summaryrefslogtreecommitdiff
path: root/common/compat.c
blob: f0e31eb0653baed4f70b80032cbb0d7e0f91da7f (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
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
/*
 * Copyright (c) 2011 Collabora Ltd.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *     * Redistributions of source code must retain the above
 *       copyright notice, this list of conditions and the
 *       following disclaimer.
 *     * 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.
 *     * The names of contributors to this software may not be
 *       used to endorse or promote products derived from this
 *       software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT OWNER 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.
 *
 * Author: Stef Walter <stefw@collabora.co.uk>
 */

#include "config.h"

/*
 * This is needed to expose pthread_mutexattr_settype and PTHREAD_MUTEX_DEFAULT
 * on older pthreads implementations
 */
#define _XOPEN_SOURCE 700

#if defined(HAVE_ISSETUGID) && defined(__FreeBSD__)
#define __BSD_VISIBLE 1
#endif

#include "compat.h"
#include "debug.h"

#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>

/*-
 * Portions of this file are covered by the following copyright:
 *
 * Copyright (c) 2001 Mike Barcroft <mike@FreeBSD.org>
 * Copyright (c) 1990, 1993
 * Copyright (c) 1987, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * 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.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

#ifndef HAVE_GETPROGNAME

#ifdef OS_UNIX

#include <unistd.h>

#if defined (HAVE_PROGRAM_INVOCATION_SHORT_NAME) && !HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME
extern char *program_invocation_short_name;
#endif

#if defined (HAVE___PROGNAME) && !HAVE_DECL___PROGNAME
extern char *__progname;
#endif

const char *
getprogname (void)
{
	const char *name;

#if defined (HAVE_GETEXECNAME)
	const char *p;
	name = getexecname();
	p = strrchr (name ? name : "", '/');
	if (p != NULL)
		name = p + 1;
#elif defined (HAVE_PROGRAM_INVOCATION_SHORT_NAME)
	name = program_invocation_short_name;
#elif defined (HAVE___PROGNAME)
	name = __progname;
#else
	#error No way to retrieve short program name
#endif

	return name;
}

#else /* OS_WIN32 */

extern char **__argv;
static char prognamebuf[256];

const char *
getprogname (void)
{
	const char *name;
	const char *p, *p2;
	size_t length;

	name = __argv[0];
	if (name == NULL)
		return NULL;

	p = strrchr (name, '\\');
	p2 = strrchr (name, '/');
	if (p2 > p)
		p = p2;
	if (p != NULL)
		name = p + 1;

	length = sizeof (prognamebuf) - 1;
	strncpy (prognamebuf, name, length);
	prognamebuf[length] = 0;
	length = strlen (prognamebuf);
	if (length > 4 && _stricmp (prognamebuf + (length - 4), ".exe") == 0)
		prognamebuf[length - 4] = '\0';

	return prognamebuf;
}

#endif /* OS_WIN32 */

#endif /* HAVE_GETPROGNAME */

#ifdef OS_UNIX
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>

#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
void
p11_recursive_mutex_init (p11_mutex_t *mutex)
{
	pthread_mutexattr_t attr;
	int ret;

	pthread_mutexattr_init (&attr);
	pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
	ret = pthread_mutex_init (mutex, &attr);
	assert (ret == 0);
	pthread_mutexattr_destroy (&attr);
}
#endif

char *
p11_dl_error (void)
{
	const char *msg = dlerror ();
	return msg ? strdup (msg) : NULL;
}

struct _p11_mmap {
	int fd;
	void *data;
	size_t size;
};

p11_mmap *
p11_mmap_open (const char *path,
               struct stat *sb,
               void **data,
               size_t *size)
{
	struct stat stb;
	p11_mmap *map;

	map = calloc (1, sizeof (p11_mmap));
	if (map == NULL)
		return NULL;

	map->fd = open (path, O_RDONLY | O_CLOEXEC);
	if (map->fd == -1) {
		free (map);
		return NULL;
	}

	if (sb == NULL) {
		sb = &stb;
		if (fstat (map->fd, &stb) < 0) {
			close (map->fd);
			free (map);
			return NULL;
		}
	}

