Mercurial > sdl-ios-xcode
annotate src/cdrom/openbsd/SDL_syscdrom.c @ 1379:c0a74f199ecf
Use only safe string functions
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 19 Feb 2006 23:46:34 +0000 |
parents | 19418e4422cb |
children | d910939febfa |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
22 | |
23 /* Functions for system-level CD-ROM audio control */ | |
24 | |
25 #include <sys/types.h> | |
26 #include <sys/ioctl.h> | |
27 #include <sys/stat.h> | |
28 #include <fcntl.h> | |
29 #include <errno.h> | |
30 #include <unistd.h> | |
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31 #include <sys/ioctl.h> |
0 | 32 #include <sys/cdio.h> |
33 | |
34 #include "SDL_cdrom.h" | |
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35 #include "../SDL_syscdrom.h" |
0 | 36 |
37 | |
38 /* The maximum number of CD-ROM drives we'll detect */ | |
39 #define MAX_DRIVES 16 | |
40 | |
41 /* A list of available CD-ROM drives */ | |
42 static char *SDL_cdlist[MAX_DRIVES]; | |
43 static dev_t SDL_cdmode[MAX_DRIVES]; | |
44 | |
45 /* The system-dependent CD control functions */ | |
46 static const char *SDL_SYS_CDName(int drive); | |
47 static int SDL_SYS_CDOpen(int drive); | |
48 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
49 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
50 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
51 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
52 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
53 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
54 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
55 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
56 | |
57 /* Some ioctl() errno values which occur when the tray is empty */ | |
58 #define ERRNO_TRAYEMPTY(errno) \ | |
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59 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL) || \ |
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60 (errno == ENODEV)) |
0 | 61 |
62 /* Check a drive to see if it is a CD-ROM */ | |
63 static int CheckDrive(char *drive, struct stat *stbuf) | |
64 { | |
65 int is_cd, cdfd; | |
66 struct ioc_read_subchannel info; | |
67 | |
68 /* If it doesn't exist, return -1 */ | |
69 if ( stat(drive, stbuf) < 0 ) { | |
70 return(-1); | |
71 } | |
72 | |
73 /* If it does exist, verify that it's an available CD-ROM */ | |
74 is_cd = 0; | |
75 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
76 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
77 if ( cdfd >= 0 ) { | |
78 info.address_format = CD_MSF_FORMAT; | |
79 info.data_format = CD_CURRENT_POSITION; | |
80 info.data_len = 0; | |
81 info.data = NULL; | |
82 /* Under Linux, EIO occurs when a disk is not present. | |
83 This isn't 100% reliable, so we use the USE_MNTENT | |
84 code above instead. | |
85 */ | |
86 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || | |
87 ERRNO_TRAYEMPTY(errno) ) { | |
88 is_cd = 1; | |
89 } | |
90 close(cdfd); | |
91 } | |
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92 else if (ERRNO_TRAYEMPTY(errno)) |
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93 is_cd = 1; |
0 | 94 } |
95 return(is_cd); | |
96 } | |
97 | |
98 /* Add a CD-ROM drive to our list of valid drives */ | |
99 static void AddDrive(char *drive, struct stat *stbuf) | |
100 { | |
101 int i; | |
102 | |
103 if ( SDL_numcds < MAX_DRIVES ) { | |
104 /* Check to make sure it's not already in our list. | |
105 This can happen when we see a drive via symbolic link. | |
106 */ | |
107 for ( i=0; i<SDL_numcds; ++i ) { | |
108 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
109 #ifdef DEBUG_CDROM | |
110 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
111 #endif | |
112 return; | |
113 } | |
114 } | |
115 | |
116 /* Add this drive to our list */ | |
117 i = SDL_numcds; | |
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118 SDL_cdlist[i] = SDL_strdup(drive); |
0 | 119 if ( SDL_cdlist[i] == NULL ) { |
120 SDL_OutOfMemory(); | |
121 return; | |
122 } | |
123 SDL_cdmode[i] = stbuf->st_rdev; | |
124 ++SDL_numcds; | |
125 #ifdef DEBUG_CDROM | |
126 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
127 #endif | |
128 } | |
129 } | |
130 | |
131 int SDL_SYS_CDInit(void) | |
132 { | |
133 static char *checklist[] = { | |
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134 #ifdef __OpenBSD__ |
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135 "?0 cd?c", "cdrom", NULL |
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136 #elif defined(__NetBSD__) |
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137 "?0 cd?d", "?0 cd?c", "cdrom", NULL |
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138 #else |
0 | 139 "?0 cd?c", "?0 acd?c", "cdrom", NULL |
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140 #endif |
0 | 141 }; |
142 char *SDLcdrom; | |
