summaryrefslogtreecommitdiffstats
path: root/usr.bin/stat/stat.c
blob: 120febe18d60e339ff5b24235ed8e4c9fd5cf509 (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
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
/*
 * Copyright (c) 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Andrew Brown.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
#if 0
#ifndef lint
__RCSID("$NetBSD: stat.c,v 1.33 2011/01/15 22:54:10 njoly Exp $"
"$OpenBSD: stat.c,v 1.14 2009/06/24 09:44:25 sobrado Exp $");
#endif
#endif

__FBSDID("$FreeBSD$");

#if HAVE_CONFIG_H
#include "config.h" 
#else  /* HAVE_CONFIG_H */
#define HAVE_STRUCT_STAT_ST_FLAGS 1
#define HAVE_STRUCT_STAT_ST_GEN 1
#define HAVE_STRUCT_STAT_ST_BIRTHTIME 1
#define HAVE_STRUCT_STAT_ST_MTIMENSEC 1
#define HAVE_DEVNAME 1
#endif /* HAVE_CONFIG_H */

#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mount.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <grp.h>
#include <limits.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#if HAVE_STRUCT_STAT_ST_FLAGS
#define DEF_F "%#Xf "
#define RAW_F "%f "
#define SHELL_F " st_flags=%f"
#else /* HAVE_STRUCT_STAT_ST_FLAGS */
#define DEF_F
#define RAW_F
#define SHELL_F
#endif /* HAVE_STRUCT_STAT_ST_FLAGS */

#if HAVE_STRUCT_STAT_ST_BIRTHTIME
#define DEF_B "\"%SB\" "
#define RAW_B "%B "
#define SHELL_B "st_birthtime=%B "
#else /* HAVE_STRUCT_STAT_ST_BIRTHTIME */
#define DEF_B
#define RAW_B
#define SHELL_B
#endif /* HAVE_STRUCT_STAT_ST_BIRTHTIME */

#if HAVE_STRUCT_STAT_ST_ATIM
#define st_atimespec st_atim
#define st_ctimespec st_ctim
#define st_mtimespec st_mtim
#endif /* HAVE_STRUCT_STAT_ST_ATIM */

#define DEF_FORMAT \
	"%d %i %Sp %l %Su %Sg %r %z \"%Sa\" \"%Sm\" \"%Sc\" " DEF_B \
	"%k %b " DEF_F "%N"
#define RAW_FORMAT	"%d %i %#p %l %u %g %r %z %a %m %c " RAW_B \
	"%k %b " RAW_F "%N"
#define LS_FORMAT	"%Sp %l %Su %Sg %Z %Sm %N%SY"
#define LSF_FORMAT	"%Sp %l %Su %Sg %Z %Sm %N%T%SY"
#define SHELL_FORMAT \
	"st_dev=%d st_ino=%i st_mode=%#p st_nlink=%l " \
	"st_uid=%u st_gid=%g st_rdev=%r st_size=%z " \
	"st_atime=%a st_mtime=%m st_ctime=%c " SHELL_B \
	"st_blksize=%k st_blocks=%b" SHELL_F
#define LINUX_FORMAT \
	"  File: \"%N\"%n" \
	"  Size: %-11z  FileType: %HT%n" \
	"  Mode: (%OMp%03OLp/%.10Sp)         Uid: (%5u/%8Su)  Gid: (%5g/%8Sg)%n" \
	"Device: %Hd,%Ld   Inode: %i    Links: %l%n" \
	"Access: %Sa%n" \
	"Modify: %Sm%n" \
	"Change: %Sc"

#define TIME_FORMAT	"%b %e %T %Y"

#define FLAG_POUND	0x01
#define FLAG_SPACE	0x02
#define FLAG_PLUS	0x04
#define FLAG_ZERO	0x08
#define FLAG_MINUS	0x10

/*
 * These format characters must all be unique, except the magic one.
 */
#define FMT_MAGIC	'%'
#define FMT_DOT		'.'

