*
* syslogger.cpp
*
* The system logger (syslogger) appeared in Postgres 8.0. It catches all
* stderr output from the postmaster, backends, and other subprocesses
* by redirecting to a pipe, and writes it to a set of logfiles.
* It's possible to have size and age limits for the logfile configured
* in postgresql.conf. If these limits are reached or passed, the
* current logfile is closed and a new one is created (rotated).
* The logfiles are stored in a subdirectory (configurable in
* postgresql.conf), using a user-selectable naming scheme.
*
* Author: Andreas Pflug <pgadmin@pse-consulting.de>
*
* Portions Copyright (c) 2020 Huawei Technologies Co.,Ltd.
* Copyright (c) 2004-2012, PostgreSQL Global Development Group
*
*
* IDENTIFICATION
* src/gausskernel/process/postmaster/syslogger.cpp
*
* -------------------------------------------------------------------------
*/
#include "postgres.h"
#include "knl/knl_variable.h"
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "lib/stringinfo.h"
#include "libpq/pqsignal.h"
#include "miscadmin.h"
#include "nodes/pg_list.h"
#include "pgtime.h"
#include "postmaster/fork_process.h"
#include "postmaster/postmaster.h"
#include "postmaster/syslogger.h"
#include "storage/ipc.h"
#include "storage/latch.h"
#include "storage/pg_shmem.h"
#include "storage/smgr/fd.h"
#include "utils/guc.h"
#include "utils/ps_status.h"
#include "utils/timestamp.h"
#include "gssignal/gs_signal.h"
#define PROFILE_LOG_ROTATE_SIZE ((long)20 * 1024 * 1024L)
#define LOG_SIZE_INIT (1024L * INT_MAX + 1)
#define LOG_MAX_SIZE (u_sess->attr.attr_common.LogMaxSize * 1024L)
#define NEED_ELIMINATE_LOG(total) (total > LOG_MAX_SIZE && LOG_MAX_SIZE > 0)
* We really want line-buffered mode for logfile output, but Windows does
* not have it, and interprets _IOLBF as _IOFBF (bozos). So use _IONBF
* instead on Windows.
*/
#ifdef WIN32
#define LBF_MODE _IONBF
#else
#define LBF_MODE _IOLBF
#endif
* We read() into a temp buffer twice as big as a chunk, so that any fragment
* left after processing can be moved down to the front and we'll still have
* room to read a full chunk.
*/
#define READ_BUF_SIZE (2 * LOGPIPE_CHUNK_SIZE)
#define ERROR_BUF_SIZE 1024
static char logCtlTimeZone[TZ_STRLEN_MAX + 1] = {0};
static char logCtlHostName[LOG_MAX_NODENAME_LEN] = {0};
static char logCtlNodeName[LOG_MAX_NODENAME_LEN] = {0};
static LogControlData* allLogCtl[LOG_TYPE_MAXVALID + 1] = {
NULL,
NULL,
NULL,
NULL,
NULL
};
#define foreach_logctl(_logctl) for (int i = LOG_TYPE_ELOG + 1; ((_logctl) = allLogCtl[i]) != NULL; ++i)
* Buffers for saving partial messages from different backends.
*
* Keep NBUFFER_LISTS lists of these, with the entry for a given source pid
* being in the list numbered (pid % NBUFFER_LISTS), so as to cut down on
* the number of entries we have to examine for any one incoming message.
* There must never be more than one entry for the same source pid.
*
* An inactive buffer is not removed from its list, just held for re-use.
* An inactive buffer has pid == 0 and undefined contents of data.
*/
typedef struct {
ThreadId pid;
StringInfoData data;
} save_buffer;
typedef int (*cmp_func)(const void*, const void*);
typedef struct {
int64 fileSize;
time_t mTime;
time_t cTime;
char fileName[FLEXIBLE_ARRAY_MEMBER];
} LogInfo;
#ifndef WIN32
#else
HANDLE syslogPipe[2] = {0, 0};
#endif
#ifdef WIN32
static HANDLE threadHandle = 0;
static CRITICAL_SECTION sysloggerSection;
#endif
* Flags set by interrupt handlers for later service in the main loop.
*/
static void syslogger_setfd(int fd);
static void process_pipe_input(char* logbuffer, int* bytes_in_logbuffer);
static void flush_pipe_input(char* logbuffer, int* bytes_in_logbuffer);
static void open_csvlogfile(void);
#ifdef ENABLE_UT
#define static
#endif
static FILE* logfile_open(const char* filename, const char* mode, bool allow_errors);
#if defined(ENABLE_UT) && defined(static)
#undef static
#endif
#ifdef WIN32
static unsigned int __stdcall pipeThread(void* arg);
#endif
static void logfile_rotate(bool time_based_rotation, int size_rotation_for, bool time_span_variation);
static char* logfile_getname(pg_time_t timestamp, const char* suffix, const char* logdir, const char* filename);
static void set_next_rotation_time(void);
static void sigHupHandler(SIGNAL_ARGS);
static void sigUsr1Handler(SIGNAL_ARGS);
static void LogCtlSetGlobalNames(void);
static void LogCtlSetTimeZone(void);
static char* LogCtlGetLogDirectory(const char* logid, bool include_nodename);
static void LogCtlCreateLogParentDirectory(void);
static void LogCtlWriteFileHeader(LogControlData* logctl);
static void LogCtlRotateLogFileIfNeeded(LogControlData*, bool);
static void LogCtlFlushBuf(LogControlData* logctl);
static char* LogCtlGetFilenamePattern(const char* post_suffix);
static void LogCtlProcessInput(LogControlData* logctl, const char* msg, int len);
static void PLogCtlInit(void);
static void slow_query_logfile_rotate(bool time_based_rotation, int size_rotation_for);
static void asp_logfile_rotate(bool time_based_rotation, int size_rotation_for);
static void RemoveOldestLog(const char* path, int64* totalSize, int64 curSize);
static int LogInfoCmp(const void* v1, const void* v2);
static void MakeSortedLogInfoList(List* list, cmp_func cmp);
static inline int64 GetUpdateSize(FILE* fh, const char* filename);
static inline void CheckTotalLogSize(FILE* fh, bool hasCsvFormat, char* currentLogDir, int64* totalSize);
static void RotateLogFile(int& sizeRotationFor);
* Main entry point for syslogger process
* argc/argv parameters are valid only in EXEC_BACKEND case.
*/
NON_EXEC_STATIC void SysLoggerMain(int fd)
{
#ifndef WIN32
char logbuffer[READ_BUF_SIZE];
int bytes_in_logbuffer = 0;
#endif
LogControlData* logctl = NULL;
char* currentLogDir = NULL;
char* currentLogFilename = NULL;
int currentLogRotationAge;
pg_time_t now;
DISABLE_MEMORY_PROTECT();
IsUnderPostmaster = true;
t_thrd.proc_cxt.MyProcPid = gs_thread_self();
t_thrd.proc_cxt.MyStartTime = time(NULL);
now = t_thrd.proc_cxt.MyStartTime;
t_thrd.proc_cxt.MyProgName = "syslogger";
t_thrd.myLogicTid = noProcLogicTid + SYSLOGGER_LID;
syslogger_setfd(fd);
t_thrd.role = SYSLOGGER;
init_ps_display("logger process", "", "", "");
* Syslogger's own stderr can't be the syslogPipe, so set it back to text
* mode if we didn't just close it. (It was set to binary in
* SubPostmasterMain).
*/
#ifdef WIN32
else
_setmode(_fileno(stderr), _O_TEXT);
#endif
* Also close our copy of the write end of the pipe. This is needed to
* ensure we can detect pipe EOF correctly. (But note that in the restart
* case, the postmaster already did this.)
*/
#ifndef WIN32
t_thrd.postmaster_cxt.syslogPipe[1] = -1;
#else
syslogPipe[1] = 0;
#endif
InitializeLatchSupport();
InitLatch(&t_thrd.logger.sysLoggerLatch);
* Properly accept or ignore signals the postmaster might send us
*
* Note: we ignore all termination signals, and instead exit only when all
* upstream processes are gone, to ensure we don't miss any dying gasps of
* broken backends...
*/
* Reset some signals that are accepted by postmaster but not here
*/
(void)gspqsignal(SIGHUP, sigHupHandler);
(void)gspqsignal(SIGINT, SIG_IGN);
(void)gspqsignal(SIGTERM, SIG_IGN);
(void)gspqsignal(SIGQUIT, SIG_IGN);
(void)gspqsignal(SIGALRM, SIG_IGN);
(void)gspqsignal(SIGPIPE, SIG_IGN);
(void)gspqsignal(SIGUSR1, sigUsr1Handler);
(void)gspqsignal(SIGUSR2, SIG_IGN);
(void)gspqsignal(SIGURG, print_stack);
* Reset some signals that are accepted by postmaster but not here
*/
(void)gspqsignal(SIGCHLD, SIG_DFL);
(void)gspqsignal(SIGTTIN, SIG_DFL);
(void)gspqsignal(SIGTTOU, SIG_DFL);
(void)gspqsignal(SIGCONT, SIG_DFL);
(void)gspqsignal(SIGWINCH, SIG_DFL);
gs_signal_setmask(&t_thrd.libpq_cxt.UnBlockSig, NULL);
(void)gs_signal_unblock_sigusr2();
#ifdef WIN32
InitializeCriticalSection(&sysloggerSection);
EnterCriticalSection(&sysloggerSection);
threadHandle = (HANDLE)_beginthreadex(NULL, 0, pipeThread, NULL, 0, NULL);
if (threadHandle == 0)
ereport(FATAL, (errmsg("could not create syslogger data transfer thread: %m")));
#endif
PLogCtlInit();
if (g_instance.attr.attr_common.query_log_directory == NULL) {
init_instr_log_directory(true, SLOWQUERY_LOG_TAG);
} else {
(void)pg_mkdir_p(g_instance.attr.attr_common.query_log_directory, S_IRWXU);
}
if (g_instance.attr.attr_common.asp_log_directory == NULL) {
init_instr_log_directory(true, ASP_LOG_TAG);
} else {
(void)pg_mkdir_p(g_instance.attr.attr_common.asp_log_directory, S_IRWXU);
}
* Remember active logfile's name. We recompute this from the reference
* time because passing down just the pg_time_t is a lot cheaper than
* passing a whole file path in the EXEC_BACKEND case.
