cdcontrol.c revision 13865 
1/*
2 * Compact Disc Control Utility by Serge V. Vakulenko, <vak@cronyx.ru>.
3 * Based on the non-X based CD player by Jean-Marc Zucconi and
4 * Andrey A. Chernov.
5 */
6#include <stdio.h>
7#include <stdlib.h>
8#include <string.h>
9#include <unistd.h>
10#include <errno.h>
11#include <sys/file.h>
12#include <sys/cdio.h>
13#include <sys/ioctl.h>
14
15#define VERSION "1.1"
16
17/*
18 * Audio Status Codes
19 */
20#define ASTS_INVALID    0x00    /* Audio status byte not valid */
21#define ASTS_PLAYING    0x11    /* Audio play operation in progress */
22#define ASTS_PAUSED     0x12    /* Audio play operation paused */
23#define ASTS_COMPLETED  0x13    /* Audio play operation successfully completed */
24#define ASTS_ERROR      0x14    /* Audio play operation stopped due to error */
25#define ASTS_VOID       0x15    /* No current audio status to return */
26
27struct cmdtab {
28	int command;
29	char *name;
30	char *args;
31} cmdtab[] = {
32#define CMD_DEBUG       1
33	{ CMD_DEBUG,    "Debug",        "[ on | off | reset ]", },
34#define CMD_EJECT       2
35	{ CMD_EJECT,    "Eject",        "", },
36#define CMD_HELP        3
37	{ CMD_HELP,     "?",            0, },
38	{ CMD_HELP,     "Help",         "", },
39#define CMD_INFO        4
40	{ CMD_INFO,     "INFo",         "", },
41#define CMD_INJECT      5
42	{ CMD_INJECT,   "INJect",       "", },
43#define CMD_PAUSE       6
44	{ CMD_PAUSE,    "PAuse",        "", },
45#define CMD_PLAY        7
46	{ CMD_PLAY,     "PLay",        "min1:sec1[.fr1] [min2:sec2[.fr2]]", },
47	{ CMD_PLAY,     "PLay",        "track1[.index1] [track2.[index2]]", },
48	{ CMD_PLAY,     "PLay",        "[#block [len]]", },
49#define CMD_QUIT        8
50	{ CMD_QUIT,     "Quit",         "", },
51#define CMD_RESUME      9
52	{ CMD_RESUME,   "Resume",       "", },
53#define CMD_STOP        10
54	{ CMD_STOP,     "Stop",         "", },
55#define CMD_VOLUME      11
56	{ CMD_VOLUME,   "Volume",       "<l> <r> | left | right | mute | mono | stereo", },
57	{ 0,            0, },
58};
59
60struct cd_toc_entry toc_buffer[100];
61
62char *cdname;
63int fd = -1;
64int verbose = 1;
65
66extern char *optarg;
67extern int optind;
68
69int setvol (int, int);
70int read_toc_entrys (int);
71int play_msf (int, int, int, int, int, int);
72int play_track (int, int, int, int);
73int get_vol (int *, int *);
74int status (int *, int *, int *, int *);
75int open_cd (void);
76int play (char *arg);
77int info (char *arg);
78char *input (int*);
79void prtrack (struct cd_toc_entry *e, int lastflag);
80void lba2msf (int lba, u_char *m, u_char *s, u_char *f);
81int msf2lba (u_char m, u_char s, u_char f);
82int play_blocks (int blk, int len);
83int run (int cmd, char *arg);
84char *parse (char *buf, int *cmd);
85
86extern int errno;
87
88void help ()
89{
90	struct cmdtab *c;
91
92	for (c=cmdtab; c->name; ++c) {
93		if (! c->args)
94			continue;
95		printf ("\t%s", c->name);
96		if (*c->args)
97			printf (" %s", c->args);
98		printf ("\n");
99	}
100}
101
102void usage ()
103{
104	printf ("Usage:\n\tcdcontrol [ -vs ] [ -f disc ] [ command args... ]\n");
105	printf ("Options:\n");
106	printf ("\t-v       - verbose mode\n");
107	printf ("\t-s       - silent mode\n");
