| /* | |
| * Copyright (C) 2006-2017 The Android Open Source Project | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| */ | |
| #include "logcat.h" | |
| #include <android-base/macros.h> | |
| #include <arpa/inet.h> | |
| #include <assert.h> | |
| #include <ctype.h> | |
| #include <dirent.h> | |
| #include <errno.h> | |
| #include <fcntl.h> | |
| #include <getopt.h> | |
| #include <math.h> | |
| #include <pthread.h> | |
| #include <sched.h> | |
| #include <stdarg.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <sys/cdefs.h> | |
| #include <sys/resource.h> | |
| #include <sys/socket.h> | |
| #include <sys/stat.h> | |
| #include <sys/types.h> | |
| #include <time.h> | |
| #include <unistd.h> | |
| #include <atomic> | |
| #include <memory> | |
| #include <string> | |
| #include <utility> | |
| #include <vector> | |
| #include <android-base/file.h> | |
| #include <android-base/properties.h> | |
| #include <android-base/stringprintf.h> | |
| #include <android-base/strings.h> | |
| #include <cutils/sockets.h> | |
| #include <log/event_tag_map.h> | |
| #include <log/logprint.h> | |
| #include <private/android_logger.h> | |
| #include <processgroup/sched_policy.h> | |
| #include <system/thread_defs.h> | |
| #include <pcrecpp.h> | |
| #define DEFAULT_MAX_ROTATED_LOGS 4 | |
| struct log_device_t { | |
| const char* device; | |
| bool binary; | |
| struct logger* logger; | |
| struct logger_list* logger_list; | |
| bool printed; | |
| log_device_t* next; | |
| log_device_t(const char* d, bool b) { | |
| device = d; | |
| binary = b; | |
| next = nullptr; | |
| printed = false; | |
| logger = nullptr; | |
| logger_list = nullptr; | |
| } | |
| }; | |
| struct android_logcat_context_internal { | |
| // status | |
| volatile std::atomic_int retval; // valid if thread_stopped set | |
| // Arguments passed in, or copies and storage thereof if a thread. | |
| int argc; | |
| char* const* argv; | |
| char* const* envp; | |
| std::vector<std::string> args; | |
| std::vector<const char*> argv_hold; | |
| std::vector<std::string> envs; | |
| std::vector<const char*> envp_hold; | |
| int output_fd; // duplication of fileno(output) (below) | |
| int error_fd; // duplication of fileno(error) (below) | |
| // library | |
| int fds[2]; // From popen call | |
| FILE* output; // everything writes to fileno(output), buffer unused | |
| FILE* error; // unless error == output. | |
| pthread_t thr; | |
| volatile std::atomic_bool stop; // quick exit flag | |
| volatile std::atomic_bool thread_stopped; | |
| bool stderr_null; // shell "2>/dev/null" | |
| bool stderr_stdout; // shell "2>&1" | |
| // global variables | |
| AndroidLogFormat* logformat; | |
| const char* outputFileName; | |
| // 0 means "no log rotation" | |
| size_t logRotateSizeKBytes; | |
| // 0 means "unbounded" | |
| size_t maxRotatedLogs; | |
| size_t outByteCount; | |
| int printBinary; | |
| int devCount; // >1 means multiple | |
| pcrecpp::RE* regex; | |
| log_device_t* devices; | |
| EventTagMap* eventTagMap; | |
| // 0 means "infinite" | |
| size_t maxCount; | |
| size_t printCount; | |
| bool printItAnyways; | |
| bool debug; | |
| bool hasOpenedEventTagMap; | |
| }; | |
| // Creates a context associated with this logcat instance | |
| android_logcat_context create_android_logcat() { | |
| android_logcat_context_internal* context; | |
| context = (android_logcat_context_internal*)calloc( | |
| 1, sizeof(android_logcat_context_internal)); | |
| if (!context) return nullptr; | |
| context->fds[0] = -1; | |
| context->fds[1] = -1; | |
| context->output_fd = -1; | |
| context->error_fd = -1; | |
| context->maxRotatedLogs = DEFAULT_MAX_ROTATED_LOGS; | |
| context->argv_hold.clear(); | |
| context->args.clear(); | |
| context->envp_hold.clear(); | |
| context->envs.clear(); | |
| return (android_logcat_context)context; | |
| } | |
| // logd prefixes records with a length field | |
| #define RECORD_LENGTH_FIELD_SIZE_BYTES sizeof(uint32_t) | |
| namespace android { | |
| enum helpType { HELP_FALSE, HELP_TRUE, HELP_FORMAT }; | |
| // if showHelp is set, newline required in fmt statement to transition to usage | |
| static void logcat_panic(android_logcat_context_internal* context, | |
| enum helpType showHelp, const char* fmt, ...) | |
| __printflike(3, 4); | |
| static int openLogFile(const char* pathname) { | |
| return open(pathname, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR); | |
| } | |
| static void close_output(android_logcat_context_internal* context) { | |
| // split output_from_error | |
| if (context->error == context->output) { | |
| context->output = nullptr; | |
| context->output_fd = -1; | |
| } | |
| if (context->error && (context->output_fd == fileno(context->error))) { | |
| context->output_fd = -1; | |
| } | |
| if (context->output_fd == context->error_fd) { | |
| context->output_fd = -1; | |
| } | |
| // close output channel | |
| if (context->output) { | |
| if (context->output != stdout) { | |
| if (context->output_fd == fileno(context->output)) { | |
| context->output_fd = -1; | |
| } | |
| if (context->fds[1] == fileno(context->output)) { | |
| context->fds[1] = -1; | |
| } | |
| fclose(context->output); | |
| } | |
| context->output = nullptr; | |
| } | |
| if (context->output_fd >= 0) { | |
| if (context->output_fd != fileno(stdout)) { | |
| if (context->fds[1] == context->output_fd) { | |
| context->fds[1] = -1; | |
| } | |
| close(context->output_fd); | |
| } | |
| context->output_fd = -1; | |
| } | |
| } | |
| static void close_error(android_logcat_context_internal* context) { | |
| // split error_from_output | |
| if (context->output == context->error) { | |
| context->error = nullptr; | |
| context->error_fd = -1; | |
| } | |
| if (context->output && (context->error_fd == fileno(context->output))) { | |
| context->error_fd = -1; | |
| } | |
| if (context->error_fd == context->output_fd) { | |
| context->error_fd = -1; | |
| } | |
| // close error channel | |
| if (context->error) { | |
| if ((context->error != stderr) && (context->error != stdout)) { | |
| if (context->error_fd == fileno(context->error)) { | |
| context->error_fd = -1; | |
| } | |
| if (context->fds[1] == fileno(context->error)) { | |
| context->fds[1] = -1; | |
| } | |
| fclose(context->error); | |
| } | |
| context->error = nullptr; | |
| } | |
| if (context->error_fd >= 0) { | |
| if ((context->error_fd != fileno(stdout)) && | |
| (context->error_fd != fileno(stderr))) { | |
| if (context->fds[1] == context->error_fd) context->fds[1] = -1; | |
| close(context->error_fd); | |
| } | |
| context->error_fd = -1; | |
| } | |
| } | |
| static void rotateLogs(android_logcat_context_internal* context) { | |
| int err; | |
| // Can't rotate logs if we're not outputting to a file | |
| if (!context->outputFileName) return; | |
| close_output(context); | |
| // Compute the maximum number of digits needed to count up to | |
| // maxRotatedLogs in decimal. eg: | |