*/
t_thrd.logger.last_file_name = logfile_getname(t_thrd.logger.first_syslogger_file_time,
NULL,
u_sess->attr.attr_common.Log_directory,
u_sess->attr.attr_common.Log_filename);
t_thrd.logger.syslogFile = logfile_open(t_thrd.logger.last_file_name, "a", false);
foreach_logctl(logctl) {
* fd leaking maybe happens when syslogger thread is
* restarted repeated by postmaster thread if exception occurs.
* maybe include switch over case.
* if the thread restarted, the original memory context must be deleted and need not free the memory
*/
logctl->now_file_name =
logfile_getname(t_thrd.logger.first_syslogger_file_time, NULL, logctl->log_dir, logctl->filename_pattern);
if (logctl->now_file_fd != NULL) {
(void)fclose(logctl->now_file_fd);
logctl->now_file_fd = NULL;
}
logctl->now_file_fd = logfile_open(logctl->now_file_name, "a", false);
LogCtlWriteFileHeader(logctl);
}
currentLogDir = pstrdup(u_sess->attr.attr_common.Log_directory);
currentLogFilename = pstrdup(u_sess->attr.attr_common.Log_filename);
currentLogRotationAge = u_sess->attr.attr_common.Log_RotationAge;
* Set it to 1 more than the maximum possible LOG_MAX_SIZE to ensure that the initial value can stably trigger
* the RemoveOldestLog. In the RemoveOldestLog, the size of the latest log folder is obtained by traversing
* the log file.
*/
t_thrd.logger.total_syslogs_size = LOG_SIZE_INIT;
set_next_rotation_time();
for (;;) {
bool time_based_rotation = false;
bool time_span_variation = false;
int size_rotation_for = 0;
long cur_timeout;
int cur_flags;
#ifndef WIN32
int rc;
#endif
ResetLatch(&t_thrd.logger.sysLoggerLatch);
* Process any requests or signals received recently.
*/
if (t_thrd.worker_sig_flags.got_SIGHUP) {
t_thrd.worker_sig_flags.got_SIGHUP = false;
ProcessConfigFile(PGC_SIGHUP);
* Check if the log directory or filename pattern changed in
* postgresql.conf. If so, force rotation to make sure we're
* writing the logfiles in the right place.
*/
if (strcmp(u_sess->attr.attr_common.Log_directory, currentLogDir) != 0) {
pfree(currentLogDir);
currentLogDir = pstrdup(u_sess->attr.attr_common.Log_directory);
t_thrd.logger.total_syslogs_size = LOG_SIZE_INIT;
t_thrd.logger.rotation_requested = true;
* Also, create new directory if not present; ignore errors
*/
mkdir(u_sess->attr.attr_common.Log_directory, S_IRWXU);
}
if (strcmp(u_sess->attr.attr_common.Log_filename, currentLogFilename) != 0) {
pfree(currentLogFilename);
currentLogFilename = pstrdup(u_sess->attr.attr_common.Log_filename);
t_thrd.logger.rotation_requested = true;
foreach_logctl(logctl) {
if (logctl->filename_pattern != NULL) {
pfree_ext(logctl->filename_pattern);
}
logctl->filename_pattern = LogCtlGetFilenamePattern(logctl->file_suffix);
logctl->rotation_requested = true;
}
}
* If rotation time parameter changed, reset next rotation time,
* but don't immediately force a rotation.
*/
if (currentLogRotationAge != u_sess->attr.attr_common.Log_RotationAge) {
currentLogRotationAge = u_sess->attr.attr_common.Log_RotationAge;
set_next_rotation_time();
}
* If we had a rotation-disabling failure, re-enable rotation
* attempts after SIGHUP, and force one immediately.
*/
if (t_thrd.logger.rotation_disabled) {
t_thrd.logger.rotation_disabled = false;
t_thrd.logger.rotation_requested = true;
foreach_logctl(logctl) {
logctl->rotation_requested = true;
}
}
}
if (u_sess->attr.attr_common.Log_RotationAge > 0 && !t_thrd.logger.rotation_disabled) {
now = (pg_time_t)time(NULL);
if (now >= t_thrd.logger.next_rotation_time) {
t_thrd.logger.rotation_requested = time_based_rotation = true;
if (now - t_thrd.logger.next_rotation_time >=
u_sess->attr.attr_common.Log_RotationAge * SECS_PER_MINUTE) {
time_span_variation = true;
}
foreach_logctl(logctl) {
logctl->rotation_requested = true;
}
} else if (t_thrd.logger.next_rotation_time - now >=
u_sess->attr.attr_common.Log_RotationAge * SECS_PER_MINUTE) {
t_thrd.logger.rotation_requested = time_based_rotation = true;
time_span_variation = true;
foreach_logctl(logctl) {
logctl->rotation_requested = true;
}
}
}
if (!t_thrd.logger.rotation_requested && u_sess->attr.attr_common.Log_RotationSize > 0 &&
!t_thrd.logger.rotation_disabled) {
if (ftell(t_thrd.logger.syslogFile) >= u_sess->attr.attr_common.Log_RotationSize * 1024L) {
t_thrd.logger.rotation_requested = true;
size_rotation_for |= LOG_DESTINATION_STDERR;
}
if (t_thrd.logger.csvlogFile != NULL &&
ftell(t_thrd.logger.csvlogFile) >= u_sess->attr.attr_common.Log_RotationSize * 1024L) {
t_thrd.logger.rotation_requested = true;
size_rotation_for |= LOG_DESTINATION_CSVLOG;
}
if (t_thrd.logger.querylogFile != NULL &&
ftell(t_thrd.logger.querylogFile) >= u_sess->attr.attr_common.Log_RotationSize * 1024L) {
t_thrd.logger.rotation_requested = true;
size_rotation_for |= LOG_DESTINATION_QUERYLOG;
}
if (t_thrd.logger.asplogFile != NULL &&
ftell(t_thrd.logger.asplogFile) >= u_sess->attr.attr_common.Log_RotationSize * 1024L) {
t_thrd.logger.rotation_requested = true;
size_rotation_for |= LOG_DESTINATION_ASPLOG;
}
}
if (LOG_MAX_SIZE > 0) {
CheckTotalLogSize(t_thrd.logger.syslogFile,
true,
currentLogDir,
&t_thrd.logger.total_syslogs_size);
RotateLogFile(size_rotation_for);
}
* check the other log types' file rotation before error log type.
* logfile_rotate() will change t_thrd.logger.next_rotation_time value by calling
* set_next_rotation_time().
*/
foreach_logctl(logctl) {
LogCtlRotateLogFileIfNeeded(logctl, time_based_rotation);
}
if (t_thrd.logger.rotation_requested) {
* Force rotation when both values are zero. It means the request
* was sent by pg_rotate_logfile.
*/
if (!time_based_rotation && size_rotation_for == 0)
size_rotation_for = LOG_DESTINATION_STDERR | LOG_DESTINATION_CSVLOG |
LOG_DESTINATION_QUERYLOG | LOG_DESTINATION_ASPLOG;
asp_logfile_rotate(time_based_rotation, size_rotation_for);
slow_query_logfile_rotate(time_based_rotation, size_rotation_for);
logfile_rotate(time_based_rotation, size_rotation_for, time_span_variation);
}
* Calculate time till next time-based rotation, so that we don't
* sleep longer than that. We assume the value of "now" obtained
* above is still close enough. Note we can't make this calculation
* until after calling logfile_rotate(), since it will advance
* t_thrd.logger.next_rotation_time.
*
* Also note that we need to beware of overflow in calculation of the
* timeout: with large settings of Log_RotationAge, t_thrd.logger.next_rotation_time
* could be more than INT_MAX msec in the future. In that case we'll
* wait no more than INT_MAX msec, and try again.
*/
if (u_sess->attr.attr_common.Log_RotationAge > 0 && !t_thrd.logger.rotation_disabled) {
pg_time_t delay;
delay = t_thrd.logger.next_rotation_time - now;
if (delay > 0) {
if (delay > INT_MAX / 1000)
delay = INT_MAX / 1000;
cur_timeout = delay * 1000L;
} else
cur_timeout = 0;
cur_flags = WL_TIMEOUT;
} else {
cur_timeout = -1L;
cur_flags = 0;
}
* Sleep until there's something to do
*/
#ifndef WIN32
rc = WaitLatchOrSocket(&t_thrd.logger.sysLoggerLatch,
WL_LATCH_SET | WL_SOCKET_READABLE | cur_flags,
t_thrd.postmaster_cxt.syslogPipe[0],
cur_timeout);
if (rc & WL_SOCKET_READABLE) {
int bytesRead;
bytesRead = read(t_thrd.postmaster_cxt.syslogPipe[0],
logbuffer + bytes_in_logbuffer,
sizeof(logbuffer) - bytes_in_logbuffer);
if (bytesRead < 0) {
if (errno != EINTR)
ereport(LOG, (errcode_for_socket_access(), errmsg("could not read from logger pipe: %m")));
} else if (bytesRead > 0) {
bytes_in_logbuffer += bytesRead;
process_pipe_input(logbuffer, &bytes_in_logbuffer);
continue;
} else {
* ELSE branch is never executed forever in multi-thread mode
*
* Zero bytes read when select() is saying read-ready means
* EOF on the pipe: that is, there are no longer any processes
* with the pipe write end open. Therefore, the postmaster
* and all backends are shut down, and we are done.