#define SIMPLE_NEWLINE	'n'
#define SIMPLE_TAB	't'
#define SIMPLE_PERCENT	'%'
#define SIMPLE_NUMBER	'@'

#define FMT_POUND	'#'
#define FMT_SPACE	' '
#define FMT_PLUS	'+'
#define FMT_ZERO	'0'
#define FMT_MINUS	'-'

#define FMT_DECIMAL 	'D'
#define FMT_OCTAL 	'O'
#define FMT_UNSIGNED 	'U'
#define FMT_HEX 	'X'
#define FMT_FLOAT 	'F'
#define FMT_STRING 	'S'

#define FMTF_DECIMAL	0x01
#define FMTF_OCTAL	0x02
#define FMTF_UNSIGNED	0x04
#define FMTF_HEX	0x08
#define FMTF_FLOAT	0x10
#define FMTF_STRING	0x20

#define HIGH_PIECE	'H'
#define MIDDLE_PIECE	'M'
#define LOW_PIECE	'L'

#define	SHOW_realpath	'R'
#define SHOW_st_dev	'd'
#define SHOW_st_ino	'i'
#define SHOW_st_mode	'p'
#define SHOW_st_nlink	'l'
#define SHOW_st_uid	'u'
#define SHOW_st_gid	'g'
#define SHOW_st_rdev	'r'
#define SHOW_st_atime	'a'
#define SHOW_st_mtime	'm'
#define SHOW_st_ctime	'c'
#define SHOW_st_btime	'B'
#define SHOW_st_size	'z'
#define SHOW_st_blocks	'b'
#define SHOW_st_blksize	'k'
#define SHOW_st_flags	'f'
#define SHOW_st_gen	'v'
#define SHOW_symlink	'Y'
#define SHOW_filetype	'T'
#define SHOW_filename	'N'
#define SHOW_sizerdev	'Z'

void	usage(const char *);
void	output(const struct stat *, const char *,
	    const char *, int, int);
int	format1(const struct stat *,	/* stat info */
	    const char *,		/* the file name */
	    const char *, int,		/* the format string itself */
	    char *, size_t,		/* a place to put the output */
	    int, int, int, int,		/* the parsed format */
	    int, int);
int	hex2byte(const char [2]);
#if HAVE_STRUCT_STAT_ST_FLAGS
char   *xfflagstostr(unsigned long);
#endif

static const char *timefmt;
static int linkfail;

#define addchar(s, c, nl) \
	do { \
		(void)fputc((c), (s)); \
		(*nl) = ((c) == '\n'); \
	} while (0/*CONSTCOND*/)

int
main(int argc, char *argv[])
{
	struct stat st;
	int ch, rc, errs, am_readlink;
	int lsF, fmtchar, usestat, nfs_handle, fn, nonl, quiet;
	const char *statfmt, *options, *synopsis;
	char dname[sizeof _PATH_DEV + SPECNAMELEN] = _PATH_DEV;
	fhandle_t fhnd;
	const char *file;

	am_readlink = 0;
	lsF = 0;
	fmtchar = '\0';
	usestat = 0;
	nfs_handle = 0;
	nonl = 0;
	quiet = 0;
	linkfail = 0;
	statfmt = NULL;
	timefmt = NULL;

	if (strcmp(getprogname(), "readlink") == 0) {
		am_readlink = 1;
		options = "fn";
		synopsis = "[-fn] [file ...]";
		statfmt = "%Y";
		fmtchar = 'f';
		quiet = 1;
	} else {
		options = "f:FHlLnqrst:x";
		synopsis = "[-FLnq] [-f format | -l | -r | -s | -x] "
		    "[-t timefmt] [file|handle ...]";
	}

	while ((ch = getopt(argc, argv, options)) != -1)
		switch (ch) {
		case 'F':
			lsF = 1;
			break;
                case 'H':
			nfs_handle = 1;
			break;
		case 'L':
			usestat = 1;
			break;
		case 'n':
			nonl = 1;
			break;
		case 'q':
			quiet = 1;
			break;
		case 'f':
			if (am_readlink) {
				statfmt = "%R";
				break;
			}
			statfmt = optarg;
			/* FALLTHROUGH */
		case 'l':
		case 'r':
		case 's':
		case 'x':
			if (fmtchar != 0)
				errx(1, "can't use format '%c' with '%c'",
				    fmtchar, ch);
			fmtchar = ch;
			break;
		case 't':
			timefmt = optarg;
			break;
		default:
			usage(synopsis);
		}

