summaryrefslogtreecommitdiff
path: root/os/log.c
blob: 3961b0b9f5693577d8464d329848e58184110916 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
/*

Copyright 1987, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from The Open Group.


Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
Copyright 1994 Quarterdeck Office Systems.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Digital and
Quarterdeck not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.

DIGITAL AND QUARTERDECK DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT
OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE
OR PERFORMANCE OF THIS SOFTWARE.

*/

/*
 * Copyright (c) 1997-2003 by The XFree86 Project, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of the copyright holder(s)
 * and author(s) shall not be used in advertising or otherwise to promote
 * the sale, use or other dealings in this Software without prior written
 * authorization from the copyright holder(s) and author(s).
 */


#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <X11/Xos.h>
#include <stdio.h>
#include <time.h>
#include <sys/stat.h>
#include <stdarg.h>
#include <stdlib.h>	/* for malloc() */
#include <errno.h>

#include "input.h"
#include "site.h"
#include "opaque.h"

#ifdef WIN32
#include <process.h>
#define getpid(x) _getpid(x)
#endif

#ifdef XF86BIGFONT
#define _XF86BIGFONT_SERVER_
#include <X11/extensions/xf86bigfont.h>
#endif

#ifdef DDXOSVERRORF
void (*OsVendorVErrorFProc)(const char *, va_list args) = NULL;
#endif

static FILE *logFile = NULL;
static Bool logFlush = FALSE;
static Bool logSync = FALSE;
static int logVerbosity = DEFAULT_LOG_VERBOSITY;
static int logFileVerbosity = DEFAULT_LOG_FILE_VERBOSITY;

/* Buffer to information logged before the log file is opened. */
static char *saveBuffer = NULL;
static int bufferSize = 0, bufferUnused = 0, bufferPos = 0;
static Bool needBuffer = TRUE;

/* Prefix strings for log messages. */
#ifndef X_UNKNOWN_STRING
#define X_UNKNOWN_STRING		"(\?\?)"
#endif
#ifndef X_PROBE_STRING
#define X_PROBE_STRING			"(--)"
#endif
#ifndef X_CONFIG_STRING
#define X_CONFIG_STRING			"(**)"
#endif
#ifndef X_DEFAULT_STRING
#define X_DEFAULT_STRING		"(==)"
#endif
#ifndef X_CMDLINE_STRING
#define X_CMDLINE_STRING		"(++)"
#endif
#ifndef X_NOTICE_STRING
#define X_NOTICE_STRING			"(!!)"
#endif
#ifndef X_ERROR_STRING
#define X_ERROR_STRING			"(EE)"
#endif
#ifndef X_WARNING_STRING
#define X_WARNING_STRING		"(WW)"
#endif
#ifndef X_INFO_STRING
#define X_INFO_STRING			"(II)"
#endif
#ifndef X_NOT_IMPLEMENTED_STRING
#define X_NOT_IMPLEMENTED_STRING	"(NI)"
#endif

/*
 * LogInit is called to start logging to a file.  It is also called (with
 * NULL arguments) when logging to a file is not wanted.  It must always be
 * called, otherwise log messages will continue to accumulate in a buffer.
 *
 * %s, if present in the fname or backup strings, is expanded to the display
 * string.
 */

const char *
LogInit(const char *fname, const char *backup)
{
    char *logFileName = NULL;

    if (fname && *fname) {
	/* xalloc() can't be used yet. */
	logFileName = malloc(strlen(fname) + strlen(display) + 1);
	if (!logFileName)
	    FatalError("Cannot allocate space for the log file name\n");
	sprintf(logFileName, fname, display);

	if (backup && *backup) {
	    struct stat buf;

	    if (!stat(logFileName, &buf) && S_ISREG(buf.st_mode)) {
		char *suffix;
		char *oldLog;