*/
t_thrd.logger.pipe_eof_seen = true;
flush_pipe_input(logbuffer, &bytes_in_logbuffer);
}
}
#else
* On Windows we leave it to a separate thread to transfer data and
* detect pipe EOF. The main thread just wakes up to handle SIGHUP
* and rotation conditions.
*
* Server code isn't generally thread-safe, so we ensure that only one
* of the threads is active at a time by entering the critical section
* whenever we're not sleeping.
*/
LeaveCriticalSection(&sysloggerSection);
(void)WaitLatch(&t_thrd.logger.sysLoggerLatch, WL_LATCH_SET | cur_flags, cur_timeout);
EnterCriticalSection(&sysloggerSection);
#endif
if (t_thrd.logger.pipe_eof_seen) {
* seeing this message on the real stderr is annoying - so we make
* it DEBUG1 to suppress in normal use.
*/
ereport(DEBUG1, (errmsg("logger shutting down")));
* Normal exit from the syslogger is here. Note that we
* deliberately do not close t_thrd.logger.syslogFile before exiting; this is to
* allow for the possibility of elog messages being generated
* inside proc_exit. Regular exit() will take care of flushing
* and closing stdio channels.
*/
proc_exit(0);
}
}
}
* Postmaster subroutine to start a syslogger subprocess.
*/
ThreadId SysLogger_Start(void)
{
ThreadId sysloggerPid;
char* filename = NULL;
if (!g_instance.attr.attr_common.Logging_collector)
return 0;
* If first time through, create the pipe which will receive stderr
* output.
*
* If the syslogger crashes and needs to be restarted, we continue to use
* the same pipe (indeed must do so, since extant backends will be writing
* into that pipe).
*
* This means the postmaster must continue to hold the read end of the
* pipe open, so we can pass it down to the reincarnated syslogger. This
* is a bit klugy but we have little choice.
*/
#ifndef WIN32
if (t_thrd.postmaster_cxt.syslogPipe[0] < 0) {
if (pipe(t_thrd.postmaster_cxt.syslogPipe) < 0)
ereport(FATAL, (errcode_for_socket_access(), (errmsg("could not create pipe for syslog: %m"))));
}
#else
if (!t_thrd.postmaster_cxt.syslogPipe[0]) {
SECURITY_ATTRIBUTES sa;
errno_t rc = memset_s(&sa, sizeof(SECURITY_ATTRIBUTES), 0, sizeof(SECURITY_ATTRIBUTES));
securec_check_c(rc, "\0", "\0");
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.bInheritHandle = TRUE;
if (!CreatePipe(&t_thrd.postmaster_cxt.syslogPipe[0], &t_thrd.postmaster_cxt.syslogPipe[1], &sa, 32768))
ereport(FATAL, (errcode_for_file_access(), (errmsg("could not create pipe for syslog: %m"))));
}
#endif
* Create log directory if not present; ignore errors
*/
(void)pg_mkdir_p(u_sess->attr.attr_common.Log_directory, S_IRWXU);
LogCtlCreateLogParentDirectory();
LogCtlSetGlobalNames();
LogCtlSetTimeZone();
* The initial logfile is created right in the postmaster, to verify that
* the Log_directory is writable. We save the reference time so that
* the syslogger child process can recompute this file name.
*
* It might look a bit strange to re-do this during a syslogger restart,
* but we must do so since the postmaster closed t_thrd.logger.syslogFile after the
* previous fork (and remembering that old file wouldn't be right anyway).
* Note we always append here, we won't overwrite any existing file. This
* is consistent with the normal rules, because by definition this is not
* a time-based rotation.
*/
t_thrd.logger.first_syslogger_file_time = time(NULL);
filename = logfile_getname(t_thrd.logger.first_syslogger_file_time,
NULL,
u_sess->attr.attr_common.Log_directory,
u_sess->attr.attr_common.Log_filename);
pfree(filename);
sysloggerPid = initialize_util_thread(SYSLOGGER);
if (sysloggerPid != 0) {
if (!t_thrd.postmaster_cxt.redirection_done) {
#ifndef WIN32
fflush(stdout);
if (dup2(t_thrd.postmaster_cxt.syslogPipe[1], fileno(stdout)) < 0)
ereport(FATAL, (errcode_for_file_access(), errmsg("could not redirect stdout: %m")));
fflush(stderr);
if (dup2(t_thrd.postmaster_cxt.syslogPipe[1], fileno(stderr)) < 0)
ereport(FATAL, (errcode_for_file_access(), errmsg("could not redirect stderr: %m")));
close(t_thrd.postmaster_cxt.syslogPipe[1]);
t_thrd.postmaster_cxt.syslogPipe[1] = -1;
#else
int fd;
* open the pipe in binary mode and make sure stderr is binary
* after it's been dup'ed into, to avoid disturbing the pipe
* chunking protocol.
*/
fflush(stderr);
fd = _open_osfhandle((intptr_t)t_thrd.postmaster_cxt.syslogPipe[1], _O_APPEND | _O_BINARY);
if (dup2(fd, _fileno(stderr)) < 0)
ereport(FATAL, (errcode_for_file_access(), errmsg("could not redirect stderr: %m")));
close(fd);
_setmode(_fileno(stderr), _O_BINARY);
* Now we are done with the write end of the pipe.
* CloseHandle() must not be called because the preceding
* close() closes the underlying handle.
*/
t_thrd.postmaster_cxt.syslogPipe[1] = 0;
#endif
t_thrd.postmaster_cxt.redirection_done = true;
}
t_thrd.logger.syslogFile = NULL;
return sysloggerPid;
}
return 0;
}
void SysLoggerClose(void)
{
if (t_thrd.logger.syslogFile) {
fclose(t_thrd.logger.syslogFile);
t_thrd.logger.syslogFile = NULL;
}
}
#ifdef EXEC_BACKEND
* syslogger_ereprint() -
*
* print error in syslogger thread
*/
static void syslogger_erewrite(FILE* file, const char* buffer)
{
int tryTimes = 0;
for (;;) {
errno = 0;
int buffer_len = (int)strlen(buffer);
int rc = fwrite(buffer, 1, buffer_len, file);
if ((errno != 0) || (rc != buffer_len)) {
tryTimes++;
if (tryTimes >= 3)
break;
* if no disk space, we will retry,
* and we can not report a log, because there is not space to write.
*/
if (errno == ENOSPC) {
break;
}
}
break;
}
}
* syslogger_setfd() -
*
* Extract data from the arglist for exec'ed syslogger process
*/
static void syslogger_setfd(int fd)
{
if (fd != -1) {
t_thrd.logger.syslogFile = fdopen(fd, "a");
if (t_thrd.logger.syslogFile == NULL) {
ereport(ERROR, (errcode_for_file_access(), errmsg("syslogger could not open file %d: %m,exit\n", fd)));
proc_exit(1);
}
setvbuf(t_thrd.logger.syslogFile, NULL, LBF_MODE, 0);
}
}
#endif
* CheckPipeProtoHeader() -
*
* check whether p has the features of a LogPipeProtoHeader
*/
static bool CheckPipeProtoHeader(const LogPipeProtoHeader p)
{
if (p.nuls[0] == '\0' && p.nuls[1] == '\0' && p.len > 0 &&
p.len <= LOGPIPE_MAX_PAYLOAD && p.pid != 0 &&
(p.is_last == 't' || p.is_last == 'f' || p.is_last == 'T' || p.is_last == 'F') &&
p.logtype >= LOG_TYPE_ELOG && p.logtype < LOG_TYPE_MAXVALID &&
p.magic == PROTO_HEADER_MAGICNUM)
return true;
return false;
}
* pipe protocol handling
* --------------------------------
*/
* Process data received through the syslogger pipe.
*
* This routine interprets the log pipe protocol which sends log messages as
* (hopefully atomic) chunks - such chunks are detected and reassembled here.
*
* The protocol has a header that starts with two nul bytes, then has a 16 bit
* length, the pid of the sending process, and a flag to indicate if it is
* the last chunk in a message. Incomplete chunks are saved until we read some
* more, and non-final chunks are accumulated until we get the final chunk.
*
* All of this is to avoid 2 problems:
* . partial messages being written to logfiles (messes rotation), and
* . messages from different backends being interleaved (messages garbled).
*
* Any non-protocol messages are written out directly. These should only come
* from non-PostgreSQL sources, however (e.g. third party libraries writing to
* stderr).
*
* logbuffer is the data input buffer, and *bytes_in_logbuffer is the number
* of bytes present. On exit, any not-yet-eaten data is left-justified in
* logbuffer, and *bytes_in_logbuffer is updated.
