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

/*
 * os_win32/syslog_win32.cpp
 *
 * Home page of code is: http://www.smartmontools.org
 *
 * Copyright (C) 2004-15 Christian Franke
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

// 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 4760 2018-08-19 18:45:53Z 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	3	*
6b80b4d2	4	* Home page of code is: http://www.smartmontools.org
832b75ed	5	*
6b80b4d2	6	* Copyright (C) 2004-15 Christian Franke
832b75ed	7	*
ff28b140	8	* SPDX-License-Identifier: GPL-2.0-or-later
832b75ed GG	9	*/
	10
	11	// Win32 Emulation of syslog() for smartd
	12	// Writes to windows event log on NT4/2000/XP
	13	// (Register syslogevt.exe as event message file)
832b75ed GG	14	// If facility is set to LOG_LOCAL[0-7], log is written to
	15	// file "<ident>.log", stdout, stderr, "<ident>[1-5].log".
	16
	17
	18	#include "syslog.h"
	19
	20	#include <stdlib.h>
	21	#include <stdio.h>
	22	#include <time.h>
	23	#include <errno.h>
	24	#include <process.h> // getpid()
	25
	26	#define WIN32_LEAN_AND_MEAN
	27	#include <windows.h> // RegisterEventSourceA(), ReportEventA(), ...
	28
ff28b140	29	const char *syslog_win32_cpp_cvsid = "$Id: syslog_win32.cpp 4760 2018-08-19 18:45:53Z chrfranke $"
ee38a438	30	SYSLOG_H_CVSID;
832b75ed GG	31
	32	#ifdef _MSC_VER
	33	// MSVC
	34	#define snprintf _snprintf
	35	#define vsnprintf _vsnprintf
	36	#endif
	37
	38	#define ARGUSED(x) ((void)(x))
	39
	40
	41	#ifndef _MT
	42	//MT runtime not necessary, because thread uses no unsafe lib functions
	43	//#error Program must be linked with multithreaded runtime library
	44	#endif
	45
	46
	47	#ifdef TESTEVT
	48	// Redirect event log to stdout for testing
	49
	50	static BOOL Test_ReportEventA(HANDLE h, WORD type, WORD cat, DWORD id, PSID usid,
	51	WORD nstrings, WORD datasize, LPCTSTR * strings, LPVOID data)
	52	{
	53	int i;
	54	printf("%u %lu:%s", type, id, nstrings != 1?"\n":"");
	55	for (i = 0; i < nstrings; i++)
	56	printf(" \"%s\"\n", strings[i]);
	57	fflush(stdout);
	58	return TRUE;
	59	}
	60
	61	HANDLE Test_RegisterEventSourceA(LPCTSTR server, LPCTSTR source)
	62	{
	63	return (HANDLE)42;
	64	}
	65
	66	#define ReportEventA Test_ReportEventA
	67	#define RegisterEventSourceA Test_RegisterEventSourceA
	68	#endif // TESTEVT
	69
	70
	71	// Event message ids,
	72	// should be identical to MSG_SYSLOG* in "syslogevt.h"
	73	// (generated by "mc" from "syslogevt.mc")
	74	#define MSG_SYSLOG 0x00000000L
	75	#define MSG_SYSLOG_01 0x00000001L
	76	// ...
	77	#define MSG_SYSLOG_10 0x0000000AL
	78
	79	static char sl_ident[100];
	80	static char sl_logpath[sizeof(sl_ident) + sizeof("0.log")-1];
	81	static FILE * sl_logfile;
	82	static char sl_pidstr[16];
	83	static HANDLE sl_hevtsrc;
	84
	85
	86	// Ring buffer for event log output via thread
	87	#define MAXLINES 10
	88	#define LINELEN 200
	89
	90	static HANDLE evt_hthread;
	91	static char evt_lines[MAXLINES][LINELEN+1];
	92	static int evt_priorities[MAXLINES];
	93	static volatile int evt_timeout;
	94	static int evt_index_in, evt_index_out;
95	static HANDLE evt_wait_in, evt_wait_out;
96
97
98	// Map syslog priority to event type
99
100	static WORD pri2evtype(int priority)
101	{
102	switch (priority) {
103	default:
104	case LOG_EMERG: case LOG_ALERT:
105	case LOG_CRIT: case LOG_ERR:
106	return EVENTLOG_ERROR_TYPE;
107	case LOG_WARNING:
108	return EVENTLOG_WARNING_TYPE;
109	case LOG_NOTICE: case LOG_INFO:
110	case LOG_DEBUG:
111	return EVENTLOG_INFORMATION_TYPE;
112	}
113	}
114
115
116	// Map syslog priority to string
117
118	static const char * pri2text(int priority)
119	{
120	switch (priority) {
121	case LOG_EMERG: return "EMERG";
122	case LOG_ALERT: return "ALERT";
123	case LOG_CRIT: return "CRIT";
124	default:
125	case LOG_ERR: return "ERROR";
126	case LOG_WARNING: return "Warn";
127	case LOG_NOTICE: return "Note";
128	case LOG_INFO: return "Info";
129	case LOG_DEBUG: return "Debug";
130	}
131	}
132
133
134	// Output cnt events from ring buffer
135
136	static void report_events(int cnt)
137	{
138	const char * msgs[3+MAXLINES];
139
140	int i, pri;
141	if (cnt <= 0)
142	return;
143	if (cnt > MAXLINES)
144	cnt = MAXLINES;
145
146	pri = evt_priorities[evt_index_out];
147
148	msgs[0] = sl_ident;
149	msgs[1] = sl_pidstr;
150	msgs[2] = pri2text(pri);
151	for (i = 0; i < cnt; i++) {
152	//assert(evt_priorities[evt_index_out] == pri);
153	msgs[3+i] = evt_lines[evt_index_out];
154	if (++evt_index_out >= MAXLINES)
155	evt_index_out = 0;
156	}
157	ReportEventA(sl_hevtsrc,
158	pri2evtype(pri), // type
159	0, MSG_SYSLOG+cnt, // category, message id
160	NULL, // no security id
161	(WORD)(3+cnt), 0, // 3+cnt strings, ...