		oldLog = malloc(strlen(logFileName) + strlen(backup) +
				strlen(display) + 1);
		suffix = malloc(strlen(backup) + strlen(display) + 1);
		if (!oldLog || !suffix)
		    FatalError("Cannot allocate space for the log file name\n");
		sprintf(suffix, backup, display);
		sprintf(oldLog, "%s%s", logFileName, suffix);
		free(suffix);
		if (rename(logFileName, oldLog) == -1) {
		    FatalError("Cannot move old log file (\"%s\" to \"%s\"\n",
			       logFileName, oldLog);
		}
		free(oldLog);
	    }
	}
	if ((logFile = fopen(logFileName, "w")) == NULL)
	    FatalError("Cannot open log file \"%s\"\n", logFileName);
	setvbuf(logFile, NULL, _IONBF, 0);

	/* Flush saved log information. */
	if (saveBuffer && bufferSize > 0) {
	    fwrite(saveBuffer, bufferPos, 1, logFile);
	    fflush(logFile);
#ifndef WIN32
	    fsync(fileno(logFile));
#endif
	}
    }

    /*
     * Unconditionally free the buffer, and flag that the buffer is no longer
     * needed.
     */
    if (saveBuffer && bufferSize > 0) {
	free(saveBuffer);	/* Must be free(), not xfree() */
	saveBuffer = NULL;
	bufferSize = 0;
    }
    needBuffer = FALSE;

    return logFileName;
}

void
LogClose(void)
{
    if (logFile) {
	fclose(logFile);
	logFile = NULL;
    }
}

Bool
LogSetParameter(LogParameter param, int value)
{
    switch (param) {
    case XLOG_FLUSH:
	logFlush = value ? TRUE : FALSE;
	return TRUE;
    case XLOG_SYNC:
	logSync = value ? TRUE : FALSE;
	return TRUE;
    case XLOG_VERBOSITY:
	logVerbosity = value;
	return TRUE;
    case XLOG_FILE_VERBOSITY:
	logFileVerbosity = value;
	return TRUE;
    default:
	return FALSE;
    }
}

/* This function does the actual log message writes. */

void
LogVWrite(int verb, const char *f, va_list args)
{
    static char tmpBuffer[1024];
    int len = 0;

    /*
     * Since a va_list can only be processed once, write the string to a
     * buffer, and then write the buffer out to the appropriate output
     * stream(s).
     */
    if (verb < 0 || logFileVerbosity >= verb || logVerbosity >= verb) {
	vsnprintf(tmpBuffer, sizeof(tmpBuffer), f, args);
	len = strlen(tmpBuffer);
    }
    if ((verb < 0 || logVerbosity >= verb) && len > 0)
	fwrite(tmpBuffer, len, 1, stderr);
    if ((verb < 0 || logFileVerbosity >= verb) && len > 0) {
	if (logFile) {
	    fwrite(tmpBuffer, len, 1, logFile);
	    if (logFlush) {
		fflush(logFile);
#ifndef WIN32
		if (logSync)
		    fsync(fileno(logFile));
#endif
	    }
	} else if (needBuffer) {
	    /*
	     * Note, this code is used before OsInit() has been called, so
	     * xalloc() and friends can't be used.
	     */
	    if (len > bufferUnused) {
		bufferSize += 1024;
		bufferUnused += 1024;
		if (saveBuffer)
		    saveBuffer = realloc(saveBuffer, bufferSize);
		else
		    saveBuffer = malloc(bufferSize);
		if (!saveBuffer)
		    FatalError("realloc() failed while saving log messages\n");
	    }
	    bufferUnused -= len;
	    memcpy(saveBuffer + bufferPos, tmpBuffer, len);
	    bufferPos += len;
	}
    }
}

void
LogWrite(int verb, const char *f, ...)
{
    va_list args;

    va_start(args, f);
    LogVWrite(verb, f, args);
    va_end(args);
}

void
LogVMessageVerb(MessageType type, int verb, const char *format, va_list args)
{
    const char *s  = X_UNKNOWN_STRING;
    char *tmpBuf = NULL;

