mirror of
https://github.com/topjohnwu/Magisk.git
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162 lines
3.1 KiB
C
162 lines
3.1 KiB
C
/*
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** Copyright 2017, John Wu (@topjohnwu)
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** Copyright 2010, Adam Shanks (@ChainsDD)
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** Copyright 2008, Zinx Verituse (@zinxv)
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**
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*/
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#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 <paths.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include "magisk.h"
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#include "su.h"
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/* intent actions */
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#define ACTION_REQUEST "start", "-n", REQUESTOR "/" REQUESTOR_PREFIX ".RequestActivity"
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#define ACTION_NOTIFY "start", "-n", REQUESTOR "/" REQUESTOR_PREFIX ".NotifyActivity"
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#define ACTION_RESULT "broadcast", "-n", REQUESTOR "/" REQUESTOR_PREFIX ".SuReceiver"
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#define AM_PATH "/system/bin/app_process", "/system/bin", "com.android.commands.am.Am"
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static char *get_command(const struct su_request *to) {
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if (to->command)
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return to->command;
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if (to->shell)
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return to->shell;
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return DEFAULT_SHELL;
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}
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static void silent_run(char* const args[]) {
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set_identity(0);
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if (fork())
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return;
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int zero = open("/dev/zero", O_RDONLY | O_CLOEXEC);
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dup2(zero, 0);
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int null = open("/dev/null", O_WRONLY | O_CLOEXEC);
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dup2(null, 1);
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dup2(null, 2);
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setenv("CLASSPATH", "/system/framework/am.jar", 1);
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execv(args[0], args);
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PLOGE("exec am");
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_exit(EXIT_FAILURE);
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}
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static int setup_user(struct su_context *ctx, char* user) {
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switch (ctx->info->multiuser_mode) {
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case MULTIUSER_MODE_OWNER_ONLY: /* Should already be denied if not owner */
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case MULTIUSER_MODE_OWNER_MANAGED:
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sprintf(user, "%d", 0);
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return ctx->info->uid / 100000;
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case MULTIUSER_MODE_USER:
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sprintf(user, "%d", ctx->info->uid / 100000);
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break;
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}
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return 0;
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}
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void app_send_result(struct su_context *ctx, policy_t policy) {
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char fromUid[16];
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sprintf(fromUid, "%d", ctx->info->uid);
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char toUid[16];
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sprintf(toUid, "%d", ctx->to.uid);
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char pid[16];
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sprintf(pid, "%d", ctx->pid);
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char user[16];
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int notify = setup_user(ctx, user);
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// Send notice to manager, enable logging
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char *result_command[] = {
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AM_PATH,
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ACTION_RESULT,
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"--user",
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user,
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"--ei",
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"mode",
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"0",
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"--ei",
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"from.uid",
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fromUid,
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"--ei",
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"to.uid",
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toUid,
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"--ei",
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"pid",
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pid,
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"--es",
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"command",
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get_command(&ctx->to),
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"--es",
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"action",
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policy == ALLOW ? "allow" : "deny",
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NULL
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};
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silent_run(result_command);
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// Send notice to user (if needed) to create toasts
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if (notify) {
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sprintf(user, "%d", notify);
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char *notify_command[] = {
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AM_PATH,
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ACTION_RESULT,
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"--user",
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user,
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"--ei",
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"mode",
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"1",
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"--ei",
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"from.uid",
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fromUid,
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"--es",
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"action",
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policy == ALLOW ? "allow" : "deny",
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NULL
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};
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silent_run(notify_command);
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}
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}
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void app_send_request(struct su_context *ctx) {
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char user[16];
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int notify = setup_user(ctx, user);
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char *request_command[] = {
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AM_PATH,
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ACTION_REQUEST,
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"--user",
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user,
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"--es",
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"socket",
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ctx->path.sock_path,
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"--ez",
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"timeout",
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notify ? "false" : "true",
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NULL
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};
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silent_run(request_command);
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// Send notice to user to tell them root is managed by owner
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if (notify) {
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sprintf(user, "%d", notify);
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char *notify_command[] = {
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AM_PATH,
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ACTION_RESULT,
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"--user",
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user,
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"--ei",
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"mode",
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"2",
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NULL
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};
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silent_run(notify_command);
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}
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}
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