summaryrefslogtreecommitdiffstats
path: root/lib/libpjdlog/pjdlog.c
blob: 84615faccd27bd4925527c0c2e8c75b05157de97 (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
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
/*-
 * Copyright (c) 2009-2010 The FreeBSD Foundation
 * Copyright (c) 2011 Pawel Jakub Dawidek <pjd@FreeBSD.org>
 * All rights reserved.
 *
 * This software was developed by Pawel Jakub Dawidek under sponsorship from
 * the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <assert.h>
#include <errno.h>
#include <libutil.h>
#include <limits.h>
#include <printf.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>

#ifdef notyet
#include <robustio.h>
#endif

#include "pjdlog.h"

#ifndef	MAX
#define	MAX(a, b)	((a) > (b) ? (a) : (b))
#endif

#define	PJDLOG_MAX_MSGSIZE	4096

#define	PJDLOG_PREFIX_STACK	4
#define	PJDLOG_PREFIX_MAXSIZE	128

#define	PJDLOG_NEVER_INITIALIZED	0
#define	PJDLOG_NOT_INITIALIZED		1
#define	PJDLOG_INITIALIZED		2

static int pjdlog_initialized = PJDLOG_NEVER_INITIALIZED;
static int pjdlog_mode, pjdlog_debug_level, pjdlog_sock;
static int pjdlog_prefix_current;
static char pjdlog_prefix[PJDLOG_PREFIX_STACK][PJDLOG_PREFIX_MAXSIZE];

static int
pjdlog_printf_arginfo_humanized_number(const struct printf_info *pi __unused,
    size_t n, int *argt)
{

	assert(n >= 1);
	argt[0] = PA_INT | PA_FLAG_INTMAX;
	return (1);
}

static int
pjdlog_printf_render_humanized_number(struct __printf_io *io,
    const struct printf_info *pi, const void * const *arg)
{
	char buf[5];
	intmax_t num;
	int ret;

	num = *(const intmax_t *)arg[0];
	humanize_number(buf, sizeof(buf), (int64_t)num, "", HN_AUTOSCALE,
	    HN_NOSPACE | HN_DECIMAL);
	ret = __printf_out(io, pi, buf, strlen(buf));
	__printf_flush(io);
	return (ret);
}

static int
pjdlog_printf_arginfo_sockaddr(const struct printf_info *pi __unused,
    size_t n, int *argt)
{

	assert(n >= 1);
	argt[0] = PA_POINTER;
	return (1);
}

static int
pjdlog_printf_render_sockaddr_ip(struct __printf_io *io,
    const struct printf_info *pi, const void * const *arg)
{
	const struct sockaddr_storage *ss;
	char addr[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)];
	int ret;

	ss = *(const struct sockaddr_storage * const *)arg[0];
	switch (ss->ss_family) {
	case AF_INET:
	    {
		const struct sockaddr_in *sin;

		sin = (const struct sockaddr_in *)ss;
		if (inet_ntop(ss->ss_family, &sin->sin_addr, addr,
		    sizeof(addr)) == NULL) {
			PJDLOG_ABORT("inet_ntop(AF_INET) failed: %s.",
			    strerror(errno));
		}
		break;
	    }
	case AF_INET6:
	    {
		const struct sockaddr_in6 *sin;

		sin = (const struct sockaddr_in6 *)ss;
		if (inet_ntop(ss->ss_family, &sin->sin6_addr, addr,
		    sizeof(addr)) == NULL) {
			PJDLOG_ABORT("inet_ntop(AF_INET6) failed: %s.",
			    strerror(errno));
		}
		break;
	    }
	default:
		snprintf(addr, sizeof(addr), "[unsupported family %hhu]",
		    ss->ss_family);
		break;
	}
	ret = __printf_out(io, pi, addr, strlen(addr));
	__printf_flush(io);
	return (ret);
}

static int
pjdlog_printf_render_sockaddr(struct __printf_io *io,
    const struct printf_info *pi, const void * const *arg)
{
	const struct sockaddr_storage *ss;
	char buf[PATH_MAX];
	int ret;

	ss = *(const struct sockaddr_storage * const *)arg[0];
	switch (ss->ss_family) {
	case AF_UNIX:
	    {
		const struct sockaddr_un *sun;

