288 lines
7.8 KiB
C
288 lines
7.8 KiB
C
/*
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Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mysys_priv.h"
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#include "my_sys.h"
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#include <m_string.h>
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#include <stdarg.h>
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#ifndef _WIN32
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#include <syslog.h>
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/*
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Some C libraries offer a variant of this, but we roll our own so we
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won't have to worry about portability.
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*/
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SYSLOG_FACILITY syslog_facility[] = {
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{ LOG_DAEMON, "daemon" }, /* default for mysqld */
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{ LOG_USER, "user" }, /* default for mysql command-line client */
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{ LOG_LOCAL0, "local0" }, { LOG_LOCAL1, "local1" }, { LOG_LOCAL2, "local2" },
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{ LOG_LOCAL3, "local3" }, { LOG_LOCAL4, "local4" }, { LOG_LOCAL5, "local5" },
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{ LOG_LOCAL6, "local6" }, { LOG_LOCAL7, "local7" },
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/* "just in case" */
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{ LOG_AUTH, "auth" }, { LOG_CRON, "cron" }, { LOG_KERN, "kern" },
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{ LOG_LPR, "lpr" }, { LOG_MAIL, "mail" }, { LOG_NEWS, "news" },
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{ LOG_SYSLOG, "syslog" }, { LOG_UUCP, "uucp" },
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#if defined(LOG_FTP)
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{ LOG_FTP, "ftp" },
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#endif
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#if defined(LOG_AUTHPRIV)
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{ LOG_AUTHPRIV, "authpriv" },
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#endif
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{ -1, NULL }};
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#endif
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#ifdef _WIN32
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#define MSG_DEFAULT 0xC0000064L
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static HANDLE hEventLog= NULL; // global
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#endif
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/**
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Sends message to the system logger. On Windows, the specified message is
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internally converted to UCS-2 encoding, while on other platforms, no
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conversion takes place and the string is passed to the syslog API as it is.
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@param cs [in] Character set info of the message string
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@param level [in] Log level
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@param msg [in] Message to be logged
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@return
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0 Success
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-1 Error
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*/
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int my_syslog(const CHARSET_INFO *cs MY_ATTRIBUTE((unused)),
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enum loglevel level,
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const char *msg)
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{
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int _level;
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#ifdef _WIN32
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wchar_t buff[MAX_SYSLOG_MESSAGE_SIZE];
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wchar_t *u16buf= NULL;
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size_t nchars;
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uint dummy_errors;
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DBUG_ENTER("my_syslog");
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_level= (level == INFORMATION_LEVEL) ? EVENTLOG_INFORMATION_TYPE :
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(level == WARNING_LEVEL) ? EVENTLOG_WARNING_TYPE : EVENTLOG_ERROR_TYPE;
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if (hEventLog)
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{
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nchars= my_convert((char *) buff, sizeof(buff) - sizeof(buff[0]),
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&my_charset_utf16le_bin, msg,
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MAX_SYSLOG_MESSAGE_SIZE, cs, &dummy_errors);
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// terminate it with NULL
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buff[nchars / sizeof(wchar_t)]= L'\0';
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u16buf= buff;
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if (!ReportEventW(hEventLog, _level, 0, MSG_DEFAULT, NULL, 1, 0,
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(LPCWSTR*) &u16buf, NULL))
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goto err;
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}
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// Message successfully written to the event log.
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DBUG_RETURN(0);
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err:
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// map error appropriately
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my_osmaperr(GetLastError());
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DBUG_RETURN(-1);
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#else
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DBUG_ENTER("my_syslog");
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_level= (level == INFORMATION_LEVEL) ? LOG_INFO :
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(level == WARNING_LEVEL) ? LOG_WARNING : LOG_ERR;
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syslog(_level, "%s", msg);
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DBUG_RETURN(0);
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#endif /* _WIN32 */
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}
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#ifdef _WIN32
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/**
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Create a key in the Windows registry.
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We'll setup a "MySQL" key in the EventLog branch (RegCreateKey),
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set our executable name (GetModuleFileName) as file-name
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("EventMessageFile"), then set the message types we expect to
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be logging ("TypesSupported").
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If the key does not exist, sufficient privileges will be required
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to create and configure it. If the key does exist, opening it
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should be unprivileged; modifying will fail on insufficient
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privileges, but that is non-fatal.
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@param key [in] Name of the event generator.
