mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-28 04:25:27 +00:00
132 lines
3.1 KiB
C++
132 lines
3.1 KiB
C++
#include <unistd.h>
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#include <cstdio>
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#include <cstdlib>
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#include <string>
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#include <vector>
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#include <magisk.hpp>
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#include <utils.hpp>
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#include <selinux.hpp>
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using namespace std;
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#define BBEXEC_CMD DATABIN "/busybox", "sh"
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static void set_standalone() {
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setenv("ASH_STANDALONE", "1", 1);
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};
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void exec_script(const char *script) {
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exec_t exec {
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.pre_exec = set_standalone,
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.fork = fork_no_zombie
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};
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exec_command_sync(exec, BBEXEC_CMD, script);
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}
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void exec_common_scripts(const char *stage) {
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LOGI("* Running %s.d scripts\n", stage);
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char path[4096];
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char *name = path + sprintf(path, SECURE_DIR "/%s.d", stage);
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auto dir = xopen_dir(path);
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if (!dir)
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return;
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int dfd = dirfd(dir.get());
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bool pfs = stage == "post-fs-data"sv;
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*(name++) = '/';
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for (dirent *entry; (entry = xreaddir(dir.get()));) {
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if (entry->d_type == DT_REG) {
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if (faccessat(dfd, entry->d_name, X_OK, 0) != 0)
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continue;
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LOGI("%s.d: exec [%s]\n", stage, entry->d_name);
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strcpy(name, entry->d_name);
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exec_t exec {
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.pre_exec = set_standalone,
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.fork = pfs ? fork_no_zombie : fork_dont_care
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};
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if (pfs)
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exec_command_sync(exec, BBEXEC_CMD, path);
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else
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exec_command(exec, BBEXEC_CMD, path);
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}
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}
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}
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void exec_module_scripts(const char *stage, const vector<string> &module_list) {
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LOGI("* Running module %s scripts\n", stage);
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char path[4096];
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bool pfs = stage == "post-fs-data"sv;
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for (auto &m : module_list) {
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const char* module = m.c_str();
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sprintf(path, MODULEROOT "/%s/%s.sh", module, stage);
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if (access(path, F_OK) == -1)
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continue;
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LOGI("%s: exec [%s.sh]\n", module, stage);
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exec_t exec {
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.pre_exec = set_standalone,
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.fork = pfs ? fork_no_zombie : fork_dont_care
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};
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if (pfs)
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exec_command_sync(exec, BBEXEC_CMD, path);
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else
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exec_command(exec, BBEXEC_CMD, path);
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}
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}
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constexpr char install_script[] = R"EOF(
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APK=%s
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log -t Magisk "apk_install: $APK"
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log -t Magisk "apk_install: `pm install -r $APK 2>&1`"
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rm -f $APK
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)EOF";
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void install_apk(const char *apk) {
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setfilecon(apk, "u:object_r:" SEPOL_FILE_TYPE ":s0");
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exec_t exec {
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.pre_exec = set_standalone,
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.fork = fork_no_zombie
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};
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char cmds[sizeof(install_script) + 4096];
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sprintf(cmds, install_script, apk);
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exec_command_sync(exec, BBEXEC_CMD, "-c", cmds);
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}
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[[noreturn]] static void abort(const char *msg) {
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fprintf(stderr, "%s\n\n", msg);
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exit(1);
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}
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constexpr char install_module_script[] = R"EOF(
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. /data/adb/magisk/util_functions.sh
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install_module
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exit 0
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)EOF";
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void install_module(const char *file) {
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if (getuid() != 0)
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abort("Run this command with root");
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if (access(DATABIN, F_OK) ||
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access(DATABIN "/busybox", X_OK) ||
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access(DATABIN "/util_functions.sh", F_OK))
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abort("Incomplete Magisk install");
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if (access(file, F_OK)) {
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char msg[4096];
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sprintf(msg, "'%s' does not exist", file);
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abort(msg);
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}
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setenv("OUTFD", "1", true);
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setenv("ZIPFILE", file, true);
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setenv("ASH_STANDALONE", "1", 1);
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int fd = xopen("/dev/null", O_RDONLY);
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xdup2(fd, STDERR_FILENO);
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close(fd);
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const char *argv[] = { BBEXEC_CMD, "-c", install_module_script };
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execve(argv[0], (char **) argv, environ);
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abort("Failed to execute BusyBox shell");
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}
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