ACPR/android_system_core
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
android_system_core/logcat/logcat.cpp
Mark Salyzyn 378f4745a2 logcat: Adjust help to make it more meaningful 
It is not clear about the long option aliases, list
them comma separate first for clarity. Squash lines
of help content if possible. Lock to 3 indents, one
for options, another for text on same line as options
and another for next line or continuation.

Bug: 28120456
Change-Id: I5331acde3ac0fd3b87f6699ba108f6cef46a1563
2016-04-13 11:42:52 -07:00

1264 lines
42 KiB
C++
Raw Blame History

// Copyright 2006-2015 The Android Open Source Project
#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 <sched.h>
#include <signal.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 <memory>
#include <string>
#include <android-base/file.h>
#include <android-base/strings.h>
#include <cutils/sched_policy.h>
#include <cutils/sockets.h>
#include <log/event_tag_map.h>
#include <log/log.h>
#include <log/log_read.h>
#include <log/logd.h>
#include <log/logger.h>
#include <log/logprint.h>
#include <system/thread_defs.h>
#include <pcrecpp.h>
#define DEFAULT_MAX_ROTATED_LOGS 4
static AndroidLogFormat * g_logformat;
/* logd prefixes records with a length field */
#define RECORD_LENGTH_FIELD_SIZE_BYTES sizeof(uint32_t)
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 = NULL;
printed = false;
logger = NULL;
logger_list = NULL;
}
};
namespace android {
/* Global Variables */
static const char * g_outputFileName;
// 0 means "no log rotation"
static size_t g_logRotateSizeKBytes;
// 0 means "unbounded"
static size_t g_maxRotatedLogs = DEFAULT_MAX_ROTATED_LOGS;
static int g_outFD = -1;
static size_t g_outByteCount;
static int g_printBinary;
static int g_devCount; // >1 means multiple
static pcrecpp::RE* g_regex;
// 0 means "infinite"
static size_t g_maxCount;
static size_t g_printCount;
static bool g_printItAnyways;
// if showHelp is set, newline required in fmt statement to transition to usage
__noreturn static void logcat_panic(bool showHelp, const char *fmt, ...) __printflike(2,3);
static int openLogFile (const char *pathname)
{
return open(pathname, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR);
}
static void rotateLogs()
{
int err;
// Can't rotate logs if we're not outputting to a file
if (g_outputFileName == NULL) {
return;
}
close(g_outFD);
// Compute the maximum number of digits needed to count up to g_maxRotatedLogs in decimal.
// eg: g_maxRotatedLogs == 30 -> log10(30) == 1.477 -> maxRotationCountDigits == 2
int maxRotationCountDigits =
(g_maxRotatedLogs > 0) ? (int) (floor(log10(g_maxRotatedLogs) + 1)) : 0;
for (int i = g_maxRotatedLogs ; i > 0 ; i--) {
char *file0, *file1;
asprintf(&file1, "%s.%.*d", g_outputFileName, maxRotationCountDigits, i);
if (i - 1 == 0) {
asprintf(&file0, "%s", g_outputFileName);
} else {
asprintf(&file0, "%s.%.*d", g_outputFileName, maxRotationCountDigits, i - 1);
}
if (!file0 || !file1) {
perror("while rotating log files");
break;
}
err = rename(file0, file1);
if (err < 0 && errno != ENOENT) {
perror("while rotating log files");
}
free(file1);
free(file0);
}
g_outFD = openLogFile(g_outputFileName);
if (g_outFD < 0) {
logcat_panic(false, "couldn't open output file");
}
g_outByteCount = 0;
}
void printBinary(struct log_msg *buf)
{
size_t size = buf->len();
TEMP_FAILURE_RETRY(write(g_outFD, buf, size));
}
static bool regexOk(const AndroidLogEntry& entry)
{
if (!g_regex) {
return true;
}
std::string messageString(entry.message, entry.messageLen);
return g_regex->PartialMatch(messageString);
}
static void processBuffer(log_device_t* dev, struct log_msg *buf)
{
int bytesWritten = 0;
int err;
AndroidLogEntry entry;
char binaryMsgBuf[1024];
if (dev->binary) {
static bool hasOpenedEventTagMap = false;
static EventTagMap *eventTagMap = NULL;
if (!eventTagMap && !hasOpenedEventTagMap) {
eventTagMap = android_openEventTagMap(EVENT_TAG_MAP_FILE);
hasOpenedEventTagMap = true;
}
err = android_log_processBinaryLogBuffer(&buf->entry_v1, &entry,
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) {
goto error;
}
if (android_log_shouldPrintLine(g_logformat, entry.tag, entry.priority)) {
bool match = regexOk(entry);
g_printCount += match;
if (match || g_printItAnyways) {
bytesWritten = android_log_printLogLine(g_logformat, g_outFD, &entry);
if (bytesWritten < 0) {
logcat_panic(false, "output error");
}
}
}
g_outByteCount += bytesWritten;
if (g_logRotateSizeKBytes > 0
