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Merge changes I7ebb6146,I0b42736c,I5331acde

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* changes:
  logcat: expand -n, -r and -b
  logcat: allow comma-separate list of buffers
  logcat: Adjust help to make it more meaningful
This commit is contained in:
Mark Salyzyn 2016-04-13 21:32:48 +00:00 • committed by Gerrit Code Review
commit df7c1ed3a0
3 changed files with 218 additions and 165 deletions
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308
logcat/logcat.cpp
View file

@ -27,6 +27,7 @@
#include <android-base/file.h> #include <android-base/file.h>
#include <android-base/strings.h> #include <android-base/strings.h>
#include <cutils/properties.h>
#include <cutils/sched_policy.h> #include <cutils/sched_policy.h>
#include <cutils/sockets.h> #include <cutils/sockets.h>
#include <log/event_tag_map.h> #include <log/event_tag_map.h>
@ -278,66 +279,68 @@ static void show_help(const char *cmd)
fprintf(stderr,"Usage: %s [options] [filterspecs]\n", cmd); fprintf(stderr,"Usage: %s [options] [filterspecs]\n", cmd);
fprintf(stderr, "options include:\n" fprintf(stderr, "options include:\n"
" -s Set default filter to silent.\n" " -s Set default filter to silent. Equivalent to filterspec '*:S'\n"
" Like specifying filterspec '*:S'\n" " -f <file>, --file=<file> Log to file. Default is stdout\n"
" -f <filename> Log to file. Default is stdout\n" " -r <kbytes>, --rotate-kbytes=<kbytes> Rotate log every kbytes. Requires -f\n"
" --file=<filename>\n" " option. Permits property expansion.\n"
" -r <kbytes> Rotate log every kbytes. Requires -f\n" " -n <count>, --rotate-count=<count> Sets max number of rotated logs to\n"
" --rotate-kbytes=<kbytes>\n" " <count>, default 4. Permits property expansion.\n"
" -n <count> Sets max number of rotated logs to <count>, default 4\n" " -v <format>, --format=<format>\n"
" --rotate-count=<count>\n" " Sets the log print format, where <format> is:\n"
" -v <format> Sets the log print format, where <format> is:\n" " brief color epoch long monotonic printable process raw\n"
" --format=<format>\n" " tag thread threadtime time uid usec UTC year zone\n"
" brief color epoch long monotonic printable process raw\n" " -D, --dividers Print dividers between each log buffer\n"
" tag thread threadtime time uid usec UTC year zone\n\n" " -c, --clear Clear (flush) the entire log and exit\n"
" -D print dividers between each log buffer\n" " -d Dump the log and then exit (don't block)\n"
" --dividers\n" " -e <expr>, --regex=<expr>\n"
" -c clear (flush) the entire log and exit\n" " Only print lines where the log message matches <expr>\n"
" --clear\n" " where <expr> is a regular expression\n"
" -d dump the log and then exit (don't block)\n" // Leave --head undocumented as alias for -m
" -e <expr> only print lines where the log message matches <expr>\n" " -m <count>, --max-count=<count>\n"
" --regex <expr> where <expr> is a regular expression\n" " Quit after printing <count> lines. This is meant to be\n"
" -m <count> quit after printing <count> lines. This is meant to be\n" " paired with --regex, but will work on its own.\n"
" --max-count=<count> paired with --regex, but will work on its own.\n" " --print Paired with --regex and --max-count to let content bypass\n"
" --print paired with --regex and --max-count to let content bypass\n"
" regex filter but still stop at number of matches.\n" " regex filter but still stop at number of matches.\n"
" -t <count> print only the most recent <count> lines (implies -d)\n" // Leave --tail undocumented as alias for -t
" -t '<time>' print most recent lines since specified time (implies -d)\n" " -t <count> Print only the most recent <count> lines (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 (implies -d)\n"
" -T '<time>' print most recent lines since specified time (not imply -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" " 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" " 'YYYY-MM-DD hh:mm:ss.mmm...' or 'sssss.mmm...' format\n"
" -g get the size of the log's ring buffer and exit\n" " -g, --buffer-size Get the size of the ring buffer.\n"
" --buffer-size\n" " -G <size>, --buffer-size=<size>\n"
" -G <size> set size of log ring buffer, may suffix with K or M.\n" " Set size of log ring buffer, may suffix with K or M.\n"
" --buffer-size=<size>\n" " -L, -last Dump logs from prior to last reboot\n"
" -L dump logs from prior to last reboot\n"
" --last\n"
// Leave security (Device Owner only installations) and // Leave security (Device Owner only installations) and
// kernel (userdebug and eng) buffers undocumented. // kernel (userdebug and eng) buffers undocumented.
