summaryrefslogtreecommitdiffstats
path: root/bin/chio/chio.c
blob: b0f160f17e150b6ec674dde42a761a76f9214d98 (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
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
/*	$NetBSD: chio.c,v 1.6 1998/01/04 23:53:58 thorpej Exp $ */
/*
 * Copyright (c) 1996 Jason R. Thorpe <thorpej@and.com>
 * All rights reserved.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgements:
 *	This product includes software developed by Jason R. Thorpe
 *	for And Communications, http://www.and.com/
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */
/*
 * Additional Copyright (c) 1997, by Matthew Jacob, for NASA/Ames Research Ctr.
 * Addidional Copyright (c) 2000, by C. Stephen Gunn, Waterspout Communications
 */

#ifndef lint
static const char copyright[] =
	"@(#) Copyright (c) 1996 Jason R. Thorpe.  All rights reserved.";
#endif /* not lint */

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

#include <sys/param.h>
#include <sys/chio.h> 
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "defs.h"
#include "pathnames.h"

static	void usage(void);
static	void cleanup(void);
static	u_int16_t parse_element_type(char *);
static	u_int16_t parse_element_unit(char *);
static	const char * element_type_name(int et);
static	int parse_special(char *);
static	int is_special(char *);
static	const char *bits_to_string(ces_status_flags, const char *);

static	void find_element(char *, uint16_t *, uint16_t *);
static	struct changer_element_status *get_element_status
	   (unsigned int, unsigned int);

static	int do_move(const char *, int, char **);
static	int do_exchange(const char *, int, char **);
static	int do_position(const char *, int, char **);
static	int do_params(const char *, int, char **);
static	int do_getpicker(const char *, int, char **);
static	int do_setpicker(const char *, int, char **);
static	int do_status(const char *, int, char **);
static	int do_ielem(const char *, int, char **);
static	int do_return(const char *, int, char **);
static	int do_voltag(const char *, int, char **);

#ifndef CHET_VT
#define	CHET_VT		10			/* Completely Arbitrary */
#endif

/* Valid changer element types. */
const struct element_type elements[] = {
	{ "drive",		CHET_DT },
	{ "picker",		CHET_MT },
	{ "portal",		CHET_IE },
	{ "slot",		CHET_ST },
	{ "voltag",		CHET_VT },	/* Select tapes by barcode */
	{ NULL,			0 },
};

/* Valid commands. */
const struct changer_command commands[] = {
	{ "exchange",		do_exchange },
	{ "getpicker",		do_getpicker },
	{ "ielem", 		do_ielem },
	{ "move",		do_move },
	{ "params",		do_params },
	{ "position",		do_position },
	{ "setpicker",		do_setpicker },
	{ "status",		do_status },
	{ "return",		do_return },
	{ "voltag",		do_voltag },
	{ NULL,			0 },
};

/* Valid special words. */
const struct special_word specials[] = {
	{ "inv",		SW_INVERT },
	{ "inv1",		SW_INVERT1 },
	{ "inv2",		SW_INVERT2 },
	{ NULL,			0 },
};

static	int changer_fd;
static	const char *changer_name;

int
main(int argc, char **argv)
{
	int ch, i;

	while ((ch = getopt(argc, argv, "f:")) != -1) {
		switch (ch) {
		case 'f':
			changer_name = optarg;
			break;

		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (argc == 0)
		usage();

	/* Get the default changer if not already specified. */
	if (changer_name == NULL)
		if ((changer_name = getenv(CHANGER_ENV_VAR)) == NULL)
			changer_name = _PATH_CH;

	/* Open the changer device. */
	if ((changer_fd = open(changer_name, O_RDWR, 0600)) == -1)
		err(1, "%s: open", changer_name);

	/* Register cleanup function. */
	if (atexit(cleanup))
		err(1, "can't register cleanup function");

