[mirror_smartmontools-debian.git] / os_win32 / syslog_win32.cpp

/*
 * os_win32/syslog_win32.cpp
 *
 * Home page of code is: http://smartmontools.sourceforge.net
 *
 * Copyright (C) 2004-12 Christian Franke <smartmontools-support@lists.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * You should have received a copy of the GNU General Public License
 * (for example COPYING); If not, see <http://www.gnu.org/licenses/>.
 *
 */

// Win32 Emulation of syslog() for smartd
// Writes to windows event log on NT4/2000/XP
// (Register syslogevt.exe as event message file)
// If facility is set to LOG_LOCAL[0-7], log is written to
// file "<ident>.log", stdout, stderr, "<ident>[1-5].log".


#include "syslog.h"

#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <errno.h>
#include <process.h> // getpid()

#define WIN32_LEAN_AND_MEAN
#include <windows.h> // RegisterEventSourceA(), ReportEventA(), ...

const char *syslog_win32_cpp_cvsid = "$Id: syslog_win32.cpp 3575 2012-07-19 21:32:56Z chrfranke $"
  SYSLOG_H_CVSID;

#ifdef _MSC_VER
// MSVC
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#endif

#define ARGUSED(x) ((void)(x))


#ifndef _MT
//MT runtime not necessary, because thread uses no unsafe lib functions
//#error Program must be linked with multithreaded runtime library
#endif


#ifdef TESTEVT
// Redirect event log to stdout for testing

static BOOL Test_ReportEventA(HANDLE h, WORD type, WORD cat, DWORD id, PSID usid,
						WORD nstrings, WORD datasize, LPCTSTR * strings, LPVOID data)
{
	int i;
	printf("%u %lu:%s", type, id, nstrings != 1?"\n":"");
	for (i = 0; i < nstrings; i++)
		printf(" \"%s\"\n", strings[i]);
	fflush(stdout);
	return TRUE;
}

HANDLE Test_RegisterEventSourceA(LPCTSTR server, LPCTSTR source)
{
	return (HANDLE)42;
}

#define ReportEventA Test_ReportEventA
#define RegisterEventSourceA Test_RegisterEventSourceA
#endif // TESTEVT


// Event message ids,
// should be identical to MSG_SYSLOG* in "syslogevt.h"
// (generated by "mc" from "syslogevt.mc")
#define MSG_SYSLOG                       0x00000000L
#define MSG_SYSLOG_01                    0x00000001L
// ...
#define MSG_SYSLOG_10                    0x0000000AL

static char sl_ident[100];
static char sl_logpath[sizeof(sl_ident) + sizeof("0.log")-1];
static FILE * sl_logfile;
static char sl_pidstr[16];
static HANDLE sl_hevtsrc;


// Ring buffer for event log output via thread
#define MAXLINES 10
#define LINELEN 200

static HANDLE evt_hthread;
static char evt_lines[MAXLINES][LINELEN+1];
static int evt_priorities[MAXLINES];
static volatile int evt_timeout;
static int evt_index_in, evt_index_out;
static HANDLE evt_wait_in, evt_wait_out;


// Map syslog priority to event type

static WORD pri2evtype(int priority)
{
	switch (priority) {
		default:
		case LOG_EMERG: case LOG_ALERT:
		case LOG_CRIT:  case LOG_ERR:
			return EVENTLOG_ERROR_TYPE;
		case LOG_WARNING:
			return EVENTLOG_WARNING_TYPE;
		case LOG_NOTICE: case LOG_INFO:
		case LOG_DEBUG:
			return EVENTLOG_INFORMATION_TYPE;
	}
}


// Map syslog priority to string

static const char * pri2text(int priority)
{
	switch (priority) {
		case LOG_EMERG:   return "EMERG";
		case LOG_ALERT:   return "ALERT";
		case LOG_CRIT:    return "CRIT";
		default:
		case LOG_ERR:     return "ERROR";
		case LOG_WARNING: return "Warn";
		case LOG_NOTICE:  return "Note";
		case LOG_INFO:    return "Info";
		case LOG_DEBUG:   return "Debug";
	}
}


