diff options
Diffstat (limited to 'recovery.cpp')
| -rw-r--r-- | recovery.cpp | 165 |
1 files changed, 161 insertions, 4 deletions
diff --git a/recovery.cpp b/recovery.cpp index 7f17b16ef..1d22b248a 100644 --- a/recovery.cpp +++ b/recovery.cpp @@ -25,6 +25,7 @@ #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <sys/klog.h> #include <sys/stat.h> #include <sys/types.h> #include <time.h> @@ -76,6 +77,13 @@ 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"; +static const char *LAST_KMSG_FILE = "/cache/recovery/last_kmsg"; +#define KLOG_DEFAULT_LEN (64 * 1024) + +#define KEEP_LOG_COUNT 10 + +// Number of lines per page when displaying a file on screen +#define LINES_PER_PAGE 30 RecoveryUI* ui = NULL; char* locale = NULL; @@ -161,6 +169,12 @@ fopen_path(const char *path, const char *mode) { return fp; } +static void redirect_stdio(const char* filename) { + // If these fail, there's not really anywhere to complain... + freopen(filename, "a", stdout); setbuf(stdout, NULL); + freopen(filename, "a", stderr); setbuf(stderr, NULL); +} + // close a file, log an error if the error indicator is set static void check_and_fclose(FILE *fp, const char *name) { @@ -251,6 +265,44 @@ set_sdcard_update_bootloader_message() { set_bootloader_message(&boot); } +// read from kernel log into buffer and write out to file +static void +save_kernel_log(const char *destination) { + int n; + char *buffer; + int klog_buf_len; + FILE *log; + + klog_buf_len = klogctl(KLOG_SIZE_BUFFER, 0, 0); + if (klog_buf_len <= 0) { + LOGE("Error getting klog size (%s), using default\n", strerror(errno)); + klog_buf_len = KLOG_DEFAULT_LEN; + } + + buffer = (char *)malloc(klog_buf_len); + if (!buffer) { + LOGE("Can't alloc %d bytes for klog buffer\n", klog_buf_len); + return; + } + + n = klogctl(KLOG_READ_ALL, buffer, klog_buf_len); + if (n < 0) { + LOGE("Error in reading klog (%s)\n", strerror(errno)); + free(buffer); + return; + } + + log = fopen_path(destination, "w"); + if (log == NULL) { + LOGE("Can't open %s\n", destination); + free(buffer); + return; + } + fwrite(buffer, n, 1, log); + check_and_fclose(log, destination); + free(buffer); +} + // How much of the temp log we have copied to the copy in cache. static long tmplog_offset = 0; @@ -298,8 +350,11 @@ copy_logs() { 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); + save_kernel_log(LAST_KMSG_FILE); chmod(LOG_FILE, 0600); chown(LOG_FILE, 1000, 1000); // system user + chmod(LAST_KMSG_FILE, 0600); + chown(LAST_KMSG_FILE, 1000, 1000); // system user chmod(LAST_LOG_FILE, 0640); chmod(LAST_INSTALL_FILE, 0644); sync(); @@ -665,6 +720,106 @@ wipe_data(int confirm, Device* device) { ui->Print("Data wipe complete.\n"); } +static void file_to_ui(const char* fn) { + FILE *fp = fopen_path(fn, "re"); + if (fp == NULL) { + ui->Print(" Unable to open %s: %s\n", fn, strerror(errno)); + return; + } + char line[1024]; + int ct = 0; + int key = 0; + redirect_stdio("/dev/null"); + while(fgets(line, sizeof(line), fp) != NULL) { + ui->Print("%s", line); + ct++; + if (ct % LINES_PER_PAGE == 0) { + // give the user time to glance at the entries + key = ui->WaitKey(); + + if (key == KEY_POWER) { + break; + } + + if (key == KEY_VOLUMEUP) { + // Go back by seeking to the beginning and dumping ct - n + // lines. It's ugly, but this way we don't need to store + // the previous offsets. The files we're dumping here aren't + // expected to be very large. + int i; + + ct -= 2 * LINES_PER_PAGE; + if (ct < 0) { + ct = 0; + } + fseek(fp, 0, SEEK_SET); + for (i = 0; i < ct; i++) { + fgets(line, sizeof(line), fp); + } + ui->Print("^^^^^^^^^^\n"); + } + } + } + + // If the user didn't abort, then give the user time to glance at + // the end of the log, sorry, no rewind here + if (key != KEY_POWER) { + ui->Print("\n--END-- (press any key)\n"); + ui->WaitKey(); + } + + redirect_stdio(TEMPORARY_LOG_FILE); + fclose(fp); +} + +static void choose_recovery_file(Device* device) { + unsigned int i; + unsigned int n; + static const char** title_headers = NULL; + char *filename; + const char* headers[] = { "Select file to view", + "", + NULL }; + // "Go back" + LAST_KMSG_FILE + KEEP_LOG_COUNT + terminating NULL entry + char* entries[KEEP_LOG_COUNT + 3]; + memset(entries, 0, sizeof(entries)); + + n = 0; + entries[n++] = strdup("Go back"); + + // Add kernel kmsg file if available + if ((ensure_path_mounted(LAST_KMSG_FILE) == 0) && (access(LAST_KMSG_FILE, R_OK) == 0)) { + entries[n++] = strdup(LAST_KMSG_FILE); + } + + // Add LAST_LOG_FILE + LAST_LOG_FILE.x + for (i = 0; i < KEEP_LOG_COUNT; i++) { + char *filename; + if (asprintf(&filename, (i==0) ? LAST_LOG_FILE : (LAST_LOG_FILE ".%d"), i) == -1) { + // memory allocation failure - return early. Should never happen. + return; + } + if ((ensure_path_mounted(filename) != 0) || (access(filename, R_OK) == -1)) { + free(filename); + entries[n++] = NULL; + break; + } + entries[n++] = filename; + } + + title_headers = prepend_title((const char**)headers); + + while(1) { + int chosen_item = get_menu_selection(title_headers, entries, 1, 0, device); + if (chosen_item == 0) break; + file_to_ui(entries[chosen_item]); + } + + for (i = 0; i < (sizeof(entries) / sizeof(*entries)); i++) { + free(entries[i]); + } +} + // Return REBOOT, SHUTDOWN, or REBOOT_BOOTLOADER. Returning NO_ACTION // means to take the default, which is to reboot or shutdown depending // on if the --shutdown_after flag was passed to recovery. @@ -760,6 +915,10 @@ prompt_and_wait(Device* device, int status) { ui->Print("\nAPPLY_CACHE is deprecated.\n"); break; + case Device::READ_RECOVERY_LASTLOG: + choose_recovery_file(device); + break; + case Device::APPLY_ADB_SIDELOAD: status = apply_from_adb(ui, &wipe_cache, TEMPORARY_INSTALL_FILE); if (status >= 0) { @@ -824,9 +983,7 @@ int main(int argc, char **argv) { time_t start = time(NULL); - // If these fail, there's not really anywhere to complain... - freopen(TEMPORARY_LOG_FILE, "a", stdout); setbuf(stdout, NULL); - freopen(TEMPORARY_LOG_FILE, "a", stderr); setbuf(stderr, NULL); + redirect_stdio(TEMPORARY_LOG_FILE); // If this binary is started with the single argument "--adbd", // instead of being the normal recovery binary, it turns into kind @@ -844,7 +1001,7 @@ main(int argc, char **argv) { load_volume_table(); ensure_path_mounted(LAST_LOG_FILE); - rotate_last_logs(10); + rotate_last_logs(KEEP_LOG_COUNT); get_args(&argc, &argv); const char *send_intent = NULL; |