	/* Workaround for broken ZFS on Linux */
	if (S_ISDIR (sb->st_mode)) {
		errno = EISDIR;
		close (map->fd);
		free (map);
		return NULL;
	}

	if (sb->st_size == 0) {
		*data = "";
		*size = 0;
		return map;
	}

	map->size = sb->st_size;
	map->data = mmap (NULL, map->size, PROT_READ, MAP_PRIVATE, map->fd, 0);
	if (map->data == MAP_FAILED) {
		close (map->fd);
		free (map);
		return NULL;
	}

	*data = map->data;
	*size = map->size;
	return map;
}

void
p11_mmap_close (p11_mmap *map)
{
	if (map->size)
		munmap (map->data, map->size);
	close (map->fd);
	free (map);
}

#endif /* OS_UNIX */

#ifdef OS_WIN32

char *
p11_dl_error (void)
{
	DWORD code = GetLastError();
	LPVOID msg_buf;

	FormatMessageA (FORMAT_MESSAGE_ALLOCATE_BUFFER |
	                FORMAT_MESSAGE_FROM_SYSTEM |
	                FORMAT_MESSAGE_IGNORE_INSERTS,
	                NULL, code,
	                MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
	                (LPSTR)&msg_buf, 0, NULL);

	return msg_buf;
}

int
p11_thread_create (p11_thread_t *thread,
                   p11_thread_routine routine,
                   void *arg)
{
	assert (thread);

	*thread = CreateThread (NULL, 0,
	                        (LPTHREAD_START_ROUTINE)routine,
	                        arg, 0, NULL);

	if (*thread == NULL)
		return GetLastError ();

	return 0;
}

int
p11_thread_join (p11_thread_t thread)
{
	DWORD res;

	res = WaitForSingleObject (thread, INFINITE);
	if (res == WAIT_FAILED)
		return GetLastError ();

	CloseHandle (thread);
	return 0;
}

struct _p11_mmap {
	HANDLE file;
	HANDLE mapping;
	void *data;
};

p11_mmap *
p11_mmap_open (const char *path,
               struct stat *sb,
               void **data,
               size_t *size)
{
	HANDLE mapping;
	LARGE_INTEGER large;
	DWORD errn;
	p11_mmap *map;

	map = calloc (1, sizeof (p11_mmap));
	if (map == NULL) {
		errno = ENOMEM;
		return NULL;
	}

	map->file  = CreateFile (path, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL);
	if (map->file == INVALID_HANDLE_VALUE) {
		errn = GetLastError ();
		free (map);
		SetLastError (errn);
		if (errn == ERROR_PATH_NOT_FOUND || errn == ERROR_FILE_NOT_FOUND)
			errno = ENOENT;
		else if (errn == ERROR_ACCESS_DENIED)
			errno = EPERM;
		return NULL;
	}

	if (sb == NULL) {
		if (!GetFileSizeEx (map->file, &large)) {
			errn = GetLastError ();
			CloseHandle (map->file);
			free (map);
			SetLastError (errn);
			if (errn == ERROR_ACCESS_DENIED)
				errno = EPERM;
			return NULL;
		}
	} else {
		large.QuadPart = sb->st_size;
	}

	mapping = CreateFileMapping (map->file, NULL, PAGE_READONLY, 0, 0, NULL);
	if (!mapping) {
		errn = GetLastError ();
		CloseHandle (map->file);
		free (map);
		SetLastError (errn);
		if (errn == ERROR_ACCESS_DENIED)
			errno = EPERM;
		return NULL;
	}

	map->data = MapViewOfFile (mapping, FILE_MAP_READ, 0, 0, large.QuadPart);
	CloseHandle (mapping);

	if (map->data == NULL) {
		errn = GetLastError ();
		CloseHandle (map->file);
		free (map);
		SetLastError (errn);
		if (errn == ERROR_ACCESS_DENIED)
			errno = EPERM;
		return NULL;
	}

	*data = map->data;
	*size = large.QuadPart;
	return map;
}

void
p11_mmap_close (p11_mmap *map)
{
	UnmapViewOfFile (map->data);
	CloseHandle (map->file);
	free (map);
}