// Output cnt events from ring buffer

static void report_events(int cnt)
{
	const char * msgs[3+MAXLINES];

	int i, pri;
	if (cnt <= 0)
		return;
	if (cnt > MAXLINES)
		cnt = MAXLINES;

	pri = evt_priorities[evt_index_out];

	msgs[0] = sl_ident;
	msgs[1] = sl_pidstr;
	msgs[2] = pri2text(pri);
	for (i = 0; i < cnt; i++) {
		//assert(evt_priorities[evt_index_out] == pri);
		msgs[3+i] = evt_lines[evt_index_out];
		if (++evt_index_out >= MAXLINES)
			evt_index_out = 0;
	}
	ReportEventA(sl_hevtsrc,
		pri2evtype(pri), // type
		0, MSG_SYSLOG+cnt,    // category, message id
		NULL,                 // no security id
		(WORD)(3+cnt), 0,     // 3+cnt strings, ...
		msgs, NULL);          // ...          , no data
}


// Thread to combine several syslog lines into one event log entry

static ULONG WINAPI event_logger_thread(LPVOID arg)
{
	int cnt;
	ARGUSED(arg);

	cnt = 0;
	for (;;) {
		// Wait for first line ...
		int prior, i, rest;
		if (cnt == 0) {
			if (WaitForSingleObject(evt_wait_out, (evt_timeout? INFINITE : 0)) != WAIT_OBJECT_0)
				break;
			cnt = 1;
		}

		// ... wait some time for more lines with same prior
		i = evt_index_out;
		prior = evt_priorities[i];
		rest = 0;
		while (cnt < MAXLINES) {
			long timeout =
				evt_timeout * ((1000L * (MAXLINES-cnt+1))/MAXLINES);
			if (WaitForSingleObject(evt_wait_out, timeout) != WAIT_OBJECT_0)
				break;
			if (++i >= MAXLINES)
				i = 0;
			if (evt_priorities[i] != prior) {
				rest = 1;
				break;
			}
			cnt++;
		}

		// Output all in one event log entry
		report_events(cnt);

		// Signal space
		if (!ReleaseSemaphore(evt_wait_in, cnt, NULL))
			break;
		cnt = rest;
	}
	return 0;
}


static void on_exit_event_logger(void)
{
	// Output lines immediate if exiting
	evt_timeout = 0; 
	// Wait for thread to finish
	WaitForSingleObject(evt_hthread, 1000L);
	CloseHandle(evt_hthread);
#if 0
	if (sl_hevtsrc) {
		DeregisterEventSource(sl_hevtsrc); sl_hevtsrc = 0;
	}
#else
	// Leave event message source open to prevent losing messages during shutdown
#endif
}


static int start_event_logger()
{
	DWORD tid;
	evt_timeout = 1;
	if (   !(evt_wait_in  = CreateSemaphore(NULL,  MAXLINES, MAXLINES, NULL))
		|| !(evt_wait_out = CreateSemaphore(NULL,         0, MAXLINES, NULL))) {
		fprintf(stderr,"CreateSemaphore failed, Error=%ld\n", GetLastError());
		return -1;
	}
	if (!(evt_hthread = CreateThread(NULL, 0, event_logger_thread, NULL, 0, &tid))) {
		fprintf(stderr,"CreateThread failed, Error=%ld\n", GetLastError());
		return -1;
	}
	atexit(on_exit_event_logger);
	return 0;
}


// Write lines to event log ring buffer

static void write_event_log(int priority, const char * lines)
{
	int cnt = 0;
	int i;
	for (i = 0; lines[i]; i++) {
		int len = 0;
		while (lines[i+len] && lines[i+len] != '\n')
			len++;
			;
		if (len > 0) {
			// Wait for space
			if (WaitForSingleObject(evt_wait_in, INFINITE) != WAIT_OBJECT_0)
				return;
			// Copy line
			evt_priorities[evt_index_in] = priority;
			memcpy(evt_lines[evt_index_in], lines+i, (len < LINELEN ? len : LINELEN));
			if (len < LINELEN)
				evt_lines[evt_index_in][len] = 0;
			if (++evt_index_in >= MAXLINES)
				evt_index_in = 0;
			// Signal avail if ring buffer full
			if (++cnt >= MAXLINES) {
				ReleaseSemaphore(evt_wait_out, cnt, NULL);
				cnt = 0;
			}
			i += len;
		}
		if (!lines[i])
			break;
	}

