != adbd_prefix)
	continue;
	const char *version_string = entry->d_name + adbd_prefix.length();
	int new_version = atoll(version_string);
	if (new_version >= version) {
	strncpy(versioned_adbd + apex.length(), d_name.data(), d_name.length());
	LOGI("Found versioned apex %s", versioned_adbd);
	found = true;
	}
	}
	if (!found) {
	LOGE("Cannot find versioned apex");
	return ERR_OTHER;
	}

不要乱猜理由，就是假定了一定要有带版本号的 apex 文件夹而已（

[Kazurin-775]

抱歉，看文档看漏了一句话，您说得对