&& (g_outByteCount / 1024) >= g_logRotateSizeKBytes
) {
rotateLogs();
}
error:
//fprintf (stderr, "Error processing record\n");
return;
}
static void maybePrintStart(log_device_t* dev, bool printDividers) {
if (!dev->printed || printDividers) {
if (g_devCount > 1 && !g_printBinary) {
char buf[1024];
snprintf(buf, sizeof(buf), "--------- %s %s\n",
dev->printed ? "switch to" : "beginning of",
dev->device);
if (write(g_outFD, buf, strlen(buf)) < 0) {
logcat_panic(false, "output error");
}
}
dev->printed = true;
}
}
static void setupOutput()
{
if (g_outputFileName == NULL) {
g_outFD = STDOUT_FILENO;
} else {
if (set_sched_policy(0, SP_BACKGROUND) < 0) {
fprintf(stderr, "failed to set background scheduling policy\n");
}
struct sched_param param;
memset(&param, 0, sizeof(param));
if (sched_setscheduler((pid_t) 0, SCHED_BATCH, &param) < 0) {
fprintf(stderr, "failed to set to batch scheduler\n");
}
if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
fprintf(stderr, "failed set to priority\n");
}
g_outFD = openLogFile (g_outputFileName);
if (g_outFD < 0) {
logcat_panic(false, "couldn't open output file");
}
struct stat statbuf;
if (fstat(g_outFD, &statbuf) == -1) {
close(g_outFD);
logcat_panic(false, "couldn't get output file stat\n");
}
if ((size_t) statbuf.st_size > SIZE_MAX || statbuf.st_size < 0) {
close(g_outFD);
logcat_panic(false, "invalid output file stat\n");
}
g_outByteCount = statbuf.st_size;
}
}
static void show_help(const char *cmd)
{
fprintf(stderr,"Usage: %s [options] [filterspecs]\n", cmd);
fprintf(stderr, "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"
" -v <format>, --format=<format>\n"
" Sets the log print format, where <format> is:\n"
" brief color epoch long monotonic printable process raw\n"
" tag thread threadtime time uid usec UTC year zone\n"
" -D, --dividers Print dividers between each log buffer\n"
" -c, --clear Clear (flush) the entire log and exit\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 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"
// Leave security (Device Owner only installations) and
// kernel (userdebug and eng) buffers undocumented.
" -b <buffer>, --buffer=<buffer> Request alternate ring buffer, 'main',\n"
" 'system', 'radio', 'events', 'crash', 'default' or 'all'.\n"
" Multiple -b parameters are allowed. Buffers interleaved.\n"
" Default -b main -b system -b 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(stderr,"\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 int setLogFormat(const char * formatString)
{
static AndroidLogPrintFormat format;
format = android_log_formatFromString(formatString);
if (format == FORMAT_OFF) {
// FORMAT_OFF means invalid string
return -1;
}
return android_log_setPrintFormat(g_logformat, format);
}
static const char multipliers[][2] = {
{ "" },
{ "K" },
{ "M" },
{ "G" }
};
static unsigned long value_of_size(unsigned long value)
{
for (unsigned i = 0;
(i < sizeof(multipliers)/sizeof(multipliers[0])) && (value >= 1024);
value /= 1024, ++i) ;
return value;
}
static const char *multiplier_of_size(unsigned long value)
{
unsigned i;
for (i = 0;
(i < sizeof(multipliers)/sizeof(multipliers[0])) && (value >= 1024);
value /= 1024, ++i) ;
return multipliers[i];
}
/*String to unsigned int, returns -1 if it fails*/
static bool getSizeTArg(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(bool showHelp, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
if (showHelp) {
show_help(getprogname());
}
exit(EXIT_FAILURE);
}
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 gestalt of all matching existing output files
static log_time lastLogTime(char *outputFileName) {
log_time retval(log_time::EPOCH);
if (!outputFileName) {
return retval;
}
std::string directory;
char *file = strrchr(outputFileName, '/');
if (!file) {
directory = ".";
file = outputFileName;
} else {
*file = '\0';
directory = outputFileName;
*file = '/';
++file;
}
std::unique_ptr<DIR, int(*)(DIR*)>
dir(opendir(directory.c_str()), closedir);
if (!dir.get()) {
return retval;
}
clockid_t clock_type = android_log_clockid();
log_time now(clock_type);
bool monotonic = clock_type == CLOCK_MONOTONIC;
size_t len = strlen(file);
log_time modulo(0, NS_PER_SEC);
struct dirent *dp;
while ((dp = readdir(dir.get())) != NULL) {
if ((dp->d_type != DT_REG)
// If we are using realtime, check all files that match the
// basename for latest time. If we are using monotonic time
// then only check the main file because time cycles on
// every reboot.