*/
static void process_pipe_input(char* logbuffer, int* bytes_in_logbuffer)
{
char* cursor = logbuffer;
int count = *bytes_in_logbuffer;
int dest = LOG_DESTINATION_STDERR;
while (count >= (int)sizeof(LogPipeProtoHeader)) {
LogPipeProtoHeader p;
int chunklen;
errno_t rcs = memcpy_s(&p, sizeof(LogPipeProtoHeader), cursor, sizeof(LogPipeProtoHeader));
securec_check(rcs, "\0", "\0");
if (CheckPipeProtoHeader(p) == true) {
List* buffer_list = NULL;
ListCell* cell = NULL;
save_buffer* existing_slot = NULL;
save_buffer* free_slot = NULL;
StringInfo str;
chunklen = LOGPIPE_HEADER_SIZE + p.len;
if (count < chunklen)
break;
if (p.logtype == LOG_TYPE_ELOG || p.logtype == LOG_TYPE_PLAN_LOG || p.logtype == LOG_TYPE_ASP_LOG) {
if (p.logtype == LOG_TYPE_PLAN_LOG)
dest = LOG_DESTINATION_QUERYLOG;
else if (p.logtype == LOG_TYPE_ASP_LOG)
dest = LOG_DESTINATION_ASPLOG;
else
dest = (p.is_last == 'T' || p.is_last == 'F') ? LOG_DESTINATION_CSVLOG : LOG_DESTINATION_STDERR;
buffer_list = t_thrd.logger.logger_cold->buffer_lists[p.pid % NBUFFER_LISTS];
foreach (cell, buffer_list) {
save_buffer* buf = (save_buffer*)lfirst(cell);
if (buf->pid == p.pid) {
existing_slot = buf;
break;
}
if (buf->pid == 0 && free_slot == NULL)
free_slot = buf;
}
if (p.is_last == 'f' || p.is_last == 'F') {
* Save a complete non-final chunk in a per-pid buffer
*/
if (existing_slot != NULL) {
str = &(existing_slot->data);
appendBinaryStringInfo(str, cursor + LOGPIPE_HEADER_SIZE, p.len);
} else {
if (free_slot == NULL) {
* Need a free slot, but there isn't one in the list,
* so create a new one and extend the list with it.
*/
free_slot = (save_buffer*)palloc(sizeof(save_buffer));
buffer_list = lappend(buffer_list, free_slot);
t_thrd.logger.logger_cold->buffer_lists[p.pid % NBUFFER_LISTS] = buffer_list;
}
free_slot->pid = p.pid;
str = &(free_slot->data);
initStringInfo(str);
appendBinaryStringInfo(str, cursor + LOGPIPE_HEADER_SIZE, p.len);
}
} else {
* Final chunk --- add it to anything saved for that pid, and
* either way write the whole thing out.
*/
if (existing_slot != NULL) {
str = &(existing_slot->data);
appendBinaryStringInfo(str, cursor + LOGPIPE_HEADER_SIZE, p.len);
write_syslogger_file(str->data, str->len, dest);
existing_slot->pid = 0;
pfree(str->data);
} else {
write_syslogger_file(cursor + LOGPIPE_HEADER_SIZE, p.len, dest);
}
}
} else if (p.logtype < LOG_TYPE_MAXVALID) {
Assert(LOG_TYPE_MAXVALID <= LOG_TYPE_UPLIMIT);
LogCtlProcessInput(allLogCtl[(int)p.logtype], cursor + LOGPIPE_HEADER_SIZE, p.len);
} else {
Assert(0);
}
cursor += chunklen;
count -= chunklen;
} else {
* Look for the start of a protocol header. If found, dump data
* up to there and repeat the loop. Otherwise, dump it all and
* fall out of the loop. (Note: we want to dump it all if at all
* possible, so as to avoid dividing non-protocol messages across
* logfiles. We expect that in many scenarios, a non-protocol
* message will arrive all in one read(), and we want to respect
* the read() boundary if possible.)
*/
for (chunklen = 1; chunklen < count; chunklen++) {
if (cursor[chunklen] == '\0')
break;
}
write_syslogger_file(cursor, chunklen, LOG_DESTINATION_STDERR);
cursor += chunklen;
count -= chunklen;
}
}
if (count > 0 && cursor != logbuffer) {
errno_t rc = memmove_s(logbuffer, count, cursor, count);
securec_check_c(rc, "\0", "\0");
}
*bytes_in_logbuffer = count;
}
* Force out any buffered data
*
* This is currently used only at syslogger shutdown, but could perhaps be
* useful at other times, so it is careful to leave things in a clean state.
*/
static void flush_pipe_input(char* logbuffer, int* bytes_in_logbuffer)
{
int i;
for (i = 0; i < NBUFFER_LISTS; i++) {
List* list = t_thrd.logger.logger_cold->buffer_lists[i];
ListCell* cell = NULL;
foreach (cell, list) {
save_buffer* buf = (save_buffer*)lfirst(cell);
if (buf->pid != 0) {
StringInfo str = &(buf->data);
write_syslogger_file(str->data, str->len, LOG_DESTINATION_STDERR);
buf->pid = 0;
pfree(str->data);
}
}
}
* Force out any remaining pipe data as-is; we don't bother trying to
* remove any protocol headers that may exist in it.
*/
if (*bytes_in_logbuffer > 0)
write_syslogger_file(logbuffer, *bytes_in_logbuffer, LOG_DESTINATION_STDERR);
*bytes_in_logbuffer = 0;
}
* logfile routines
* --------------------------------
*/
* Write text to the currently open logfile
*
* This is exported so that elog.c can call it when am_syslogger is true.
* This allows the syslogger process to record elog messages of its own,
* even though its stderr does not point at the syslog pipe.
*/
void write_syslogger_file(char* buffer, int count, int destination)
{
int rc;
FILE* logfile = NULL;
bool doOpen = false;
if (destination == LOG_DESTINATION_CSVLOG && t_thrd.logger.csvlogFile == NULL)
open_csvlogfile();
if (destination == LOG_DESTINATION_QUERYLOG)
logfile = (FILE *)SQMOpenLogFile(&doOpen);
else if (destination == LOG_DESTINATION_ASPLOG)
logfile = (FILE *)ASPOpenLogFile(&doOpen);
else
logfile = (destination == LOG_DESTINATION_CSVLOG) ? t_thrd.logger.csvlogFile : t_thrd.logger.syslogFile;
errno = 0;
rc = fwrite(buffer, 1, count, logfile);
if (rc != count) {
* if no disk space, we will retry,
* and we can not report a log, because there is not space to write.
*/
if (errno == ENOSPC) {
return;
}
char errorbuf[ERROR_BUF_SIZE] = {'\0'};
rc = sprintf_s(errorbuf, ERROR_BUF_SIZE, "ERROR: could not write to log file: %s\n", gs_strerror(errno));
securec_check_ss_c(rc, "\0", "\0");
syslogger_erewrite(logfile, errorbuf);
}
}
#ifdef WIN32
* Worker thread to transfer data from the pipe to the current logfile.
*
* We need this because on Windows, WaitforMultipleObjects does not work on
* unnamed pipes: it always reports "signaled", so the blocking ReadFile won't
* allow for SIGHUP; and select is for sockets only.
*/
static unsigned int __stdcall pipeThread(void* arg)
{
char logbuffer[READ_BUF_SIZE];
int bytes_in_logbuffer = 0;
for (;;) {
DWORD bytesRead;
BOOL result = false;
result = ReadFile(t_thrd.postmaster_cxt.syslogPipe[0],
logbuffer + bytes_in_logbuffer,
sizeof(logbuffer) - bytes_in_logbuffer,
&bytesRead,
0);
* Enter critical section before doing anything that might touch
* global state shared by the main thread. Anything that uses
* palloc()/pfree() in particular are not safe outside the critical
* section.
*/
EnterCriticalSection(&sysloggerSection);
if (!result) {
DWORD error = GetLastError();
if (error == ERROR_HANDLE_EOF || error == ERROR_BROKEN_PIPE)
break;
_dosmaperr(error);
ereport(LOG, (errcode_for_file_access(), errmsg("could not read from logger pipe: %m")));
} else if (bytesRead > 0) {
bytes_in_logbuffer += bytesRead;
process_pipe_input(logbuffer, &bytes_in_logbuffer);
}
* If we've filled the current logfile, nudge the main thread to do a
* log rotation.
*/
if (u_sess->attr.attr_common.Log_RotationSize > 0) {
if (ftell(t_thrd.logger.syslogFile) >= u_sess->attr.attr_common.Log_RotationSize * 1024L ||
(t_thrd.logger.querylogFile != NULL &&
ftell(t_thrd.logger.querylogFile) >= u_sess->attr.attr_common.Log_RotationSize * 1024L) ||
(t_thrd.logger.asplogFile != NULL &&
ftell(t_thrd.logger.asplogFile) >= u_sess->attr.attr_common.Log_RotationSize * 1024L) ||
(t_thrd.logger.csvlogFile != NULL &&
ftell(t_thrd.logger.csvlogFile) >= u_sess->attr.attr_common.Log_RotationSize * 1024L))
SetLatch(&t_thrd.logger.sysLoggerLatch);
}
LeaveCriticalSection(&sysloggerSection);
}
t_thrd.logger.pipe_eof_seen = true;
flush_pipe_input(logbuffer, &bytes_in_logbuffer);
SetLatch(&t_thrd.logger.sysLoggerLatch);
LeaveCriticalSection(&sysloggerSection);
_endthread();
return 0;
}
#endif
* Open the csv log file - we do this opportunistically, because
* we don't know if CSV logging will be wanted.
*
* This is only used the first time we open the csv log in a given syslogger
* process, not during rotations. As with opening the main log file, we
* always append in this situation.
*/
static void open_csvlogfile(void)
{
char* filename = NULL;
filename = logfile_getname(
time(NULL), ".csv", u_sess->attr.attr_common.Log_directory, u_sess->attr.attr_common.Log_filename);
t_thrd.logger.csvlogFile = logfile_open(filename, "a", false);
if (t_thrd.logger.last_csv_file_name != NULL)
pfree(t_thrd.logger.last_csv_file_name);
t_thrd.logger.last_csv_file_name = filename;
}
#ifdef ENABLE_UT
#define static
#endif
* Open a new logfile with proper permissions and buffering options.
*
* If allow_errors is true, we just log any open failure and return NULL
* (with errno still correct for the fopen failure).
* Otherwise, errors are treated as fatal.