" -b <buffer> Request alternate ring buffer, 'main', 'system', 'radio',\n" " -b <buffer>, --buffer=<buffer> Request alternate ring buffer, 'main',\n"
" --buffer=<buffer> 'events', 'crash', 'default' or 'all'. Multiple -b\n" " 'system', 'radio', 'events', 'crash', 'default' or 'all'.\n"
" parameters are allowed and results are interleaved. The\n" " Multiple -b parameters or comma separated list of buffers are\n"
" default is -b main -b system -b crash.\n" " allowed. Buffers interleaved. Default -b main,system,crash.\n"
" -B output the log in binary.\n" " Permits property expansion.\n"
" --binary\n" " -B, --binary Output the log in binary.\n"
" -S output statistics.\n" " -S, --statistics Output statistics.\n"
" --statistics\n" " -p, --prune Print prune white and ~black list. Service is specified as\n"
" -p print prune white and ~black list. Service is specified as\n" " UID, UID/PID or /PID. Weighed for quicker pruning if prefix\n"
" --prune UID, UID/PID or /PID. Weighed for quicker pruning if prefix\n"
" with ~, otherwise weighed for longevity if unadorned. All\n" " with ~, otherwise weighed for longevity if unadorned. All\n"
" other pruning activity is oldest first. Special case ~!\n" " other pruning activity is oldest first. Special case ~!\n"
" represents an automatic quicker pruning for the noisiest\n" " represents an automatic quicker pruning for the noisiest\n"
" UID as determined by the current statistics.\n" " UID as determined by the current statistics.\n"
" -P '<list> ...' set prune white and ~black list, using same format as\n" " -P '<list> ...', --prune='<list> ...'\n"
" --prune='<list> ...' printed above. Must be quoted.\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" " --pid=<pid> Only prints logs from the given pid.\n"
// Check ANDROID_LOG_WRAP_DEFAULT_TIMEOUT value // 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" " --wrap Sleep for 2 hours or when buffer about to wrap whichever\n"
" comes first. Improves efficiency of polling by providing\n" " comes first. Improves efficiency of polling by providing\n"
" an about-to-wrap wakeup.\n"); " an about-to-wrap wakeup.\n");
fprintf(stderr,"\nfilterspecs are a series of \n" fprintf(stderr,"\nProperty expansion where available, may need to be single quoted to prevent\n"
"shell expansion:\n"
" ${key} - Expand string with property value associated with key\n"
" ${key:-default} - Expand, if property key value clear, use default\n"
"\nfilterspecs are a series of \n"
" <tag>[:priority]\n\n" " <tag>[:priority]\n\n"
"where <tag> is a log component tag (or * for all) and priority is:\n" "where <tag> is a log component tag (or * for all) and priority is:\n"
" V Verbose (default for <tag>)\n" " V Verbose (default for <tag>)\n"
@ -394,7 +397,7 @@ static const char *multiplier_of_size(unsigned long value)
} }
/*String to unsigned int, returns -1 if it fails*/ /*String to unsigned int, returns -1 if it fails*/
static bool getSizeTArg(char *ptr, size_t *val, size_t min = 0, static bool getSizeTArg(const char *ptr, size_t *val, size_t min = 0,
size_t max = SIZE_MAX) size_t max = SIZE_MAX)
{ {
if (!ptr) { if (!ptr) {
@ -535,6 +538,49 @@ static log_time lastLogTime(char *outputFileName) {
return retval; return retval;
} }
// Expand multiple flat property references ${<tag>:-default} or ${tag}.