		sun = (const struct sockaddr_un *)ss;
		if (sun->sun_path[0] == '\0')
			snprintf(buf, sizeof(buf), "N/A");
		else
			snprintf(buf, sizeof(buf), "%s", sun->sun_path);
		break;
	    }
	case AF_INET:
	    {
		char addr[INET_ADDRSTRLEN];
		const struct sockaddr_in *sin;
		unsigned int port;

		sin = (const struct sockaddr_in *)ss;
		port = ntohs(sin->sin_port);
		if (inet_ntop(ss->ss_family, &sin->sin_addr, addr,
		    sizeof(addr)) == NULL) {
			PJDLOG_ABORT("inet_ntop(AF_INET) failed: %s.",
			    strerror(errno));
		}
		snprintf(buf, sizeof(buf), "%s:%u", addr, port);
		break;
	    }
	case AF_INET6:
	    {
		char addr[INET6_ADDRSTRLEN];
		const struct sockaddr_in6 *sin;
		unsigned int port;

		sin = (const struct sockaddr_in6 *)ss;
		port = ntohs(sin->sin6_port);
		if (inet_ntop(ss->ss_family, &sin->sin6_addr, addr,
		    sizeof(addr)) == NULL) {
			PJDLOG_ABORT("inet_ntop(AF_INET6) failed: %s.",
			    strerror(errno));
		}
		snprintf(buf, sizeof(buf), "[%s]:%u", addr, port);
		break;
	    }
	default:
		snprintf(buf, sizeof(buf), "[unsupported family %hhu]",
		    ss->ss_family);
		break;
	}
	ret = __printf_out(io, pi, buf, strlen(buf));
	__printf_flush(io);
	return (ret);
}

void
pjdlog_init(int mode)
{
	int saved_errno;

	assert(pjdlog_initialized == PJDLOG_NEVER_INITIALIZED ||
	    pjdlog_initialized == PJDLOG_NOT_INITIALIZED);
#ifdef notyet
	assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG ||
	    mode == PJDLOG_MODE_SOCK);
#else
	assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG);
#endif

	saved_errno = errno;

	if (pjdlog_initialized == PJDLOG_NEVER_INITIALIZED) {
		__use_xprintf = 1;
		register_printf_render_std("T");
		register_printf_render('N',
		    pjdlog_printf_render_humanized_number,
		    pjdlog_printf_arginfo_humanized_number);
		register_printf_render('I',
		    pjdlog_printf_render_sockaddr_ip,
		    pjdlog_printf_arginfo_sockaddr);
		register_printf_render('S',
		    pjdlog_printf_render_sockaddr,
		    pjdlog_printf_arginfo_sockaddr);
	}

	if (mode == PJDLOG_MODE_SYSLOG)
		openlog(NULL, LOG_PID | LOG_NDELAY, LOG_LOCAL0);
	pjdlog_mode = mode;
	pjdlog_debug_level = 0;
	pjdlog_prefix_current = 0;
	pjdlog_prefix[0][0] = '\0';

	pjdlog_initialized = PJDLOG_INITIALIZED;
	pjdlog_sock = -1;

	errno = saved_errno;
}

void
pjdlog_fini(void)
{
	int saved_errno;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	saved_errno = errno;

	if (pjdlog_mode == PJDLOG_MODE_SYSLOG)
		closelog();

	pjdlog_initialized = PJDLOG_NOT_INITIALIZED;
	pjdlog_sock = -1;

	errno = saved_errno;
}

/*
 * Configure where the logs should go.
 * By default they are send to stdout/stderr, but after going into background
 * (eg. by calling daemon(3)) application is responsible for changing mode to
 * PJDLOG_MODE_SYSLOG, so logs will be send to syslog.
 */
void
pjdlog_mode_set(int mode)
{
	int saved_errno;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
#ifdef notyet
	assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG ||
	    mode == PJDLOG_MODE_SOCK);
#else
	assert(mode == PJDLOG_MODE_STD || mode == PJDLOG_MODE_SYSLOG);
#endif

	if (pjdlog_mode == mode)
		return;

	saved_errno = errno;

	if (mode == PJDLOG_MODE_SYSLOG)
		openlog(NULL, LOG_PID | LOG_NDELAY, LOG_DAEMON);
	else if (mode == PJDLOG_MODE_STD)
		closelog();

	if (mode != PJDLOG_MODE_SOCK)
		pjdlog_sock = -1;

	pjdlog_mode = mode;

	errno = saved_errno;
}


/*
 * Return current mode.
 */
int
pjdlog_mode_get(void)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	return (pjdlog_mode);
}