#endif /* OS_WIN32 */

#ifndef HAVE_STRNSTR
#include <string.h>

/*
 * Find the first occurrence of find in s, where the search is limited to the
 * first slen characters of s.
 */
char *
strnstr (const char *s,
         const char *find,
         size_t slen)
{
	char c, sc;
	size_t len;

	if ((c = *find++) != '\0') {
		len = strlen (find);
		do {
			do {
				if (slen-- < 1 || (sc = *s++) == '\0')
					return (NULL);
			} while (sc != c);
			if (len > slen)
				return (NULL);
		} while (strncmp(s, find, len) != 0);
		s--;
	}
	return ((char *)s);
}

#endif /* HAVE_STRNSTR */

#ifndef HAVE_MEMDUP

void *
memdup (const void *data,
        size_t length)
{
	void *dup;

	if (!data)
		return NULL;

	dup = malloc (length);
	if (dup != NULL)
		memcpy (dup, data, length);

	return dup;
}

#endif /* HAVE_MEMDUP */

/*
 * WORKAROUND: So in lots of released builds of firefox a completely broken strndup()
 * is present. It does not NULL terminate its string output. It is unconditionally
 * defined, and overrides the libc strndup() function on platforms where it
 * exists as a function. For this reason we (for now) unconditionally define
 * strndup().
 */

#if 1 /* #ifndef HAVE_STRNDUP */

/*
 * HAVE_STRNDUP may be undefined if strndup() isn't working. So it may be
 * present, and yet strndup may still be a defined header macro.
 */
#ifdef strndup
#undef strndup
#endif

char *
strndup (const char *data,
         size_t length);

char *
strndup (const char *data,
         size_t length)
{
	char *ret;

	ret = malloc (length + 1);
	if (ret != NULL) {
		strncpy (ret, data, length);
		ret[length] = 0;
	}

	return ret;
}

#endif /* HAVE_STRNDUP */

#ifndef HAVE_REALLOCARRAY

void *
reallocarray (void *ptr,
	      size_t nmemb,
	      size_t size)
{
	assert (nmemb > 0 && size > 0);
	if (SIZE_MAX / nmemb < size) {
		errno = ENOMEM;
		return NULL;
	}
	return realloc (ptr, nmemb * size);
}

#endif /* HAVE_MEMDUP */

#ifndef HAVE_STRCONCAT

#include <stdarg.h>

char *
strconcat (const char *first,
           ...)
{
	size_t length = 0;
	const char *arg;
	char *result, *at;
	va_list va;

	va_start (va, first);

	for (arg = first; arg; arg = va_arg (va, const char*)) {
		size_t old_length = length;
		length += strlen (arg);
		return_val_if_fail (length >= old_length, NULL);
	}

	va_end (va);

	at = result = malloc (length + 1);
	if (result == NULL)
	       return NULL;

	va_start (va, first);

	for (arg = first; arg; arg = va_arg (va, const char*)) {
	       length = strlen (arg);
	       memcpy (at, arg, length);
	       at += length;
	}

	va_end (va);

	*at = 0;
	return result;
}

#endif /* HAVE_STRCONCAT */

#ifndef HAVE_VASPRINTF
#include <stdio.h>

int vasprintf(char **strp, const char *fmt, va_list ap);

int
vasprintf (char **strp,
           const char *fmt,
           va_list ap)
{
	char *buf = NULL;
	char *nbuf;
	int guess = 128;
	int length = 0;
	int ret;

	if (fmt == NULL) {
		errno = EINVAL;
		return -1;
	}

	for (;;) {
		nbuf = realloc (buf, guess);
		if (!nbuf) {
			free (buf);
			return -1;
		}

		buf = nbuf;
		length = guess;

		ret = vsnprintf (buf, length, fmt, ap);

		if (ret < 0)
			guess *= 2;

		else if (ret >= length)
			guess = ret + 1;

		else
			break;
	}

	*strp = buf;
	return ret;
}

#endif /* HAVE_VASPRINTF */

#ifndef HAVE_ASPRINTF

int asprintf(char **strp, const char *fmt, ...);

int
asprintf (char **strp,
          const char *fmt,
          ...)
{
	va_list va;
	int ret;

	va_start (va, fmt);
	ret = vasprintf (strp, fmt, va);
	va_end (va);

	return ret;
}

#endif /* HAVE_ASPRINTF */

#ifndef HAVE_GMTIME_R

struct tm *
gmtime_r (const time_t *timep,
          struct tm *result)
{
#ifdef OS_WIN32
	/*
	 * On win32 gmtime() returns thread local storage, so we can
	 * just copy it out into the buffer without worrying about races.
	 */
	struct tm *tg;
	tg = gmtime (timep);
	if (!tg)
		return NULL;
	memcpy (result, tg, sizeof (struct tm));
	return result;
#else
	#error Need either gmtime_r() function on Unix
#endif
}