//
// ToDo: Do we permit nesting?
// ${persist.logcat.something:-${ro.logcat.something:-maybesomething}}
// For now this will result in a syntax error for caller and is acceptable.
//
std::string expand(const char *str)
{
std::string retval(str);
// Caller has no use for ${, } or :- as literals so no use for escape
// character. Result expectations are a number or a string, with validity
// checking for both in caller. Recursive expansion or other syntax errors
// will result in content caller can not obviously tolerate, error must
// report substring if applicable, expanded and original content (if
// different) so that it will be clear to user what they did wrong.
for (size_t pos; (pos = retval.find("${")) != std::string::npos; ) {
size_t epos = retval.find("}", pos + 2);
if (epos == std::string::npos) {
break; // Caller will error out, showing this unexpanded.
}
size_t def = retval.find(":-", pos + 2);
if (def >= epos) {
def = std::string::npos;
}
std::string default_value("");
std::string key;
if (def == std::string::npos) {
key = retval.substr(pos + 2, epos - (pos + 2));
} else {
key = retval.substr(pos + 2, def - (pos + 2));
default_value = retval.substr(def + 2, epos - (def + 2));
}
char value[PROPERTY_VALUE_MAX];
property_get(key.c_str(), value, default_value.c_str());
// Caller will error out, syntactically empty content at this point
// will not be tolerated as expected.
retval.replace(pos, epos - pos + 1, value);
}
return retval;
}
} /* namespace android */ } /* namespace android */
@ -765,111 +811,75 @@ int main(int argc, char **argv)
break; break;
case 'b': { case 'b': {
if (strcmp(optarg, "default") == 0) { unsigned idMask = 0;
for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) { std::string expanded = expand(optarg);
switch (i) { std::istringstream copy(expanded);
case LOG_ID_SECURITY: std::string token;
case LOG_ID_EVENTS: // wish for strtok and ",:; \t\n\r\f" for hidden flexibility
continue; while (std::getline(copy, token, ',')) { // settle for ","
case LOG_ID_MAIN: if (token.compare("default") == 0) {
case LOG_ID_SYSTEM: idMask |= (1 << LOG_ID_MAIN) |
case LOG_ID_CRASH: (1 << LOG_ID_SYSTEM) |
break; (1 << LOG_ID_CRASH);
default: } else if (token.compare("all") == 0) {
continue; idMask = (unsigned)-1;
} } else {
log_id_t log_id = android_name_to_log_id(token.c_str());
const char *name = android_log_id_to_name(log_id);
const char *name = android_log_id_to_name((log_id_t)i); if (token.compare(name) != 0) {
log_id_t log_id = android_name_to_log_id(name); bool strDifferent = expanded.compare(token);
if (expanded.compare(optarg)) {
if (log_id != (log_id_t)i) { expanded += " expanded from ";
continue; expanded += optarg;
}
bool found = false;
for (dev = devices; dev; dev = dev->next) {
if (!strcmp(optarg, dev->device)) {
found = true;
break;
} }
if (!dev->next) { if (strDifferent) {
break; expanded = token + " within " + expanded;
} }
logcat_panic(true, "unknown buffer -b %s\n",
expanded.c_str());
} }
if (found) { idMask |= (1 << log_id);
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) {
for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) { const char *name = android_log_id_to_name((log_id_t)i);