108	printf ("\t-f disc  - device name such as /dev/cd0c\n");
109	printf ("\tDISC     - shell variable with device name\n");
110	printf ("Commands:\n");
111	help ();
112	exit (1);
113}
114
115int main (int argc, char **argv)
116{
117	int cmd;
118	char *arg;
119
120	cdname = getenv ("DISC");
121	if (! cdname)
122		cdname = getenv ("CDPLAY");
123
124	for (;;) {
125		switch (getopt (argc, argv, "svhf:")) {
126		case EOF:
127			break;
128		case 's':
129			verbose = 0;
130			continue;
131		case 'v':
132			verbose = 2;
133			continue;
134		case 'f':
135			cdname = optarg;
136			continue;
137		case 'h':
138		default:
139			usage ();
140		}
141		break;
142	}
143	argc -= optind;
144	argv += optind;
145
146	if (argc > 0 && strcasecmp (*argv, "help") == 0)
147		usage ();
148
149	if (! cdname) {
150		fprintf (stderr, "No CD device name specified.\n");
151		usage ();
152	}
153
154	if (argc > 0) {
155		char buf[80], *p;
156		int len;
157
158		for (p=buf; argc-- > 0; ++argv) {
159			len = strlen (*argv);
160			if (p + len >= buf + sizeof (buf) - 1)
161				usage ();
162			if (p > buf)
163				*p++ = ' ';
164			strcpy (p, *argv);
165			p += len;
166		}
167		*p = 0;
168		arg = parse (buf, &cmd);
169		return run (cmd, arg);
170	}
171
172	if (verbose == 1)
173		verbose = isatty (0);
174	if (verbose) {
175		printf ("Compact Disc Control Utility, Version %s\n", VERSION);
176		printf ("Type `?' for command list\n\n");
177	}
178
179	for (;;) {
180		arg = input (&cmd);
181		if (run (cmd, arg) < 0) {
182			if (verbose)
183				perror ("cdcontrol");
184			close (fd);
185			fd = -1;
186		}
187		fflush (stdout);
188	}
189}
190
191int run (int cmd, char *arg)
192{
193	int l, r, rc;
194
195	switch (cmd) {
196	case CMD_QUIT:
197		exit (0);
198
199	default:
200	case CMD_HELP:
201		help ();
202		return (0);
203
204	case CMD_INFO:
205		if (fd<0 && ! open_cd ()) return (0);
206		return info (arg);
207
208	case CMD_PAUSE:
209		if (fd<0 && ! open_cd ()) return (0);
210		return ioctl (fd, CDIOCPAUSE);
211
212	case CMD_RESUME:
213		if (fd<0 && ! open_cd ()) return (0);
214		return ioctl (fd, CDIOCRESUME);
215
216	case CMD_STOP:
217		if (fd<0 && ! open_cd ()) return (0);
218		return ioctl (fd, CDIOCSTOP);
219
220	case CMD_DEBUG:
221		if (fd<0 && ! open_cd ()) return (0);
222		if (strcasecmp (arg, "on") == 0)
223			return ioctl (fd, CDIOCSETDEBUG);
224		if (strcasecmp (arg, "off") == 0)
225			return ioctl (fd, CDIOCCLRDEBUG);
226		if (strcasecmp (arg, "reset") == 0)
227			return ioctl (fd, CDIOCRESET);
228		printf ("Invalid command arguments\n");
229		return (0);
230
231	case CMD_EJECT:
232		if (fd<0 && ! open_cd ()) return (0);
233		(void) ioctl (fd, CDIOCALLOW);
234		rc = ioctl (fd, CDIOCEJECT);
235		if (rc < 0)
236			return (rc);
237		return (0);
238
239	case CMD_INJECT:
240		if (fd<0 && ! open_cd ()) return (0);
241		rc = ioctl (fd, CDIOCCLOSE);
242		if (rc < 0)
243			return (rc);
244		close(fd);
245		fd = -1;
246		return (0);
247
248	case CMD_PLAY:
249		if (fd<0 && ! open_cd ()) return (0);
250		return play (arg);
251
252	case CMD_VOLUME:
253		if (fd<0 && ! open_cd ()) return (0);
254
255		if (strcasecmp (arg, "left") == 0)
256			return ioctl (fd, CDIOCSETLEFT);
257		else if (strcasecmp (arg, "right") == 0)
