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author | Patrick Tjin <pattjin@google.com> | 2014-12-10 22:21:14 +0000 |
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committer | Android Git Automerger <android-git-automerger@android.com> | 2014-12-10 22:21:14 +0000 |
commit | 8e8d5de4779e0f8f70cd39bf267026fff35f0a88 (patch) | |
tree | b0e64e1cb1a3e4fd4b106ab380873a793c770add | |
parent | 4f9fcffce7328b8f3f9a8384c51220f4a2cda8ba (diff) | |
parent | cd055ee72a5efaf4bcbc0f81692410d3ffcda5e0 (diff) | |
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am cd055ee7: Save kernel logs to /cache/recovery
* commit 'cd055ee72a5efaf4bcbc0f81692410d3ffcda5e0':
Save kernel logs to /cache/recovery
-rw-r--r-- | recovery.cpp | 66 |
1 files changed, 60 insertions, 6 deletions
diff --git a/recovery.cpp b/recovery.cpp index e1a2a96..176ac7a 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 +77,8 @@ 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 @@ -259,6 +262,44 @@ 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; @@ -306,8 +347,11 @@ 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(); @@ -695,15 +739,26 @@ static void file_to_ui(const char* fn) { } static void choose_recovery_file(Device* device) { - int i; + unsigned int i; + unsigned int n; static const char** title_headers = NULL; char *filename; const char* headers[] = { "Select file to view", "", NULL }; - char* entries[KEEP_LOG_COUNT + 2]; + // "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) { @@ -712,13 +767,12 @@ static void choose_recovery_file(Device* device) { } if ((ensure_path_mounted(filename) != 0) || (access(filename, R_OK) == -1)) { free(filename); - entries[i+1] = NULL; + entries[n++] = NULL; break; } - entries[i+1] = filename; + entries[n++] = filename; } - entries[0] = strdup("Go back"); title_headers = prepend_title((const char**)headers); while(1) { @@ -727,7 +781,7 @@ static void choose_recovery_file(Device* device) { file_to_ui(entries[chosen_item]); } - for (i = 0; i < KEEP_LOG_COUNT + 1; i++) { + for (i = 0; i < (sizeof(entries) / sizeof(*entries)); i++) { free(entries[i]); } } |