    /* Ignore verbosity for X_ERROR */
    if (logVerbosity >= verb || logFileVerbosity >= verb || type == X_ERROR) {
	switch (type) {
	case X_PROBED:
	    s = X_PROBE_STRING;
	    break;
	case X_CONFIG:
	    s = X_CONFIG_STRING;
	    break;
	case X_DEFAULT:
	    s = X_DEFAULT_STRING;
	    break;
	case X_CMDLINE:
	    s = X_CMDLINE_STRING;
	    break;
	case X_NOTICE:
	    s = X_NOTICE_STRING;
	    break;
	case X_ERROR:
	    s = X_ERROR_STRING;
	    if (verb > 0)
		verb = 0;
	    break;
	case X_WARNING:
	    s = X_WARNING_STRING;
	    break;
	case X_INFO:
	    s = X_INFO_STRING;
	    break;
	case X_NOT_IMPLEMENTED:
	    s = X_NOT_IMPLEMENTED_STRING;
	    break;
	case X_UNKNOWN:
	    s = X_UNKNOWN_STRING;
	    break;
	case X_NONE:
	    s = NULL;
	    break;
	}

	/*
	 * Prefix the format string with the message type.  We do it this way
	 * so that LogVWrite() is only called once per message.
	 */
	if (s) {
	    tmpBuf = malloc(strlen(format) + strlen(s) + 1 + 1);
	    /* Silently return if malloc fails here. */
	    if (!tmpBuf)
		return;
	    sprintf(tmpBuf, "%s ", s);
	    strcat(tmpBuf, format);
	    LogVWrite(verb, tmpBuf, args);
	    free(tmpBuf);
	} else
	    LogVWrite(verb, format, args);
    }
}

/* Log message with verbosity level specified. */
void
LogMessageVerb(MessageType type, int verb, const char *format, ...)
{
    va_list ap;

    va_start(ap, format);
    LogVMessageVerb(type, verb, format, ap);
    va_end(ap);
}

/* Log a message with the standard verbosity level of 1. */
void
LogMessage(MessageType type, const char *format, ...)
{
    va_list ap;

    va_start(ap, format);
    LogVMessageVerb(type, 1, format, ap);
    va_end(ap);
}

#ifdef __GNUC__
void AbortServer(void) __attribute__((noreturn));
#endif

void
AbortServer(void)
{
#ifdef XF86BIGFONT
    XF86BigfontCleanup();
#endif
    CloseWellKnownConnections();
    OsCleanup(TRUE);
    CloseDownDevices();
    AbortDDX();
    fflush(stderr);
    if (CoreDump)
	abort();
    exit (1);
}

#define AUDIT_PREFIX "AUDIT: %s: %ld: "
#ifndef AUDIT_TIMEOUT
#define AUDIT_TIMEOUT ((CARD32)(120 * 1000)) /* 2 mn */
#endif

static int nrepeat = 0;
static int oldlen = -1;
static OsTimerPtr auditTimer = NULL;

void
FreeAuditTimer(void)
{
    if (auditTimer != NULL) {
	/* Force output of pending messages */
	TimerForce(auditTimer);
	TimerFree(auditTimer);
	auditTimer = NULL;
    }
}

static char *
AuditPrefix(void)
{
    time_t tm;
    char *autime, *s;
    char *tmpBuf;
    int len;

    time(&tm);
    autime = ctime(&tm);
    if ((s = strchr(autime, '\n')))
	*s = '\0';
    len = strlen(AUDIT_PREFIX) + strlen(autime) + 10 + 1;
    tmpBuf = malloc(len);
    if (!tmpBuf)
	return NULL;
    snprintf(tmpBuf, len, AUDIT_PREFIX, autime, (unsigned long)getpid());
    return tmpBuf;
}

void
AuditF(const char * f, ...)
{
    va_list args;

    va_start(args, f);