| // maxRotatedLogs == 30 | |
| // -> log10(30) == 1.477 | |
| // -> maxRotationCountDigits == 2 | |
| int maxRotationCountDigits = | |
| (context->maxRotatedLogs > 0) | |
| ? (int)(floor(log10(context->maxRotatedLogs) + 1)) | |
| : 0; | |
| for (int i = context->maxRotatedLogs; i > 0; i--) { | |
| std::string file1 = android::base::StringPrintf( | |
| "%s.%.*d", context->outputFileName, maxRotationCountDigits, i); | |
| std::string file0; | |
| if (!(i - 1)) { | |
| file0 = android::base::StringPrintf("%s", context->outputFileName); | |
| } else { | |
| file0 = | |
| android::base::StringPrintf("%s.%.*d", context->outputFileName, | |
| maxRotationCountDigits, i - 1); | |
| } | |
| if (!file0.length() || !file1.length()) { | |
| perror("while rotating log files"); | |
| break; | |
| } | |
| err = rename(file0.c_str(), file1.c_str()); | |
| if (err < 0 && errno != ENOENT) { | |
| perror("while rotating log files"); | |
| } | |
| } | |
| context->output_fd = openLogFile(context->outputFileName); | |
| if (context->output_fd < 0) { | |
| logcat_panic(context, HELP_FALSE, "couldn't open output file"); | |
| return; | |
| } | |
| context->output = fdopen(context->output_fd, "web"); | |
| if (!context->output) { | |
| logcat_panic(context, HELP_FALSE, "couldn't fdopen output file"); | |
| return; | |
| } | |
| if (context->stderr_stdout) { | |
| close_error(context); | |
| context->error = context->output; | |
| context->error_fd = context->output_fd; | |
| } | |
| context->outByteCount = 0; | |
| } | |
| void printBinary(android_logcat_context_internal* context, struct log_msg* buf) { | |
| size_t size = buf->len(); | |
| TEMP_FAILURE_RETRY(write(context->output_fd, buf, size)); | |
| } | |
| static bool regexOk(android_logcat_context_internal* context, | |
| const AndroidLogEntry& entry) { | |
| if (!context->regex) return true; | |
| std::string messageString(entry.message, entry.messageLen); | |
| return context->regex->PartialMatch(messageString); | |
| } | |
| static void processBuffer(android_logcat_context_internal* context, | |
| log_device_t* dev, struct log_msg* buf) { | |
| int bytesWritten = 0; | |
| int err; | |
| AndroidLogEntry entry; | |
| char binaryMsgBuf[1024]; | |
| if (dev->binary) { | |
| if (!context->eventTagMap && !context->hasOpenedEventTagMap) { | |
| context->eventTagMap = android_openEventTagMap(nullptr); | |
| context->hasOpenedEventTagMap = true; | |
| } | |
| err = android_log_processBinaryLogBuffer( | |
| &buf->entry_v1, &entry, context->eventTagMap, binaryMsgBuf, | |
| sizeof(binaryMsgBuf)); | |
| // printf(">>> pri=%d len=%d msg='%s'\n", | |
| // entry.priority, entry.messageLen, entry.message); | |
| } else { | |
| err = android_log_processLogBuffer(&buf->entry_v1, &entry); | |
| } | |
| if ((err < 0) && !context->debug) return; | |
| if (android_log_shouldPrintLine( | |
| context->logformat, std::string(entry.tag, entry.tagLen).c_str(), | |
| entry.priority)) { | |
| bool match = regexOk(context, entry); | |
| context->printCount += match; | |
| if (match || context->printItAnyways) { | |
| bytesWritten = android_log_printLogLine(context->logformat, | |
| context->output_fd, &entry); | |
| if (bytesWritten < 0) { | |
| logcat_panic(context, HELP_FALSE, "output error"); | |
| return; | |
| } | |
| } | |
| } | |
| context->outByteCount += bytesWritten; | |
| if (context->logRotateSizeKBytes > 0 && | |
| (context->outByteCount / 1024) >= context->logRotateSizeKBytes) { | |
| rotateLogs(context); | |
| } | |
| } | |
| static void maybePrintStart(android_logcat_context_internal* context, | |
| log_device_t* dev, bool printDividers) { | |
| if (!dev->printed || printDividers) { | |
| if (context->devCount > 1 && !context->printBinary) { | |
| char buf[1024]; | |
| snprintf(buf, sizeof(buf), "--------- %s %s\n", | |
| dev->printed ? "switch to" : "beginning of", dev->device); | |
| if (write(context->output_fd, buf, strlen(buf)) < 0) { | |
| logcat_panic(context, HELP_FALSE, "output error"); | |
| return; | |
| } | |
| } | |
| dev->printed = true; | |
| } | |
| } | |
| static void setupOutputAndSchedulingPolicy( | |
| android_logcat_context_internal* context, bool blocking) { | |
| if (!context->outputFileName) return; | |
| if (blocking) { | |
| // Lower priority and set to batch scheduling if we are saving | |
| // the logs into files and taking continuous content. | |
| if ((set_sched_policy(0, SP_BACKGROUND) < 0) && context->error) { | |
| fprintf(context->error, | |
| "failed to set background scheduling policy\n"); | |
| } | |
| struct sched_param param; | |
| memset(¶m, 0, sizeof(param)); | |
| if (sched_setscheduler((pid_t)0, SCHED_BATCH, ¶m) < 0) { | |
| fprintf(stderr, "failed to set to batch scheduler\n"); | |
| } | |
| if ((setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) && | |
| context->error) { | |
| fprintf(context->error, "failed set to priority\n"); | |
| } | |
| } | |
| close_output(context); | |
| context->output_fd = openLogFile(context->outputFileName); | |
| if (context->output_fd < 0) { | |
| logcat_panic(context, HELP_FALSE, "couldn't open output file"); | |
| return; | |
| } | |
| struct stat statbuf; | |
| if (fstat(context->output_fd, &statbuf) == -1) { | |
| close_output(context); | |
| logcat_panic(context, HELP_FALSE, "couldn't get output file stat\n"); | |
| return; | |
| } | |
| if ((size_t)statbuf.st_size > SIZE_MAX || statbuf.st_size < 0) { | |
| close_output(context); | |
| logcat_panic(context, HELP_FALSE, "invalid output file stat\n"); | |
| return; | |
| } | |
| context->output = fdopen(context->output_fd, "web"); | |
| context->outByteCount = statbuf.st_size; | |
| } | |
| // clang-format off | |
| static void show_help(android_logcat_context_internal* context) { | |
| if (!context->error) return; | |
| const char* cmd = strrchr(context->argv[0], '/'); | |
| cmd = cmd ? cmd + 1 : context->argv[0]; | |
| fprintf(context->error, "Usage: %s [options] [filterspecs]\n", cmd); | |
| fprintf(context->error, "options include:\n" | |
| " -s Set default filter to silent. Equivalent to filterspec '*:S'\n" | |
| " -f <file>, --file=<file> Log to file. Default is stdout\n" | |
| " -r <kbytes>, --rotate-kbytes=<kbytes>\n" | |
| " Rotate log every kbytes. Requires -f option\n" | |
| " -n <count>, --rotate-count=<count>\n" | |
| " Sets max number of rotated logs to <count>, default 4\n" | |
| " --id=<id> If the signature id for logging to file changes, then clear\n" | |
| " the fileset and continue\n" | |
| " -v <format>, --format=<format>\n" | |
| " Sets log print format verb and adverbs, where <format> is:\n" | |
| " brief help long process raw tag thread threadtime time\n" | |
| " and individually flagged modifying adverbs can be added:\n" | |
| " color descriptive epoch monotonic printable uid\n" | |
| " usec UTC year zone\n" | |
| " Multiple -v parameters or comma separated list of format and\n" | |
| " format modifiers are allowed.\n" | |