	/* Find the specified command. */
	for (i = 0; commands[i].cc_name != NULL; ++i)
		if (strcmp(*argv, commands[i].cc_name) == 0)
			break;
	if (commands[i].cc_name == NULL) {
		/* look for abbreviation */
		for (i = 0; commands[i].cc_name != NULL; ++i)
			if (strncmp(*argv, commands[i].cc_name,
			    strlen(*argv)) == 0)
				break;
	}

	if (commands[i].cc_name == NULL)
		errx(1, "unknown command: %s", *argv);

	exit ((*commands[i].cc_handler)(commands[i].cc_name, argc, argv));
	/* NOTREACHED */
}

static int
do_move(const char *cname, int argc, char **argv)
{
	struct changer_move cmd;
	int val;

	/*
	 * On a move command, we expect the following:
	 *
	 * <from ET> <from EU> <to ET> <to EU> [inv]
	 *
	 * where ET == element type and EU == element unit.
	 */

	++argv; --argc;

	if (argc < 4) {
		warnx("%s: too few arguments", cname);
		goto usage;
	} else if (argc > 5) {
		warnx("%s: too many arguments", cname);
		goto usage;
	}
	(void) memset(&cmd, 0, sizeof(cmd));

	/* <from ET>  */
	cmd.cm_fromtype = parse_element_type(*argv);
	++argv; --argc;

	/* Check for voltag virtual type */
	if (CHET_VT == cmd.cm_fromtype) {
		find_element(*argv, &cmd.cm_fromtype, &cmd.cm_fromunit);
	} else {
		/* <from EU> */
		cmd.cm_fromunit = parse_element_unit(*argv);
	}
	++argv; --argc;

	/* <to ET> */
	cmd.cm_totype = parse_element_type(*argv);
	++argv; --argc;

	/* Check for voltag virtual type, and report error */
	if (CHET_VT == cmd.cm_totype)
		errx(1,"%s: voltag only makes sense as an element source",
		     cname);

	/* <to EU> */
	cmd.cm_tounit = parse_element_unit(*argv);
	++argv; --argc;

	/* Deal with optional command modifier. */
	if (argc) {
		val = parse_special(*argv);
		switch (val) {
		case SW_INVERT:
			cmd.cm_flags |= CM_INVERT;
			break;

		default:
			errx(1, "%s: inappropriate modifier `%s'",
			    cname, *argv);
			/* NOTREACHED */
		}
	}

	/* Send command to changer. */
	if (ioctl(changer_fd, CHIOMOVE, &cmd))
		err(1, "%s: CHIOMOVE", changer_name);

	return (0);

 usage:
	(void) fprintf(stderr, "usage: %s %s "
	    "<from ET> <from EU> <to ET> <to EU> [inv]\n", getprogname(), cname);
	return (1);
}

static int
do_exchange(const char *cname, int argc, char **argv)
{
	struct changer_exchange cmd;
	int val;

	/*
	 * On an exchange command, we expect the following:
	 *
  * <src ET> <src EU> <dst1 ET> <dst1 EU> [<dst2 ET> <dst2 EU>] [inv1] [inv2]
	 *
	 * where ET == element type and EU == element unit.
	 */

	++argv; --argc;

	if (argc < 4) {
		warnx("%s: too few arguments", cname);
		goto usage;
	} else if (argc > 8) {
		warnx("%s: too many arguments", cname);
		goto usage;
	}
	(void) memset(&cmd, 0, sizeof(cmd));

	/* <src ET>  */
	cmd.ce_srctype = parse_element_type(*argv);
	++argv; --argc;

	/* Check for voltag virtual type */
	if (CHET_VT == cmd.ce_srctype) {
		find_element(*argv, &cmd.ce_srctype, &cmd.ce_srcunit);
	} else {
		/* <from EU> */
		cmd.ce_srcunit = parse_element_unit(*argv);
	}
	++argv; --argc;

	/* <dst1 ET> */
	cmd.ce_fdsttype = parse_element_type(*argv);
	++argv; --argc;

	/* Check for voltag virtual type */
	if (CHET_VT == cmd.ce_fdsttype) {
		find_element(*argv, &cmd.ce_fdsttype, &cmd.ce_fdstunit);
	} else {
		/* <from EU> */
		cmd.ce_fdstunit = parse_element_unit(*argv);
	}
	++argv; --argc;