	argc -= optind;
	argv += optind;
	fn = 1;

	if (fmtchar == '\0') {
		if (lsF)
			fmtchar = 'l';
		else {
			fmtchar = 'f';
			statfmt = DEF_FORMAT;
		}
	}

	if (lsF && fmtchar != 'l')
		errx(1, "can't use format '%c' with -F", fmtchar);

	switch (fmtchar) {
	case 'f':
		/* statfmt already set */
		break;
	case 'l':
		statfmt = lsF ? LSF_FORMAT : LS_FORMAT;
		break;
	case 'r':
		statfmt = RAW_FORMAT;
		break;
	case 's':
		statfmt = SHELL_FORMAT;
		break;
	case 'x':
		statfmt = LINUX_FORMAT;
		if (timefmt == NULL)
			timefmt = "%c";
		break;
	default:
		usage(synopsis);
		/*NOTREACHED*/
	}

	if (timefmt == NULL)
		timefmt = TIME_FORMAT;

	errs = 0;
	do {
		if (argc == 0) {
			if (fdevname_r(STDIN_FILENO, dname +
			    sizeof _PATH_DEV - 1, SPECNAMELEN) != NULL)
				file = dname;
			else
				file = "(stdin)";
			rc = fstat(STDIN_FILENO, &st);
		} else {
			int j;

			file = argv[0];
			if (nfs_handle) {
				rc = 0;
				bzero(&fhnd, sizeof(fhnd));
				j = MIN(2 * sizeof(fhnd), strlen(file));
				if ((j & 1) != 0) {
					rc = -1;
				} else {
					while (j) {
						rc = hex2byte(&file[j - 2]);
						if (rc == -1)
							break;
						((char*) &fhnd)[j / 2 - 1] = rc;
						j -= 2;
					}
				}
				if (rc == -1)
					errno = EINVAL;
				else
					rc = fhstat(&fhnd, &st);

			} else if (usestat) {
				/*
				 * Try stat() and if it fails, fall back to
				 * lstat() just in case we're examining a
				 * broken symlink.
				 */
				if ((rc = stat(file, &st)) == -1 &&
				    errno == ENOENT &&
				    (rc = lstat(file, &st)) == -1)
					errno = ENOENT;
			}
			else
				rc = lstat(file, &st);
		}

		if (rc == -1) {
			errs = 1;
			linkfail = 1;
			if (!quiet)
				warn("%s: stat", file);
		}
		else
			output(&st, file, statfmt, fn, nonl);

		argv++;
		argc--;
		fn++;
	} while (argc > 0);

	return (am_readlink ? linkfail : errs);
}

#if HAVE_STRUCT_STAT_ST_FLAGS
/*
 * fflagstostr() wrapper that leaks only once
 */
char *
xfflagstostr(unsigned long fflags)
{
	static char *str = NULL;

	if (str != NULL)
		free(str);

	str = fflagstostr(fflags);
	if (str == NULL)
		err(1, "fflagstostr");
	return (str);
}
#endif /* HAVE_STRUCT_STAT_ST_FLAGS */

void
usage(const char *synopsis)
{

	(void)fprintf(stderr, "usage: %s %s\n", getprogname(), synopsis);
	exit(1);
}

/* 
 * Parses a format string.
 */
void
output(const struct stat *st, const char *file,
    const char *statfmt, int fn, int nonl)
{
	int flags, size, prec, ofmt, hilo, what;
	char buf[PATH_MAX + 4 + 1];
	const char *subfmt;
	int nl, t, i;

	nl = 1;
	while (*statfmt != '\0') {

		/*
		 * Non-format characters go straight out.
		 */
		if (*statfmt != FMT_MAGIC) {
			addchar(stdout, *statfmt, &nl);
			statfmt++;
			continue;
		}