| // private and undocumented nsec, no signal, too much noise | |
| // useful for -T or -t <timestamp> accurate testing though. | |
| " -D, --dividers Print dividers between each log buffer\n" | |
| " -c, --clear Clear (flush) the entire log and exit\n" | |
| " if Log to File specified, clear fileset instead\n" | |
| " -d Dump the log and then exit (don't block)\n" | |
| " -e <expr>, --regex=<expr>\n" | |
| " Only print lines where the log message matches <expr>\n" | |
| " where <expr> is a Perl-compatible regular expression\n" | |
| // Leave --head undocumented as alias for -m | |
| " -m <count>, --max-count=<count>\n" | |
| " Quit after printing <count> lines. This is meant to be\n" | |
| " paired with --regex, but will work on its own.\n" | |
| " --print Paired with --regex and --max-count to let content bypass\n" | |
| " regex filter but still stop at number of matches.\n" | |
| // Leave --tail undocumented as alias for -t | |
| " -t <count> Print only the most recent <count> lines (implies -d)\n" | |
| " -t '<time>' Print most recent lines since specified time (implies -d)\n" | |
| " -T <count> Print only the most recent <count> lines (does not imply -d)\n" | |
| " -T '<time>' Print most recent lines since specified time (not imply -d)\n" | |
| " count is pure numerical, time is 'MM-DD hh:mm:ss.mmm...'\n" | |
| " 'YYYY-MM-DD hh:mm:ss.mmm...' or 'sssss.mmm...' format\n" | |
| " -g, --buffer-size Get the size of the ring buffer.\n" | |
| " -G <size>, --buffer-size=<size>\n" | |
| " Set size of log ring buffer, may suffix with K or M.\n" | |
| " -L, --last Dump logs from prior to last reboot\n" | |
| " -b <buffer>, --buffer=<buffer> Request alternate ring buffer, 'main',\n" | |
| " 'system', 'radio', 'events', 'crash', 'default' or 'all'.\n" | |
| " Additionally, 'kernel' for userdebug and eng builds, and\n" | |
| " 'security' for Device Owner installations.\n" | |
| " Multiple -b parameters or comma separated list of buffers are\n" | |
| " allowed. Buffers interleaved. Default -b main,system,crash.\n" | |
| " -B, --binary Output the log in binary.\n" | |
| " -S, --statistics Output statistics.\n" | |
| " -p, --prune Print prune white and ~black list. Service is specified as\n" | |
| " UID, UID/PID or /PID. Weighed for quicker pruning if prefix\n" | |
| " with ~, otherwise weighed for longevity if unadorned. All\n" | |
| " other pruning activity is oldest first. Special case ~!\n" | |
| " represents an automatic quicker pruning for the noisiest\n" | |
| " UID as determined by the current statistics.\n" | |
| " -P '<list> ...', --prune='<list> ...'\n" | |
| " Set prune white and ~black list, using same format as\n" | |
| " listed above. Must be quoted.\n" | |
| " --pid=<pid> Only prints logs from the given pid.\n" | |
| // Check ANDROID_LOG_WRAP_DEFAULT_TIMEOUT value for match to 2 hours | |
| " --wrap Sleep for 2 hours or when buffer about to wrap whichever\n" | |
| " comes first. Improves efficiency of polling by providing\n" | |
| " an about-to-wrap wakeup.\n"); | |
| fprintf(context->error, "\nfilterspecs are a series of \n" | |
| " <tag>[:priority]\n\n" | |
| "where <tag> is a log component tag (or * for all) and priority is:\n" | |
| " V Verbose (default for <tag>)\n" | |
| " D Debug (default for '*')\n" | |
| " I Info\n" | |
| " W Warn\n" | |
| " E Error\n" | |
| " F Fatal\n" | |
| " S Silent (suppress all output)\n" | |
| "\n'*' by itself means '*:D' and <tag> by itself means <tag>:V.\n" | |
| "If no '*' filterspec or -s on command line, all filter defaults to '*:V'.\n" | |
| "eg: '*:S <tag>' prints only <tag>, '<tag>:S' suppresses all <tag> log messages.\n" | |
| "\nIf not specified on the command line, filterspec is set from ANDROID_LOG_TAGS.\n" | |
| "\nIf not specified with -v on command line, format is set from ANDROID_PRINTF_LOG\n" | |
| "or defaults to \"threadtime\"\n\n"); | |
| } | |
| static void show_format_help(android_logcat_context_internal* context) { | |
| if (!context->error) return; | |
| fprintf(context->error, | |
| "-v <format>, --format=<format> options:\n" | |
| " Sets log print format verb and adverbs, where <format> is:\n" | |
| " brief long process raw tag thread threadtime time\n" | |
| " and individually flagged modifying adverbs can be added:\n" | |
| " color descriptive epoch monotonic printable uid usec UTC year zone\n" | |
| "\nSingle format verbs:\n" | |
| " brief — Display priority/tag and PID of the process issuing the message.\n" | |
| " long — Display all metadata fields, separate messages with blank lines.\n" | |
| " process — Display PID only.\n" | |
| " raw — Display the raw log message, with no other metadata fields.\n" | |
| " tag — Display the priority/tag only.\n" | |
| " thread — Display priority, PID and TID of process issuing the message.\n" | |
| " threadtime — Display the date, invocation time, priority, tag, and the PID\n" | |
| " and TID of the thread issuing the message. (the default format).\n" | |
| " time — Display the date, invocation time, priority/tag, and PID of the\n" | |
| " process issuing the message.\n" | |
| "\nAdverb modifiers can be used in combination:\n" | |
| " color — Display in highlighted color to match priority. i.e. \x1B[38;5;231mVERBOSE\n" | |
| " \x1B[38;5;75mDEBUG \x1B[38;5;40mINFO \x1B[38;5;166mWARNING \x1B[38;5;196mERROR FATAL\x1B[0m\n" | |
| " descriptive — events logs only, descriptions from event-log-tags database.\n" | |
| " epoch — Display time as seconds since Jan 1 1970.\n" | |
| " monotonic — Display time as cpu seconds since last boot.\n" | |
| " printable — Ensure that any binary logging content is escaped.\n" | |
| " uid — If permitted, display the UID or Android ID of logged process.\n" | |
| " usec — Display time down the microsecond precision.\n" | |
| " UTC — Display time as UTC.\n" | |
| " year — Add the year to the displayed time.\n" | |
| " zone — Add the local timezone to the displayed time.\n" | |
| " \"<zone>\" — Print using this public named timezone (experimental).\n\n" | |
| ); | |
| } | |
| // clang-format on | |
| static int setLogFormat(android_logcat_context_internal* context, | |
| const char* formatString) { | |
| AndroidLogPrintFormat format; | |
| format = android_log_formatFromString(formatString); | |
| // invalid string? | |
| if (format == FORMAT_OFF) return -1; | |
| return android_log_setPrintFormat(context->logformat, format); | |
| } | |
| static std::pair<unsigned long, const char*> format_of_size(unsigned long value) { | |
| static const char multipliers[][3] = {{""}, {"Ki"}, {"Mi"}, {"Gi"}}; | |
| size_t i; | |
| for (i = 0; | |
| (i < sizeof(multipliers) / sizeof(multipliers[0])) && (value >= 1024); | |
| value /= 1024, ++i) | |
| ; | |
| return std::make_pair(value, multipliers[i]); | |
| } | |
| // String to unsigned int, returns -1 if it fails | |
| static bool getSizeTArg(const char* ptr, size_t* val, size_t min = 0, | |
| size_t max = SIZE_MAX) { | |
| if (!ptr) return false; | |
| char* endp; | |
| errno = 0; | |