	/*
	 * If the next token is a special word or there are no more
	 * arguments, then this is a case of simple exchange.
	 * dst2 == src.
	 */
	if ((argc == 0) || is_special(*argv)) {
		cmd.ce_sdsttype = cmd.ce_srctype;
		cmd.ce_sdstunit = cmd.ce_srcunit;
		goto do_special;
	}

	/* <dst2 ET> */
	cmd.ce_sdsttype = parse_element_type(*argv);
	++argv; --argc;

	if (CHET_VT == cmd.ce_sdsttype)
		errx(1,"%s %s: voltag only makes sense as an element source",
		     cname, *argv);

	/* <dst2 EU> */
	cmd.ce_sdstunit = parse_element_unit(*argv);
	++argv; --argc;

 do_special:
	/* Deal with optional command modifiers. */
	while (argc) {
		val = parse_special(*argv);
		++argv; --argc;
		switch (val) {
		case SW_INVERT1:
			cmd.ce_flags |= CE_INVERT1;
			break;

		case SW_INVERT2:
			cmd.ce_flags |= CE_INVERT2;
			break;

		default:
			errx(1, "%s: inappropriate modifier `%s'",
			    cname, *argv);
			/* NOTREACHED */
		}
	}

	/* Send command to changer. */
	if (ioctl(changer_fd, CHIOEXCHANGE, &cmd))
		err(1, "%s: CHIOEXCHANGE", changer_name);

	return (0);

 usage:
	(void) fprintf(stderr,
	    "usage: %s %s <src ET> <src EU> <dst1 ET> <dst1 EU>\n"
	    "       [<dst2 ET> <dst2 EU>] [inv1] [inv2]\n",
	    getprogname(), cname);
	return (1);
}

static int
do_position(const char *cname, int argc, char **argv)
{
	struct changer_position cmd;
	int val;

	/*
	 * On a position command, we expect the following:
	 *
	 * <to ET> <to EU> [inv]
	 *
	 * where ET == element type and EU == element unit.
	 */

	++argv; --argc;

	if (argc < 2) {
		warnx("%s: too few arguments", cname);
		goto usage;
	} else if (argc > 3) {
		warnx("%s: too many arguments", cname);
		goto usage;
	}
	(void) memset(&cmd, 0, sizeof(cmd));

	/* <to ET>  */
	cmd.cp_type = parse_element_type(*argv);
	++argv; --argc;

	/* <to EU> */
	cmd.cp_unit = parse_element_unit(*argv);
	++argv; --argc;

	/* Deal with optional command modifier. */
	if (argc) {
		val = parse_special(*argv);
		switch (val) {
		case SW_INVERT:
			cmd.cp_flags |= CP_INVERT;
			break;

		default:
			errx(1, "%s: inappropriate modifier `%s'",
			    cname, *argv);
			/* NOTREACHED */
		}
	}

	/* Send command to changer. */
	if (ioctl(changer_fd, CHIOPOSITION, &cmd))
		err(1, "%s: CHIOPOSITION", changer_name);

	return (0);

 usage:
	(void) fprintf(stderr, "usage: %s %s <to ET> <to EU> [inv]\n",
	    getprogname(), cname);
	return (1);
}

/* ARGSUSED */
static int
do_params(const char *cname, int argc, char **argv)
{
	struct changer_params data;
	int picker;

	/* No arguments to this command. */

	++argv; --argc;

	if (argc) {
		warnx("%s: no arguments expected", cname);
		goto usage;
	}

	/* Get params from changer and display them. */
	(void) memset(&data, 0, sizeof(data));
	if (ioctl(changer_fd, CHIOGPARAMS, &data))
		err(1, "%s: CHIOGPARAMS", changer_name);