#endif /* HAVE_GMTIME_R */

#if !defined(HAVE_MKDTEMP) || !defined(HAVE_MKSTEMP)
#include <sys/stat.h>
#include <fcntl.h>

static int
_gettemp (char *path,
          int *doopen,
          int domkdir,
          int slen)
{
	static const char padchar[] =
		"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
	static const int maxpathlen = 1024;

	char *start, *trv, *suffp, *carryp;
	char *pad;
	struct stat sbuf;
	int rval;
	int rnd;
	char carrybuf[maxpathlen];

	if ((doopen != NULL && domkdir) || slen < 0) {
		errno = EINVAL;
		return (0);
	}

	for (trv = path; *trv != '\0'; ++trv)
		;
	if (trv - path >= maxpathlen) {
		errno = ENAMETOOLONG;
		return (0);
	}
	trv -= slen;
	suffp = trv;
	--trv;
	if (trv < path || NULL != strchr (suffp, '/')) {
		errno = EINVAL;
		return (0);
	}

	/* Fill space with random characters */
	while (trv >= path && *trv == 'X') {
		rnd = rand () % (sizeof (padchar) - 1);
		*trv-- = padchar[rnd];
	}
	start = trv + 1;

	/* save first combination of random characters */
	memcpy (carrybuf, start, suffp - start);

	/*
	 * check the target directory.
	 */
	if (doopen != NULL || domkdir) {
		for (; trv > path; --trv) {
			if (*trv == '/') {
				*trv = '\0';
				rval = stat(path, &sbuf);
				*trv = '/';
				if (rval != 0)
					return (0);
				if (!S_ISDIR(sbuf.st_mode)) {
					errno = ENOTDIR;
					return (0);
				}
				break;
			}
		}
	}

	for (;;) {
		if (doopen) {
			if ((*doopen = open (path, O_BINARY | O_CREAT | O_EXCL | O_RDWR | O_CLOEXEC, 0600)) >= 0)
				return (1);
			if (errno != EEXIST)
				return (0);
		} else if (domkdir) {
#ifdef OS_UNIX
			if (mkdir (path, 0700) == 0)
#else
			if (mkdir (path) == 0)
#endif
				return (1);
			if (errno != EEXIST)
				return (0);
#ifdef OS_UNIX
		} else if (lstat (path, &sbuf))
#else
		} else if (stat (path, &sbuf))
#endif
			return (errno == ENOENT);

		/* If we have a collision, cycle through the space of filenames */
		for (trv = start, carryp = carrybuf;;) {
			/* have we tried all possible permutations? */
			if (trv == suffp)
				return (0); /* yes - exit with EEXIST */
			pad = strchr(padchar, *trv);
			if (pad == NULL) {
				/* this should never happen */
				errno = EIO;
				return (0);
			}
			/* increment character */
			*trv = (*++pad == '\0') ? padchar[0] : *pad;
			/* carry to next position? */
			if (*trv == *carryp) {
				/* increment position and loop */
				++trv;
				++carryp;
			} else {
				/* try with new name */
				break;
			}
		}
	}

	/*NOTREACHED*/
}

#endif /* !HAVE_MKDTEMP || !HAVE_MKSTEMP */

#ifndef HAVE_MKSTEMP

int
mkstemp (char *template)
{
	int fd;

	return (_gettemp (template, &fd, 0, 0) ? fd : -1);
}

#endif /* HAVE_MKSTEMP */

#ifndef HAVE_MKDTEMP

char *
mkdtemp (char *template)
{
	return (_gettemp (template, (int *)NULL, 1, 0) ? template : (char *)NULL);
}

#endif /* HAVE_MKDTEMP */

#ifndef HAVE_GETAUXVAL

unsigned long
getauxval (unsigned long type)
{
	static unsigned long secure = 0UL;
	static bool check_secure_initialized = false;