		/*
		 * The current format "substring" starts here,
		 * and then we skip the magic.
		 */
		subfmt = statfmt;
		statfmt++;

		/*
		 * Some simple one-character "formats".
		 */
		switch (*statfmt) {
		case SIMPLE_NEWLINE:
			addchar(stdout, '\n', &nl);
			statfmt++;
			continue;
		case SIMPLE_TAB:
			addchar(stdout, '\t', &nl);
			statfmt++;
			continue;
		case SIMPLE_PERCENT:
			addchar(stdout, '%', &nl);
			statfmt++;
			continue;
		case SIMPLE_NUMBER: {
			char num[12], *p;

			snprintf(num, sizeof(num), "%d", fn);
			for (p = &num[0]; *p; p++)
				addchar(stdout, *p, &nl);
			statfmt++;
			continue;
		}
		}

		/*
		 * This must be an actual format string.  Format strings are
		 * similar to printf(3) formats up to a point, and are of
		 * the form:
		 *
		 *	%	required start of format
		 *	[-# +0]	opt. format characters
		 *	size	opt. field width
		 *	.	opt. decimal separator, followed by
		 *	prec	opt. precision
		 *	fmt	opt. output specifier (string, numeric, etc.)
		 *	sub	opt. sub field specifier (high, middle, low)
		 *	datum	required field specifier (size, mode, etc)
		 *
		 * Only the % and the datum selector are required.  All data
		 * have reasonable default output forms.  The "sub" specifier
		 * only applies to certain data (mode, dev, rdev, filetype).
		 * The symlink output defaults to STRING, yet will only emit
		 * the leading " -> " if STRING is explicitly specified.  The
		 * sizerdev datum will generate rdev output for character or
		 * block devices, and size output for all others.
		 */
		flags = 0;
		do {
			if      (*statfmt == FMT_POUND)
				flags |= FLAG_POUND;
			else if (*statfmt == FMT_SPACE)
				flags |= FLAG_SPACE;
			else if (*statfmt == FMT_PLUS)
				flags |= FLAG_PLUS;
			else if (*statfmt == FMT_ZERO)
				flags |= FLAG_ZERO;
			else if (*statfmt == FMT_MINUS)
				flags |= FLAG_MINUS;
			else
				break;
			statfmt++;
		} while (1/*CONSTCOND*/);

		size = -1;
		if (isdigit((unsigned)*statfmt)) {
			size = 0;
			while (isdigit((unsigned)*statfmt)) {
				size = (size * 10) + (*statfmt - '0');
				statfmt++;
				if (size < 0)
					goto badfmt;
			}
		}

		prec = -1;
		if (*statfmt == FMT_DOT) {
			statfmt++;

			prec = 0;
			while (isdigit((unsigned)*statfmt)) {
				prec = (prec * 10) + (*statfmt - '0');
				statfmt++;
				if (prec < 0)
					goto badfmt;
			}
		}

#define fmtcase(x, y)		case (y): (x) = (y); statfmt++; break
#define fmtcasef(x, y, z)	case (y): (x) = (z); statfmt++; break
		switch (*statfmt) {
			fmtcasef(ofmt, FMT_DECIMAL,	FMTF_DECIMAL);
			fmtcasef(ofmt, FMT_OCTAL,	FMTF_OCTAL);
			fmtcasef(ofmt, FMT_UNSIGNED,	FMTF_UNSIGNED);
			fmtcasef(ofmt, FMT_HEX,		FMTF_HEX);
			fmtcasef(ofmt, FMT_FLOAT,	FMTF_FLOAT);
			fmtcasef(ofmt, FMT_STRING,	FMTF_STRING);
		default:
			ofmt = 0;
			break;
		}

		switch (*statfmt) {
			fmtcase(hilo, HIGH_PIECE);
			fmtcase(hilo, MIDDLE_PIECE);
			fmtcase(hilo, LOW_PIECE);
		default:
			hilo = 0;
			break;
		}