#ifdef notyet
/*
 * Sets socket number to use for PJDLOG_MODE_SOCK mode.
 */
void
pjdlog_sock_set(int sock)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
	assert(pjdlog_mode == PJDLOG_MODE_SOCK);
	assert(sock >= 0);

	pjdlog_sock = sock;
}
#endif

#ifdef notyet
/*
 * Returns socket number used for PJDLOG_MODE_SOCK mode.
 */
int
pjdlog_sock_get(void)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
	assert(pjdlog_mode == PJDLOG_MODE_SOCK);
	assert(pjdlog_sock >= 0);

	return (pjdlog_sock);
}
#endif

/*
 * Set debug level. All the logs above the level specified here will be
 * ignored.
 */
void
pjdlog_debug_set(int level)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
	assert(level >= 0);
	assert(level <= 127);

	pjdlog_debug_level = level;
}

/*
 * Return current debug level.
 */
int
pjdlog_debug_get(void)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	return (pjdlog_debug_level);
}

/*
 * Set prefix that will be used before each log.
 */
void
pjdlog_prefix_set(const char *fmt, ...)
{
	va_list ap;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	va_start(ap, fmt);
	pjdlogv_prefix_set(fmt, ap);
	va_end(ap);
}

/*
 * Set prefix that will be used before each log.
 */
void
pjdlogv_prefix_set(const char *fmt, va_list ap)
{
	int saved_errno;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
	assert(fmt != NULL);

	saved_errno = errno;

	vsnprintf(pjdlog_prefix[pjdlog_prefix_current],
	    sizeof(pjdlog_prefix[pjdlog_prefix_current]), fmt, ap);

	errno = saved_errno;
}

/*
 * Get current prefix.
 */
const char *
pjdlog_prefix_get(void)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	return (pjdlog_prefix[pjdlog_prefix_current]);
}

/*
 * Set new prefix and put the current one on the stack.
 */
void
pjdlog_prefix_push(const char *fmt, ...)
{
	va_list ap;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	va_start(ap, fmt);
	pjdlogv_prefix_push(fmt, ap);
	va_end(ap);
}

/*
 * Set new prefix and put the current one on the stack.
 */
void
pjdlogv_prefix_push(const char *fmt, va_list ap)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
	assert(pjdlog_prefix_current < PJDLOG_PREFIX_STACK - 1);

	pjdlog_prefix_current++;

	pjdlogv_prefix_set(fmt, ap);
}

/*
 * Removes current prefix and recovers previous one from the stack.
 */
void
pjdlog_prefix_pop(void)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
	assert(pjdlog_prefix_current > 0);

	pjdlog_prefix_current--;
}

/*
 * Convert log level into string.
 */
static const char *
pjdlog_level_to_string(int loglevel)
{

	switch (loglevel) {
	case LOG_EMERG:
		return ("EMERG");
	case LOG_ALERT:
		return ("ALERT");
	case LOG_CRIT:
		return ("CRIT");
	case LOG_ERR:
		return ("ERROR");
	case LOG_WARNING:
		return ("WARNING");
	case LOG_NOTICE:
		return ("NOTICE");
	case LOG_INFO:
		return ("INFO");
	case LOG_DEBUG:
		return ("DEBUG");
	}
	assert(!"Invalid log level.");
	abort();	/* XXX: gcc */
}

static int
vsnprlcat(char *str, size_t size, const char *fmt, va_list ap)
{
	size_t len;

	len = strlen(str);
	assert(len < size);
	return (vsnprintf(str + len, size - len, fmt, ap));
}

static int
snprlcat(char *str, size_t size, const char *fmt, ...)
{
	va_list ap;
	int result;

	va_start(ap, fmt);
	result = vsnprlcat(str, size, fmt, ap);
	va_end(ap);
	return (result);
}