| size_t ret = (size_t)strtoll(ptr, &endp, 0); | |
| if (endp[0] || errno) return false; | |
| if ((ret > max) || (ret < min)) return false; | |
| *val = ret; | |
| return true; | |
| } | |
| static void logcat_panic(android_logcat_context_internal* context, | |
| enum helpType showHelp, const char* fmt, ...) { | |
| context->retval = EXIT_FAILURE; | |
| if (!context->error) { | |
| context->stop = true; | |
| return; | |
| } | |
| va_list args; | |
| va_start(args, fmt); | |
| vfprintf(context->error, fmt, args); | |
| va_end(args); | |
| switch (showHelp) { | |
| case HELP_TRUE: | |
| show_help(context); | |
| break; | |
| case HELP_FORMAT: | |
| show_format_help(context); | |
| break; | |
| case HELP_FALSE: | |
| default: | |
| break; | |
| } | |
| context->stop = true; | |
| } | |
| static char* parseTime(log_time& t, const char* cp) { | |
| char* ep = t.strptime(cp, "%m-%d %H:%M:%S.%q"); | |
| if (ep) return ep; | |
| ep = t.strptime(cp, "%Y-%m-%d %H:%M:%S.%q"); | |
| if (ep) return ep; | |
| return t.strptime(cp, "%s.%q"); | |
| } | |
| // Find last logged line in <outputFileName>, or <outputFileName>.1 | |
| static log_time lastLogTime(const char* outputFileName) { | |
| log_time retval(log_time::EPOCH); | |
| if (!outputFileName) return retval; | |
| std::string directory; | |
| const char* file = strrchr(outputFileName, '/'); | |
| if (!file) { | |
| directory = "."; | |
| file = outputFileName; | |
| } else { | |
| directory = std::string(outputFileName, file - outputFileName); | |
| ++file; | |
| } | |
| std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(directory.c_str()), | |
| closedir); | |
| if (!dir.get()) return retval; | |
| log_time now(android_log_clockid()); | |
| size_t len = strlen(file); | |
| log_time modulo(0, NS_PER_SEC); | |
| struct dirent* dp; | |
| while (!!(dp = readdir(dir.get()))) { | |
| if ((dp->d_type != DT_REG) || !!strncmp(dp->d_name, file, len) || | |
| (dp->d_name[len] && ((dp->d_name[len] != '.') || | |
| (strtoll(dp->d_name + 1, nullptr, 10) != 1)))) { | |
| continue; | |
| } | |
| std::string file_name = directory; | |
| file_name += "/"; | |
| file_name += dp->d_name; | |
| std::string file; | |
| if (!android::base::ReadFileToString(file_name, &file)) continue; | |
| bool found = false; | |
| for (const auto& line : android::base::Split(file, "\n")) { | |
| log_time t(log_time::EPOCH); | |
| char* ep = parseTime(t, line.c_str()); | |
| if (!ep || (*ep != ' ')) continue; | |
| // determine the time precision of the logs (eg: msec or usec) | |
| for (unsigned long mod = 1UL; mod < modulo.tv_nsec; mod *= 10) { | |
| if (t.tv_nsec % (mod * 10)) { | |
| modulo.tv_nsec = mod; | |
| break; | |
| } | |
| } | |
| // We filter any times later than current as we may not have the | |
| // year stored with each log entry. Also, since it is possible for | |
| // entries to be recorded out of order (very rare) we select the | |
| // maximum we find just in case. | |
| if ((t < now) && (t > retval)) { | |
| retval = t; | |
| found = true; | |
| } | |
| } | |
| // We count on the basename file to be the definitive end, so stop here. | |
| if (!dp->d_name[len] && found) break; | |
| } | |
| if (retval == log_time::EPOCH) return retval; | |
| // tail_time prints matching or higher, round up by the modulo to prevent | |
| // a replay of the last entry we have just checked. | |
| retval += modulo; | |
| return retval; | |
| } | |
| const char* getenv(android_logcat_context_internal* context, const char* name) { | |
| if (!context->envp || !name || !*name) return nullptr; | |
| for (size_t len = strlen(name), i = 0; context->envp[i]; ++i) { | |
| if (strncmp(context->envp[i], name, len)) continue; | |
| if (context->envp[i][len] == '=') return &context->envp[i][len + 1]; | |
| } | |
| return nullptr; | |
| } | |
| } // namespace android | |
| void reportErrorName(const char** current, const char* name, | |
| bool blockSecurity) { | |
| if (*current) return; | |
| if (!blockSecurity || (android_name_to_log_id(name) != LOG_ID_SECURITY)) { | |
| *current = name; | |
| } | |
| } | |
| static int __logcat(android_logcat_context_internal* context) { | |
| using namespace android; | |
| int err; | |
| bool hasSetLogFormat = false; | |
| bool clearLog = false; | |
| bool allSelected = false; | |
| bool getLogSize = false; | |
| bool getPruneList = false; | |
| bool printStatistics = false; | |
| bool printDividers = false; | |
| unsigned long setLogSize = 0; | |
| const char* setPruneList = nullptr; | |
| const char* setId = nullptr; | |
| int mode = ANDROID_LOG_RDONLY; | |
| std::string forceFilters; | |
| log_device_t* dev; | |
| struct logger_list* logger_list; | |
| size_t tail_lines = 0; | |
| log_time tail_time(log_time::EPOCH); | |
| size_t pid = 0; | |
| bool got_t = false; | |
| // object instantiations before goto's can happen | |
| log_device_t unexpected("unexpected", false); | |
| const char* openDeviceFail = nullptr; | |
| const char* clearFail = nullptr; | |
| const char* setSizeFail = nullptr; | |
| const char* getSizeFail = nullptr; | |
| int argc = context->argc; | |
| char* const* argv = context->argv; | |
| context->output = stdout; | |
| context->error = stderr; | |
| for (int i = 0; i < argc; ++i) { | |
| // Simulate shell stderr redirect parsing | |
| if ((argv[i][0] != '2') || (argv[i][1] != '>')) continue; | |
| // Append to file not implemented, just open file | |
| size_t skip = (argv[i][2] == '>') + 2; | |
| if (!strcmp(&argv[i][skip], "/dev/null")) { | |
| context->stderr_null = true; | |
| } else if (!strcmp(&argv[i][skip], "&1")) { | |
| context->stderr_stdout = true; | |
| } else { | |
| // stderr file redirections are not supported | |
| fprintf(context->stderr_stdout ? stdout : stderr, | |
| "stderr redirection to file %s unsupported, skipping\n", | |
| &argv[i][skip]); | |
| } | |
| // Only the first one | |
| break; | |
| } | |
| const char* filename = nullptr; | |
| for (int i = 0; i < argc; ++i) { | |
| // Simulate shell stdout redirect parsing | |
| if (argv[i][0] != '>') continue; | |
| // Append to file not implemented, just open file | |
| filename = &argv[i][(argv[i][1] == '>') + 1]; | |
| // Only the first one | |
| break; | |
| } | |
| // Deal with setting up file descriptors and FILE pointers | |
| if (context->error_fd >= 0) { // Is an error file descriptor supplied? | |
| if (context->error_fd == context->output_fd) { | |
| context->stderr_stdout = true; | |
| } else if (context->stderr_null) { // redirection told us to close it | |
| close(context->error_fd); | |
| context->error_fd = -1; | |
| } else { // All Ok, convert error to a FILE pointer | |
| context->error = fdopen(context->error_fd, "web"); | |
| if (!context->error) { | |
| context->retval = -errno; | |
| fprintf(context->stderr_stdout ? stdout : stderr, | |
| "Failed to fdopen(error_fd=%d) %s\n", context->error_fd, | |
| strerror(errno)); | |
| goto exit; | |
| } | |
| } | |
| } | |