		switch (*statfmt) {
			fmtcase(what, SHOW_realpath);
			fmtcase(what, SHOW_st_dev);
			fmtcase(what, SHOW_st_ino);
			fmtcase(what, SHOW_st_mode);
			fmtcase(what, SHOW_st_nlink);
			fmtcase(what, SHOW_st_uid);
			fmtcase(what, SHOW_st_gid);
			fmtcase(what, SHOW_st_rdev);
			fmtcase(what, SHOW_st_atime);
			fmtcase(what, SHOW_st_mtime);
			fmtcase(what, SHOW_st_ctime);
			fmtcase(what, SHOW_st_btime);
			fmtcase(what, SHOW_st_size);
			fmtcase(what, SHOW_st_blocks);
			fmtcase(what, SHOW_st_blksize);
			fmtcase(what, SHOW_st_flags);
			fmtcase(what, SHOW_st_gen);
			fmtcase(what, SHOW_symlink);
			fmtcase(what, SHOW_filetype);
			fmtcase(what, SHOW_filename);
			fmtcase(what, SHOW_sizerdev);
		default:
			goto badfmt;
		}
#undef fmtcasef
#undef fmtcase

		t = format1(st,
		     file,
		     subfmt, statfmt - subfmt,
		     buf, sizeof(buf),
		     flags, size, prec, ofmt, hilo, what);

		for (i = 0; i < t && i < (int)(sizeof(buf) - 1); i++)
			addchar(stdout, buf[i], &nl);

		continue;

	badfmt:
		errx(1, "%.*s: bad format",
		    (int)(statfmt - subfmt + 1), subfmt);
	}

	if (!nl && !nonl)
		(void)fputc('\n', stdout);
	(void)fflush(stdout);
}

/*
 * Arranges output according to a single parsed format substring.
 */
int
format1(const struct stat *st,
    const char *file,
    const char *fmt, int flen,
    char *buf, size_t blen,
    int flags, int size, int prec, int ofmt,
    int hilo, int what)
{
	u_int64_t data;
	char *stmp, lfmt[24], tmp[20];
	const char *sdata;
	char smode[12], sid[12], path[PATH_MAX + 4];
	struct passwd *pw;
	struct group *gr;
	const struct timespec *tsp;
	struct timespec ts;
	struct tm *tm;
	int l, small, formats;

	tsp = NULL;
	formats = 0;
	small = 0;