	// Signal avail
	if (cnt > 0)
		ReleaseSemaphore(evt_wait_out, cnt, NULL);
	Sleep(1);
}


// Write lines to logfile

static void write_logfile(FILE * f, int priority, const char * lines)
{
	time_t now; char stamp[sizeof("2004-04-04 10:00:00")+13];
	int i;

	now = time((time_t*)0);
	if (!strftime(stamp, sizeof(stamp)-1, "%Y-%m-%d %H:%M:%S", localtime(&now)))
		strcpy(stamp,"?");

	for (i = 0; lines[i]; i++) {
		int len = 0;
		while (lines[i+len] && lines[i+len] != '\n')
			len++;
		if (len > 0) {
			fprintf(f, "%s %s[%s]: %-5s: ",
				stamp, sl_ident, sl_pidstr, pri2text(priority));
			fwrite(lines+i, len, 1, f);
			fputc('\n', f);
			i += len;
		}
		if (!lines[i])
			break;
	}
}


void openlog(const char *ident, int logopt, int facility)
{
	int pid;
	if (sl_logpath[0] || sl_logfile || sl_hevtsrc)
		return; // Already open

	strncpy(sl_ident, ident, sizeof(sl_ident)-1);
	// logopt==LOG_PID assumed
	ARGUSED(logopt);
	pid = getpid();
	if (snprintf(sl_pidstr, sizeof(sl_pidstr)-1, (pid >= 0 ? "%d" : "0x%X"), pid) < 0)
		strcpy(sl_pidstr,"?");

	if (facility == LOG_LOCAL0) // "ident.log"
		strcat(strcpy(sl_logpath, sl_ident), ".log");
	else if (facility == LOG_LOCAL1) // stdout
		sl_logfile = stdout;
	else if (facility == LOG_LOCAL2) // stderr
		sl_logfile = stderr;
	else if (LOG_LOCAL2 < facility && facility <= LOG_LOCAL7) { // "ident[1-5].log"
		snprintf(sl_logpath, sizeof(sl_logpath)-1, "%s%d.log",
			sl_ident, LOG_FAC(facility)-LOG_FAC(LOG_LOCAL2));
	}
	else // Assume LOG_DAEMON, use event log if possible, else "ident.log"
	if (!(sl_hevtsrc = RegisterEventSourceA(NULL/*localhost*/, sl_ident))) {
		// Cannot open => Use logfile
		long err = GetLastError();
		strcat(strcpy(sl_logpath, sl_ident), ".log");
		fprintf(stderr, "%s: Cannot register event source (Error=%ld), writing to %s\n",
			sl_ident, err, sl_logpath);
	}
	else {
		// Start event log thread
		start_event_logger();
	}
	//assert(sl_logpath[0] || sl_logfile || sl_hevtsrc);

}


void closelog()
{
}


void vsyslog(int priority, const char * message, va_list args)
{
	char buffer[1000];

	// Translation of %m to error text not supported yet
	if (strstr(message, "%m"))
		message = "Internal error: \"%%m\" in log message";

	// Format message
	if (vsnprintf(buffer, sizeof(buffer)-1, message, args) < 0)
		strcpy(buffer, "Internal Error: buffer overflow");

	if (sl_hevtsrc) {
		// Write to event log
		write_event_log(priority, buffer);
	}
	else if (sl_logfile) {
		// Write to stdout/err
		write_logfile(sl_logfile, priority, buffer);
		fflush(sl_logfile);
	}
	else if (sl_logpath[0]) {
		// Append to logfile
		FILE * f;
		if (!(f = fopen(sl_logpath, "a")))
			return;
		write_logfile(f, priority, buffer);
		fclose(f);
	}
}