| if (context->output_fd >= 0) { // Is an output file descriptor supplied? | |
| if (filename) { // redirect to file, close supplied file descriptor. | |
| close(context->output_fd); | |
| context->output_fd = -1; | |
| } else { // All Ok, convert output to a FILE pointer | |
| context->output = fdopen(context->output_fd, "web"); | |
| if (!context->output) { | |
| context->retval = -errno; | |
| fprintf(context->stderr_stdout ? stdout : context->error, | |
| "Failed to fdopen(output_fd=%d) %s\n", | |
| context->output_fd, strerror(errno)); | |
| goto exit; | |
| } | |
| } | |
| } | |
| if (filename) { // We supplied an output file redirected in command line | |
| context->output = fopen(filename, "web"); | |
| } | |
| // Deal with 2>&1 | |
| if (context->stderr_stdout) context->error = context->output; | |
| // Deal with 2>/dev/null | |
| if (context->stderr_null) { | |
| context->error_fd = -1; | |
| context->error = nullptr; | |
| } | |
| // Only happens if output=stdout or output=filename | |
| if ((context->output_fd < 0) && context->output) { | |
| context->output_fd = fileno(context->output); | |
| } | |
| // Only happens if error=stdout || error=stderr | |
| if ((context->error_fd < 0) && context->error) { | |
| context->error_fd = fileno(context->error); | |
| } | |
| context->logformat = android_log_format_new(); | |
| if (argc == 2 && !strcmp(argv[1], "--help")) { | |
| show_help(context); | |
| context->retval = EXIT_SUCCESS; | |
| goto exit; | |
| } | |
| // meant to catch comma-delimited values, but cast a wider | |
| // net for stability dealing with possible mistaken inputs. | |
| static const char delimiters[] = ",:; \t\n\r\f"; | |
| optind = 0; | |
| while (true) { | |
| int option_index = 0; | |
| // list of long-argument only strings for later comparison | |
| static const char pid_str[] = "pid"; | |
| static const char debug_str[] = "debug"; | |
| static const char id_str[] = "id"; | |
| static const char wrap_str[] = "wrap"; | |
| static const char print_str[] = "print"; | |
| // clang-format off | |
| static const struct option long_options[] = { | |
| { "binary", no_argument, nullptr, 'B' }, | |
| { "buffer", required_argument, nullptr, 'b' }, | |
| { "buffer-size", optional_argument, nullptr, 'g' }, | |
| { "clear", no_argument, nullptr, 'c' }, | |
| { debug_str, no_argument, nullptr, 0 }, | |
| { "dividers", no_argument, nullptr, 'D' }, | |
| { "file", required_argument, nullptr, 'f' }, | |
| { "format", required_argument, nullptr, 'v' }, | |
| // hidden and undocumented reserved alias for --regex | |
| { "grep", required_argument, nullptr, 'e' }, | |
| // hidden and undocumented reserved alias for --max-count | |
| { "head", required_argument, nullptr, 'm' }, | |
| { "help", no_argument, nullptr, 'h' }, | |
| { id_str, required_argument, nullptr, 0 }, | |
| { "last", no_argument, nullptr, 'L' }, | |
| { "max-count", required_argument, nullptr, 'm' }, | |
| { pid_str, required_argument, nullptr, 0 }, | |
| { print_str, no_argument, nullptr, 0 }, | |
| { "prune", optional_argument, nullptr, 'p' }, | |
| { "regex", required_argument, nullptr, 'e' }, | |
| { "rotate-count", required_argument, nullptr, 'n' }, | |
| { "rotate-kbytes", required_argument, nullptr, 'r' }, | |
| { "statistics", no_argument, nullptr, 'S' }, | |
| // hidden and undocumented reserved alias for -t | |
| { "tail", required_argument, nullptr, 't' }, | |
| // support, but ignore and do not document, the optional argument | |
| { wrap_str, optional_argument, nullptr, 0 }, | |
| { nullptr, 0, nullptr, 0 } | |
| }; | |
| // clang-format on | |
| int c = getopt_long(argc, argv, ":cdDhLt:T:gG:sQf:r:n:v:b:BSpP:m:e:", long_options, | |
| &option_index); | |
| if (c == -1) break; | |
| switch (c) { | |
| case 0: | |
| // only long options | |
| if (long_options[option_index].name == pid_str) { | |
| // ToDo: determine runtime PID_MAX? | |
| if (!getSizeTArg(optarg, &pid, 1)) { | |
| logcat_panic(context, HELP_TRUE, "%s %s out of range\n", | |
| long_options[option_index].name, optarg); | |
| goto exit; | |
| } | |
| break; | |
| } | |
| if (long_options[option_index].name == wrap_str) { | |
| mode |= ANDROID_LOG_WRAP | ANDROID_LOG_RDONLY | | |
| ANDROID_LOG_NONBLOCK; | |
| // ToDo: implement API that supports setting a wrap timeout | |
| size_t dummy = ANDROID_LOG_WRAP_DEFAULT_TIMEOUT; | |
| if (optarg && !getSizeTArg(optarg, &dummy, 1)) { | |
| logcat_panic(context, HELP_TRUE, "%s %s out of range\n", | |
| long_options[option_index].name, optarg); | |
| goto exit; | |
| } | |
| if ((dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) && | |
| context->error) { | |
| fprintf(context->error, | |
| "WARNING: %s %u seconds, ignoring %zu\n", | |
| long_options[option_index].name, | |
| ANDROID_LOG_WRAP_DEFAULT_TIMEOUT, dummy); | |
| } | |
| break; | |
| } | |
| if (long_options[option_index].name == print_str) { | |
| context->printItAnyways = true; | |
| break; | |
| } | |
| if (long_options[option_index].name == debug_str) { | |
| context->debug = true; | |
| break; | |
| } | |
| if (long_options[option_index].name == id_str) { | |
| setId = (optarg && optarg[0]) ? optarg : nullptr; | |
| } | |
| break; | |
| case 's': | |
| // default to all silent | |
| android_log_addFilterRule(context->logformat, "*:s"); | |
| break; | |
| case 'c': | |
| clearLog = true; | |
| mode |= ANDROID_LOG_WRONLY; | |
| break; | |
| case 'L': | |
| mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_PSTORE | | |
| ANDROID_LOG_NONBLOCK; | |
| break; | |
| case 'd': | |
| mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK; | |
| break; | |
| case 't': | |
| got_t = true; | |
| mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK; | |
| FALLTHROUGH_INTENDED; | |
| case 'T': | |
| if (strspn(optarg, "0123456789") != strlen(optarg)) { | |
| char* cp = parseTime(tail_time, optarg); | |
| if (!cp) { | |
| logcat_panic(context, HELP_FALSE, "-%c \"%s\" not in time format\n", c, | |
| optarg); | |
| goto exit; | |
| } | |
| if (*cp) { | |
| char ch = *cp; | |
| *cp = '\0'; | |
| if (context->error) { | |
| fprintf(context->error, "WARNING: -%c \"%s\"\"%c%s\" time truncated\n", | |
| c, optarg, ch, cp + 1); | |
| } | |
| *cp = ch; | |
| } | |
| } else { | |
| if (!getSizeTArg(optarg, &tail_lines, 1)) { | |
| if (context->error) { | |
| fprintf(context->error, "WARNING: -%c %s invalid, setting to 1\n", c, | |
| optarg); | |
| } | |
| tail_lines = 1; | |
| } | |
| } | |
| break; | |
| case 'D': | |
| printDividers = true; | |
| break; | |
| case 'e': | |
| context->regex = new pcrecpp::RE(optarg); | |
| break; | |
| case 'm': { | |
| if (!getSizeTArg(optarg, &context->maxCount)) { | |
| logcat_panic(context, HELP_FALSE, | |
| "-%c \"%s\" isn't an integer greater than zero\n", c, optarg); | |
| goto exit; | |
| } | |
| } break; | |
| case 'g': | |
| if (!optarg) { | |
| getLogSize = true; | |
| break; | |
| } | |
| FALLTHROUGH_INTENDED; | |
| case 'G': { | |