	(void) printf("%s: %d slot%s, %d drive%s, %d picker%s",
	    changer_name,
	    data.cp_nslots, (data.cp_nslots > 1) ? "s" : "",
	    data.cp_ndrives, (data.cp_ndrives > 1) ? "s" : "",
	    data.cp_npickers, (data.cp_npickers > 1) ? "s" : "");
	if (data.cp_nportals)
		(void) printf(", %d portal%s", data.cp_nportals,
		    (data.cp_nportals > 1) ? "s" : "");

	/* Get current picker from changer and display it. */
	if (ioctl(changer_fd, CHIOGPICKER, &picker))
		err(1, "%s: CHIOGPICKER", changer_name);

	(void) printf("\n%s: current picker: %d\n", changer_name, picker);

	return (0);

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

/* ARGSUSED */
static int
do_getpicker(const char *cname, int argc, char **argv)
{
	int picker;

	/* No arguments to this command. */

	++argv; --argc;

	if (argc) {
		warnx("%s: no arguments expected", cname);
		goto usage;
	}

	/* Get current picker from changer and display it. */
	if (ioctl(changer_fd, CHIOGPICKER, &picker))
		err(1, "%s: CHIOGPICKER", changer_name);

	(void) printf("%s: current picker: %d\n", changer_name, picker);

	return (0);

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

static int
do_setpicker(const char *cname, int argc, char **argv)
{
	int picker;

	++argv; --argc;

	if (argc < 1) {
		warnx("%s: too few arguments", cname);
		goto usage;
	} else if (argc > 1) {
		warnx("%s: too many arguments", cname);
		goto usage;
	}

	picker = parse_element_unit(*argv);

	/* Set the changer picker. */
	if (ioctl(changer_fd, CHIOSPICKER, &picker))
		err(1, "%s: CHIOSPICKER", changer_name);

	return (0);

 usage:
	(void) fprintf(stderr, "usage: %s %s <picker>\n", getprogname(), cname);
	return (1);
}

static int
do_status(const char *cname, int argc, char **argv)
{
	struct changer_params cp;
	struct changer_element_status_request cesr;
	int i;
	u_int16_t base, count, chet, schet, echet;
	const char *description;
	int pvoltag = 0;
	int avoltag = 0;
	int sense = 0;
	int scsi = 0;
	int source = 0;
	int intaddr = 0;
	int c;

	count = 0;
	base = 0;
	description = NULL;

	optind = optreset = 1;
	while ((c = getopt(argc, argv, "vVsSbaI")) != -1) {
		switch (c) {
		case 'v':
			pvoltag = 1;
			break;
		case 'V':
			avoltag = 1;
			break;
		case 's':
			sense = 1;
			break;
		case 'S':
			source = 1;
			break;
		case 'b':
			scsi = 1;
			break;
		case 'I':
			intaddr = 1;
			break;
		case 'a':
			pvoltag = avoltag = source = sense = scsi = intaddr = 1;
			break;
		default:
			warnx("%s: bad option", cname);
			goto usage;
		}
	}

	argc -= optind;
	argv += optind;

	/*
	 * On a status command, we expect the following:
	 *
	 * [<ET> [<start> [<end>] ] ]
	 *
	 * where ET == element type, start == first element to report,
	 * end == number of elements to report
	 *
	 * If we get no arguments, we get the status of all
	 * known element types.
	 */
	if (argc > 3) {
		warnx("%s: too many arguments", cname);
		goto usage;
	}

	/*
	 * Get params from changer.  Specifically, we need the element
	 * counts.
	 */
	if (ioctl(changer_fd, CHIOGPARAMS, (char *)&cp))
		err(1, "%s: CHIOGPARAMS", changer_name);

	if (argc > 0)
		schet = echet = parse_element_type(argv[0]);
	else {
		schet = CHET_MT;
		echet = CHET_DT;
	}
	if (argc > 1) {
		base = (u_int16_t)atol(argv[1]);
		count = 1;
	}
	if (argc > 2)
		count = (u_int16_t)atol(argv[2]) - base + 1;