#ifdef TEST
// Test program

void syslog(int priority, const char *message, ...)
{
	va_list args;
	va_start(args, message);
	vsyslog(priority, message, args);
	va_end(args);
}

int main(int argc, char* argv[])
{
	int i;
	openlog(argc < 2 ? "test" : argv[1], LOG_PID, (argc < 3 ? LOG_DAEMON : LOG_LOCAL1));
	syslog(LOG_INFO,    "Info\n");
	syslog(LOG_WARNING, "Warning %d\n\n", 42);
	syslog(LOG_ERR,     "Error %s", "Fatal");
	for (i = 0; i < 100; i++) {
		char buf[LINELEN];
		if (i % 13 == 0)
			Sleep(1000L);
		sprintf(buf, "Log Line %d\n", i);
		syslog(i % 17 ? LOG_INFO : LOG_ERR, buf);
	}
	closelog();
	return 0;
}

#endif
Commit	Line	Data
832b75ed	1	/*
4d59bff9	2	* os_win32/syslog_win32.cpp
832b75ed GG	3	*
	4	* Home page of code is: http://smartmontools.sourceforge.net
	5	*
ee38a438	6	* Copyright (C) 2004-12 Christian Franke <smartmontools-support@lists.sourceforge.net>
832b75ed GG	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2, or (at your option)
	11	* any later version.
	12	*
	13	* You should have received a copy of the GNU General Public License
ee38a438	14	* (for example COPYING); If not, see <http://www.gnu.org/licenses/>.
832b75ed GG	15	*
	16	*/
	17
	18	// Win32 Emulation of syslog() for smartd
	19	// Writes to windows event log on NT4/2000/XP
	20	// (Register syslogevt.exe as event message file)
832b75ed GG	21	// If facility is set to LOG_LOCAL[0-7], log is written to
	22	// file "<ident>.log", stdout, stderr, "<ident>[1-5].log".
	23
	24
	25	#include "syslog.h"
	26
	27	#include <stdlib.h>
	28	#include <stdio.h>
	29	#include <time.h>
	30	#include <errno.h>
	31	#include <process.h> // getpid()
	32
	33	#define WIN32_LEAN_AND_MEAN
	34	#include <windows.h> // RegisterEventSourceA(), ReportEventA(), ...
	35
ee38a438 GI	36	const char *syslog_win32_cpp_cvsid = "$Id: syslog_win32.cpp 3575 2012-07-19 21:32:56Z chrfranke $"
ee38a438 GI	37	SYSLOG_H_CVSID;
832b75ed GG	38
	39	#ifdef _MSC_VER
	40	// MSVC
	41	#define snprintf _snprintf
	42	#define vsnprintf _vsnprintf
	43	#endif
	44
	45	#define ARGUSED(x) ((void)(x))
	46
	47
	48	#ifndef _MT
	49	//MT runtime not necessary, because thread uses no unsafe lib functions
	50	//#error Program must be linked with multithreaded runtime library
	51	#endif
	52
	53
	54	#ifdef TESTEVT
	55	// Redirect event log to stdout for testing
	56
	57	static BOOL Test_ReportEventA(HANDLE h, WORD type, WORD cat, DWORD id, PSID usid,
	58	WORD nstrings, WORD datasize, LPCTSTR * strings, LPVOID data)
	59	{
	60	int i;
	61	printf("%u %lu:%s", type, id, nstrings != 1?"\n":"");
	62	for (i = 0; i < nstrings; i++)
	63	printf(" \"%s\"\n", strings[i]);
	64	fflush(stdout);
	65	return TRUE;
	66	}
	67
	68	HANDLE Test_RegisterEventSourceA(LPCTSTR server, LPCTSTR source)
	69	{
	70	return (HANDLE)42;
	71	}
	72
	73	#define ReportEventA Test_ReportEventA
	74	#define RegisterEventSourceA Test_RegisterEventSourceA
	75	#endif // TESTEVT
	76
	77
	78	// Event message ids,
	79	// should be identical to MSG_SYSLOG* in "syslogevt.h"