| char* cp; | |
| if (strtoll(optarg, &cp, 0) > 0) { | |
| setLogSize = strtoll(optarg, &cp, 0); | |
| } else { | |
| setLogSize = 0; | |
| } | |
| switch (*cp) { | |
| case 'g': | |
| case 'G': | |
| setLogSize *= 1024; | |
| FALLTHROUGH_INTENDED; | |
| case 'm': | |
| case 'M': | |
| setLogSize *= 1024; | |
| FALLTHROUGH_INTENDED; | |
| case 'k': | |
| case 'K': | |
| setLogSize *= 1024; | |
| FALLTHROUGH_INTENDED; | |
| case '\0': | |
| break; | |
| default: | |
| setLogSize = 0; | |
| } | |
| if (!setLogSize) { | |
| logcat_panic(context, HELP_FALSE, | |
| "ERROR: -G <num><multiplier>\n"); | |
| goto exit; | |
| } | |
| } break; | |
| case 'p': | |
| if (!optarg) { | |
| getPruneList = true; | |
| break; | |
| } | |
| FALLTHROUGH_INTENDED; | |
| case 'P': | |
| setPruneList = optarg; | |
| break; | |
| case 'b': { | |
| std::unique_ptr<char, void (*)(void*)> buffers(strdup(optarg), free); | |
| char* arg = buffers.get(); | |
| unsigned idMask = 0; | |
| char* sv = nullptr; // protect against -ENOMEM above | |
| while (!!(arg = strtok_r(arg, delimiters, &sv))) { | |
| if (!strcmp(arg, "default")) { | |
| idMask |= (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) | | |
| (1 << LOG_ID_CRASH); | |
| } else if (!strcmp(arg, "all")) { | |
| allSelected = true; | |
| idMask = (unsigned)-1; | |
| } else { | |
| log_id_t log_id = android_name_to_log_id(arg); | |
| const char* name = android_log_id_to_name(log_id); | |
| if (!!strcmp(name, arg)) { | |
| logcat_panic(context, HELP_TRUE, | |
| "unknown buffer %s\n", arg); | |
| goto exit; | |
| } | |
| if (log_id == LOG_ID_SECURITY) allSelected = false; | |
| idMask |= (1 << log_id); | |
| } | |
| arg = nullptr; | |
| } | |
| for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) { | |
| const char* name = android_log_id_to_name((log_id_t)i); | |
| log_id_t log_id = android_name_to_log_id(name); | |
| if (log_id != (log_id_t)i) continue; | |
| if (!(idMask & (1 << i))) continue; | |
| bool found = false; | |
| for (dev = context->devices; dev; dev = dev->next) { | |
| if (!strcmp(name, dev->device)) { | |
| found = true; | |
| break; | |
| } | |
| if (!dev->next) break; | |
| } | |
| if (found) continue; | |
| bool binary = !strcmp(name, "events") || | |
| !strcmp(name, "security") || | |
| !strcmp(name, "stats"); | |
| log_device_t* d = new log_device_t(name, binary); | |
| if (dev) { | |
| dev->next = d; | |
| dev = d; | |
| } else { | |
| context->devices = dev = d; | |
| } | |
| context->devCount++; | |
| } | |
| } break; | |
| case 'B': | |
| context->printBinary = 1; | |
| break; | |
| case 'f': | |
| if ((tail_time == log_time::EPOCH) && !tail_lines) { | |
| tail_time = lastLogTime(optarg); | |
| } | |
| // redirect output to a file | |
| context->outputFileName = optarg; | |
| break; | |
| case 'r': | |
| if (!getSizeTArg(optarg, &context->logRotateSizeKBytes, 1)) { | |
| logcat_panic(context, HELP_TRUE, "Invalid parameter \"%s\" to -r\n", optarg); | |
| goto exit; | |
| } | |
| break; | |
| case 'n': | |
| if (!getSizeTArg(optarg, &context->maxRotatedLogs, 1)) { | |
| logcat_panic(context, HELP_TRUE, "Invalid parameter \"%s\" to -n\n", optarg); | |
| goto exit; | |
| } | |
| break; | |
| case 'v': { | |
| if (!strcmp(optarg, "help") || !strcmp(optarg, "--help")) { | |
| show_format_help(context); | |
| context->retval = EXIT_SUCCESS; | |
| goto exit; | |
| } | |
| std::unique_ptr<char, void (*)(void*)> formats(strdup(optarg), free); | |
| char* arg = formats.get(); | |
| char* sv = nullptr; // protect against -ENOMEM above | |
| while (!!(arg = strtok_r(arg, delimiters, &sv))) { | |
| err = setLogFormat(context, arg); | |
| if (err < 0) { | |
| logcat_panic(context, HELP_FORMAT, | |
| "Invalid parameter \"%s\" to -v\n", arg); | |
| goto exit; | |
| } | |
| arg = nullptr; | |
| if (err) hasSetLogFormat = true; | |
| } | |
| } break; | |
| case 'Q': | |
| #define LOGCAT_FILTER "androidboot.logcat=" | |
| #define CONSOLE_PIPE_OPTION "androidboot.consolepipe=" | |
| #define CONSOLE_OPTION "androidboot.console=" | |
| #define QEMU_PROPERTY "ro.kernel.qemu" | |
| #define QEMU_CMDLINE "qemu.cmdline" | |
| // This is a *hidden* option used to start a version of logcat | |
| // in an emulated device only. It basically looks for | |
| // androidboot.logcat= on the kernel command line. If | |
| // something is found, it extracts a log filter and uses it to | |
| // run the program. The logcat output will go to consolepipe if | |
| // androiboot.consolepipe (e.g. qemu_pipe) is given, otherwise, | |
| // it goes to androidboot.console (e.g. tty) | |
| { | |
| // if not in emulator, exit quietly | |
| if (false == android::base::GetBoolProperty(QEMU_PROPERTY, false)) { | |
| context->retval = EXIT_SUCCESS; | |
| goto exit; | |
| } | |
| std::string cmdline = android::base::GetProperty(QEMU_CMDLINE, ""); | |
| if (cmdline.empty()) { | |
| android::base::ReadFileToString("/proc/cmdline", &cmdline); | |
| } | |
| const char* logcatFilter = strstr(cmdline.c_str(), LOGCAT_FILTER); | |
| // if nothing found or invalid filters, exit quietly | |
| if (!logcatFilter) { | |
| context->retval = EXIT_SUCCESS; | |
| goto exit; | |
| } | |
| const char* p = logcatFilter + strlen(LOGCAT_FILTER); | |
| const char* q = strpbrk(p, " \t\n\r"); | |
| if (!q) q = p + strlen(p); | |
| forceFilters = std::string(p, q); | |
| // redirect our output to the emulator console pipe or console | |
| const char* consolePipe = | |
| strstr(cmdline.c_str(), CONSOLE_PIPE_OPTION); | |
| const char* console = | |
| strstr(cmdline.c_str(), CONSOLE_OPTION); | |
| if (consolePipe) { | |
| p = consolePipe + strlen(CONSOLE_PIPE_OPTION); | |
| } else if (console) { | |
| p = console + strlen(CONSOLE_OPTION); | |
| } else { | |
| context->retval = EXIT_FAILURE; | |
| goto exit; | |
| } | |
| q = strpbrk(p, " \t\n\r"); | |
| int len = q ? q - p : strlen(p); | |
| std::string devname = "/dev/" + std::string(p, len); | |
| std::string pipePurpose("pipe:logcat"); | |
| if (consolePipe) { | |
| // example: "qemu_pipe,pipe:logcat" | |
| // upon opening of /dev/qemu_pipe, the "pipe:logcat" | |
| // string with trailing '\0' should be written to the fd | |
| size_t pos = devname.find(','); | |
| if (pos != std::string::npos) { | |
| pipePurpose = devname.substr(pos + 1); | |
| devname = devname.substr(0, pos); | |
| } | |
| } | |
| cmdline.erase(); | |
| if (context->error) { | |
| fprintf(context->error, "logcat using %s\n", | |
| devname.c_str()); | |
| } | |
| FILE* fp = fopen(devname.c_str(), "web"); | |
| devname.erase(); | |
| if (!fp) break; | |
| if (consolePipe) { | |
| // need the trailing '\0' | |
| if(!android::base::WriteFully(fileno(fp), pipePurpose.c_str(), | |
| pipePurpose.size() + 1)) { | |
| fclose(fp); | |
| context->retval = EXIT_FAILURE; | |
| goto exit; | |
| } | |
| } | |
| // close output and error channels, replace with console | |
| android::close_output(context); | |
| android::close_error(context); | |