258			return ioctl (fd, CDIOCSETRIGHT);
259		else if (strcasecmp (arg, "mute") == 0)
260			return ioctl (fd, CDIOCSETMUTE);
261		else if (strcasecmp (arg, "mono") == 0)
262			return ioctl (fd, CDIOCSETMONO);
263		else if (strcasecmp (arg, "stereo") == 0)
264			return ioctl (fd, CDIOCSETSTERIO);
265
266		if (2 != sscanf (arg, "%d %d", &l, &r)) {
267			printf ("Invalid command arguments\n");
268			return (0);
269		}
270		return setvol (l, r);
271	}
272}
273
274int play (char *arg)
275{
276	struct ioc_toc_header h;
277	int rc, n, start, end = 0, istart = 1, iend = 1;
278
279	rc = ioctl (fd, CDIOREADTOCHEADER, &h);
280	if (rc < 0)
281		return (rc);
282
283	n = h.ending_track - h.starting_track + 1;
284	rc = read_toc_entrys ((n + 1) * sizeof (struct cd_toc_entry));
285	if (rc < 0)
286		return (rc);
287
288	if (! *arg)
289		/*
290		 * Play the whole disc
291		 */
292		return play_blocks (0, msf2lba (toc_buffer[n].addr.msf.minute,
293			toc_buffer[n].addr.msf.second,
294			toc_buffer[n].addr.msf.frame));
295
296	if (strchr (arg, '#')) {
297		/*
298		 * Play block #blk [ len ]
299		 */
300		int blk, len = 0;
301
302		if (2 != sscanf (arg, "#%d%d", &blk, &len) &&
303		    1 != sscanf (arg, "#%d", &blk)) {
304err:                    printf ("Invalid command arguments\n");
305			return (0);
306		}
307		if (len == 0)
308			len = msf2lba (toc_buffer[n].addr.msf.minute,
309				toc_buffer[n].addr.msf.second,
310				toc_buffer[n].addr.msf.frame) - blk;
311		return play_blocks (blk, len);
312	}
313
314	if (strchr (arg, ':')) {
315		/*
316		 * Play MSF m1:s1 [ .f1 ] [ m2:s2 [ .f2 ] ]
317		 */
318		int m1, m2 = 0, s1, s2 = 0, f1 = 0, f2 = 0;
319
320		if (6 != sscanf (arg, "%d:%d.%d%d:%d.%d", &m1, &s1, &f1, &m2, &s2, &f2) &&
321		    5 != sscanf (arg, "%d:%d.%d%d:%d", &m1, &s1, &f1, &m2, &s2) &&
322		    5 != sscanf (arg, "%d:%d%d:%d.%d", &m1, &s1, &m2, &s2, &f2) &&
323		    3 != sscanf (arg, "%d:%d.%d", &m1, &s1, &f1) &&
324		    4 != sscanf (arg, "%d:%d%d:%d", &m1, &s1, &m2, &s2) &&
325		    2 != sscanf (arg, "%d:%d", &m1, &s1))
326			goto err;
327		if (m2 == 0) {
328			m2 = toc_buffer[n].addr.msf.minute;
329			s2 = toc_buffer[n].addr.msf.second;
330			f2 = toc_buffer[n].addr.msf.frame;
331		}
332		return play_msf (m1, s1, f1, m2, s2, f2);
333	}
334
335	/*
336	 * Play track trk1 [ .idx1 ] [ trk2 [ .idx2 ] ]
337	 */
338	if (4 != sscanf (arg, "%d.%d%d.%d", &start, &istart, &end, &iend) &&
339	    3 != sscanf (arg, "%d.%d%d", &start, &istart, &end) &&
340	    3 != sscanf (arg, "%d%d.%d", &start, &end, &iend) &&
341	    2 != sscanf (arg, "%d.%d", &start, &istart) &&
342	    2 != sscanf (arg, "%d%d", &start, &end) &&
343	    1 != sscanf (arg, "%d", &start))
344		goto err;
345	if (end == 0)
346		end = n;
347	return play_track (start, istart, end, iend);
348}
349
350char *strstatus (int sts)
351{
352	switch (sts) {
353	case ASTS_INVALID:   return ("invalid");
354	case ASTS_PLAYING:   return ("playing");
355	case ASTS_PAUSED:    return ("paused");
356	case ASTS_COMPLETED: return ("completed");
357	case ASTS_ERROR:     return ("error");
358	case ASTS_VOID:      return ("void");
359	default:             return ("??");
360	}
361}
362
363int info (char *arg)
364{
365	struct ioc_toc_header h;