|| strncmp(dp->d_name, file, len + monotonic)
|| (dp->d_name[len]
&& ((dp->d_name[len] != '.')
|| !isdigit(dp->d_name[len+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;
}
} /* namespace android */
int main(int argc, char **argv)
{
using namespace android;
int err;
int hasSetLogFormat = 0;
int clearLog = 0;
int getLogSize = 0;
unsigned long setLogSize = 0;
int getPruneList = 0;
char *setPruneList = NULL;
int printStatistics = 0;
int mode = ANDROID_LOG_RDONLY;
const char *forceFilters = NULL;
log_device_t* devices = NULL;
log_device_t* dev;
bool printDividers = false;
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;
signal(SIGPIPE, exit);
g_logformat = android_log_format_new();
if (argc == 2 && 0 == strcmp(argv[1], "--help")) {
show_help(argv[0]);
return EXIT_SUCCESS;
}
for (;;) {
int ret;
int option_index = 0;
// list of long-argument only strings for later comparison
static const char pid_str[] = "pid";
static const char wrap_str[] = "wrap";
static const char print_str[] = "print";
static const struct option long_options[] = {
{ "binary", no_argument, NULL, 'B' },
{ "buffer", required_argument, NULL, 'b' },
{ "buffer-size", optional_argument, NULL, 'g' },
{ "clear", no_argument, NULL, 'c' },
{ "dividers", no_argument, NULL, 'D' },
{ "file", required_argument, NULL, 'f' },
{ "format", required_argument, NULL, 'v' },
// hidden and undocumented reserved alias for --regex
{ "grep", required_argument, NULL, 'e' },
// hidden and undocumented reserved alias for --max-count
{ "head", required_argument, NULL, 'm' },
{ "last", no_argument, NULL, 'L' },
{ "max-count", required_argument, NULL, 'm' },
{ pid_str, required_argument, NULL, 0 },
{ print_str, no_argument, NULL, 0 },
{ "prune", optional_argument, NULL, 'p' },
{ "regex", required_argument, NULL, 'e' },
{ "rotate-count", required_argument, NULL, 'n' },
{ "rotate-kbytes", required_argument, NULL, 'r' },
{ "statistics", no_argument, NULL, 'S' },
// hidden and undocumented reserved alias for -t
{ "tail", required_argument, NULL, 't' },
// support, but ignore and do not document, the optional argument
{ wrap_str, optional_argument, NULL, 0 },
{ NULL, 0, NULL, 0 }
};
ret = getopt_long(argc, argv, ":cdDLt:T:gG:sQf:r:n:v:b:BSpP:m:e:",
long_options, &option_index);
if (ret < 0) {
break;
}
switch (ret) {
case 0:
// One of the long options
if (long_options[option_index].name == pid_str) {
// ToDo: determine runtime PID_MAX?