	for (chet = schet; chet <= echet; ++chet) {
		switch (chet) {
		case CHET_MT:
			if (count == 0) 
				count = cp.cp_npickers;
			else if (count > cp.cp_npickers)
				errx(1, "not that many pickers in device");
			description = "picker";
			break;

		case CHET_ST:
			if (count == 0) 
				count = cp.cp_nslots;
			else if (count > cp.cp_nslots)
				errx(1, "not that many slots in device");
			description = "slot";
			break;

		case CHET_IE:
			if (count == 0) 
				count = cp.cp_nportals;
			else if (count > cp.cp_nportals)
				errx(1, "not that many portals in device");
			description = "portal";
			break;

		case CHET_DT:
			if (count == 0) 
				count = cp.cp_ndrives;
			else if (count > cp.cp_ndrives)
				errx(1, "not that many drives in device");
			description = "drive";
			break;
 
 		default:
 			/* To appease gcc -Wuninitialized. */
 			count = 0;
 			description = NULL;
		}

		if (count == 0) {
			if (argc == 0)
				continue;
			else {
				printf("%s: no %s elements\n",
				    changer_name, description);
				return (0);
			}
		}

		bzero(&cesr, sizeof(cesr));
		cesr.cesr_element_type = chet;
		cesr.cesr_element_base = base;
		cesr.cesr_element_count = count;
		/* Allocate storage for the status structures. */
		cesr.cesr_element_status =
		  (struct changer_element_status *) 
		  calloc((size_t)count, sizeof(struct changer_element_status));
		
		if (!cesr.cesr_element_status)
			errx(1, "can't allocate status storage");

		if (avoltag || pvoltag)
			cesr.cesr_flags |= CESR_VOLTAGS;

		if (ioctl(changer_fd, CHIOGSTATUS, (char *)&cesr)) {
			free(cesr.cesr_element_status);
			err(1, "%s: CHIOGSTATUS", changer_name);
		}

		/* Dump the status for each reported element. */
		for (i = 0; i < count; ++i) {
			struct changer_element_status *ces =
			         &(cesr.cesr_element_status[i]);
			printf("%s %d: %s", description, ces->ces_addr,
			    bits_to_string(ces->ces_flags,
					   CESTATUS_BITS));
			if (sense)
				printf(" sense: <0x%02x/0x%02x>",
				       ces->ces_sensecode, 
				       ces->ces_sensequal);
			if (pvoltag)
				printf(" voltag: <%s:%d>", 
				       ces->ces_pvoltag.cv_volid,
				       ces->ces_pvoltag.cv_serial);
			if (avoltag)
				printf(" avoltag: <%s:%d>", 
				       ces->ces_avoltag.cv_volid,
				       ces->ces_avoltag.cv_serial);
			if (source) {
				if (ces->ces_flags & CES_SOURCE_VALID)
					printf(" source: <%s %d>", 
					       element_type_name(
						       ces->ces_source_type),
					       ces->ces_source_addr);
				else
					printf(" source: <>");
			}
			if (intaddr)
				printf(" intaddr: <%d>", ces->ces_int_addr);
			if (scsi) {
				printf(" scsi: <");
				if (ces->ces_flags & CES_SCSIID_VALID)
					printf("%d", ces->ces_scsi_id);
				else
					putchar('?');
				putchar(':');
				if (ces->ces_flags & CES_LUN_VALID)
					printf("%d", ces->ces_scsi_lun);
				else
					putchar('?');
				putchar('>');
			}
			putchar('\n');
		}

		free(cesr.cesr_element_status);
		count = 0;
	}

	return (0);

 usage:
	(void) fprintf(stderr, "usage: %s %s [-vVsSbaA] [<element type> [<start-addr> [<end-addr>] ] ]\n",
		       getprogname(), cname);
	return (1);
}

static int
do_ielem(const char *cname, int argc, char **argv)
{
	int timeout = 0;

	if (argc == 2) {
		timeout = atol(argv[1]);
	} else if (argc > 1) {
		warnx("%s: too many arguments", cname);
		goto usage;
	}

	if (ioctl(changer_fd, CHIOIELEM, &timeout))
		err(1, "%s: CHIOIELEM", changer_name);