366	struct ioc_vol v;
367	int rc, i, n, trk, m, s, f;
368
369	rc = status (&trk, &m, &s, &f);
370	if (rc >= 0)
371		if (verbose)
372			printf ("Audio status = %d<%s>, current track = %d, current position = %d:%02d.%02d\n",
373				rc, strstatus (rc), trk, m, s, f);
374		else
375			printf ("%d %d %d:%02d.%02d\n", rc, trk, m, s, f);
376	else
377		printf ("No current status info\n");
378
379	rc = ioctl (fd, CDIOCGETVOL, &v);
380	if (rc >= 0)
381		if (verbose)
382			printf ("Left volume = %d, right volume = %d\n",
383				v.vol[0], v.vol[1]);
384		else
385			printf ("%d %d\n", v.vol[0], v.vol[1]);
386	else
387		printf ("No volume info\n");
388
389	rc = ioctl (fd, CDIOREADTOCHEADER, &h);
390	if (rc >= 0)
391		if (verbose)
392			printf ("Starting track = %d, ending track = %d, TOC size = %d bytes\n",
393				h.starting_track, h.ending_track, h.len);
394		else
395			printf ("%d %d %d\n", h.starting_track,
396				h.ending_track, h.len);
397	else {
398		perror ("getting toc header");
399		return (rc);
400	}
401
402	n = h.ending_track - h.starting_track + 1;
403	rc = read_toc_entrys ((n + 1) * sizeof (struct cd_toc_entry));
404	if (rc < 0)
405		return (rc);
406	if (verbose) {
407		printf ("track     start  duration   block  length   type\n");
408		printf ("-------------------------------------------------\n");
409	}
410	for (i = 0; i < n; i++) {
411		printf ("%5d  ", toc_buffer[i].track);
412		prtrack (toc_buffer + i, 0);
413	}
414	printf ("  end  ");
415	prtrack (toc_buffer + n, 1);
416	return (0);
417}
418
419void lba2msf (int lba, u_char *m, u_char *s, u_char *f)
420{
421	lba += 150;             /* block start offset */
422	lba &= 0xffffff;        /* negative lbas use only 24 bits */
423	*m = lba / (60 * 75);
424	lba %= (60 * 75);
425	*s = lba / 75;
426	*f = lba % 75;
427}
428
429int msf2lba (u_char m, u_char s, u_char f)
430{
431	return (((m * 60) + s) * 75 + f) - 150;
432}
433
434void prtrack (struct cd_toc_entry *e, int lastflag)
435{
436	int block, next, len;
437	u_char m, s, f;
438
439	/* Print track start */
440	printf ("%2d:%02d.%02d  ", e->addr.msf.minute,
441		e->addr.msf.second, e->addr.msf.frame);
442
443	block = msf2lba (e->addr.msf.minute, e->addr.msf.second,
444		e->addr.msf.frame);
445	if (lastflag) {
446		/* Last track -- print block */
447		printf ("       -  %6d       -      -\n", block);
448		return;
449	}
450
451	next = msf2lba (e[1].addr.msf.minute, e[1].addr.msf.second,
452		e[1].addr.msf.frame);
453	len = next - block;
454	lba2msf (len, &m, &s, &f);
455
456	/* Print duration, block, length, type */
457	printf ("%2d:%02d.%02d  %6d  %6d  %5s\n", m, s, f, block, len,
458		e->control & 4 ? "data" : "audio");
459}
460
461int play_track (int tstart, int istart, int tend, int iend)
462{
463	struct ioc_play_track t;
464
465	t.start_track = tstart;
466	t.start_index = istart;
467	t.end_track = tend;
468	t.end_index = iend;
469	return ioctl (fd, CDIOCPLAYTRACKS, &t);
470}
471
472int play_blocks (int blk, int len)
473{
474	struct ioc_play_blocks t;
475
476	t.blk = blk;
477	t.len = len;
478	return ioctl (fd, CDIOCPLAYBLOCKS, &t);
479}
480
481int setvol (int l, int r)
482{
483	struct ioc_vol v;
484
485	v.vol[0] = l;
486	v.vol[1] = r;
487	v.vol[2] = 0;