if (!getSizeTArg(optarg, &pid, 1)) {
logcat_panic(true, "%s %s out of range\n",
long_options[option_index].name, optarg);
}
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(true, "%s %s out of range\n",
long_options[option_index].name, optarg);
}
if (dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) {
fprintf(stderr,
"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) {
g_printItAnyways = true;
break;
}
break;
case 's':
// default to all silent
android_log_addFilterRule(g_logformat, "*:s");
break;
case 'c':
clearLog = 1;
mode |= ANDROID_LOG_WRONLY;
break;
case 'L':
mode |= ANDROID_LOG_PSTORE;
break;
case 'd':
mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK;
break;
case 't':
got_t = true;
mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK;
/* FALLTHRU */
case 'T':
if (strspn(optarg, "0123456789") != strlen(optarg)) {
char *cp = parseTime(tail_time, optarg);
if (!cp) {
logcat_panic(false, "-%c \"%s\" not in time format\n",
ret, optarg);
}
if (*cp) {
char c = *cp;
*cp = '\0';
fprintf(stderr,
"WARNING: -%c \"%s\"\"%c%s\" time truncated\n",
ret, optarg, c, cp + 1);
*cp = c;
}
} else {
if (!getSizeTArg(optarg, &tail_lines, 1)) {
fprintf(stderr,
"WARNING: -%c %s invalid, setting to 1\n",
ret, optarg);
tail_lines = 1;
}
}
break;
case 'D':
printDividers = true;
break;
case 'e':
g_regex = new pcrecpp::RE(optarg);
break;
case 'm': {
char *end = NULL;
if (!getSizeTArg(optarg, &g_maxCount)) {
logcat_panic(false, "-%c \"%s\" isn't an "
"integer greater than zero\n", ret, optarg);
}
}
break;
case 'g':
if (!optarg) {
getLogSize = 1;
break;
}
// FALLTHRU
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;
/* FALLTHRU */
case 'm':
case 'M':
setLogSize *= 1024;
/* FALLTHRU */
case 'k':
case 'K':
setLogSize *= 1024;
/* FALLTHRU */
case '\0':
break;
default:
setLogSize = 0;
}
if (!setLogSize) {
fprintf(stderr, "ERROR: -G <num><multiplier>\n");
return EXIT_FAILURE;
}
}
break;
case 'p':
if (!optarg) {
getPruneList = 1;
break;
}
// FALLTHRU
case 'P':
setPruneList = optarg;
break;
case 'b': {
if (strcmp(optarg, "default") == 0) {
for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
switch (i) {
case LOG_ID_SECURITY:
case LOG_ID_EVENTS:
continue;
case LOG_ID_MAIN:
case LOG_ID_SYSTEM:
case LOG_ID_CRASH:
break;
default:
continue;
}
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;
}
bool found = false;
for (dev = devices; dev; dev = dev->next) {
if (!strcmp(optarg, dev->device)) {
found = true;
break;
}
if (!dev->next) {
break;
}
}
if (found) {
break;
}
log_device_t* d = new log_device_t(name, false);
if (dev) {
dev->next = d;
dev = d;
} else {
devices = dev = d;
}
g_devCount++;
}
break;
}
if (strcmp(optarg, "all") == 0) {
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;
}
bool found = false;
for (dev = devices; dev; dev = dev->next) {
if (!strcmp(optarg, dev->device)) {
found = true;
break;
}
if (!dev->next) {
break;
}
}
if (found) {
break;
}
bool binary = !strcmp(name, "events") ||
!strcmp(name, "security");
log_device_t* d = new log_device_t(name, binary);
if (dev) {
dev->next = d;
dev = d;
} else {
devices = dev = d;
}
g_devCount++;
}
break;
}
bool binary = !(strcmp(optarg, "events") &&
strcmp(optarg, "security"));
if (devices) {
dev = devices;
while (dev->next) {
if (!strcmp(optarg, dev->device)) {
dev = NULL;
break;
}
dev = dev->next;
}
if (dev) {
dev->next = new log_device_t(optarg, binary);
}
} else {
devices = new log_device_t(optarg, binary);
}
g_devCount++;
}
break;
case 'B':
g_printBinary = 1;
break;
case 'f':
if ((tail_time == log_time::EPOCH) && (tail_lines == 0)) {
tail_time = lastLogTime(optarg);
}
// redirect output to a file