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(Only last part of the key, e.g. "MySQL")
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@return
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0 Success
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-1 Error
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*/
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const char registry_prefix[]=
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"SYSTEM\\CurrentControlSet\\services\\eventlog\\Application\\";
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static int windows_eventlog_create_registry_entry(const char *key)
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{
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HKEY hRegKey= NULL;
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DWORD dwError= 0;
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TCHAR szPath[MAX_PATH];
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DWORD dwTypes;
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size_t l= sizeof(registry_prefix) + strlen(key) + 1;
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char *buff;
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int ret= 0;
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DBUG_ENTER("my_syslog");
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if ((buff= (char *) my_malloc(PSI_NOT_INSTRUMENTED, l, MYF(0))) == NULL)
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DBUG_RETURN(-1);
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my_snprintf(buff, l, "%s%s", registry_prefix, key);
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// Opens the event source registry key; creates it first if required.
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dwError= RegCreateKey(HKEY_LOCAL_MACHINE, buff, &hRegKey);
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my_free(buff);
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if (dwError != ERROR_SUCCESS)
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{
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if (dwError == ERROR_ACCESS_DENIED)
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{
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my_message_stderr(0, "Could not create or access the registry key needed for the MySQL application\n"
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"to log to the Windows EventLog. Run the application with sufficient\n"
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"privileges once to create the key, add the key manually, or turn off\n"
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"logging for that application.", MYF(0));
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}
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DBUG_RETURN(-1);
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}
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/* Name of the PE module that contains the message resource */
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GetModuleFileName(NULL, szPath, MAX_PATH);
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/* Register EventMessageFile (DLL/exec containing event identifiers) */
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dwError = RegSetValueEx(hRegKey, "EventMessageFile", 0, REG_EXPAND_SZ,
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(PBYTE) szPath, (DWORD) (strlen(szPath) + 1));
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if ((dwError != ERROR_SUCCESS) && (dwError != ERROR_ACCESS_DENIED))
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ret = -1;
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/* Register supported event types */
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dwTypes= (EVENTLOG_ERROR_TYPE | EVENTLOG_WARNING_TYPE |
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EVENTLOG_INFORMATION_TYPE);
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dwError= RegSetValueEx(hRegKey, "TypesSupported", 0, REG_DWORD,
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(LPBYTE) &dwTypes, sizeof dwTypes);
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if ((dwError != ERROR_SUCCESS) && (dwError != ERROR_ACCESS_DENIED))
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ret= -1;
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RegCloseKey(hRegKey);
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DBUG_RETURN(ret);
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}
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#endif
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/**
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Opens/Registers a new handle for system logging.
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Note: It's a thread-unsafe function. It should either
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be invoked from the main thread or some extra thread
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safety measures need to be taken.
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@param name [in] Name of the event source / syslog ident
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@return
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0 Success
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-1 Error, log not opened
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-2 Error, not updated, using previous values
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*/
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int my_openlog(const char *name, int option, int facility)
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{
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#ifndef _WIN32
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int opts= (option & MY_SYSLOG_PIDS) ? LOG_PID : 0;
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DBUG_ENTER("my_openlog");
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openlog(name, opts | LOG_NDELAY, facility);
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#else
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HANDLE hEL_new;
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DBUG_ENTER("my_openlog");
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// OOM failsafe. Not needed for syslog.
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if (name == NULL)
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DBUG_RETURN(-1);
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if ((windows_eventlog_create_registry_entry(name) != 0) ||
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!(hEL_new= RegisterEventSource(NULL, name)))
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{
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// map error appropriately
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my_osmaperr(GetLastError());
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DBUG_RETURN((hEventLog == NULL) ? -1 : -2);
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}
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else
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{
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if (hEventLog != NULL)
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DeregisterEventSource(hEventLog);
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hEventLog= hEL_new;
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}
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#endif
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DBUG_RETURN(0);
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}
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/**
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Closes/de-registers the system logging handle.
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Note: Its a thread-unsafe function. It should
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either be invoked from the main thread or some
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extra thread safety measures need to be taken.
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@return
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0 Success
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-1 Error
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*/
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int my_closelog(void)
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{
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DBUG_ENTER("my_closelog");
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#ifndef _WIN32
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closelog();
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DBUG_RETURN(0);
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#else
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if ((hEventLog != NULL) && (! DeregisterEventSource(hEventLog)))
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goto err;
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hEventLog= NULL;
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DBUG_RETURN(0);
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err:
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hEventLog= NULL;
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// map error appropriately
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my_osmaperr(GetLastError());
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DBUG_RETURN(-1);
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#endif
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}
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