static void
pjdlogv_common_single_line(const char *func, const char *file, int line,
    int loglevel, int debuglevel, int error, const char *msg)
{
	static char log[2 * PJDLOG_MAX_MSGSIZE];
	char *logp;
	size_t logs;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
#ifdef notyet
	assert(pjdlog_mode == PJDLOG_MODE_STD ||
	    pjdlog_mode == PJDLOG_MODE_SYSLOG ||
	    pjdlog_mode == PJDLOG_MODE_SOCK);
#else
	assert(pjdlog_mode == PJDLOG_MODE_STD ||
	    pjdlog_mode == PJDLOG_MODE_SYSLOG);
#endif
	assert(pjdlog_mode != PJDLOG_MODE_SOCK || pjdlog_sock >= 0);
	assert(loglevel == LOG_EMERG || loglevel == LOG_ALERT ||
	    loglevel == LOG_CRIT || loglevel == LOG_ERR ||
	    loglevel == LOG_WARNING || loglevel == LOG_NOTICE ||
	    loglevel == LOG_INFO || loglevel == LOG_DEBUG);
	assert(loglevel != LOG_DEBUG || debuglevel > 0);
	assert(loglevel != LOG_DEBUG || debuglevel <= pjdlog_debug_level);
	assert(debuglevel <= 127);
	assert(error >= -1);
	assert((file != NULL && line > 0) ||
	    (func == NULL && file == NULL && line == 0));

	switch (pjdlog_mode) {
	case PJDLOG_MODE_STD:
	case PJDLOG_MODE_SYSLOG:
		logp = log;
		logs = sizeof(log);
		break;
	case PJDLOG_MODE_SOCK:
		logp = log + 4;
		logs = sizeof(log) - 4;
		break;
	default:
		assert(!"Invalid mode.");
	}

	*logp = '\0';

	if (pjdlog_mode != PJDLOG_MODE_SOCK) {
		if (loglevel == LOG_DEBUG) {
			/* Attach debuglevel if this is debug log. */
			snprlcat(logp, logs, "[%s%d] ",
			    pjdlog_level_to_string(loglevel), debuglevel);
		} else {
			snprlcat(logp, logs, "[%s] ",
			    pjdlog_level_to_string(loglevel));
		}
		if (pjdlog_mode != PJDLOG_MODE_SYSLOG &&
		    pjdlog_debug_level >= 1) {
			snprlcat(logp, logs, "(pid=%d) ", getpid());
		}
	}
	/* Attach file, func, line if debuglevel is 2 or more. */
	if (pjdlog_debug_level >= 2 && file != NULL) {
		if (func == NULL)
			snprlcat(logp, logs, "(%s:%d) ", file, line);
		else
			snprlcat(logp, logs, "(%s:%d:%s) ", file, line, func);
	}

	if (pjdlog_mode != PJDLOG_MODE_SOCK) {
		snprlcat(logp, logs, "%s",
		    pjdlog_prefix[pjdlog_prefix_current]);
	}

	strlcat(logp, msg, logs);

	/* Attach error description. */
	if (error != -1)
		snprlcat(logp, logs, ": %s.", strerror(error));

	switch (pjdlog_mode) {
	case PJDLOG_MODE_STD:
		fprintf(stderr, "%s\n", logp);
		fflush(stderr);
		break;
	case PJDLOG_MODE_SYSLOG:
		syslog(loglevel, "%s", logp);
		break;
#ifdef notyet
	case PJDLOG_MODE_SOCK:
	    {
		char ack[2];
		uint16_t dlen;

		log[2] = loglevel;
		log[3] = debuglevel;
		dlen = strlen(logp) + 3;	/* +3 = loglevel, debuglevel and terminating \0 */
		bcopy(&dlen, log, sizeof(dlen));
		if (robust_send(pjdlog_sock, log, (size_t)dlen + 2) == -1)	/* +2 for size */
			assert(!"Unable to send log.");
		if (robust_recv(pjdlog_sock, ack, sizeof(ack)) == -1)
			assert(!"Unable to send log.");
		break;
	    }
#endif
	default:
		assert(!"Invalid mode.");
	}
}

/*
 * Common log routine, which can handle regular log level as well as debug
 * level. We decide here where to send the logs (stdout/stderr or syslog).
 */
void
_pjdlogv_common(const char *func, const char *file, int line, int loglevel,
    int debuglevel, int error, const char *fmt, va_list ap)
{
	char log[PJDLOG_MAX_MSGSIZE];
	char *logp, *curline;
	const char *prvline;
	int saved_errno;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);
	assert(pjdlog_mode == PJDLOG_MODE_STD ||
	    pjdlog_mode == PJDLOG_MODE_SYSLOG ||
	    pjdlog_mode == PJDLOG_MODE_SOCK);
	assert(pjdlog_mode != PJDLOG_MODE_SOCK || pjdlog_sock >= 0);
	assert(loglevel == LOG_EMERG || loglevel == LOG_ALERT ||
	    loglevel == LOG_CRIT || loglevel == LOG_ERR ||
	    loglevel == LOG_WARNING || loglevel == LOG_NOTICE ||
	    loglevel == LOG_INFO || loglevel == LOG_DEBUG);
	assert(loglevel != LOG_DEBUG || debuglevel > 0);
	assert(debuglevel <= 127);
	assert(error >= -1);