162	msgs, NULL); // ... , no data
163	}
164
165
166	// Thread to combine several syslog lines into one event log entry
167
168	static ULONG WINAPI event_logger_thread(LPVOID arg)
169	{
170	int cnt;
171	ARGUSED(arg);
172
173	cnt = 0;
174	for (;;) {
175	// Wait for first line ...
176	int prior, i, rest;
177	if (cnt == 0) {
178	if (WaitForSingleObject(evt_wait_out, (evt_timeout? INFINITE : 0)) != WAIT_OBJECT_0)
179	break;
180	cnt = 1;
181	}
182
183	// ... wait some time for more lines with same prior
184	i = evt_index_out;
185	prior = evt_priorities[i];
186	rest = 0;
187	while (cnt < MAXLINES) {
188	long timeout =
189	evt_timeout * ((1000L * (MAXLINES-cnt+1))/MAXLINES);
190	if (WaitForSingleObject(evt_wait_out, timeout) != WAIT_OBJECT_0)
191	break;
192	if (++i >= MAXLINES)
193	i = 0;
194	if (evt_priorities[i] != prior) {
195	rest = 1;
196	break;
197	}
198	cnt++;
199	}
200
201	// Output all in one event log entry
202	report_events(cnt);
203
204	// Signal space
205	if (!ReleaseSemaphore(evt_wait_in, cnt, NULL))
206	break;
207	cnt = rest;
208	}
209	return 0;
210	}
211
212
213	static void on_exit_event_logger(void)
214	{
215	// Output lines immediate if exiting
216	evt_timeout = 0;
217	// Wait for thread to finish
218	WaitForSingleObject(evt_hthread, 1000L);
219	CloseHandle(evt_hthread);
220	#if 0
221	if (sl_hevtsrc) {
222	DeregisterEventSource(sl_hevtsrc); sl_hevtsrc = 0;
223	}
224	#else
225	// Leave event message source open to prevent losing messages during shutdown
226	#endif
227	}
228
229
230	static int start_event_logger()
231	{
232	DWORD tid;
233	evt_timeout = 1;
234	if ( !(evt_wait_in = CreateSemaphore(NULL, MAXLINES, MAXLINES, NULL))
235	\|\| !(evt_wait_out = CreateSemaphore(NULL, 0, MAXLINES, NULL))) {
236	fprintf(stderr,"CreateSemaphore failed, Error=%ld\n", GetLastError());
237	return -1;
238	}
239	if (!(evt_hthread = CreateThread(NULL, 0, event_logger_thread, NULL, 0, &tid))) {
240	fprintf(stderr,"CreateThread failed, Error=%ld\n", GetLastError());
241	return -1;
242	}
243	atexit(on_exit_event_logger);
244	return 0;
245	}
246
247
248	// Write lines to event log ring buffer
249
250	static void write_event_log(int priority, const char * lines)
251	{
252	int cnt = 0;
253	int i;
254	for (i = 0; lines[i]; i++) {
255	int len = 0;
256	while (lines[i+len] && lines[i+len] != '\n')
257	len++;
258	;
259	if (len > 0) {
260	// Wait for space
261	if (WaitForSingleObject(evt_wait_in, INFINITE) != WAIT_OBJECT_0)
262	return;
263	// Copy line
264	evt_priorities[evt_index_in] = priority;
265	memcpy(evt_lines[evt_index_in], lines+i, (len < LINELEN ? len : LINELEN));
266	if (len < LINELEN)
267	evt_lines[evt_index_in][len] = 0;
268	if (++evt_index_in >= MAXLINES)
269	evt_index_in = 0;
270	// Signal avail if ring buffer full
271	if (++cnt >= MAXLINES) {
272	ReleaseSemaphore(evt_wait_out, cnt, NULL);
273	cnt = 0;
274	}
275	i += len;
276	}
277	if (!lines[i])
278	break;
279	}
280
281	// Signal avail
282	if (cnt > 0)
283	ReleaseSemaphore(evt_wait_out, cnt, NULL);
284	Sleep(1);
285	}
286
287
288	// Write lines to logfile
289
290	static void write_logfile(FILE * f, int priority, const char * lines)
291	{
292	time_t now; char stamp[sizeof("2004-04-04 10:00:00")+13];
293	int i;
294
295	now = time((time_t*)0);
296	if (!strftime(stamp, sizeof(stamp)-1, "%Y-%m-%d %H:%M:%S", localtime(&now)))
297	strcpy(stamp,"?");
298
299	for (i = 0; lines[i]; i++) {