| context->stderr_stdout = true; | |
| context->output = fp; | |
| context->output_fd = fileno(fp); | |
| if (context->stderr_null) break; | |
| context->stderr_stdout = true; | |
| context->error = fp; | |
| context->error_fd = fileno(fp); | |
| } | |
| break; | |
| case 'S': | |
| printStatistics = true; | |
| break; | |
| case ':': | |
| logcat_panic(context, HELP_TRUE, "Option -%c needs an argument\n", optopt); | |
| goto exit; | |
| case 'h': | |
| show_help(context); | |
| show_format_help(context); | |
| goto exit; | |
| default: | |
| logcat_panic(context, HELP_TRUE, "Unrecognized Option %c\n", optopt); | |
| goto exit; | |
| } | |
| } | |
| if (context->maxCount && got_t) { | |
| logcat_panic(context, HELP_TRUE, | |
| "Cannot use -m (--max-count) and -t together\n"); | |
| goto exit; | |
| } | |
| if (context->printItAnyways && (!context->regex || !context->maxCount)) { | |
| // One day it would be nice if --print -v color and --regex <expr> | |
| // could play with each other and show regex highlighted content. | |
| // clang-format off | |
| if (context->error) { | |
| fprintf(context->error, "WARNING: " | |
| "--print ignored, to be used in combination with\n" | |
| " " | |
| "--regex <expr> and --max-count <N>\n"); | |
| } | |
| context->printItAnyways = false; | |
| } | |
| if (!context->devices) { | |
| dev = context->devices = new log_device_t("main", false); | |
| context->devCount = 1; | |
| if (android_name_to_log_id("system") == LOG_ID_SYSTEM) { | |
| dev = dev->next = new log_device_t("system", false); | |
| context->devCount++; | |
| } | |
| if (android_name_to_log_id("crash") == LOG_ID_CRASH) { | |
| dev = dev->next = new log_device_t("crash", false); | |
| context->devCount++; | |
| } | |
| } | |
| if (!!context->logRotateSizeKBytes && !context->outputFileName) { | |
| logcat_panic(context, HELP_TRUE, "-r requires -f as well\n"); | |
| goto exit; | |
| } | |
| if (!!setId) { | |
| if (!context->outputFileName) { | |
| logcat_panic(context, HELP_TRUE, | |
| "--id='%s' requires -f as well\n", setId); | |
| goto exit; | |
| } | |
| std::string file_name = android::base::StringPrintf( | |
| "%s.id", context->outputFileName); | |
| std::string file; | |
| bool file_ok = android::base::ReadFileToString(file_name, &file); | |
| android::base::WriteStringToFile(setId, file_name, S_IRUSR | S_IWUSR, | |
| getuid(), getgid()); | |
| if (!file_ok || !file.compare(setId)) setId = nullptr; | |
| } | |
| if (!hasSetLogFormat) { | |
| const char* logFormat = android::getenv(context, "ANDROID_PRINTF_LOG"); | |
| if (!!logFormat) { | |
| std::unique_ptr<char, void (*)(void*)> formats(strdup(logFormat), | |
| free); | |
| char* sv = nullptr; // protect against -ENOMEM above | |
| char* arg = formats.get(); | |
| while (!!(arg = strtok_r(arg, delimiters, &sv))) { | |
| err = setLogFormat(context, arg); | |
| // environment should not cause crash of logcat | |
| if ((err < 0) && context->error) { | |
| fprintf(context->error, | |
| "invalid format in ANDROID_PRINTF_LOG '%s'\n", arg); | |
| } | |
| arg = nullptr; | |
| if (err > 0) hasSetLogFormat = true; | |
| } | |
| } | |
| if (!hasSetLogFormat) { | |
| setLogFormat(context, "threadtime"); | |
| } | |
| } | |
| if (forceFilters.size()) { | |
| err = android_log_addFilterString(context->logformat, | |
| forceFilters.c_str()); | |
| if (err < 0) { | |
| logcat_panic(context, HELP_FALSE, | |
| "Invalid filter expression in logcat args\n"); | |
| goto exit; | |
| } | |
| } else if (argc == optind) { | |
| // Add from environment variable | |
| const char* env_tags_orig = android::getenv(context, "ANDROID_LOG_TAGS"); | |
| if (!!env_tags_orig) { | |
| err = android_log_addFilterString(context->logformat, | |
| env_tags_orig); | |
| if (err < 0) { | |
| logcat_panic(context, HELP_TRUE, | |
| "Invalid filter expression in ANDROID_LOG_TAGS\n"); | |
| goto exit; | |
| } | |
| } | |
| } else { | |
| // Add from commandline | |
| for (int i = optind ; i < argc ; i++) { | |
| // skip stderr redirections of _all_ kinds | |
| if ((argv[i][0] == '2') && (argv[i][1] == '>')) continue; | |
| // skip stdout redirections of _all_ kinds | |
| if (argv[i][0] == '>') continue; | |
| err = android_log_addFilterString(context->logformat, argv[i]); | |
| if (err < 0) { | |
| logcat_panic(context, HELP_TRUE, | |
| "Invalid filter expression '%s'\n", argv[i]); | |
| goto exit; | |
| } | |
| } | |
| } | |
| dev = context->devices; | |
| if (tail_time != log_time::EPOCH) { | |
| logger_list = android_logger_list_alloc_time(mode, tail_time, pid); | |
| } else { | |
| logger_list = android_logger_list_alloc(mode, tail_lines, pid); | |
| } | |
| // We have three orthogonal actions below to clear, set log size and | |
| // get log size. All sharing the same iteration loop. | |
| while (dev) { | |
| dev->logger_list = logger_list; | |
| dev->logger = android_logger_open(logger_list, | |
| android_name_to_log_id(dev->device)); | |
| if (!dev->logger) { | |
| reportErrorName(&openDeviceFail, dev->device, allSelected); | |
| dev = dev->next; | |
| continue; | |
| } | |
| if (clearLog || setId) { | |
| if (context->outputFileName) { | |
| int maxRotationCountDigits = | |
| (context->maxRotatedLogs > 0) ? | |
| (int)(floor(log10(context->maxRotatedLogs) + 1)) : | |
| 0; | |
| for (int i = context->maxRotatedLogs ; i >= 0 ; --i) { | |
| std::string file; | |
| if (!i) { | |
| file = android::base::StringPrintf( | |
| "%s", context->outputFileName); | |
| } else { | |
| file = android::base::StringPrintf("%s.%.*d", | |
| context->outputFileName, maxRotationCountDigits, i); | |
| } | |
| if (!file.length()) { | |
| perror("while clearing log files"); | |
| reportErrorName(&clearFail, dev->device, allSelected); | |
| break; | |
| } | |
| err = unlink(file.c_str()); | |
| if (err < 0 && errno != ENOENT && !clearFail) { | |
| perror("while clearing log files"); | |
| reportErrorName(&clearFail, dev->device, allSelected); | |
| } | |
| } | |
| } else if (android_logger_clear(dev->logger)) { | |
| reportErrorName(&clearFail, dev->device, allSelected); | |
| } | |
| } | |
| if (setLogSize) { | |
| if (android_logger_set_log_size(dev->logger, setLogSize)) { | |
| reportErrorName(&setSizeFail, dev->device, allSelected); | |
| } | |
| } | |
| if (getLogSize) { | |
| long size = android_logger_get_log_size(dev->logger); | |
| long readable = android_logger_get_log_readable_size(dev->logger); | |
| if ((size < 0) || (readable < 0)) { | |
| reportErrorName(&getSizeFail, dev->device, allSelected); | |
| } else { | |
| auto size_format = format_of_size(size); | |
| auto readable_format = format_of_size(readable); | |
| std::string str = android::base::StringPrintf( | |
| "%s: ring buffer is %lu %sB (%lu %sB consumed)," | |
| " max entry is %d B, max payload is %d B\n", | |
| dev->device, | |
| size_format.first, size_format.second, | |
| readable_format.first, readable_format.second, | |
| (int)LOGGER_ENTRY_MAX_LEN, | |