	/*
	 * This is the only one our stand-in impl supports and is
	 * also the only type we define in compat.h header
	 */
	assert (type == AT_SECURE);

	if (!check_secure_initialized) {
#if defined(HAVE___LIBC_ENABLE_SECURE)
		extern int __libc_enable_secure;
		secure = __libc_enable_secure;

#elif defined(HAVE_ISSETUGID) && defined(HAVE_ISSETUGID_OPENBSD)
		secure = issetugid ();

#elif defined(OS_UNIX)
		uid_t ruid, euid, suid; /* Real, effective and saved user ID's */
		gid_t rgid, egid, sgid; /* Real, effective and saved group ID's */

#ifdef HAVE_GETRESUID
		if (getresuid (&ruid, &euid, &suid) != 0 ||
		    getresgid (&rgid, &egid, &sgid) != 0)
#endif /* HAVE_GETRESUID */
		{
			suid = ruid = getuid ();
			sgid = rgid = getgid ();
			euid = geteuid ();
			egid = getegid ();
		}

		secure = (ruid != euid || ruid != suid ||
		          rgid != egid || rgid != sgid);
#endif /* OS_UNIX */
		check_secure_initialized = true;
	}

	return secure;
}

#endif /* HAVE_GETAUXVAL */

char *
secure_getenv (const char *name)
{
	if (getauxval (AT_SECURE))
		return NULL;
	return getenv (name);
}

#ifndef HAVE_STRERROR_R

int
strerror_r (int errnum,
            char *buf,
            size_t buflen)
{
#ifdef OS_WIN32
#if _WIN32_WINNT < 0x502 /* WinXP or older */
	int n = sys_nerr;
	const char *p;
	if (errnum < 0 || errnum >= n)
		p = sys_errlist[n];
	else
		p = sys_errlist[errnum];
	if (buf == NULL || buflen == 0)
		return EINVAL;
	strncpy(buf, p, buflen);
	buf[buflen-1] = 0;
	return 0;
#else /* Server 2003 or newer */
	return strerror_s (buf, buflen, errnum);
#endif /*_WIN32_WINNT*/

#else
	#error no strerror_r implementation
#endif
}

#endif /* HAVE_STRERROR_R */

void
p11_dl_close (void *dl)
{
#ifdef OS_WIN32
	FreeLibrary (dl);
#else
	(void) dlclose (dl);
#endif
}


#ifdef OS_UNIX

#include <unistd.h>

#ifndef HAVE_FDWALK

#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif

int
fdwalk (int (* cb) (void *data, int fd),
        void *data)
{
	struct dirent *de;
	char *end;
	DIR *dir;
	int open_max;
	long num;
	int res = 0;
	int fd;

#ifdef HAVE_SYS_RESOURCE_H
	struct rlimit rl;
#endif

	dir = opendir ("/proc/self/fd");
	if (dir != NULL) {
		while ((de = readdir (dir)) != NULL) {
			end = NULL;
			num = (int) strtol (de->d_name, &end, 10);

			/* didn't parse or is the opendir() fd */
			if (!end || *end != '\0' ||
			    (int)num == dirfd (dir))
				continue;

			fd = num;

			/* call the callback */
			res = cb (data, fd);
			if (res != 0)
				break;
		}

		closedir (dir);
		return res;
	}

	/* No /proc, brute force */
#ifdef HAVE_SYS_RESOURCE_H
	if (getrlimit (RLIMIT_NOFILE, &rl) == 0 && rl.rlim_max != RLIM_INFINITY)
		open_max = rl.rlim_max;
	else
#endif
		open_max = sysconf (_SC_OPEN_MAX);

	for (fd = 0; fd < open_max; fd++) {
		res = cb (data, fd);
		if (res != 0)
			break;
	}

	return res;
}

#endif /* HAVE_FDWALK */

#endif /* OS_UNIX */

int
p11_ascii_tolower (int c)
{
	if (c >= 'A' && c <= 'Z')
		return 'a' + (c - 'A');
	return c;
}

int
p11_ascii_toupper (int c)
{
	if (c >= 'a' && c <= 'z')
		return 'A' + (c - 'a');
	return c;
}