*/
static FILE* logfile_open(const char* filename, const char* mode, bool allow_errors)
{
FILE* fh = NULL;
struct stat checkdir;
bool dirIsExist = false;
* Note we do not let Log_file_mode disable IWUSR, since we certainly want
* to be able to write the files ourselves.
*/
if (filename == NULL) {
ereport(ERROR, (errcode(ERRCODE_UNEXPECTED_NULL_VALUE), errmsg("group_name can not be NULL ")));
}
if (stat(filename, &checkdir) == 0) {
dirIsExist = true;
}
fh = fopen(filename, mode);
if (fh != NULL) {
setvbuf(fh, NULL, LBF_MODE, 0);
#ifdef WIN32
_setmode(_fileno(fh), _O_TEXT);
#endif
} else {
int save_errno = errno;
if (allow_errors) {
ereport(LOG, (errcode_for_file_access(), errmsg("could not open log file \"%s\": %m", filename)));
errno = save_errno;
} else {
* If open file failed, we can not write any log to file, make the
* system crash is safe.
*/
ereport(WARNING, (errcode_for_file_access(), errmsg("failed to open log file \"%s\": %m", filename)));
t_thrd.int_cxt.ImmediateInterruptOK = false;
fflush(stdout);
fflush(stderr);
abort();
}
}
* Note we do not let Log_file_mode disable IWUSR, since we certainly want
* to be able to write the files ourselves.
*/
if (!dirIsExist) {
if (chmod(filename,
(((mode_t)u_sess->attr.attr_common.Log_file_mode | S_IWUSR) & (~S_IXUSR) & (~S_IXOTH) & (~S_IXGRP))) < 0) {
int save_errno = errno;
ereport(allow_errors ? LOG : FATAL,
(errcode_for_file_access(), errmsg("could not chmod log file \"%s\": %m", filename)));
errno = save_errno;
}
}
return fh;
}
#if defined(ENABLE_UT) && defined(static)
#undef static
#endif
* perform logfile rotation
*/
static void logfile_rotate(bool time_based_rotation, int size_rotation_for, bool time_span_variation)
{
char* filename = NULL;
char* csvfilename = NULL;
pg_time_t fntime;
FILE* fh = NULL;
bool is_ow_oldlog = false;
int64 update_syslog_size = 0;
int64 update_csvlog_size = 0;
t_thrd.logger.rotation_requested = false;
* When doing a time-based rotation, invent the new logfile name based on
* the planned rotation time, not current time, to avoid "slippage" in the
* file name when we don't do the rotation immediately.
*/
if (time_based_rotation && !time_span_variation)
fntime = t_thrd.logger.next_rotation_time;
else
fntime = time(NULL);
filename =
logfile_getname(fntime, NULL, u_sess->attr.attr_common.Log_directory, u_sess->attr.attr_common.Log_filename);
if (t_thrd.logger.csvlogFile != NULL)
csvfilename = logfile_getname(
fntime, ".csv", u_sess->attr.attr_common.Log_directory, u_sess->attr.attr_common.Log_filename);
* Decide whether to overwrite or append. We can overwrite if (a)
* Log_truncate_on_rotation is set, (b) the rotation was triggered by
* elapsed time and not something else, and (c) the computed file name is
* different from what we were previously logging into.
*
* Note: t_thrd.logger.last_file_name should never be NULL here, but if it is, append.
*/
if (time_based_rotation || (size_rotation_for & LOG_DESTINATION_STDERR)) {
if (u_sess->attr.attr_common.Log_truncate_on_rotation && time_based_rotation &&
t_thrd.logger.last_file_name != NULL) {
if (strcmp(filename, t_thrd.logger.last_file_name) != 0) {
* This indicates that the log is switched to a new file for overwriting.
* Therefore, the size of the file being written must be added to the total size.
* If the file to be overwritten is an existing file, the size of the existing
* file is subtracted from the total size.
*/
update_syslog_size += GetUpdateSize(t_thrd.logger.syslogFile, filename);
fh = logfile_open(filename, "w", true);
} else {
fclose(t_thrd.logger.syslogFile);
fh = logfile_open(filename, "w", true);
is_ow_oldlog = true;
}
} else {
* This indicates that logs are written in append mode. At least, the writing of the current log file
* is complete. Therefore, you need to add the size of the current log file. The file that is being written
* becomes a new log file that is being written. Therefore, the size of the file that is being written
* needs to be subtracted.
*/
update_syslog_size += GetUpdateSize(t_thrd.logger.syslogFile, filename);
fh = logfile_open(filename, "a", true);
}
if (fh == NULL) {
* ENFILE/EMFILE are not too surprising on a busy system; just
* keep using the old file till we manage to get a new one.
* Otherwise, assume something's wrong with Log_directory and stop
* trying to create files.
*/
if (errno != ENFILE && errno != EMFILE) {
ereport(LOG, (errmsg("disabling automatic rotation (use SIGHUP to re-enable)")));
t_thrd.logger.rotation_disabled = true;
}
if (filename != NULL)
pfree(filename);
if (csvfilename != NULL)
pfree(csvfilename);
return;
}
if (!is_ow_oldlog)
fclose(t_thrd.logger.syslogFile);
t_thrd.logger.syslogFile = fh;
if (t_thrd.logger.last_file_name != NULL)
pfree(t_thrd.logger.last_file_name);
t_thrd.logger.last_file_name = filename;
filename = NULL;
}
is_ow_oldlog = false;
if (t_thrd.logger.csvlogFile != NULL && (time_based_rotation || (size_rotation_for & LOG_DESTINATION_CSVLOG)) &&
((unsigned int)t_thrd.log_cxt.Log_destination & LOG_DESTINATION_CSVLOG)) {
if (u_sess->attr.attr_common.Log_truncate_on_rotation && time_based_rotation &&
t_thrd.logger.last_csv_file_name != NULL) {
if (strcmp(csvfilename, t_thrd.logger.last_csv_file_name) != 0) {
update_csvlog_size += GetUpdateSize(t_thrd.logger.csvlogFile, csvfilename);
fh = logfile_open(csvfilename, "w", true);
} else {
fclose(t_thrd.logger.csvlogFile);
fh = logfile_open(csvfilename, "w", true);
is_ow_oldlog = true;
}
} else {
update_csvlog_size += GetUpdateSize(t_thrd.logger.csvlogFile, csvfilename);
fh = logfile_open(csvfilename, "a", true);
}
if (fh == NULL) {
* ENFILE/EMFILE are not too surprising on a busy system; just
* keep using the old file till we manage to get a new one.
* Otherwise, assume something's wrong with Log_directory and stop
* trying to create files.
*/
if (errno != ENFILE && errno != EMFILE) {
ereport(LOG, (errmsg("disabling automatic rotation (use SIGHUP to re-enable)")));
t_thrd.logger.rotation_disabled = true;
}
if (filename != NULL)
pfree(filename);
if (csvfilename != NULL)
pfree(csvfilename);
return;
}
if (!is_ow_oldlog)
fclose(t_thrd.logger.csvlogFile);
t_thrd.logger.csvlogFile = fh;
if (t_thrd.logger.last_csv_file_name != NULL)
pfree(t_thrd.logger.last_csv_file_name);
t_thrd.logger.last_csv_file_name = csvfilename;
csvfilename = NULL;
}
if (filename != NULL)
pfree(filename);
if (csvfilename != NULL)
pfree(csvfilename);
t_thrd.logger.total_syslogs_size += (update_syslog_size + update_csvlog_size);
set_next_rotation_time();
}
* construct logfile name using timestamp information
*
* If suffix isn't NULL, append it to the name, replacing any ".log"
* that may be in the pattern.
*
* Result is palloc'd.
*/
static char* logfile_getname(pg_time_t timestamp, const char* suffix, const char* logdir, const char* filename_pattern)
{
char* filename = NULL;
int len = 0;
int ret = 0;
filename = (char*)palloc(MAXPGPATH);
ret = snprintf_s(filename, MAXPGPATH, MAXPGPATH - 1, "%s/", logdir);
securec_check_ss(ret, "", "");
len = strlen(filename);
pg_strftime(filename + len, MAXPGPATH - len, filename_pattern, pg_localtime(×tamp, log_timezone));
if (suffix != NULL) {
len = strlen(filename);
if (len > 4 && (strcmp(filename + (len - 4), ".log") == 0))
len -= 4;
strlcpy(filename + len, suffix, MAXPGPATH - len);
}
return filename;
}
* Determine the next planned rotation time, and store in t_thrd.logger.next_rotation_time.
*/
static void set_next_rotation_time(void)
{
pg_time_t now;
struct pg_tm* tm_t = NULL;
int rotinterval;
if (u_sess->attr.attr_common.Log_RotationAge <= 0)
return;
* The requirements here are to choose the next time > now that is a
* "multiple" of the log rotation interval. "Multiple" can be interpreted
* fairly loosely. In this version we align to log_timezone rather than
* GMT.
*/
rotinterval = u_sess->attr.attr_common.Log_RotationAge * SECS_PER_MINUTE;
now = (pg_time_t)time(NULL);
tm_t = pg_localtime(&now, log_timezone);
if (NULL == tm_t) {
return;
}
now += tm_t->tm_gmtoff;
now -= now % rotinterval;
now += rotinterval;
now -= tm_t->tm_gmtoff;
t_thrd.logger.next_rotation_time = now;
}
* signal handler routines
* --------------------------------
*/
static void sigHupHandler(SIGNAL_ARGS)
{
int save_errno = errno;
t_thrd.worker_sig_flags.got_SIGHUP = true;
SetLatch(&t_thrd.logger.sysLoggerLatch);
errno = save_errno;
}
static void sigUsr1Handler(SIGNAL_ARGS)
{
int save_errno = errno;
LogControlData* logctl = NULL;
if (g_instance.flush_buf_requested) {
foreach_logctl(logctl) {
logctl->flush_requested = true;
}
g_instance.flush_buf_requested = false;
} else {
t_thrd.logger.rotation_requested = true;
foreach_logctl(logctl) {
logctl->rotation_requested = true;
}
}
SetLatch(&t_thrd.logger.sysLoggerLatch);
errno = save_errno;
}
void set_flag_to_flush_buffer(void)
{
g_instance.flush_buf_requested = true;
}
* @Description: get log directory for different log type.