    VAuditF(f, args);
    va_end(args);
}

static CARD32
AuditFlush(OsTimerPtr timer, CARD32 now, pointer arg)
{
    char *prefix;

    if (nrepeat > 0) {
	prefix = AuditPrefix();
	ErrorF("%slast message repeated %d times\n",
	       prefix != NULL ? prefix : "", nrepeat);
	nrepeat = 0;
	if (prefix != NULL)
	    free(prefix);
	return AUDIT_TIMEOUT;
    } else {
	/* if the timer expires without anything to print, flush the message */
	oldlen = -1;
	return 0;
    }
}

void
VAuditF(const char *f, va_list args)
{
    char *prefix;
    char buf[1024];
    int len;
    static char oldbuf[1024];

    prefix = AuditPrefix();
    len = vsnprintf(buf, sizeof(buf), f, args);

    if (len == oldlen && strcmp(buf, oldbuf) == 0) {
	/* Message already seen */
	nrepeat++;
    } else {
	/* new message */
	if (auditTimer != NULL)
	    TimerForce(auditTimer);
	ErrorF("%s%s", prefix != NULL ? prefix : "", buf);
	strlcpy(oldbuf, buf, sizeof(oldbuf));
	oldlen = len;
	nrepeat = 0;
	auditTimer = TimerSet(auditTimer, 0, AUDIT_TIMEOUT, AuditFlush, NULL);
    }
    if (prefix != NULL)
	free(prefix);
}

void
FatalError(const char *f, ...)
{
    va_list args;
    static Bool beenhere = FALSE;

    if (beenhere)
	ErrorF("\nFatalError re-entered, aborting\n");
    else
	ErrorF("\nFatal server error:\n");

    va_start(args, f);
    VErrorF(f, args);
    va_end(args);
    ErrorF("\n");
    if (!beenhere)
	OsVendorFatalError();
    if (!beenhere) {
	beenhere = TRUE;
	AbortServer();
    } else
	abort();
    /*NOTREACHED*/
}

void
VErrorF(const char *f, va_list args)
{
#ifdef DDXOSVERRORF
    if (OsVendorVErrorFProc)
	OsVendorVErrorFProc(f, args);
    else
	LogVWrite(-1, f, args);
#else
    LogVWrite(-1, f, args);
#endif
}

void
ErrorF(const char * f, ...)
{
    va_list args;

    va_start(args, f);
    VErrorF(f, args);
    va_end(args);
}

/* A perror() workalike. */

void
Error(char *str)
{
    char *err = NULL;
    int saveErrno = errno;

    if (str) {
	err = malloc(strlen(strerror(saveErrno)) + strlen(str) + 2 + 1);
	if (!err)
	    return;
	sprintf(err, "%s: ", str);
	strcat(err, strerror(saveErrno));
	LogWrite(-1, "%s", err);
	free(err);
    } else
	LogWrite(-1, "%s", strerror(saveErrno));
}

void
LogPrintMarkers(void)
{
    /* Show what the message marker symbols mean. */
    ErrorF("Markers: ");
    LogMessageVerb(X_PROBED, -1, "probed, ");
    LogMessageVerb(X_CONFIG, -1, "from config file, ");
    LogMessageVerb(X_DEFAULT, -1, "default setting,\n\t");
    LogMessageVerb(X_CMDLINE, -1, "from command line, ");
    LogMessageVerb(X_NOTICE, -1, "notice, ");
    LogMessageVerb(X_INFO, -1, "informational,\n\t");
    LogMessageVerb(X_WARNING, -1, "warning, ");
    LogMessageVerb(X_ERROR, -1, "error, ");
    LogMessageVerb(X_NOT_IMPLEMENTED, -1, "not implemented, ");
    LogMessageVerb(X_UNKNOWN, -1, "unknown.\n");
}