	/* Ignore debug above configured level. */
	if (loglevel == LOG_DEBUG && debuglevel > pjdlog_debug_level)
		return;

	saved_errno = errno;

	vsnprintf(log, sizeof(log), fmt, ap);
	logp = log;
	prvline = NULL;

	while ((curline = strsep(&logp, "\n")) != NULL) {
		if (*curline == '\0')
			continue;
		if (prvline != NULL) {
			pjdlogv_common_single_line(func, file, line, loglevel,
			    debuglevel, -1, prvline);
		}
		prvline = curline;
	}
	if (prvline == NULL)
		prvline = "";
	pjdlogv_common_single_line(func, file, line, loglevel, debuglevel,
	    error, prvline);

	errno = saved_errno;
}

/*
 * Common log routine.
 */
void
_pjdlog_common(const char *func, const char *file, int line, int loglevel,
    int debuglevel, int error, const char *fmt, ...)
{
	va_list ap;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	va_start(ap, fmt);
	_pjdlogv_common(func, file, line, loglevel, debuglevel, error, fmt, ap);
	va_end(ap);
}

/*
 * Log error, errno and exit.
 */
void
_pjdlogv_exit(const char *func, const char *file, int line, int exitcode,
    int error, const char *fmt, va_list ap)
{

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	_pjdlogv_common(func, file, line, exitcode == 0 ? LOG_INFO : LOG_ERR, 0,
	    error, fmt, ap);
	exit(exitcode);
	/* NOTREACHED */
}

/*
 * Log error, errno and exit.
 */
void
_pjdlog_exit(const char *func, const char *file, int line, int exitcode,
    int error, const char *fmt, ...)
{
	va_list ap;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	va_start(ap, fmt);
	_pjdlogv_exit(func, file, line, exitcode, error, fmt, ap);
	/* NOTREACHED */
	va_end(ap);
}

/*
 * Log failure message and exit.
 */
void
_pjdlog_abort(const char *func, const char *file, int line,
    int error, const char *failedexpr, const char *fmt, ...)
{
	va_list ap;

	assert(pjdlog_initialized == PJDLOG_INITIALIZED);

	/*
	 * Set pjdlog_debug_level to 2, so that file, line and func are
	 * included in log. This is fine as we will exit anyway.
	 */
	if (pjdlog_debug_level < 2)
		pjdlog_debug_level = 2;

	/*
	 * When there is no message we pass __func__ as 'fmt'.
	 * It would be cleaner to pass NULL or "", but gcc generates a warning
	 * for both of those.
	 */
	if (fmt != func) {
		va_start(ap, fmt);
		_pjdlogv_common(func, file, line, LOG_CRIT, 0, -1, fmt, ap);
		va_end(ap);
	}
	if (failedexpr == NULL) {
		_pjdlog_common(func, file, line, LOG_CRIT, 0, -1, "Aborted.");
	} else {
		_pjdlog_common(func, file, line, LOG_CRIT, 0, -1,
		    "Assertion failed: (%s).", failedexpr);
	}
	if (error != -1)
		_pjdlog_common(func, file, line, LOG_CRIT, 0, error, "Errno");
	abort();
}

#ifdef notyet
/*
 * Receive log from the given socket.
 */
int
pjdlog_receive(int sock)
{
	char log[PJDLOG_MAX_MSGSIZE];
	int loglevel, debuglevel;
	uint16_t dlen;

	if (robust_recv(sock, &dlen, sizeof(dlen)) == -1)
		return (-1);

	PJDLOG_ASSERT(dlen > 0);
	PJDLOG_ASSERT(dlen <= PJDLOG_MAX_MSGSIZE - 3);

	if (robust_recv(sock, log, (size_t)dlen) == -1)
		return (-1);

	log[dlen - 1] = '\0';
	loglevel = log[0];
	debuglevel = log[1];
	_pjdlog_common(NULL, NULL, 0, loglevel, debuglevel, -1, "%s", log + 2);

	if (robust_send(sock, "ok", 2) == -1)
		return (-1);

	return (0);
}
#endif
OpenPOWER on IntegriCloud