	/*
	 * First, pick out the data and tweak it based on hilo or
	 * specified output format (symlink output only).
	 */
	switch (what) {
	case SHOW_st_dev:
	case SHOW_st_rdev:
		small = (sizeof(st->st_dev) == 4);
		data = (what == SHOW_st_dev) ? st->st_dev : st->st_rdev;
#if HAVE_DEVNAME
		sdata = (what == SHOW_st_dev) ?
		    devname(st->st_dev, S_IFBLK) :
		    devname(st->st_rdev, 
		    S_ISCHR(st->st_mode) ? S_IFCHR :
		    S_ISBLK(st->st_mode) ? S_IFBLK :
		    0U);
		if (sdata == NULL)
			sdata = "???";
#endif /* HAVE_DEVNAME */
		if (hilo == HIGH_PIECE) {
			data = major(data);
			hilo = 0;
		}
		else if (hilo == LOW_PIECE) {
			data = minor((unsigned)data);
			hilo = 0;
		}
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
#if HAVE_DEVNAME
		    FMTF_STRING;
#else /* HAVE_DEVNAME */
		    0;
#endif /* HAVE_DEVNAME */
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
	case SHOW_st_ino:
		small = (sizeof(st->st_ino) == 4);
		data = st->st_ino;
		sdata = NULL;
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
	case SHOW_st_mode:
		small = (sizeof(st->st_mode) == 4);
		data = st->st_mode;
		strmode(st->st_mode, smode);
		stmp = smode;
		l = strlen(stmp);
		if (stmp[l - 1] == ' ')
			stmp[--l] = '\0';
		if (hilo == HIGH_PIECE) {
			data >>= 12;
			stmp += 1;
			stmp[3] = '\0';
			hilo = 0;
		}
		else if (hilo == MIDDLE_PIECE) {
			data = (data >> 9) & 07;
			stmp += 4;
			stmp[3] = '\0';
			hilo = 0;
		}
		else if (hilo == LOW_PIECE) {
			data &= 0777;
			stmp += 7;
			stmp[3] = '\0';
			hilo = 0;
		}
		sdata = stmp;
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
		    FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_OCTAL;
		break;
	case SHOW_st_nlink:
		small = (sizeof(st->st_dev) == 4);
		data = st->st_nlink;
		sdata = NULL;
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
	case SHOW_st_uid:
		small = (sizeof(st->st_uid) == 4);
		data = st->st_uid;
		if ((pw = getpwuid(st->st_uid)) != NULL)
			sdata = pw->pw_name;
		else {
			snprintf(sid, sizeof(sid), "(%ld)", (long)st->st_uid);
			sdata = sid;
		}
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
		    FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
	case SHOW_st_gid:
		small = (sizeof(st->st_gid) == 4);
		data = st->st_gid;
		if ((gr = getgrgid(st->st_gid)) != NULL)
			sdata = gr->gr_name;
		else {
			snprintf(sid, sizeof(sid), "(%ld)", (long)st->st_gid);
			sdata = sid;
		}
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
		    FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
	case SHOW_st_atime:
		tsp = &st->st_atimespec;
		/* FALLTHROUGH */
	case SHOW_st_mtime:
		if (tsp == NULL)
			tsp = &st->st_mtimespec;
		/* FALLTHROUGH */
	case SHOW_st_ctime:
		if (tsp == NULL)
			tsp = &st->st_ctimespec;
		/* FALLTHROUGH */
#if HAVE_STRUCT_STAT_ST_BIRTHTIME
	case SHOW_st_btime:
		if (tsp == NULL)
			tsp = &st->st_birthtimespec;
#endif /* HAVE_STRUCT_STAT_ST_BIRTHTIME */
		ts = *tsp;		/* copy so we can muck with it */
		small = (sizeof(ts.tv_sec) == 4);
		data = ts.tv_sec;
		tm = localtime(&ts.tv_sec);
		if (tm == NULL) {
			ts.tv_sec = 0;
			tm = localtime(&ts.tv_sec);
		}
		(void)strftime(path, sizeof(path), timefmt, tm);
		sdata = path;
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
		    FMTF_FLOAT | FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_DECIMAL;
		break;
	case SHOW_st_size:
		small = (sizeof(st->st_size) == 4);
		data = st->st_size;
		sdata = NULL;
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
	case SHOW_st_blocks:
		small = (sizeof(st->st_blocks) == 4);
		data = st->st_blocks;
		sdata = NULL;
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
	case SHOW_st_blksize:
		small = (sizeof(st->st_blksize) == 4);
		data = st->st_blksize;
		sdata = NULL;
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
#if HAVE_STRUCT_STAT_ST_FLAGS
	case SHOW_st_flags:
		small = (sizeof(st->st_flags) == 4);
		data = st->st_flags;
		sdata = xfflagstostr(st->st_flags);
		if (*sdata == '\0')
			sdata = "-";
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
		    FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
#endif /* HAVE_STRUCT_STAT_ST_FLAGS */
#if HAVE_STRUCT_STAT_ST_GEN
	case SHOW_st_gen:
		small = (sizeof(st->st_gen) == 4);
		data = st->st_gen;
		sdata = NULL;
		formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
		if (ofmt == 0)
			ofmt = FMTF_UNSIGNED;
		break;
#endif /* HAVE_STRUCT_STAT_ST_GEN */
	case SHOW_realpath:
		small = 0;
		data = 0;
		if (file == NULL) {
			(void)strlcpy(path, "(stdin)", sizeof(path));
			sdata = path;
		} else {
			snprintf(path, sizeof(path), " -> ");
			if (realpath(file, path + 4) == NULL) {
				linkfail = 1;
				l = 0;
				path[0] = '\0';
			}
			sdata = path + (ofmt == FMTF_STRING ? 0 : 4);
		}