	return (0);

 usage:
	(void) fprintf(stderr, "usage: %s %s [<timeout>]\n",
		       getprogname(), cname);
	return (1);
}

static int
do_voltag(const char *cname, int argc, char **argv)
{
	int force = 0;
	int clear = 0;
	int alternate = 0;
	int c;
	struct changer_set_voltag_request csvr;

	bzero(&csvr, sizeof(csvr));

	optind = optreset = 1;
	while ((c = getopt(argc, argv, "fca")) != -1) {
		switch (c) {
		case 'f':
			force = 1;
			break;
		case 'c':
			clear = 1;
			break;
		case 'a':
			alternate = 1;
			break;
		default:
			warnx("%s: bad option", cname);
			goto usage;
		}
	}

	argc -= optind;
	argv += optind;

	if (argc < 2) {
		warnx("%s: missing element specification", cname);
		goto usage;
	}

	csvr.csvr_type = parse_element_type(argv[0]);
	csvr.csvr_addr = (u_int16_t)atol(argv[1]);

	if (!clear) {
		if (argc < 3 || argc > 4) {
			warnx("%s: missing argument", cname);
			goto usage;
		}

		if (force)
			csvr.csvr_flags = CSVR_MODE_REPLACE;
		else
			csvr.csvr_flags = CSVR_MODE_SET;

		if (strlen(argv[2]) > sizeof(csvr.csvr_voltag.cv_volid)) {
			warnx("%s: volume label too long", cname);
			goto usage;
		}

		strlcpy((char *)csvr.csvr_voltag.cv_volid, argv[2],
		       sizeof(csvr.csvr_voltag.cv_volid));

		if (argc == 4) {
			csvr.csvr_voltag.cv_serial = (u_int16_t)atol(argv[3]);
		}
	} else {
		if (argc != 2) {
			warnx("%s: unexpected argument", cname);
			goto usage;
		}
		csvr.csvr_flags = CSVR_MODE_CLEAR;
	}

	if (alternate) {
		csvr.csvr_flags |= CSVR_ALTERNATE;
	}

	if (ioctl(changer_fd, CHIOSETVOLTAG, &csvr))
		err(1, "%s: CHIOSETVOLTAG", changer_name);

	return 0;
 usage:
	(void) fprintf(stderr, 
		       "usage: %s %s [-fca] <element> [<voltag> [<vsn>] ]\n",
		       getprogname(), cname);
	return 1;
}

static u_int16_t
parse_element_type(char *cp)
{
	int i;

	for (i = 0; elements[i].et_name != NULL; ++i)
		if (strcmp(elements[i].et_name, cp) == 0)
			return ((u_int16_t)elements[i].et_type);

	errx(1, "invalid element type `%s'", cp);
	/* NOTREACHED */
}

static const char *
element_type_name(int et)
{
	int i;

	for (i = 0; elements[i].et_name != NULL; i++)
		if (elements[i].et_type == et)
			return elements[i].et_name;

	return "unknown";
}

static u_int16_t
parse_element_unit(char *cp)
{
	int i;
	char *p;

	i = (int)strtol(cp, &p, 10);
	if ((i < 0) || (*p != '\0'))
		errx(1, "invalid unit number `%s'", cp);

	return ((u_int16_t)i);
}

static int
parse_special(char *cp)
{
	int val;

	val = is_special(cp);
	if (val)
		return (val);

	errx(1, "invalid modifier `%s'", cp);
	/* NOTREACHED */
}

static int
is_special(char *cp)
{
	int i;

	for (i = 0; specials[i].sw_name != NULL; ++i)
		if (strcmp(specials[i].sw_name, cp) == 0)
			return (specials[i].sw_value);

	return (0);
}

static const char *
bits_to_string(ces_status_flags v, const char *cp)
{
	const char *np;
	char f, sep, *bp;
	static char buf[128];

	bp = buf;
	(void) memset(buf, 0, sizeof(buf));