	80	// (generated by "mc" from "syslogevt.mc")
	81	#define MSG_SYSLOG 0x00000000L
	82	#define MSG_SYSLOG_01 0x00000001L
	83	// ...
	84	#define MSG_SYSLOG_10 0x0000000AL
	85
	86	static char sl_ident[100];
	87	static char sl_logpath[sizeof(sl_ident) + sizeof("0.log")-1];
	88	static FILE * sl_logfile;
	89	static char sl_pidstr[16];
	90	static HANDLE sl_hevtsrc;
	91
	92
	93	// Ring buffer for event log output via thread
	94	#define MAXLINES 10
	95	#define LINELEN 200
	96
	97	static HANDLE evt_hthread;
	98	static char evt_lines[MAXLINES][LINELEN+1];
	99	static int evt_priorities[MAXLINES];
	100	static volatile int evt_timeout;
	101	static int evt_index_in, evt_index_out;
102	static HANDLE evt_wait_in, evt_wait_out;
103
104
105	// Map syslog priority to event type
106
107	static WORD pri2evtype(int priority)
108	{
109	switch (priority) {
110	default:
111	case LOG_EMERG: case LOG_ALERT:
112	case LOG_CRIT: case LOG_ERR:
113	return EVENTLOG_ERROR_TYPE;
114	case LOG_WARNING:
115	return EVENTLOG_WARNING_TYPE;
116	case LOG_NOTICE: case LOG_INFO:
117	case LOG_DEBUG:
118	return EVENTLOG_INFORMATION_TYPE;
119	}
120	}
121
122
123	// Map syslog priority to string
124
125	static const char * pri2text(int priority)
126	{
127	switch (priority) {
128	case LOG_EMERG: return "EMERG";
129	case LOG_ALERT: return "ALERT";
130	case LOG_CRIT: return "CRIT";
131	default:
132	case LOG_ERR: return "ERROR";
133	case LOG_WARNING: return "Warn";
134	case LOG_NOTICE: return "Note";
135	case LOG_INFO: return "Info";
136	case LOG_DEBUG: return "Debug";
137	}
138	}
139
140
141	// Output cnt events from ring buffer
142
143	static void report_events(int cnt)
144	{
145	const char * msgs[3+MAXLINES];
146
147	int i, pri;
148	if (cnt <= 0)
149	return;
150	if (cnt > MAXLINES)
151	cnt = MAXLINES;
152
153	pri = evt_priorities[evt_index_out];
154
155	msgs[0] = sl_ident;
156	msgs[1] = sl_pidstr;
157	msgs[2] = pri2text(pri);
158	for (i = 0; i < cnt; i++) {
159	//assert(evt_priorities[evt_index_out] == pri);
160	msgs[3+i] = evt_lines[evt_index_out];
161	if (++evt_index_out >= MAXLINES)
162	evt_index_out = 0;
163	}
164	ReportEventA(sl_hevtsrc,
165	pri2evtype(pri), // type
166	0, MSG_SYSLOG+cnt, // category, message id
167	NULL, // no security id
168	(WORD)(3+cnt), 0, // 3+cnt strings, ...
169	msgs, NULL); // ... , no data
170	}
171
172
173	// Thread to combine several syslog lines into one event log entry
174
175	static ULONG WINAPI event_logger_thread(LPVOID arg)
176	{
177	int cnt;
178	ARGUSED(arg);
179
180	cnt = 0;
181	for (;;) {
182	// Wait for first line ...
183	int prior, i, rest;
184	if (cnt == 0) {
185	if (WaitForSingleObject(evt_wait_out, (evt_timeout? INFINITE : 0)) != WAIT_OBJECT_0)
186	break;
187	cnt = 1;
188	}
189
190	// ... wait some time for more lines with same prior
191	i = evt_index_out;
192	prior = evt_priorities[i];
193	rest = 0;
194	while (cnt < MAXLINES) {
195	long timeout =
196	evt_timeout * ((1000L * (MAXLINES-cnt+1))/MAXLINES);
197	if (WaitForSingleObject(evt_wait_out, timeout) != WAIT_OBJECT_0)