		formats = FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_STRING;
		break;
	case SHOW_symlink:
		small = 0;
		data = 0;
		if (S_ISLNK(st->st_mode)) {
			snprintf(path, sizeof(path), " -> ");
			l = readlink(file, path + 4, sizeof(path) - 4 - 1);
			if (l == -1) {
				linkfail = 1;
				l = 0;
				path[0] = '\0';
			}
			path[l + 4] = '\0';
			sdata = path + (ofmt == FMTF_STRING ? 0 : 4);
		}
		else {
			linkfail = 1;
			sdata = "";
		}
		formats = FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_STRING;
		break;
	case SHOW_filetype:
		small = 0;
		data = 0;
		sdata = "";
		if (hilo == 0 || hilo == LOW_PIECE) {
			switch (st->st_mode & S_IFMT) {
			case S_IFIFO:	sdata = "|";	break;
			case S_IFDIR:	sdata = "/";	break;
			case S_IFREG:
				if (st->st_mode &
				    (S_IXUSR | S_IXGRP | S_IXOTH))
					sdata = "*";
				break;
			case S_IFLNK:	sdata = "@";	break;
			case S_IFSOCK:	sdata = "=";	break;
#ifdef S_IFWHT
			case S_IFWHT:	sdata = "%";	break;
#endif /* S_IFWHT */
#ifdef S_IFDOOR
			case S_IFDOOR:	sdata = ">";	break;
#endif /* S_IFDOOR */
			}
			hilo = 0;
		}
		else if (hilo == HIGH_PIECE) {
			switch (st->st_mode & S_IFMT) {
			case S_IFIFO:	sdata = "Fifo File";		break;
			case S_IFCHR:	sdata = "Character Device";	break;
			case S_IFDIR:	sdata = "Directory";		break;
			case S_IFBLK:	sdata = "Block Device";		break;
			case S_IFREG:	sdata = "Regular File";		break;
			case S_IFLNK:	sdata = "Symbolic Link";	break;
			case S_IFSOCK:	sdata = "Socket";		break;
#ifdef S_IFWHT
			case S_IFWHT:	sdata = "Whiteout File";	break;
#endif /* S_IFWHT */
#ifdef S_IFDOOR
			case S_IFDOOR:	sdata = "Door";			break;
#endif /* S_IFDOOR */
			default:	sdata = "???";			break;
			}
			hilo = 0;
		}
		formats = FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_STRING;
		break;
	case SHOW_filename:
		small = 0;
		data = 0;
		(void)strlcpy(path, file, sizeof(path));
		sdata = path;
		formats = FMTF_STRING;
		if (ofmt == 0)
			ofmt = FMTF_STRING;
		break;
	case SHOW_sizerdev:
		if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) {
			char majdev[20], mindev[20];
			int l1, l2;

			l1 = format1(st,
			    file,
			    fmt, flen,
			    majdev, sizeof(majdev),
			    flags, size, prec,
			    ofmt, HIGH_PIECE, SHOW_st_rdev);
			l2 = format1(st,
			    file,
			    fmt, flen,
			    mindev, sizeof(mindev),
			    flags, size, prec,
			    ofmt, LOW_PIECE, SHOW_st_rdev);
			return (snprintf(buf, blen, "%.*s,%.*s",
			    l1, majdev, l2, mindev));
		}
		else {
			return (format1(st,
			    file,
			    fmt, flen,
			    buf, blen,
			    flags, size, prec,
			    ofmt, 0, SHOW_st_size));
		}
		/*NOTREACHED*/
	default:
		errx(1, "%.*s: bad format", (int)flen, fmt);
	}

	/*
	 * If a subdatum was specified but not supported, or an output
	 * format was selected that is not supported, that's an error.
	 */
	if (hilo != 0 || (ofmt & formats) == 0)
		errx(1, "%.*s: bad format", (int)flen, fmt);

	/*
	 * Assemble the format string for passing to printf(3).
	 */
	lfmt[0] = '\0';
	(void)strcat(lfmt, "%");
	if (flags & FLAG_POUND)
		(void)strcat(lfmt, "#");
	if (flags & FLAG_SPACE)
		(void)strcat(lfmt, " ");
	if (flags & FLAG_PLUS)
		(void)strcat(lfmt, "+");
	if (flags & FLAG_MINUS)
		(void)strcat(lfmt, "-");
	if (flags & FLAG_ZERO)
		(void)strcat(lfmt, "0");

