diff options
Diffstat (limited to '')
| -rw-r--r-- | twrp-functions.cpp | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/twrp-functions.cpp b/twrp-functions.cpp index 066e6e57b..28d0ba58e 100644 --- a/twrp-functions.cpp +++ b/twrp-functions.cpp @@ -8,11 +8,13 @@ #include <dirent.h> #include <time.h> #include <errno.h> +#include <sys/reboot.h> #include "twrp-functions.hpp" #include "partitions.hpp" #include "common.h" #include "data.hpp" +#include "bootloader.h" /* Checks md5 for a path Return values: @@ -257,4 +259,130 @@ unsigned long TWFunc::Get_File_Size(string Path) { if (stat(Path.c_str(), &st) != 0) return 0; return st.st_size; +} + +static const char *COMMAND_FILE = "/cache/recovery/command"; +static const char *INTENT_FILE = "/cache/recovery/intent"; +static const char *LOG_FILE = "/cache/recovery/log"; +static const char *LAST_LOG_FILE = "/cache/recovery/last_log"; +static const char *LAST_INSTALL_FILE = "/cache/recovery/last_install"; +static const char *CACHE_ROOT = "/cache"; +static const char *SDCARD_ROOT = "/sdcard"; +static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log"; +static const char *TEMPORARY_INSTALL_FILE = "/tmp/last_install"; + +// close a file, log an error if the error indicator is set +void TWFunc::check_and_fclose(FILE *fp, const char *name) { + fflush(fp); + if (ferror(fp)) LOGE("Error in %s\n(%s)\n", name, strerror(errno)); + fclose(fp); +} + +void TWFunc::copy_log_file(const char* source, const char* destination, int append) { + FILE *log = fopen_path(destination, append ? "a" : "w"); + if (log == NULL) { + LOGE("Can't open %s\n", destination); + } else { + FILE *tmplog = fopen(source, "r"); + if (tmplog != NULL) { + if (append) { + fseek(tmplog, tmplog_offset, SEEK_SET); // Since last write + } + char buf[4096]; + while (fgets(buf, sizeof(buf), tmplog)) fputs(buf, log); + if (append) { + tmplog_offset = ftell(tmplog); + } + check_and_fclose(tmplog, source); + } + check_and_fclose(log, destination); + } +} + +// clear the recovery command and prepare to boot a (hopefully working) system, +// copy our log file to cache as well (for the system to read), and +// record any intent we were asked to communicate back to the system. +// this function is idempotent: call it as many times as you like. +void TWFunc::twfinish_recovery(const char *send_intent) { + // By this point, we're ready to return to the main system... + if (send_intent != NULL) { + FILE *fp = fopen_path(INTENT_FILE, "w"); + if (fp == NULL) { + LOGE("Can't open %s\n", INTENT_FILE); + } else { + fputs(send_intent, fp); + check_and_fclose(fp, INTENT_FILE); + } + } + + // Copy logs to cache so the system can find out what happened. + copy_log_file(TEMPORARY_LOG_FILE, LOG_FILE, true); + copy_log_file(TEMPORARY_LOG_FILE, LAST_LOG_FILE, false); + copy_log_file(TEMPORARY_INSTALL_FILE, LAST_INSTALL_FILE, false); + chmod(LOG_FILE, 0600); + chown(LOG_FILE, 1000, 1000); // system user + chmod(LAST_LOG_FILE, 0640); + chmod(LAST_INSTALL_FILE, 0644); + + // Reset to normal system boot so recovery won't cycle indefinitely. + struct bootloader_message boot; + memset(&boot, 0, sizeof(boot)); + set_bootloader_message(&boot); + + // Remove the command file, so recovery won't repeat indefinitely. + if (system("mount /cache") != 0 || + (unlink(COMMAND_FILE) && errno != ENOENT)) { + LOGW("Can't unlink %s\n", COMMAND_FILE); + } + + system("umount /cache"); + sync(); // For good measure. +} + +// reboot: Reboot the system. Return -1 on error, no return on success +int TWFunc::tw_reboot(RebootCommand command) +{ + // Always force a sync before we reboot + sync(); + + switch (command) + { + case rb_current: + case rb_system: + twfinish_recovery("s"); + sync(); + check_and_run_script("/sbin/rebootsystem.sh", "reboot system"); + return reboot(RB_AUTOBOOT); + case rb_recovery: + check_and_run_script("/sbin/rebootrecovery.sh", "reboot recovery"); + return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "recovery"); + case rb_bootloader: + check_and_run_script("/sbin/rebootbootloader.sh", "reboot bootloader"); + return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "bootloader"); + case rb_poweroff: + check_and_run_script("/sbin/poweroff.sh", "power off"); + return reboot(RB_POWER_OFF); + case rb_download: + check_and_run_script("/sbin/rebootdownload.sh", "reboot download"); + return __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, (void*) "download"); + return 1; + default: + return -1; + } + return -1; +} + +void TWFunc::check_and_run_script(const char* script_file, const char* display_name) +{ + // Check for and run startup script if script exists + struct stat st; + if (stat(script_file, &st) == 0) { + ui_print("Running %s script...\n", display_name); + char command[255]; + strcpy(command, "chmod 755 "); + strcat(command, script_file); + system(command); + system(script_file); + ui_print("\nFinished running %s script.\n", display_name); + } }
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