const char *name = android_log_id_to_name((log_id_t)i); log_id_t log_id = android_name_to_log_id(name);
log_id_t log_id = android_name_to_log_id(name);
if (log_id != (log_id_t)i) { if (log_id != (log_id_t)i) {
continue; continue;
} }
if ((idMask & (1 << i)) == 0) {
continue;
}
bool found = false; bool found = false;
for (dev = devices; dev; dev = dev->next) { for (dev = devices; dev; dev = dev->next) {
if (!strcmp(optarg, dev->device)) { if (!strcmp(name, dev->device)) {
found = true; found = true;
break;
}
if (!dev->next) {
break;
}
}
if (found) {
break; break;
} }
if (!dev->next) {
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; break;
} }
dev = dev->next;
} }
if (found) {
continue;
}
bool binary = !strcmp(name, "events") ||
!strcmp(name, "security");
log_device_t* d = new log_device_t(name, binary);
if (dev) { if (dev) {
dev->next = new log_device_t(optarg, binary); dev->next = d;
dev = d;
} else {
devices = dev = d;
} }
} else { g_devCount++;
devices = new log_device_t(optarg, binary);
} }
g_devCount++;
} }
break; break;
@ -885,22 +895,36 @@ int main(int argc, char **argv)
g_outputFileName = optarg; g_outputFileName = optarg;
break; break;
case 'r': case 'r': {
if (!getSizeTArg(optarg, &g_logRotateSizeKBytes, 1)) { std::string expanded = expand(optarg);
logcat_panic(true, "Invalid parameter %s to -r\n", optarg); if (!getSizeTArg(expanded.c_str(), &g_logRotateSizeKBytes, 1)) {
if (expanded.compare(optarg)) {
expanded += " expanded from ";
expanded += optarg;
}
logcat_panic(true, "Invalid parameter -r %s\n",
expanded.c_str());
} }
}
break; break;
case 'n': case 'n': {
if (!getSizeTArg(optarg, &g_maxRotatedLogs, 1)) { std::string expanded = expand(optarg);
logcat_panic(true, "Invalid parameter %s to -n\n", optarg); if (!getSizeTArg(expanded.c_str(), &g_maxRotatedLogs, 1)) {
if (expanded.compare(optarg)) {
expanded += " expanded from ";
expanded += optarg;
}
logcat_panic(true, "Invalid parameter -n %s\n",
expanded.c_str());
} }
}
break; break;
case 'v': case 'v':
err = setLogFormat (optarg); err = setLogFormat (optarg);
if (err < 0) { if (err < 0) {
logcat_panic(true, "Invalid parameter %s to -v\n", optarg); logcat_panic(true, "Invalid parameter -v %s\n", optarg);
} }
hasSetLogFormat |= err; hasSetLogFormat |= err;
break; break;

2
logcat/tests/Android.mk
View file

@ -56,6 +56,6 @@ include $(CLEAR_VARS)
LOCAL_MODULE := $(test_module_prefix)unit-tests LOCAL_MODULE := $(test_module_prefix)unit-tests
LOCAL_MODULE_TAGS := $(test_tags) LOCAL_MODULE_TAGS := $(test_tags)
LOCAL_CFLAGS += $(test_c_flags) LOCAL_CFLAGS += $(test_c_flags)
LOCAL_SHARED_LIBRARIES := liblog LOCAL_SHARED_LIBRARIES := liblog libcutils
LOCAL_SRC_FILES := $(test_src_files) LOCAL_SRC_FILES := $(test_src_files)
include $(BUILD_NATIVE_TEST) include $(BUILD_NATIVE_TEST)

73
logcat/tests/logcat_test.cpp
View file

@ -25,11 +25,14 @@
#include <memory> #include <memory>
#include <cutils/properties.h>
#include <gtest/gtest.h> #include <gtest/gtest.h>
#include <log/log.h> #include <log/log.h>
#include <log/logger.h> #include <log/logger.h>
#include <log/log_read.h> #include <log/log_read.h>
#define BIG_BUFFER (5 * 1024)
// enhanced version of LOG_FAILURE_RETRY to add support for EAGAIN and // enhanced version of LOG_FAILURE_RETRY to add support for EAGAIN and