	for (sep = '<'; (f = *cp++) != 0; cp = np) {
		for (np = cp; *np >= ' ';)
			np++;
		if (((int)v & (1 << (f - 1))) == 0)
			continue;
		(void) snprintf(bp, sizeof(buf) - (size_t)(bp - &buf[0]),
			"%c%.*s", sep, (int)(long)(np - cp), cp);
		bp += strlen(bp);
		sep = ',';
	}
	if (sep != '<')
		*bp = '>';

	return (buf);
}
/*
 * do_return()
 * 
 * Given an element reference, ask the changer/picker to move that
 * element back to its source slot.
 */
static int
do_return(const char *cname, int argc, char **argv)
{
	struct changer_element_status *ces;
	struct changer_move cmd;
	uint16_t	type, element;

	++argv; --argc;

	if (argc < 2) {
		warnx("%s: too few arguments", cname);
		goto usage;
	} else if (argc > 3) {
		warnx("%s: too many arguments", cname);
		goto usage;
	}

	type = parse_element_type(*argv);
	++argv; --argc;
	
	/* Handle voltag virtual Changer Element Type */
	if (CHET_VT == type) {
		find_element(*argv, &type, &element);
	} else {
		element = parse_element_unit(*argv);
	}
	++argv; --argc;

	/* Get the status */
	ces = get_element_status((unsigned int)type, (unsigned int)element);

	if (NULL == ces)
		errx(1, "%s: null element status pointer", cname);

	if (!(ces->ces_flags & CES_SOURCE_VALID))
		errx(1, "%s: no source information", cname);

	(void) memset(&cmd, 0, sizeof(cmd));

	cmd.cm_fromtype = type;
	cmd.cm_fromunit = element;
	cmd.cm_totype = ces->ces_source_type;
	cmd.cm_tounit = ces->ces_source_addr;

	if (ioctl(changer_fd, CHIOMOVE, &cmd) == -1)
		err(1, "%s: CHIOMOVE", changer_name);
	free(ces);

	return(0);

usage:
	(void) fprintf(stderr, "usage: %s %s "
	    "<from ET> <from EU>\n", getprogname(), cname);
	return(1);
}

/*
 * get_element_status()
 *
 * return a *cesr for the specified changer element.  This
 * routing will malloc()/calloc() the memory.  The caller
 * should free() it when done.
 */
static struct changer_element_status *
get_element_status(unsigned int type, unsigned int element)
{
	struct changer_element_status_request cesr;
	struct changer_element_status *ces;
	
	ces = (struct changer_element_status *)
	    calloc((size_t)1, sizeof(struct changer_element_status));

	if (NULL == ces)
		errx(1, "can't allocate status storage");

	(void)memset(&cesr, 0, sizeof(cesr));

	cesr.cesr_element_type = (uint16_t)type;
	cesr.cesr_element_base = (uint16_t)element;
	cesr.cesr_element_count = 1;		/* Only this one element */
	cesr.cesr_flags |= CESR_VOLTAGS;	/* Grab voltags as well */
	cesr.cesr_element_status = ces;

	if (ioctl(changer_fd, CHIOGSTATUS, (char *)&cesr) == -1) {
		free(ces);
		err(1, "%s: CHIOGSTATUS", changer_name);
		/* NOTREACHED */
	}

	return ces;
}


/*
 * find_element()
 * 
 * Given a <voltag> find the chager element and unit, or exit
 * with an error if it isn't found.  We grab the changer status
 * and iterate until we find a match, or crap out.
 */
static void
find_element(char *voltag, uint16_t *et, uint16_t *eu)
{
	struct changer_params cp;
	struct changer_element_status_request cesr;
	struct changer_element_status *ch_ces, *ces;
	int found = 0;
	size_t elem, total_elem;

	/*
	 * Get the changer parameters, we're interested in the counts
	 * for all types of elements to perform our search.
	 */
	if (ioctl(changer_fd, CHIOGPARAMS, (char *)&cp))
		err(1, "%s: CHIOGPARAMS", changer_name);