198	break;
199	if (++i >= MAXLINES)
200	i = 0;
201	if (evt_priorities[i] != prior) {
202	rest = 1;
203	break;
204	}
205	cnt++;
206	}
207
208	// Output all in one event log entry
209	report_events(cnt);
210
211	// Signal space
212	if (!ReleaseSemaphore(evt_wait_in, cnt, NULL))
213	break;
214	cnt = rest;
215	}
216	return 0;
217	}
218
219
220	static void on_exit_event_logger(void)
221	{
222	// Output lines immediate if exiting
223	evt_timeout = 0;
224	// Wait for thread to finish
225	WaitForSingleObject(evt_hthread, 1000L);
226	CloseHandle(evt_hthread);
227	#if 0
228	if (sl_hevtsrc) {
229	DeregisterEventSource(sl_hevtsrc); sl_hevtsrc = 0;
230	}
231	#else
232	// Leave event message source open to prevent losing messages during shutdown
233	#endif
234	}
235
236
237	static int start_event_logger()
238	{
239	DWORD tid;
240	evt_timeout = 1;
241	if ( !(evt_wait_in = CreateSemaphore(NULL, MAXLINES, MAXLINES, NULL))
242	\|\| !(evt_wait_out = CreateSemaphore(NULL, 0, MAXLINES, NULL))) {
243	fprintf(stderr,"CreateSemaphore failed, Error=%ld\n", GetLastError());
244	return -1;
245	}
246	if (!(evt_hthread = CreateThread(NULL, 0, event_logger_thread, NULL, 0, &tid))) {
247	fprintf(stderr,"CreateThread failed, Error=%ld\n", GetLastError());
248	return -1;
249	}
250	atexit(on_exit_event_logger);
251	return 0;
252	}
253
254
255	// Write lines to event log ring buffer
256
257	static void write_event_log(int priority, const char * lines)
258	{
259	int cnt = 0;
260	int i;
261	for (i = 0; lines[i]; i++) {
262	int len = 0;
263	while (lines[i+len] && lines[i+len] != '\n')
264	len++;
265	;
266	if (len > 0) {
267	// Wait for space
268	if (WaitForSingleObject(evt_wait_in, INFINITE) != WAIT_OBJECT_0)
269	return;
270	// Copy line
271	evt_priorities[evt_index_in] = priority;
272	memcpy(evt_lines[evt_index_in], lines+i, (len < LINELEN ? len : LINELEN));
273	if (len < LINELEN)
274	evt_lines[evt_index_in][len] = 0;
275	if (++evt_index_in >= MAXLINES)
276	evt_index_in = 0;
277	// Signal avail if ring buffer full
278	if (++cnt >= MAXLINES) {
279	ReleaseSemaphore(evt_wait_out, cnt, NULL);
280	cnt = 0;
281	}
282	i += len;
283	}
284	if (!lines[i])
285	break;
286	}
287
288	// Signal avail
289	if (cnt > 0)
290	ReleaseSemaphore(evt_wait_out, cnt, NULL);
291	Sleep(1);
292	}
293
294
295	// Write lines to logfile
296
297	static void write_logfile(FILE * f, int priority, const char * lines)
298	{
299	time_t now; char stamp[sizeof("2004-04-04 10:00:00")+13];
300	int i;
301
302	now = time((time_t*)0);
303	if (!strftime(stamp, sizeof(stamp)-1, "%Y-%m-%d %H:%M:%S", localtime(&now)))
304	strcpy(stamp,"?");
305
306	for (i = 0; lines[i]; i++) {
307	int len = 0;
308	while (lines[i+len] && lines[i+len] != '\n')
309	len++;
310	if (len > 0) {
311	fprintf(f, "%s %s[%s]: %-5s: ",
312	stamp, sl_ident, sl_pidstr, pri2text(priority));
313	fwrite(lines+i, len, 1, f);
314	fputc('\n', f);
315	i += len;
316	}
317	if (!lines[i])
318	break;
319	}
320	}
321
322
323	void openlog(const char *ident, int logopt, int facility)