// non-syscall libs. Since we are only using this in the emergency of // non-syscall libs. Since we are only using this in the emergency of
// a signal to stuff a terminating code into the logs, we will spin rather // a signal to stuff a terminating code into the logs, we will spin rather
@ -54,7 +57,7 @@ TEST(logcat, buckets) {
"logcat -b radio -b events -b system -b main -d 2>/dev/null", "logcat -b radio -b events -b system -b main -d 2>/dev/null",
"r"))); "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
int ids = 0; int ids = 0;
int count = 0; int count = 0;
@ -102,7 +105,7 @@ TEST(logcat, year) {
"logcat -v long -v year -b all -t 3 2>/dev/null", "logcat -v long -v year -b all -t 3 2>/dev/null",
"r"))); "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
int count = 0; int count = 0;
@ -165,7 +168,7 @@ TEST(logcat, tz) {
"logcat -v long -v America/Los_Angeles -b all -t 3 2>/dev/null", "logcat -v long -v America/Los_Angeles -b all -t 3 2>/dev/null",
"r"))); "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
count = 0; count = 0;
@ -189,7 +192,7 @@ TEST(logcat, ntz) {
"logcat -v long -v America/Los_Angeles -v zone -b all -t 3 2>/dev/null", "logcat -v long -v America/Los_Angeles -v zone -b all -t 3 2>/dev/null",
"r"))); "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
int count = 0; int count = 0;
@ -209,7 +212,7 @@ void do_tail(int num) {
int count; int count;
do { do {
char buffer[5120]; char buffer[BIG_BUFFER];
snprintf(buffer, sizeof(buffer), snprintf(buffer, sizeof(buffer),
"logcat -v long -b radio -b events -b system -b main -t %d 2>/dev/null", "logcat -v long -b radio -b events -b system -b main -t %d 2>/dev/null",
@ -252,7 +255,7 @@ TEST(logcat, tail_time) {
ASSERT_TRUE(NULL != (fp = popen("logcat -v long -b all -t 10 2>&1", "r"))); ASSERT_TRUE(NULL != (fp = popen("logcat -v long -b all -t 10 2>&1", "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
char *last_timestamp = NULL; char *last_timestamp = NULL;
char *first_timestamp = NULL; char *first_timestamp = NULL;
int count = 0; int count = 0;
@ -315,7 +318,7 @@ TEST(logcat, End_to_End) {
"logcat -v brief -b events -t 100 2>/dev/null", "logcat -v brief -b events -t 100 2>/dev/null",
"r"))); "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
int count = 0; int count = 0;
@ -339,15 +342,17 @@ TEST(logcat, End_to_End) {
ASSERT_EQ(1, count); ASSERT_EQ(1, count);
} }
TEST(logcat, get_size) { int get_groups(const char *cmd) {
FILE *fp; FILE *fp;
// NB: crash log only available in user space // NB: crash log only available in user space
ASSERT_TRUE(NULL != (fp = popen( EXPECT_TRUE(NULL != (fp = popen(cmd, "r")));
"logcat -v brief -b radio -b events -b system -b main -g 2>/dev/null",
"r")));
char buffer[5120]; if (fp == NULL) {
return 0;
}
char buffer[BIG_BUFFER];
int count = 0; int count = 0;
@ -407,7 +412,31 @@ TEST(logcat, get_size) {
pclose(fp); pclose(fp);
ASSERT_EQ(4, count); return count;
}
TEST(logcat, get_size) {
ASSERT_EQ(4, get_groups(
"logcat -v brief -b radio -b events -b system -b main -g 2>/dev/null"));
}
// duplicate test for get_size, but use comma-separated list of buffers
TEST(logcat, multiple_buffer) {
ASSERT_EQ(4, get_groups(