g_outputFileName = optarg;
break;
case 'r':
if (!getSizeTArg(optarg, &g_logRotateSizeKBytes, 1)) {
logcat_panic(true, "Invalid parameter %s to -r\n", optarg);
}
break;
case 'n':
if (!getSizeTArg(optarg, &g_maxRotatedLogs, 1)) {
logcat_panic(true, "Invalid parameter %s to -n\n", optarg);
}
break;
case 'v':
err = setLogFormat (optarg);
if (err < 0) {
logcat_panic(true, "Invalid parameter %s to -v\n", optarg);
}
hasSetLogFormat |= err;
break;
case 'Q':
/* 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. If nothing is found, the program should */
/* quit immediately */
#define KERNEL_OPTION "androidboot.logcat="
#define CONSOLE_OPTION "androidboot.console="
{
int fd;
char* logcat;
char* console;
int force_exit = 1;
static char cmdline[1024];
fd = open("/proc/cmdline", O_RDONLY);
if (fd >= 0) {
int n = read(fd, cmdline, sizeof(cmdline)-1 );
if (n < 0) n = 0;
cmdline[n] = 0;
close(fd);
} else {
cmdline[0] = 0;
}
logcat = strstr( cmdline, KERNEL_OPTION );
console = strstr( cmdline, CONSOLE_OPTION );
if (logcat != NULL) {
char* p = logcat + sizeof(KERNEL_OPTION)-1;;
char* q = strpbrk( p, " \t\n\r" );;
if (q != NULL)
*q = 0;
forceFilters = p;
force_exit = 0;
}
/* if nothing found or invalid filters, exit quietly */
if (force_exit) {
return EXIT_SUCCESS;
}
/* redirect our output to the emulator console */
if (console) {
char* p = console + sizeof(CONSOLE_OPTION)-1;
char* q = strpbrk( p, " \t\n\r" );
char devname[64];
int len;
if (q != NULL) {
len = q - p;
} else
len = strlen(p);
len = snprintf( devname, sizeof(devname), "/dev/%.*s", len, p );
fprintf(stderr, "logcat using %s (%d)\n", devname, len);
if (len < (int)sizeof(devname)) {
fd = open( devname, O_WRONLY );
if (fd >= 0) {
dup2(fd, 1);
dup2(fd, 2);
close(fd);
}
}
}
}
break;
case 'S':
printStatistics = 1;
break;
case ':':
logcat_panic(true, "Option -%c needs an argument\n", optopt);
break;
default:
logcat_panic(true, "Unrecognized Option %c\n", optopt);
break;
}
}
if (g_maxCount && got_t) {
logcat_panic(true, "Cannot use -m (--max-count) and -t together\n");
}
if (g_printItAnyways && (!g_regex || !g_maxCount)) {
// One day it would be nice if --print -v color and --regex <expr>
// could play with each other and show regex highlighted content.
fprintf(stderr, "WARNING: "
"--print ignored, to be used in combination with\n"
" "
"--regex <expr> and --max-count <N>\n");
g_printItAnyways = false;
}
if (!devices) {
dev = devices = new log_device_t("main", false);
g_devCount = 1;
if (android_name_to_log_id("system") == LOG_ID_SYSTEM) {
dev = dev->next = new log_device_t("system", false);
g_devCount++;
}
if (android_name_to_log_id("crash") == LOG_ID_CRASH) {
dev = dev->next = new log_device_t("crash", false);
g_devCount++;
}
}
if (g_logRotateSizeKBytes != 0 && g_outputFileName == NULL) {
logcat_panic(true, "-r requires -f as well\n");
}
setupOutput();
if (hasSetLogFormat == 0) {
const char* logFormat = getenv("ANDROID_PRINTF_LOG");
if (logFormat != NULL) {
err = setLogFormat(logFormat);
if (err < 0) {
fprintf(stderr, "invalid format in ANDROID_PRINTF_LOG '%s'\n",
logFormat);
}
} else {
setLogFormat("threadtime");
}
}
if (forceFilters) {
err = android_log_addFilterString(g_logformat, forceFilters);
if (err < 0) {
logcat_panic(false, "Invalid filter expression in logcat args\n");
}
} else if (argc == optind) {
// Add from environment variable
char *env_tags_orig = getenv("ANDROID_LOG_TAGS");
if (env_tags_orig != NULL) {
err = android_log_addFilterString(g_logformat, env_tags_orig);
if (err < 0) {
logcat_panic(true,
"Invalid filter expression in ANDROID_LOG_TAGS\n");
}
}
} else {
// Add from commandline