* @Param[IN] logid: log type tag
* @Param[IN] include_nodename: nodename appears in log directory info
* @Return: log directory
* @See also:
*/
static char* LogCtlGetLogDirectory(const char* logid, bool include_nodename)
{
char path[MAXPGPATH] = {0};
char* rootdir = gs_getenv_r("GAUSSLOG");
char log_rootdir[PATH_MAX + 1] = {'\0'};
if (rootdir == NULL || realpath(rootdir, log_rootdir) == NULL) {
ereport(WARNING,
(errmodule(MOD_EXECUTOR), errcode(ERRCODE_EXTERNAL_ROUTINE_INVOCATION_EXCEPTION),
errmsg("Failed to obtain environment value $GAUSSLOG!"),
errdetail("N/A"),
errcause("Incorrect environment value."),
erraction("Please refer to backend log for more details.")));
}
rootdir = NULL;
int rc = 0;
* $GAUSSLOG env must not be an empty string.
* if so, log directory will be under root dir '/' and permition denied.
*/
if (*log_rootdir != '\0') {
check_backend_env(log_rootdir);
rc = strcat_s(path, MAXPGPATH, log_rootdir);
securec_check_c(rc, "\0", "\0");
rc = strcat_s(path, MAXPGPATH, "/");
securec_check_c(rc, "\0", "\0");
}
rc = strcat_s(path, MAXPGPATH, logid);
securec_check_c(rc, "\0", "\0");
rc = strcat_s(path, MAXPGPATH, "/");
securec_check_c(rc, "\0", "\0");
if (include_nodename) {
rc = strcat_s(path, MAXPGPATH, g_instance.attr.attr_common.PGXCNodeName);
securec_check_c(rc, "\0", "\0");
}
return pstrdup(path);
}
static void copy_name(const char* src, char* dst)
{
size_t len = strlen(src);
if (len >= LOG_MAX_NODENAME_LEN) {
len = LOG_MAX_NODENAME_LEN - 1;
}
int rc = memcpy_s(dst, LOG_MAX_NODENAME_LEN, src, len + 1);
securec_check(rc, "\0", "\0");
dst[len] = '\0';
}
* logCtlNodeName && logCtlHostName will be inited by postmaster only once.
* it's a pity that PGXCNodeName is null in syslog thread,
* so we have to set this global information from postmaster thread.
*/
static void LogCtlSetGlobalNames(void)
{
if (0 == logCtlNodeName[0]) {
copy_name(g_instance.attr.attr_common.PGXCNodeName, logCtlNodeName);
}
if (0 == logCtlHostName[0]) {
const char* hostname = gs_getenv_r("HOSTNAME");
if (NULL == hostname) {
hostname = "UnknownHostname";
}
check_backend_env(hostname);
copy_name(hostname, logCtlHostName);
}
}
* logCtlTimeZone will be inited by postmaster only once.`
* it's a pity that log_timezone is null in syslog thread,
* so we have to set this global information from postmaster thread.
*/
static void LogCtlSetTimeZone(void)
{
if (log_timezone) {
int rc = memcpy_s(logCtlTimeZone, TZ_STRLEN_MAX + 1, pg_get_timezone_name(log_timezone), TZ_STRLEN_MAX + 1);
securec_check(rc, "\0", "\0");
}
}
* @Description: write head data for each new log file
* @Param[IN] logctl: log manager for different log types
* @Return: void
* @See also:
*/
static void LogCtlWriteFileHeader(LogControlData* logctl)
{
size_t hostname_len = strlen(logCtlHostName) + 1;
size_t nodename_len = strlen(logCtlNodeName) + 1;
size_t timezone_len = strlen(logCtlTimeZone) + 1;
size_t total_len = sizeof(LogFileHeader) + hostname_len + nodename_len + timezone_len;
int rc = 0;
total_len = MAXALIGN(total_len);
Assert(total_len <= BLCKSZ);
char* buf = (char*)palloc0(total_len);
int off = 0;
*(unsigned long*)(buf + off) = LOG_MAGICNUM;
off += sizeof(unsigned long);
*(uint16*)(buf + off) = logctl->ver;
off += sizeof(uint16);
*(uint8*)(buf + off) = (uint8)hostname_len;
off += sizeof(uint8);
*(uint8*)(buf + off) = (uint8)nodename_len;
off += sizeof(uint8);
*(uint16*)(buf + off) = (uint16)timezone_len;
off += sizeof(uint16);
rc = memcpy_s(buf + off, total_len - off, logCtlHostName, hostname_len);
securec_check(rc, "\0", "\0");
off += hostname_len;
rc = memcpy_s(buf + off, total_len - off, logCtlNodeName, nodename_len);
securec_check(rc, "\0", "\0");
off += nodename_len;
rc = memcpy_s(buf + off, total_len - off, logCtlTimeZone, timezone_len);
securec_check(rc, "\0", "\0");
off += timezone_len;
Assert(total_len - off >= sizeof(unsigned long));
*(unsigned long*)(buf + total_len - sizeof(unsigned long)) = LOG_MAGICNUM;
Assert(logctl->now_file_fd);
errno = 0;
size_t ret_len = fwrite(buf, 1, total_len, logctl->now_file_fd);
if ((errno != 0) || (ret_len != total_len)) {
char errorbuf[ERROR_BUF_SIZE] = {'\0'};
rc = sprintf_s(
errorbuf, ERROR_BUF_SIZE, "ERROR: could not write file head for binary log: %s\n", gs_strerror(errno));
securec_check_ss_c(rc, "\0", "\0");
syslogger_erewrite(logctl->now_file_fd, errorbuf);
}
pfree(buf);
}
* @Description: rotate and create a new log file
* @Param[IN] logctl: log manager for different log types
* @Param[IN] time_based_rotation: time based rotation
* @Return: void
* @See also:
*/
static void LogCtlRotateFile(LogControlData* logctl, bool time_based_rotation)
{
logctl->rotation_requested = false;
pg_time_t fntime = time_based_rotation ? t_thrd.logger.next_rotation_time : time(NULL);
char* filename = logfile_getname(fntime, NULL, logctl->log_dir, logctl->filename_pattern);
* Decide whether to overwrite or append. We can overwrite if (a)
* Log_truncate_on_rotation is set, (b) the rotation was triggered by
* elapsed time and not something else, and (c) the computed file name is
* different from what we were previously logging into.
*
* Note: logctl->now_file_name should never be NULL here, but if it is, append.
*/
char* write_mode = NULL;
if (u_sess->attr.attr_common.Log_truncate_on_rotation && time_based_rotation && logctl->now_file_name &&
strcmp(filename, logctl->now_file_name) != 0) {
write_mode = "w";
} else {
write_mode = "a";
}
FILE* fh = logfile_open(filename, write_mode, true);
if (fh == NULL) {
if (errno != ENFILE && errno != EMFILE) {
ereport(LOG, (errmsg("disable automatic PLOG rotation (use SIGHUP to re-enable)")));
t_thrd.logger.rotation_disabled = true;
}
pfree(filename);
return;
}
fclose(logctl->now_file_fd);
logctl->now_file_fd = fh;
if (logctl->now_file_name != NULL) {
pfree(logctl->now_file_name);
}
logctl->now_file_name = filename;
LogCtlWriteFileHeader(logctl);
}
* @Description: rotate log file if needed. we will flush
* the buffered data into previous log file.
* @Param[IN] logctl: log manager for different log types
* @Param[IN] time_based_rotation: time based rotation
* @Return: void
* @See also:
*/
static void LogCtlRotateLogFileIfNeeded(LogControlData* logctl, bool time_based_rotation)
{
if (logctl->flush_requested) {
logctl->flush_requested = false;
LogCtlFlushBuf(logctl);
}
* case 1: rotation requested, including rotation age request.
* case 2: single file size reaches PROFILE_LOG_ROTATE_SIZE amount.
*/
if (logctl->rotation_requested ||
(!t_thrd.logger.rotation_disabled &&
(ftell(logctl->now_file_fd) >= (PROFILE_LOG_ROTATE_SIZE - logctl->cur_len)))) {
LogCtlFlushBuf(logctl);
LogCtlRotateFile(logctl, time_based_rotation);
}
}
* @Description: flush log buffer data into disk.
* if disk is full, process will enter waiting forever until this problem
* is solved.
* if disk writing error happens, stderr will be written. (may be some problems)
* @Return: void
* @See also:
*/
static void LogCtlFlushBuf(LogControlData* logctl)
{
for (;;) {
errno = 0;
size_t rc = fwrite(logctl->log_buf, 1, logctl->cur_len, logctl->now_file_fd);
if ((errno != 0) || ((int)rc != logctl->cur_len)) {
* if no disk space, we will retry,
* and we can not report a log, because there is not space to write.
*/
if (errno == ENOSPC) {
break;
}
char errorbuf[ERROR_BUF_SIZE] = {'\0'};
int rc_error = sprintf_s(errorbuf,
ERROR_BUF_SIZE,
"ERROR: could not write profile log: %s\n"
"WARNING: discard profile log because of disk IO error\n",
gs_strerror(errno));
securec_check_ss_c(rc_error, "\0", "\0");
syslogger_erewrite(logctl->now_file_fd, errorbuf);
}
break;
}
logctl->cur_len = 0;
}
* @Description: append an input log message into log buffer.