"logcat -v brief -b radio,events,system,main -g 2>/dev/null"));
}
// duplicate test for get_size, but use test.logcat.buffer property
TEST(logcat, property_expand) {
property_set("test.logcat.buffer", "radio,events");
EXPECT_EQ(4, get_groups(
"logcat -v brief -b 'system,${test.logcat.buffer:-bogo},main' -g 2>/dev/null"));
property_set("test.logcat.buffer", "");
}
TEST(logcat, bad_buffer) {
ASSERT_EQ(0, get_groups(
"logcat -v brief -b radio,events,bogo,system,main -g 2>/dev/null"));
} }
static void caught_blocking(int /*signum*/) static void caught_blocking(int /*signum*/)
@ -436,7 +465,7 @@ TEST(logcat, blocking) {
" logcat -v brief -b events 2>&1", " logcat -v brief -b events 2>&1",
"r"))); "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
int count = 0; int count = 0;
@ -505,7 +534,7 @@ TEST(logcat, blocking_tail) {
" logcat -v brief -b events -T 5 2>&1", " logcat -v brief -b events -T 5 2>&1",
"r"))); "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
int count = 0; int count = 0;
@ -568,7 +597,7 @@ TEST(logcat, logrotate) {
FILE *fp; FILE *fp;
EXPECT_TRUE(NULL != (fp = popen(command, "r"))); EXPECT_TRUE(NULL != (fp = popen(command, "r")));
if (fp) { if (fp) {
char buffer[5120]; char buffer[BIG_BUFFER];
int count = 0; int count = 0;
while (fgets(buffer, sizeof(buffer), fp)) { while (fgets(buffer, sizeof(buffer), fp)) {
@ -611,7 +640,7 @@ TEST(logcat, logrotate_suffix) {
FILE *fp; FILE *fp;
EXPECT_TRUE(NULL != (fp = popen(command, "r"))); EXPECT_TRUE(NULL != (fp = popen(command, "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
int log_file_count = 0; int log_file_count = 0;
while (fgets(buffer, sizeof(buffer), fp)) { while (fgets(buffer, sizeof(buffer), fp)) {
@ -784,7 +813,7 @@ TEST(logcat, blocking_clear) {
" logcat -v brief -b events 2>&1", " logcat -v brief -b events 2>&1",
"r"))); "r")));
char buffer[5120]; char buffer[BIG_BUFFER];
int count = 0; int count = 0;
@ -845,7 +874,7 @@ static bool get_white_black(char **list) {
return false; return false;
} }
char buffer[5120]; char buffer[BIG_BUFFER];
while (fgets(buffer, sizeof(buffer), fp)) { while (fgets(buffer, sizeof(buffer), fp)) {
char *hold = *list; char *hold = *list;
@ -874,7 +903,7 @@ static bool get_white_black(char **list) {
static bool set_white_black(const char *list) { static bool set_white_black(const char *list) {
FILE *fp; FILE *fp;
char buffer[5120]; char buffer[BIG_BUFFER];
snprintf(buffer, sizeof(buffer), "logcat -P '%s' 2>&1", list ? list : ""); snprintf(buffer, sizeof(buffer), "logcat -P '%s' 2>&1", list ? list : "");
fp = popen(buffer, "r"); fp = popen(buffer, "r");
@ -936,7 +965,7 @@ TEST(logcat, regex) {
FILE *fp; FILE *fp;
int count = 0; int count = 0;
char buffer[5120]; char buffer[BIG_BUFFER];
snprintf(buffer, sizeof(buffer), "logcat --pid %d -d -e logcat_test_a+b", getpid()); snprintf(buffer, sizeof(buffer), "logcat --pid %d -d -e logcat_test_a+b", getpid());
@ -969,7 +998,7 @@ TEST(logcat, maxcount) {
FILE *fp; FILE *fp;
int count = 0; int count = 0;
char buffer[5120]; char buffer[BIG_BUFFER];
snprintf(buffer, sizeof(buffer), "logcat --pid %d -d --max-count 3", getpid()); snprintf(buffer, sizeof(buffer), "logcat --pid %d -d --max-count 3", getpid());