	/*
	 * Only the timespecs support the FLOAT output format, and that
	 * requires work that differs from the other formats.
	 */ 
	if (ofmt == FMTF_FLOAT) {
		/*
		 * Nothing after the decimal point, so just print seconds.
		 */
		if (prec == 0) {
			if (size != -1) {
				(void)snprintf(tmp, sizeof(tmp), "%d", size);
				(void)strcat(lfmt, tmp);
			}
			(void)strcat(lfmt, "lld");
			return (snprintf(buf, blen, lfmt,
			    (long long)ts.tv_sec));
		}

		/*
		 * Unspecified precision gets all the precision we have:
		 * 9 digits.
		 */
		if (prec == -1)
			prec = 9;

		/*
		 * Adjust the size for the decimal point and the digits
		 * that will follow.
		 */
		size -= prec + 1;

		/*
		 * Any leftover size that's legitimate will be used.
		 */
		if (size > 0) {
			(void)snprintf(tmp, sizeof(tmp), "%d", size);
			(void)strcat(lfmt, tmp);
		}
		/* Seconds: time_t cast to long long. */
		(void)strcat(lfmt, "lld");

		/*
		 * The stuff after the decimal point always needs zero
		 * filling.
		 */
		(void)strcat(lfmt, ".%0");

		/*
		 * We can "print" at most nine digits of precision.  The
		 * rest we will pad on at the end.
		 *
		 * Nanoseconds: long.
		 */
		(void)snprintf(tmp, sizeof(tmp), "%dld", prec > 9 ? 9 : prec);
		(void)strcat(lfmt, tmp);

		/*
		 * For precision of less that nine digits, trim off the
		 * less significant figures.
		 */
		for (; prec < 9; prec++)
			ts.tv_nsec /= 10;

		/*
		 * Use the format, and then tack on any zeroes that
		 * might be required to make up the requested precision.
		 */
		l = snprintf(buf, blen, lfmt, (long long)ts.tv_sec, ts.tv_nsec);
		for (; prec > 9 && l < (int)blen; prec--, l++)
			(void)strcat(buf, "0");
		return (l);
	}

	/*
	 * Add on size and precision, if specified, to the format.
	 */
	if (size != -1) {
		(void)snprintf(tmp, sizeof(tmp), "%d", size);
		(void)strcat(lfmt, tmp);
	}
	if (prec != -1) {
		(void)snprintf(tmp, sizeof(tmp), ".%d", prec);
		(void)strcat(lfmt, tmp);
	}

	/*
	 * String output uses the temporary sdata.
	 */
	if (ofmt == FMTF_STRING) {
		if (sdata == NULL)
			errx(1, "%.*s: bad format", (int)flen, fmt);
		(void)strcat(lfmt, "s");
		return (snprintf(buf, blen, lfmt, sdata));
	}

	/*
	 * Ensure that sign extension does not cause bad looking output
	 * for some forms.
	 */
	if (small && ofmt != FMTF_DECIMAL)
		data = (u_int32_t)data;

	/*
	 * The four "numeric" output forms.
	 */
	(void)strcat(lfmt, "ll");
	switch (ofmt) {
	case FMTF_DECIMAL:	(void)strcat(lfmt, "d");	break;
	case FMTF_OCTAL:		(void)strcat(lfmt, "o");	break;
	case FMTF_UNSIGNED:	(void)strcat(lfmt, "u");	break;
	case FMTF_HEX:		(void)strcat(lfmt, "x");	break;
	}

	return (snprintf(buf, blen, lfmt, data));
}


#define hex2nibble(c) (c <= '9' ? c - '0' : toupper(c) - 'A' + 10)
int
hex2byte(const char c[2]) {
	if (!(ishexnumber(c[0]) && ishexnumber(c[1])))
		return -1;
	return (hex2nibble(c[0]) << 4) + hex2nibble(c[1]);
}
OpenPOWER on IntegriCloud