* if buffer will be full, flush buffer first.
* @Param[IN] logctl: log manager for different log types
* @Param[IN] msg: input log message
* @Param[IN] len: length of input log message
* @Return: void
* @See also:
*/
static void LogCtlProcessInput(LogControlData* logctl, const char* msg, int len)
{
if (logctl->cur_len + len > logctl->max_len) {
LogCtlFlushBuf(logctl);
}
int rc = memcpy_s(logctl->log_buf + logctl->cur_len, logctl->max_len, msg, len);
securec_check(rc, "\0", "\0");
logctl->cur_len += len;
}
* @Description: get its log file name pattern for different log type.
* @Param[IN] post_suffix: log file suffix
* @Return: log file name pattern
* @See also:
*/
static char* LogCtlGetFilenamePattern(const char* post_suffix)
{
char* pattern = NULL;
const size_t len = strlen(u_sess->attr.attr_common.Log_filename);
int maxlen = 0;
int rc = 0;
* if there is a suffix within file pattern,
* replace it with my own suffix. otherwise,
* append with my own suffix.
*/
char* p = (char*)memrchr(u_sess->attr.attr_common.Log_filename, '.', len);
size_t filename_len = p ? (p - u_sess->attr.attr_common.Log_filename) : len;
maxlen = filename_len + 5;
pattern = (char*)palloc(maxlen);
rc = memcpy_s(pattern, maxlen, u_sess->attr.attr_common.Log_filename, filename_len);
securec_check(rc, "\0", "\0");
rc = memcpy_s(pattern + filename_len, maxlen - filename_len, PROFILE_LOG_SUFFIX, 4);
securec_check(rc, "\0", "\0");
pattern[maxlen - 1] = '\0';
return pattern;
}
* @Description: Init profile log control data.
* notice, this function is reentrant.
* @Return: void
* @See also:
*/
static void PLogCtlInit(void)
{
if (g_instance.comm_cxt.pLogCtl != NULL) {
t_thrd.log_cxt.pLogCtl = (LogControlData*)g_instance.comm_cxt.pLogCtl;
} else {
t_thrd.log_cxt.pLogCtl = (LogControlData*)palloc0(sizeof(LogControlData));
}
errno_t rc = memset_s(t_thrd.log_cxt.pLogCtl, sizeof(LogControlData), 0, sizeof(LogControlData));
securec_check(rc, "\0", "\0");
t_thrd.log_cxt.pLogCtl->ver = PROFILE_LOG_VERSION;
t_thrd.log_cxt.pLogCtl->rotation_requested = false;
t_thrd.log_cxt.pLogCtl->flush_requested = false;
if (NULL == t_thrd.log_cxt.pLogCtl->log_dir) {
t_thrd.log_cxt.pLogCtl->log_dir = LogCtlGetLogDirectory(PROFILE_LOG_TAG, true);
if (0 == mkdir(t_thrd.log_cxt.pLogCtl->log_dir, S_IRWXU) || (EEXIST == errno)) {
(void)chmod(t_thrd.log_cxt.pLogCtl->log_dir, S_IRWXU);
} else {
if (EEXIST != errno) {
ereport(FATAL,
(errmsg(
"ERROR: could not create directory \"%s\": %s\n", PROFILE_LOG_TAG, gs_strerror(errno))));
}
}
}
if (NULL == t_thrd.log_cxt.pLogCtl->filename_pattern) {
t_thrd.log_cxt.pLogCtl->file_suffix = PROFILE_LOG_SUFFIX;
t_thrd.log_cxt.pLogCtl->filename_pattern = LogCtlGetFilenamePattern(PROFILE_LOG_SUFFIX);
t_thrd.log_cxt.pLogCtl->now_file_name = NULL;
t_thrd.log_cxt.pLogCtl->now_file_fd = NULL;
}
if (NULL == t_thrd.log_cxt.pLogCtl->log_buf) {
t_thrd.log_cxt.pLogCtl->log_buf = (char*)palloc(READ_BUF_SIZE);
t_thrd.log_cxt.pLogCtl->max_len = READ_BUF_SIZE;
t_thrd.log_cxt.pLogCtl->cur_len = 0;
}
t_thrd.log_cxt.pLogCtl->inited = true;
allLogCtl[LOG_TYPE_PLOG] = t_thrd.log_cxt.pLogCtl;
}
* @Description: create log directory for the other types if not present,
* ignore errors.
* @Return: void
* @See also:
*/
static void LogCtlCreateLogParentDirectory(void)
{
char* logdir = NULL;
* if EEXIST == errno, this directory may be created already, don't care this case.
*/
logdir = LogCtlGetLogDirectory(PROFILE_LOG_TAG, false);
if (0 == mkdir(logdir, S_IRWXU) || (EEXIST == errno)) {
* make sure dir permition is 700.
* parent directory may be created by OM tool. if not so
* chmod() may be called by many process, and it maybe failed.
* ignore its returned value of this case.
*/
(void)chmod(logdir, S_IRWXU);
} else if (EEXIST != errno) {
ereport(FATAL, (errmsg("could not create log directory \"%s\": %s\n", logdir, gs_strerror(errno))));
}
pfree(logdir);
}
* @Description: Postmaster must do the last flush for all the logs.
* Under thread mode, postmaster doesn't wait the syslogger exit
* before the whole process exit, and it finishes first. so syslogger
* thread may be died directly and log data maybe loss.
* error log doesn't have this problem, because it's written directly
* into disk and flushed by OS during process exits.
* @Return: void
* @See also:
*/
void LogCtlLastFlushBeforePMExit(void)
{
if (!g_instance.attr.attr_common.Logging_collector) {
return;
}
LogControlData* logctl = NULL;
* needn't lock, because no profile data is generated,
* and syslogger never call flushing buffer.
*/
foreach_logctl(logctl) {
LogCtlFlushBuf(logctl);
* memory and fd will be released because
* the whole process is exiting.
*/
}
}
void* ASPOpenLogFile(bool *doOpen)
{
if (doOpen != NULL) {
*doOpen = false;
}
if (t_thrd.logger.asplogFile == NULL) {
char *filename = logfile_getname(time(NULL), ".log",
g_instance.attr.attr_common.asp_log_directory, u_sess->attr.attr_common.asp_log_filename);
t_thrd.logger.asplogFile = logfile_open(filename, "a", false);
if (t_thrd.logger.last_asp_file_name != NULL)
pfree(t_thrd.logger.last_asp_file_name);
t_thrd.logger.last_asp_file_name = filename;
if (doOpen != NULL) {
*doOpen = true;
}
}
return (void *)t_thrd.logger.asplogFile;
}
void ASPCloseLogFile()
{
if (t_thrd.logger.asplogFile != NULL) {
fclose(t_thrd.logger.asplogFile);
t_thrd.logger.asplogFile = NULL;
}
}
* * perform logfile rotation
* */
static void asp_logfile_rotate(bool time_based_rotation, int size_rotation_for)
{
char* aspFilename = NULL;
pg_time_t fntime;
FILE* fh = NULL;
t_thrd.logger.rotation_requested = false;
* When doing a time-based rotation, invent the new logfile name based on
* the planned rotation time, not current time, to avoid "slippage" in the
* file name when we don't do the rotation immediately.
*/
if (time_based_rotation)
fntime = t_thrd.logger.next_rotation_time;
else
fntime = time(NULL);
aspFilename =
logfile_getname(time(NULL), ".log",
g_instance.attr.attr_common.asp_log_directory,
u_sess->attr.attr_common.asp_log_filename);
* Decide whether to overwrite or append. We can overwrite if (a)
* Log_truncate_on_rotation is set, (b) the rotation was triggered by
* elapsed time and not something else, and (c) the computed file name is
* different from what we were previously logging into.
*
* Note: t_thrd.logger.last_file_name should never be NULL here, but if it is, append.
*/
if ((time_based_rotation || (size_rotation_for & LOG_DESTINATION_ASPLOG)) && pmState == PM_RUN) {
if (u_sess->attr.attr_common.Log_truncate_on_rotation && time_based_rotation &&
t_thrd.logger.asplogFile != NULL && strcmp(aspFilename, t_thrd.logger.last_asp_file_name) != 0) {
fh = logfile_open(aspFilename, "w", true);
} else {
fh = logfile_open(aspFilename, "a", true);
}
if (fh == NULL) {
* ENFILE/EMFILE are not too surprising on a busy system; just
* keep using the old file till we manage to get a new one.
* Otherwise, assume something's wrong with Log_directory and stop
* trying to create files.
*/
if (errno != ENFILE && errno != EMFILE) {
ereport(LOG, (errmsg("disabling automatic rotation (use SIGHUP to re-enable)")));
t_thrd.logger.rotation_disabled = true;
}
if (aspFilename != NULL)
pfree(aspFilename);
return;
}
if (t_thrd.logger.asplogFile != NULL) {
fclose(t_thrd.logger.asplogFile);
}
t_thrd.logger.asplogFile = fh;
if (t_thrd.logger.last_asp_file_name != NULL)
pfree(t_thrd.logger.last_asp_file_name);
t_thrd.logger.last_asp_file_name = aspFilename;
aspFilename = NULL;
}
if (aspFilename != NULL) {
pfree(aspFilename);
}
}
void* SQMOpenLogFile(bool *doOpen)
{
if (doOpen != NULL)
*doOpen = false;
if (t_thrd.logger.querylogFile == NULL) {
char *filename = logfile_getname(time(NULL), ".log",
g_instance.attr.attr_common.query_log_directory,
u_sess->attr.attr_common.query_log_file);
t_thrd.logger.querylogFile = logfile_open(filename, "a", false);
pfree(filename);
if (doOpen != NULL) {
*doOpen = true;
}
}
return (void *)t_thrd.logger.querylogFile;
}
void SQMCloseLogFile()
{
if (t_thrd.logger.querylogFile != NULL) {
fclose(t_thrd.logger.querylogFile);
t_thrd.logger.querylogFile = NULL;
}
}
static void slow_query_logfile_rotate(bool time_based_rotation, int size_rotation_for)
{
char* queryFilename = NULL;
pg_time_t fntime;
FILE* fh = NULL;
t_thrd.logger.rotation_requested = false;
* When doing a time-based rotation, invent the new logfile name based on
* the planned rotation time, not current time, to avoid "slippage" in the
* file name when we don't do the rotation immediately.