	/* Allocate some memory for the results */
	total_elem = (cp.cp_nslots + cp.cp_ndrives
	    + cp.cp_npickers + cp.cp_nportals);
	
	ch_ces = (struct changer_element_status *)
	    calloc(total_elem, sizeof(struct changer_element_status));

	if (NULL == ch_ces)
		errx(1, "can't allocate status storage");

	ces = ch_ces;

	/* Read in the changer slots */
	if (cp.cp_nslots > 0) {
		cesr.cesr_element_type = CHET_ST;
		cesr.cesr_element_base = 0;
		cesr.cesr_element_count = cp.cp_nslots;
		cesr.cesr_flags |= CESR_VOLTAGS;
		cesr.cesr_element_status = ces;

		if (ioctl(changer_fd, CHIOGSTATUS, (char *)&cesr) == -1) {
			free(ch_ces);
			err(1, "%s: CHIOGSTATUS", changer_name);
		}
		ces += cp.cp_nslots;
	}	

	/* Read in the drive information */
	if (cp.cp_ndrives > 0 ) {

		(void) memset(&cesr, 0, sizeof(cesr));
		cesr.cesr_element_type = CHET_DT;
		cesr.cesr_element_base = 0;
		cesr.cesr_element_count = cp.cp_ndrives;
		cesr.cesr_flags |= CESR_VOLTAGS;
		cesr.cesr_element_status = ces;

		if (ioctl(changer_fd, CHIOGSTATUS, (char *)&cesr) == -1) {
			free(ch_ces);
			err(1, "%s: CHIOGSTATUS", changer_name);
		}
		ces += cp.cp_ndrives;
	}

	/* Read in the portal information */
	if (cp.cp_nportals > 0 ) {
		(void) memset(&cesr, 0, sizeof(cesr));
		cesr.cesr_element_type = CHET_IE;
		cesr.cesr_element_base = 0;
		cesr.cesr_element_count = cp.cp_nportals;
		cesr.cesr_flags |= CESR_VOLTAGS;
		cesr.cesr_element_status = ces;

		if (ioctl(changer_fd, CHIOGSTATUS, (char *)&cesr) == -1) {
			free(ch_ces);
			err(1, "%s: CHIOGSTATUS", changer_name);
		}
		ces += cp.cp_nportals;
	}

	/* Read in the picker information */
	if (cp.cp_npickers > 0) {
		(void) memset(&cesr, 0, sizeof(cesr));
		cesr.cesr_element_type = CHET_MT;
		cesr.cesr_element_base = 0;
		cesr.cesr_element_count = cp.cp_npickers;
		cesr.cesr_flags |= CESR_VOLTAGS;
		cesr.cesr_element_status = ces;

		if (ioctl(changer_fd, CHIOGSTATUS, (char *)&cesr) == -1) {
			free(ch_ces);
			err(1, "%s: CHIOGSTATUS", changer_name);
		}
	}

	/*
	 * Now search the list the specified <voltag>
	 */	
	for (elem = 0; elem <= total_elem; ++elem) {

		ces = &ch_ces[elem];

		/* Make sure we have a tape in this element */
		if ((ces->ces_flags & (CES_STATUS_ACCESS|CES_STATUS_FULL))
		    != (CES_STATUS_ACCESS|CES_STATUS_FULL))
			continue;

		/* Check to see if it is our target */
		if (strcasecmp(voltag,
		    (const char *)ces->ces_pvoltag.cv_volid) == 0) {
			*et = ces->ces_type;
			*eu = ces->ces_addr;
			++found;
			break;
		}
	}
	if (!found) {
		errx(1, "%s: unable to locate voltag: %s", changer_name,
		     voltag);
	}
	free(ch_ces);
	return;
}

static void
cleanup(void)
{
	/* Simple enough... */
	(void)close(changer_fd);
}

static void
usage(void)
{
	(void)fprintf(stderr, "usage: %s [-f changer] command [-<flags>] "
		"arg1 arg2 [arg3 [...]]\n", getprogname());
	exit(1);
}
OpenPOWER on IntegriCloud