300	int len = 0;
301	while (lines[i+len] && lines[i+len] != '\n')
302	len++;
303	if (len > 0) {
304	fprintf(f, "%s %s[%s]: %-5s: ",
305	stamp, sl_ident, sl_pidstr, pri2text(priority));
306	fwrite(lines+i, len, 1, f);
307	fputc('\n', f);
308	i += len;
309	}
310	if (!lines[i])
311	break;
312	}
313	}
314
315
316	void openlog(const char *ident, int logopt, int facility)
317	{
318	int pid;
319	if (sl_logpath[0] \|\| sl_logfile \|\| sl_hevtsrc)
320	return; // Already open
321
322	strncpy(sl_ident, ident, sizeof(sl_ident)-1);
323	// logopt==LOG_PID assumed
324	ARGUSED(logopt);
325	pid = getpid();
326	if (snprintf(sl_pidstr, sizeof(sl_pidstr)-1, (pid >= 0 ? "%d" : "0x%X"), pid) < 0)
327	strcpy(sl_pidstr,"?");
328
329	if (facility == LOG_LOCAL0) // "ident.log"
330	strcat(strcpy(sl_logpath, sl_ident), ".log");
331	else if (facility == LOG_LOCAL1) // stdout
332	sl_logfile = stdout;
333	else if (facility == LOG_LOCAL2) // stderr
334	sl_logfile = stderr;
335	else if (LOG_LOCAL2 < facility && facility <= LOG_LOCAL7) { // "ident[1-5].log"
336	snprintf(sl_logpath, sizeof(sl_logpath)-1, "%s%d.log",
337	sl_ident, LOG_FAC(facility)-LOG_FAC(LOG_LOCAL2));
338	}
339	else // Assume LOG_DAEMON, use event log if possible, else "ident.log"
340	if (!(sl_hevtsrc = RegisterEventSourceA(NULL/localhost/, sl_ident))) {
341	// Cannot open => Use logfile
342	long err = GetLastError();
343	strcat(strcpy(sl_logpath, sl_ident), ".log");
ee38a438 GI	344	fprintf(stderr, "%s: Cannot register event source (Error=%ld), writing to %s\n",
ee38a438 GI	345	sl_ident, err, sl_logpath);
832b75ed GG	346	}
	347	else {
	348	// Start event log thread
	349	start_event_logger();
	350	}
	351	//assert(sl_logpath[0] \|\| sl_logfile \|\| sl_hevtsrc);
	352
	353	}
	354
	355
	356	void closelog()
	357	{
	358	}
	359
	360
	361	void vsyslog(int priority, const char * message, va_list args)
	362	{
	363	char buffer[1000];
	364
	365	// Translation of %m to error text not supported yet
	366	if (strstr(message, "%m"))
	367	message = "Internal error: \"%%m\" in log message";
	368
	369	// Format message
	370	if (vsnprintf(buffer, sizeof(buffer)-1, message, args) < 0)
	371	strcpy(buffer, "Internal Error: buffer overflow");
	372
	373	if (sl_hevtsrc) {
	374	// Write to event log
	375	write_event_log(priority, buffer);
	376	}
	377	else if (sl_logfile) {
	378	// Write to stdout/err
	379	write_logfile(sl_logfile, priority, buffer);
	380	fflush(sl_logfile);
	381	}
	382	else if (sl_logpath[0]) {
	383	// Append to logfile
	384	FILE * f;
	385	if (!(f = fopen(sl_logpath, "a")))
	386	return;
	387	write_logfile(f, priority, buffer);
	388	fclose(f);
	389	}
	390	}
	391
	392
	393	#ifdef TEST
	394	// Test program
	395
	396	void syslog(int priority, const char *message, ...)
	397	{
	398	va_list args;
	399	va_start(args, message);
	400	vsyslog(priority, message, args);
	401	va_end(args);
	402	}
	403
	404	int main(int argc, char* argv[])
	405	{
	406	int i;
	407	openlog(argc < 2 ? "test" : argv[1], LOG_PID, (argc < 3 ? LOG_DAEMON : LOG_LOCAL1));
	408	syslog(LOG_INFO, "Info\n");
	409	syslog(LOG_WARNING, "Warning %d\n\n", 42);
410	syslog(LOG_ERR, "Error %s", "Fatal");
411	for (i = 0; i < 100; i++) {
412	char buf[LINELEN];
413	if (i % 13 == 0)
414	Sleep(1000L);
415	sprintf(buf, "Log Line %d\n", i);
6b80b4d2	416	syslog((i % 17) ? LOG_INFO : LOG_ERR, buf);
832b75ed GG	417	}
	418	closelog();
	419	return 0;
	420	}
	421
	422	#endif