*/
if (time_based_rotation)
fntime = t_thrd.logger.next_rotation_time;
else
fntime = time(NULL);
queryFilename =
logfile_getname(time(NULL), ".log", g_instance.attr.attr_common.query_log_directory, u_sess->attr.attr_common.query_log_file);
* Decide whether to overwrite or append. We can overwrite if (a)
* Log_truncate_on_rotation is set, (b) the rotation was triggered by
* elapsed time and not something else, and (c) the computed file name is
* different from what we were previously logging into.
*
* Note: t_thrd.logger.last_file_name should never be NULL here, but if it is, append.
*/
if ((time_based_rotation || (size_rotation_for & LOG_DESTINATION_QUERYLOG)) && pmState == PM_RUN) {
if (u_sess->attr.attr_common.Log_truncate_on_rotation && time_based_rotation &&
t_thrd.logger.querylogFile != NULL && strcmp(queryFilename, t_thrd.logger.last_query_log_file_name) != 0) {
fh = logfile_open(queryFilename, "w", true);
} else {
fh = logfile_open(queryFilename, "a", true);
}
if (fh == NULL) {
* ENFILE/EMFILE are not too surprising on a busy system; just
* keep using the old file till we manage to get a new one.
* Otherwise, assume something's wrong with Log_directory and stop
* trying to create files.
*/
if (errno != ENFILE && errno != EMFILE) {
ereport(LOG, (errmsg("disabling automatic rotation (use SIGHUP to re-enable)")));
t_thrd.logger.rotation_disabled = true;
}
if (queryFilename != NULL)
pfree(queryFilename);
return;
}
if (t_thrd.logger.querylogFile != NULL) {
fclose(t_thrd.logger.querylogFile);
}
t_thrd.logger.querylogFile = fh;
if (t_thrd.logger.last_query_log_file_name != NULL)
pfree(t_thrd.logger.last_query_log_file_name);
t_thrd.logger.last_query_log_file_name = queryFilename;
queryFilename = NULL;
}
if (queryFilename != NULL)
pfree(queryFilename);
}
void init_instr_log_directory(bool include_nodename, const char* logid)
{
char* logdir = NULL;
logdir = LogCtlGetLogDirectory(logid, include_nodename);
if (pg_mkdir_p(logdir, S_IRWXU) == 0 || (errno == EEXIST)) {
* make sure dir permition is 700.
* parent directory may be created by OM tool. if not so
* chmod() may be called by many process, and it maybe failed.
* ignore its returned value of this case.
*/
(void)chmod(logdir, S_IRWXU);
} else {
if (errno != EEXIST) {
pfree(logdir);
ereport(FATAL,
(errmsg(
"ERROR: could not create instr log directory \"%s\": %s\n", logid, gs_strerror(errno))));
}
}
if (include_nodename) {
if (strcmp(logid, ASP_LOG_TAG) == 0) {
g_instance.attr.attr_common.asp_log_directory = logdir;
} else if (strcmp(logid, SLOWQUERY_LOG_TAG) == 0) {
g_instance.attr.attr_common.query_log_directory = logdir;
} else if (strcmp(logid, PERF_JOB_TAG) == 0) {
g_instance.attr.attr_common.Perf_directory = logdir;
} else if (strcmp(logid, MEMORY_LOG_TAG) == 0) {
g_instance.stat_cxt.memory_log_directory = logdir;
}
} else {
pfree(logdir);
}
}
static int LogInfoCmp(const void* v1, const void* v2)
{
const LogInfo* l1 = *(LogInfo**)v1;
const LogInfo* l2 = *(LogInfo**)v2;
int result = l1->mTime - l2->mTime;
if (result == 0) {
return l1->cTime - l2->cTime;
}
return result;
}
static void MakeSortedLogInfoList(List* list, cmp_func cmp)
{
int len = list_length(list);
if (0 == len || 1 == len) {
return;
}
void** ptr_array = (void**)palloc(len * sizeof(LogInfo));
ListCell* cell = NULL;
int idx = 0;
foreach (cell, list) {
ptr_array[idx++] = (void*)lfirst(cell);
}
qsort(ptr_array, len, sizeof(void*), cmp);
idx = 0;
foreach (cell, list) {
lfirst(cell) = ptr_array[idx++];
}
pfree_ext(ptr_array);
}
static void RemoveOldestLog(const char* path, int64* totalSize, int64 curSize)
{
char pathname[MAXPGPATH] = {'\0'};
DIR* dirDesc = NULL;
struct dirent* dirEntry = NULL;
errno_t rc = EOK;
List* logInfoList = NIL;
int64 totalSizeBak = *totalSize;
*totalSize = 0;
bool isInterrupt = false;
dirDesc = AllocateDir(path);
if (dirDesc == NULL) {
ereport(ERROR, (errmsg("can not open directory %s", path)));
}
while ((dirEntry = ReadDir(dirDesc, path)) != NULL) {
if (InterruptPending) {
isInterrupt = true;
*totalSize = totalSizeBak;
FreeDir(dirDesc);
CHECK_FOR_INTERRUPTS();
break;
}
struct stat fst;
if (unlikely(strcmp(dirEntry->d_name, ".") == 0 || strcmp(dirEntry->d_name, "..") == 0)) {
continue;
}
rc = snprintf_s(pathname, MAXPGPATH, MAXPGPATH - 1, "%s/%s", path, dirEntry->d_name);
securec_check_ss(rc, "\0", "\0");
if (unlikely(stat(pathname, &fst) < 0)) {
FreeDir(dirDesc);
ereport(ERROR,
(errcode_for_file_access(),
errmsg("could not %s file \"%s\"", errno == ENOENT ? "find" : "stat", pathname)));
}
if (S_ISDIR(fst.st_mode)) {
continue;
}
* The feature of flexible arrays is used here to facilitate memory release of the logInfoList at the end
*/
Size dirLen = strlen(dirEntry->d_name);
LogInfo* logInfo = (LogInfo*)palloc(sizeof(LogInfo) + dirLen + 1);
logInfo->mTime = fst.st_mtime;
logInfo->cTime = fst.st_ctime;
rc = snprintf_s(logInfo->fileName, dirLen + 1, dirLen, "%s", dirEntry->d_name);
securec_check_ss(rc, "\0", "\0");
logInfo->fileSize = fst.st_size;
*totalSize += fst.st_size;
logInfoList = lappend(logInfoList, logInfo);
}
if (!isInterrupt) {
FreeDir(dirDesc);
} else {
list_free_deep(logInfoList);
return;
}
*totalSize -= curSize;
* Perform a secondary judgment on the total number of logs. If the latest log space size does not meet
* the conditions for deleting logs, there is no need to delete them, which means there is no need to sort
* the log files in chronological order
*/
if (NEED_ELIMINATE_LOG(*totalSize + curSize)) {
MakeSortedLogInfoList(logInfoList, LogInfoCmp);
}
ListCell* cell = NULL;
foreach (cell, logInfoList) {
if (!NEED_ELIMINATE_LOG(*totalSize + curSize)) {
break;
}
LogInfo* logInfo = (LogInfo*)lfirst(cell);
rc = snprintf_s(pathname, MAXPGPATH, MAXPGPATH - 1, "%s/%s", path, logInfo->fileName);
securec_check_ss(rc, "\0", "\0");
if (remove(pathname) < 0) {
ereport(ERROR, (errmsg("remove log file \"%s\" failed.", pathname)));
} else {
*totalSize -= logInfo->fileSize;
}
}
list_free_deep(logInfoList);
}
static inline void CheckTotalLogSize(FILE* fh, bool hasCsvFormat, char* currentLogDir, int64* totalSize)
{
if (fh == NULL) {
return;
}
int64 curSysLogSize = ftell(fh);
int64 curCsvLogSize = (hasCsvFormat && t_thrd.logger.csvlogFile != NULL) ? ftell(t_thrd.logger.csvlogFile) : 0;
if (NEED_ELIMINATE_LOG(*totalSize + curSysLogSize + curCsvLogSize)) {
RemoveOldestLog(currentLogDir, totalSize, curSysLogSize + curCsvLogSize);
}
}
static inline int64 GetUpdateSize(FILE* fh, const char* filename)
{
int64 result = 0;
result += (fh == NULL) ? 0 : ftell(fh);
struct stat fst;
if (stat(filename, &fst) >= 0) {
result -= fst.st_size;
}
return result;
}
static void RotateLogFile(int& sizeRotationFor)
{
if (t_thrd.logger.rotation_disabled) {
return;
}
if (t_thrd.logger.last_file_name != NULL &&
!file_exists(t_thrd.logger.last_file_name)) {
t_thrd.logger.rotation_requested = true;
sizeRotationFor |= LOG_DESTINATION_STDERR;
}
if (t_thrd.logger.csvlogFile != NULL &&
t_thrd.logger.last_csv_file_name != NULL &&
!file_exists(t_thrd.logger.last_csv_file_name)) {
t_thrd.logger.rotation_requested = true;
sizeRotationFor |= LOG_DESTINATION_CSVLOG;
}
}