488	v.vol[3] = 0;
489	return ioctl (fd, CDIOCSETVOL, &v);
490}
491
492int read_toc_entrys (int len)
493{
494	struct ioc_read_toc_entry t;
495
496	t.address_format = CD_MSF_FORMAT;
497	t.starting_track = 0;
498	t.data_len = len;
499	t.data = toc_buffer;
500	return ioctl (fd, CDIOREADTOCENTRYS, (char *) &t);
501}
502
503int play_msf (int start_m, int start_s, int start_f,
504     int end_m, int end_s, int end_f)
505{
506	struct ioc_play_msf a;
507
508	a.start_m = start_m;
509	a.start_s = start_s;
510	a.start_f = start_f;
511	a.end_m = end_m;
512	a.end_s = end_s;
513	a.end_f = end_f;
514	return ioctl (fd, CDIOCPLAYMSF, (char *) &a);
515}
516
517int status (int *trk, int *min, int *sec, int *frame)
518{
519	struct ioc_read_subchannel s;
520	struct cd_sub_channel_info data;
521
522	bzero (&s, sizeof (s));
523	s.data = &data;
524	s.data_len = sizeof (data);
525	s.address_format = CD_MSF_FORMAT;
526	s.data_format = CD_CURRENT_POSITION;
527	if (ioctl (fd, CDIOCREADSUBCHANNEL, (char *) &s) < 0)
528		return -1;
529	*trk = s.data->what.position.track_number;
530	*min = s.data->what.position.reladdr.msf.minute;
531	*sec = s.data->what.position.reladdr.msf.second;
532	*frame = s.data->what.position.reladdr.msf.frame;
533	return s.data->header.audio_status;
534}
535
536char *input (int *cmd)
537{
538	static char buf[80];
539	char *p;
540
541	do {
542		if (verbose)
543			fprintf (stderr, "cd> ");
544		if (! fgets (buf, sizeof (buf), stdin)) {
545			*cmd = CMD_QUIT;
546			return 0;
547		}
548		p = parse (buf, cmd);
549	} while (! p);
550	return (p);
551}
552
553char *parse (char *buf, int *cmd)
554{
555	struct cmdtab *c;
556	char *p;
557	int len;
558
559	for (p=buf; *p; ++p)
560		if (*p == '\t')
561			*p = ' ';
562		else if (*p == '\n')
563			*p = 0;
564
565	for (p=buf; *p; ++p)
566		if (*p == ' ') {
567			*p++ = 0;
568			break;
569		}
570	while (*p == ' ')
571		++p;
572
573	len = strlen (buf);
574	if (! len)
575		return (0);
576	*cmd = -1;
577	for (c=cmdtab; c->name; ++c) {
578		/* Try short command form. */
579		if (! c->args && len == strlen (c->name) &&
580		    strncasecmp (buf, c->name, len) == 0) {
581			*cmd = c->command;
582			break;
583		}
584
585		/* Try long form. */
586		if (strncasecmp (buf, c->name, len) != 0)
587			continue;
588
589		/* Check inambiguity. */
590		if (*cmd != -1 && *cmd != c->command) {
591			fprintf (stderr, "Ambiguous command\n");
592			return (0);
593		}
594		*cmd = c->command;
595	}
596	if (*cmd == -1) {
597		fprintf (stderr, "Invalid command, enter ``help'' for command list\n");
598		return (0);
599	}
600	return p;
601}
602
603int open_cd ()
604{
605	char devbuf[80];
606
607	if (fd > -1)
608		return (1);
609	if (*cdname == '/')
610		strcpy (devbuf, cdname);
611	else if (*cdname == 'r')
612		sprintf (devbuf, "/dev/%s", cdname);
613	else
614		sprintf (devbuf, "/dev/r%s", cdname);
615	fd = open (devbuf, O_RDONLY);
616	if (fd < 0 && errno == ENOENT) {
617		strcat (devbuf, "c");
618		fd = open (devbuf, O_RDONLY);
619	}
620	if (fd < 0) {
621		if (errno != ENXIO) {
622			perror (devbuf);
623			exit (1);
624		}
625		/* open says 'Device not configured' if no cd in */
626		fprintf (stderr, "open: No CD in\n");
627		return (0);
628	}
629	return (1);
630}
631