for (int i = optind ; i < argc ; i++) {
err = android_log_addFilterString(g_logformat, argv[i]);
if (err < 0) {
logcat_panic(true, "Invalid filter expression '%s'\n", argv[i]);
}
}
}
dev = 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);
}
const char *openDeviceFail = NULL;
const char *clearFail = NULL;
const char *setSizeFail = NULL;
const char *getSizeFail = NULL;
// 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) {
openDeviceFail = openDeviceFail ?: dev->device;
dev = dev->next;
continue;
}
if (clearLog) {
if (android_logger_clear(dev->logger)) {
clearFail = clearFail ?: dev->device;
}
}
if (setLogSize) {
if (android_logger_set_log_size(dev->logger, setLogSize)) {
setSizeFail = setSizeFail ?: dev->device;
}
}
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)) {
getSizeFail = getSizeFail ?: dev->device;
} else {
printf("%s: ring buffer is %ld%sb (%ld%sb consumed), "
"max entry is %db, max payload is %db\n", dev->device,
value_of_size(size), multiplier_of_size(size),
value_of_size(readable), multiplier_of_size(readable),
(int) LOGGER_ENTRY_MAX_LEN,
(int) LOGGER_ENTRY_MAX_PAYLOAD);
}
}
dev = dev->next;
}
// report any errors in the above loop and exit
if (openDeviceFail) {
logcat_panic(false, "Unable to open log device '%s'\n", openDeviceFail);
}
if (clearFail) {
logcat_panic(false, "failed to clear the '%s' log\n", clearFail);
}
if (setSizeFail) {
logcat_panic(false, "failed to set the '%s' log size\n", setSizeFail);
}
if (getSizeFail) {
logcat_panic(false, "failed to get the readable '%s' log size",
getSizeFail);
}
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 = NULL;
if (asprintf(&buf, "%-*s", (int)(bLen - 1), setPruneList) > 0) {
buf[len] = '\0';
if (android_logger_set_prune_list(logger_list, buf, bLen)) {
logcat_panic(false, "failed to set the prune list");
}
free(buf);
} else {
logcat_panic(false, "failed to set the prune list (alloc)");
}
}
if (printStatistics || getPruneList) {
size_t len = 8192;
char *buf;
for (int retry = 32;
(retry >= 0) && ((buf = new char [len]));
delete [] buf, buf = NULL, --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 = NULL;
break;
}
size_t ret = atol(buf) + 1;
if (ret <= len) {
len = ret;
break;
}
len = ret;
}
if (!buf) {
logcat_panic(false, "failed to read data");
}
// 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;
}
}
printf("%s", cp);
delete [] buf;
return EXIT_SUCCESS;
}
if (getLogSize) {
return EXIT_SUCCESS;
}
if (setLogSize || setPruneList) {
return EXIT_SUCCESS;
}
if (clearLog) {
return EXIT_SUCCESS;
}
//LOG_EVENT_INT(10, 12345);
//LOG_EVENT_LONG(11, 0x1122334455667788LL);
//LOG_EVENT_STRING(0, "whassup, doc?");
dev = NULL;
log_device_t unexpected("unexpected", false);
while (!g_maxCount || (g_printCount < g_maxCount)) {
struct log_msg log_msg;
log_device_t* d;
int ret = android_logger_list_read(logger_list, &log_msg);
if (ret == 0) {
logcat_panic(false, "read: unexpected EOF!\n");
}
if (ret < 0) {
if (ret == -EAGAIN) {
break;
}
if (ret == -EIO) {
logcat_panic(false, "read: unexpected EOF!\n");
}
if (ret == -EINVAL) {
logcat_panic(false, "read: unexpected length.\n");
}
logcat_panic(false, "logcat read failure");
}
for (d = devices; d; d = d->next) {
if (android_name_to_log_id(d->device) == log_msg.id()) {
break;
}
}
if (!d) {
g_devCount = 2; // set to Multiple
d = &unexpected;
d->binary = log_msg.id() == LOG_ID_EVENTS;
}
if (dev != d) {
dev = d;
maybePrintStart(dev, printDividers);
}
if (g_printBinary) {
printBinary(&log_msg);
} else {
processBuffer(dev, &log_msg);
}
}
android_logger_list_free(logger_list);
return EXIT_SUCCESS;
}
Reference in a new issue View git blame Copy permalink