324	{
325	int pid;
326	if (sl_logpath[0] \|\| sl_logfile \|\| sl_hevtsrc)
327	return; // Already open
328
329	strncpy(sl_ident, ident, sizeof(sl_ident)-1);
330	// logopt==LOG_PID assumed
331	ARGUSED(logopt);
332	pid = getpid();
333	if (snprintf(sl_pidstr, sizeof(sl_pidstr)-1, (pid >= 0 ? "%d" : "0x%X"), pid) < 0)
334	strcpy(sl_pidstr,"?");
335
336	if (facility == LOG_LOCAL0) // "ident.log"
337	strcat(strcpy(sl_logpath, sl_ident), ".log");
338	else if (facility == LOG_LOCAL1) // stdout
339	sl_logfile = stdout;
340	else if (facility == LOG_LOCAL2) // stderr
341	sl_logfile = stderr;
342	else if (LOG_LOCAL2 < facility && facility <= LOG_LOCAL7) { // "ident[1-5].log"
343	snprintf(sl_logpath, sizeof(sl_logpath)-1, "%s%d.log",
344	sl_ident, LOG_FAC(facility)-LOG_FAC(LOG_LOCAL2));
345	}
346	else // Assume LOG_DAEMON, use event log if possible, else "ident.log"
347	if (!(sl_hevtsrc = RegisterEventSourceA(NULL/localhost/, sl_ident))) {
348	// Cannot open => Use logfile
349	long err = GetLastError();
350	strcat(strcpy(sl_logpath, sl_ident), ".log");
ee38a438 GI	351	fprintf(stderr, "%s: Cannot register event source (Error=%ld), writing to %s\n",
ee38a438 GI	352	sl_ident, err, sl_logpath);
832b75ed GG	353	}
	354	else {
	355	// Start event log thread
	356	start_event_logger();
	357	}
	358	//assert(sl_logpath[0] \|\| sl_logfile \|\| sl_hevtsrc);
	359
	360	}
	361
	362
	363	void closelog()
	364	{
	365	}
	366
	367
	368	void vsyslog(int priority, const char * message, va_list args)
	369	{
	370	char buffer[1000];
	371
	372	// Translation of %m to error text not supported yet
	373	if (strstr(message, "%m"))
	374	message = "Internal error: \"%%m\" in log message";
	375
	376	// Format message
	377	if (vsnprintf(buffer, sizeof(buffer)-1, message, args) < 0)
	378	strcpy(buffer, "Internal Error: buffer overflow");
	379
	380	if (sl_hevtsrc) {
	381	// Write to event log
	382	write_event_log(priority, buffer);
	383	}
	384	else if (sl_logfile) {
	385	// Write to stdout/err
	386	write_logfile(sl_logfile, priority, buffer);
	387	fflush(sl_logfile);
	388	}
	389	else if (sl_logpath[0]) {
	390	// Append to logfile
	391	FILE * f;
	392	if (!(f = fopen(sl_logpath, "a")))
	393	return;
	394	write_logfile(f, priority, buffer);
	395	fclose(f);
	396	}
	397	}
	398
	399
	400	#ifdef TEST
	401	// Test program
	402
	403	void syslog(int priority, const char *message, ...)
	404	{
	405	va_list args;
	406	va_start(args, message);
	407	vsyslog(priority, message, args);
	408	va_end(args);
	409	}
	410
	411	int main(int argc, char* argv[])
	412	{
	413	int i;
	414	openlog(argc < 2 ? "test" : argv[1], LOG_PID, (argc < 3 ? LOG_DAEMON : LOG_LOCAL1));
	415	syslog(LOG_INFO, "Info\n");
	416	syslog(LOG_WARNING, "Warning %d\n\n", 42);
417	syslog(LOG_ERR, "Error %s", "Fatal");
418	for (i = 0; i < 100; i++) {
419	char buf[LINELEN];
420	if (i % 13 == 0)
421	Sleep(1000L);
422	sprintf(buf, "Log Line %d\n", i);
423	syslog(i % 17 ? LOG_INFO : LOG_ERR, buf);
424	}
425	closelog();
426	return 0;
427	}
428
429	#endif