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https://github.com/topjohnwu/Magisk.git
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80cd85b061
In commit 8d4c407, native Magisk always launches an activity for
communicating with Magisk Manager. While this works extremely well,
since it also workaround stupid OEMs that blocks broadcasts, it has a
problem: launching an activity will claim the focus of the device,
which could be super annoying in some circumstances.
This commit adds a new feature to run a broadcast test on boot complete.
If Magisk Manager successfully receives the broadcast, it will toggle
a setting in magiskd so all future su loggings and notifies will always
use broadcasts instead of launching activities.
Fix #1412
152 lines
3.5 KiB
C++
152 lines
3.5 KiB
C++
#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <magisk.h>
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#include <daemon.h>
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#include <utils.h>
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#include "su.h"
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bool CONNECT_BROADCAST;
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#define START_ACTIVITY \
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"/system/bin/app_process", "/system/bin", "com.android.commands.am.Am", \
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"start", "-n", nullptr, "--user", nullptr, "-f", "0x18000020", "-a"
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// 0x18000020 = FLAG_ACTIVITY_NEW_TASK|FLAG_ACTIVITY_MULTIPLE_TASK|FLAG_INCLUDE_STOPPED_PACKAGES
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#define START_BROADCAST \
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"/system/bin/app_process", "/system/bin", "com.android.commands.am.Am", \
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"broadcast", "-n", nullptr, "--user", nullptr, "-f", "0x00000020", \
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"-a", "android.intent.action.REBOOT", "--es", "action"
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// 0x00000020 = FLAG_INCLUDE_STOPPED_PACKAGES
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static inline const char *get_command(const su_request *to) {
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if (to->command[0])
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return to->command;
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if (to->shell[0])
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return to->shell;
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return DEFAULT_SHELL;
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}
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static inline void get_user(char *user, su_info *info) {
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sprintf(user, "%d",
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info->cfg[SU_MULTIUSER_MODE] == MULTIUSER_MODE_USER
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? info->uid / 100000
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: 0);
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}
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static inline void get_uid(char *uid, su_info *info) {
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sprintf(uid, "%d",
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info->cfg[SU_MULTIUSER_MODE] == MULTIUSER_MODE_OWNER_MANAGED
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? info->uid % 100000
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: info->uid);
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}
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static void exec_am_cmd(const char **args, su_info *info) {
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char component[128];
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sprintf(component, "%s/%s", info->str[SU_MANAGER].data(), args[3][0] == 'b' ? "a.h" : "a.m");
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char user[8];
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get_user(user, info);
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/* Fill in dynamic arguments */
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args[5] = component;
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args[7] = user;
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exec_t exec {
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.pre_exec = []() -> void {
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int null = xopen("/dev/null", O_WRONLY | O_CLOEXEC);
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dup2(null, STDOUT_FILENO);
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dup2(null, STDERR_FILENO);
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setenv("CLASSPATH", "/system/framework/am.jar", 1);
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},
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.fork = fork_dont_care,
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.argv = args
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};
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exec_command(exec);
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}
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#define LOG_BODY \
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"log", \
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"--ei", "from.uid", fromUid, \
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"--ei", "to.uid", toUid, \
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"--ei", "pid", pid, \
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"--ei", "policy", policy, \
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"--es", "command", get_command(&ctx->req), \
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"--ez", "notify", ctx->info->access.notify ? "true" : "false", \
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nullptr
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void app_log(su_context *ctx) {
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char fromUid[8];
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get_uid(fromUid, ctx->info);
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char toUid[8];
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sprintf(toUid, "%d", ctx->req.uid);
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char pid[8];
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sprintf(pid, "%d", ctx->pid);
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char policy[2];
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sprintf(policy, "%d", ctx->info->access.policy);
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if (CONNECT_BROADCAST) {
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const char *cmd[] = { START_BROADCAST, LOG_BODY };
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exec_am_cmd(cmd, ctx->info);
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} else {
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const char *cmd[] = { START_ACTIVITY, LOG_BODY };
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exec_am_cmd(cmd, ctx->info);
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}
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}
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#define NOTIFY_BODY \
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"notify", \
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"--ei", "from.uid", fromUid, \
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"--ei", "policy", policy, \
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nullptr
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void app_notify(su_context *ctx) {
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char fromUid[8];
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get_uid(fromUid, ctx->info);
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char policy[2];
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sprintf(policy, "%d", ctx->info->access.policy);
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if (CONNECT_BROADCAST) {
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const char *cmd[] = { START_BROADCAST, NOTIFY_BODY };
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exec_am_cmd(cmd, ctx->info);
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} else {
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const char *cmd[] = { START_ACTIVITY, NOTIFY_BODY };
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exec_am_cmd(cmd, ctx->info);
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}
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}
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void app_connect(const char *socket, su_info *info) {
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const char *cmd[] = {
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START_ACTIVITY, "request",
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"--es", "socket", socket,
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nullptr
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};
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exec_am_cmd(cmd, info);
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}
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void broadcast_test() {
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su_info info;
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get_db_settings(info.cfg);
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get_db_strings(info.str);
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validate_manager(info.str[SU_MANAGER], 0, &info.mgr_st);
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const char *cmd[] = { START_BROADCAST, "test", nullptr };
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exec_am_cmd(cmd, &info);
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}
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void socket_send_request(int fd, su_info *info) {
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write_key_token(fd, "uid", info->uid);
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write_string_be(fd, "eof");
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}
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