| (int)LOGGER_ENTRY_MAX_PAYLOAD); | |
| TEMP_FAILURE_RETRY(write(context->output_fd, | |
| str.data(), str.length())); | |
| } | |
| } | |
| dev = dev->next; | |
| } | |
| context->retval = EXIT_SUCCESS; | |
| // report any errors in the above loop and exit | |
| if (openDeviceFail) { | |
| logcat_panic(context, HELP_FALSE, | |
| "Unable to open log device '%s'\n", openDeviceFail); | |
| goto close; | |
| } | |
| if (clearFail) { | |
| logcat_panic(context, HELP_FALSE, | |
| "failed to clear the '%s' log\n", clearFail); | |
| goto close; | |
| } | |
| if (setSizeFail) { | |
| logcat_panic(context, HELP_FALSE, | |
| "failed to set the '%s' log size\n", setSizeFail); | |
| goto close; | |
| } | |
| if (getSizeFail) { | |
| logcat_panic(context, HELP_FALSE, | |
| "failed to get the readable '%s' log size", getSizeFail); | |
| goto close; | |
| } | |
| if (setPruneList) { | |
| size_t len = strlen(setPruneList); | |
| // extra 32 bytes are needed by android_logger_set_prune_list | |
| size_t bLen = len + 32; | |
| char* buf = nullptr; | |
| if (asprintf(&buf, "%-*s", (int)(bLen - 1), setPruneList) > 0) { | |
| buf[len] = '\0'; | |
| if (android_logger_set_prune_list(logger_list, buf, bLen)) { | |
| logcat_panic(context, HELP_FALSE, | |
| "failed to set the prune list"); | |
| } | |
| free(buf); | |
| } else { | |
| logcat_panic(context, HELP_FALSE, | |
| "failed to set the prune list (alloc)"); | |
| } | |
| goto close; | |
| } | |
| if (printStatistics || getPruneList) { | |
| size_t len = 8192; | |
| char* buf; | |
| for (int retry = 32; (retry >= 0) && ((buf = new char[len])); | |
| delete[] buf, buf = nullptr, --retry) { | |
| if (getPruneList) { | |
| android_logger_get_prune_list(logger_list, buf, len); | |
| } else { | |
| android_logger_get_statistics(logger_list, buf, len); | |
| } | |
| buf[len - 1] = '\0'; | |
| if (atol(buf) < 3) { | |
| delete[] buf; | |
| buf = nullptr; | |
| break; | |
| } | |
| size_t ret = atol(buf) + 1; | |
| if (ret <= len) { | |
| len = ret; | |
| break; | |
| } | |
| len = ret; | |
| } | |
| if (!buf) { | |
| logcat_panic(context, HELP_FALSE, "failed to read data"); | |
| goto close; | |
| } | |
| // remove trailing FF | |
| char* cp = buf + len - 1; | |
| *cp = '\0'; | |
| bool truncated = *--cp != '\f'; | |
| if (!truncated) *cp = '\0'; | |
| // squash out the byte count | |
| cp = buf; | |
| if (!truncated) { | |
| while (isdigit(*cp)) ++cp; | |
| if (*cp == '\n') ++cp; | |
| } | |
| len = strlen(cp); | |
| TEMP_FAILURE_RETRY(write(context->output_fd, cp, len)); | |
| delete[] buf; | |
| goto close; | |
| } | |
| if (getLogSize || setLogSize || clearLog) goto close; | |
| setupOutputAndSchedulingPolicy(context, !(mode & ANDROID_LOG_NONBLOCK)); | |
| if (context->stop) goto close; | |
| // LOG_EVENT_INT(10, 12345); | |
| // LOG_EVENT_LONG(11, 0x1122334455667788LL); | |
| // LOG_EVENT_STRING(0, "whassup, doc?"); | |
| dev = nullptr; | |
| while (!context->stop && | |
| (!context->maxCount || (context->printCount < context->maxCount))) { | |
| struct log_msg log_msg; | |
| int ret = android_logger_list_read(logger_list, &log_msg); | |
| if (!ret) { | |
| logcat_panic(context, HELP_FALSE, "read: unexpected EOF!\n"); | |
| break; | |
| } | |
| if (ret < 0) { | |
| if (ret == -EAGAIN) break; | |
| if (ret == -EIO) { | |
| logcat_panic(context, HELP_FALSE, "read: unexpected EOF!\n"); | |
| break; | |
| } | |
| if (ret == -EINVAL) { | |
| logcat_panic(context, HELP_FALSE, "read: unexpected length.\n"); | |
| break; | |
| } | |
| logcat_panic(context, HELP_FALSE, "logcat read failure\n"); | |
| break; | |
| } | |
| log_device_t* d; | |
| for (d = context->devices; d; d = d->next) { | |
| if (android_name_to_log_id(d->device) == log_msg.id()) break; | |
| } | |
| if (!d) { | |
| context->devCount = 2; // set to Multiple | |
| d = &unexpected; | |
| d->binary = log_msg.id() == LOG_ID_EVENTS; | |
| } | |
| if (dev != d) { | |
| dev = d; | |
| maybePrintStart(context, dev, printDividers); | |
| if (context->stop) break; | |
| } | |
| if (context->printBinary) { | |
| printBinary(context, &log_msg); | |
| } else { | |
| processBuffer(context, dev, &log_msg); | |
| } | |
| } | |
| close: | |
| // Short and sweet. Implemented generic version in android_logcat_destroy. | |
| while (!!(dev = context->devices)) { | |
| context->devices = dev->next; | |
| delete dev; | |
| } | |
| android_logger_list_free(logger_list); | |
| exit: | |
| // close write end of pipe to help things along | |
| if (context->output_fd == context->fds[1]) { | |
| android::close_output(context); | |
| } | |
| if (context->error_fd == context->fds[1]) { | |
| android::close_error(context); | |
| } | |
| if (context->fds[1] >= 0) { | |
| // NB: should be closed by the above | |
| int save_errno = errno; | |
| close(context->fds[1]); | |
| errno = save_errno; | |
| context->fds[1] = -1; | |
| } | |
| context->thread_stopped = true; | |
| return context->retval; | |
| } | |
| // Can block | |
| int android_logcat_run_command(android_logcat_context ctx, | |
| int output, int error, | |
| int argc, char* const* argv, | |
| char* const* envp) { | |
| android_logcat_context_internal* context = ctx; | |
| context->output_fd = output; | |
| context->error_fd = error; | |
| context->argc = argc; | |
| context->argv = argv; | |
| context->envp = envp; | |
| context->stop = false; | |
| context->thread_stopped = false; | |
| return __logcat(context); | |
| } | |
| // Finished with context | |
| int android_logcat_destroy(android_logcat_context* ctx) { | |
| android_logcat_context_internal* context = *ctx; | |
| if (!context) return -EBADF; | |
| *ctx = nullptr; | |
| context->stop = true; | |
| while (context->thread_stopped == false) { | |
| // Makes me sad, replace thread_stopped with semaphore. Short lived. | |
| sched_yield(); | |
| } | |
| delete context->regex; | |
| context->argv_hold.clear(); | |
| context->args.clear(); | |
| context->envp_hold.clear(); | |
| context->envs.clear(); | |
| if (context->fds[0] >= 0) { | |
| close(context->fds[0]); | |
| context->fds[0] = -1; | |
| } | |
| android::close_output(context); | |
| android::close_error(context); | |
| if (context->fds[1] >= 0) { | |
| // NB: this should be closed by close_output, but just in case... | |
| close(context->fds[1]); | |
| context->fds[1] = -1; | |
| } | |
| android_closeEventTagMap(context->eventTagMap); | |
| // generic cleanup of devices list to handle all possible dirty cases | |
| log_device_t* dev; | |
| while (!!(dev = context->devices)) { | |
| struct logger_list* logger_list = dev->logger_list; | |
| if (logger_list) { | |
| for (log_device_t* d = dev; d; d = d->next) { | |
| if (d->logger_list == logger_list) d->logger_list = nullptr; | |
| } | |
| android_logger_list_free(logger_list); | |
| } | |
| context->devices = dev->next; | |
| delete dev; | |
| } | |
| int retval = context->retval; | |
| free(context); | |
| return retval; | |
| } |