143 int i, j, exists; | |
144 char drive[32]; | |
145 struct stat stbuf; | |
146 | |
147 /* Fill in our driver capabilities */ | |
148 SDL_CDcaps.Name = SDL_SYS_CDName; | |
149 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
150 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
151 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
152 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
153 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
154 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
155 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
156 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
157 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
158 | |
159 /* Look in the environment for our CD-ROM drive list */ | |
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160 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
0 | 161 if ( SDLcdrom != NULL ) { |
162 char *cdpath, *delim; | |
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163 size_t len = SDL_strlen(SDLcdrom)+1; |
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164 cdpath = SDL_stack_alloc(char, len); |
0 | 165 if ( cdpath != NULL ) { |
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166 SDL_strlcpy(cdpath, SDLcdrom, len); |
0 | 167 SDLcdrom = cdpath; |
168 do { | |
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169 delim = SDL_strchr(SDLcdrom, ':'); |
0 | 170 if ( delim ) { |
171 *delim++ = '\0'; | |
172 } | |
173 if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) { | |
174 AddDrive(SDLcdrom, &stbuf); | |
175 } | |
176 if ( delim ) { | |
177 SDLcdrom = delim; | |
178 } else { | |
179 SDLcdrom = NULL; | |
180 } | |
181 } while ( SDLcdrom ); | |
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182 SDL_stack_free(cdpath); |
0 | 183 } |
184 | |
185 /* If we found our drives, there's nothing left to do */ | |
186 if ( SDL_numcds > 0 ) { | |
187 return(0); | |
188 } | |
189 } | |
190 | |
191 /* Scan the system for CD-ROM drives */ | |
192 for ( i=0; checklist[i]; ++i ) { | |
193 if ( checklist[i][0] == '?' ) { | |
194 char *insert; | |
195 exists = 1; | |
196 for ( j=checklist[i][1]; exists; ++j ) { | |
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197 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]); |
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198 insert = SDL_strchr(drive, '?'); |
0 | 199 if ( insert != NULL ) { |
200 *insert = j; | |
201 } | |
202 switch (CheckDrive(drive, &stbuf)) { | |
203 /* Drive exists and is a CD-ROM */ | |
204 case 1: | |
205 AddDrive(drive, &stbuf); | |
206 break; | |
207 /* Drive exists, but isn't a CD-ROM */ | |
208 case 0: | |
209 break; | |
210 /* Drive doesn't exist */ | |
211 case -1: | |
212 exists = 0; | |
213 break; | |
214 } | |
215 } | |
216 } else { | |
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217 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
0 | 218 if ( CheckDrive(drive, &stbuf) > 0 ) { |
219 AddDrive(drive, &stbuf); | |
220 } | |
221 } | |
222 } | |
223 return(0); | |
224 } | |
225 | |
226 /* General ioctl() CD-ROM command function */ | |
227 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
228 { | |
229 int retval; | |
230 | |
231 retval = ioctl(id, command, arg); | |
232 if ( retval < 0 ) { | |
233 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
234 } | |
235 return(retval); | |
236 } | |
237 | |
238 static const char *SDL_SYS_CDName(int drive) | |
239 { | |
240 return(SDL_cdlist[drive]); | |
241 } | |
242 | |
243 static int SDL_SYS_CDOpen(int drive) | |
244 { | |
245 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); | |
246 } | |
247 | |
248 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
249 { | |
250 struct ioc_toc_header toc; | |
251 int i, okay; | |
252 struct ioc_read_toc_entry entry; | |
253 struct cd_toc_entry data; | |
254 | |
255 okay = 0; | |
256 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { | |
257 cdrom->numtracks = toc.ending_track-toc.starting_track+1; | |
258 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
259 cdrom->numtracks = SDL_MAX_TRACKS; | |
260 } | |
261 /* Read all the track TOC entries */ | |
262 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
263 if ( i == cdrom->numtracks ) { | |
264 cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */ | |
265 } else { | |
266 cdrom->track[i].id = toc.starting_track+i; | |
267 } | |
268 entry.starting_track = cdrom->track[i].id; | |
269 entry.address_format = CD_MSF_FORMAT; | |
270 entry.data_len = sizeof(data); | |
271 entry.data = &data; | |
272 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, | |
273 &entry) < 0 ) { | |
274 break; | |
275 } else { | |
276 cdrom->track[i].type = data.control; | |
277 cdrom->track[i].offset = MSF_TO_FRAMES( | |
278 data.addr.msf.minute, | |
279 data.addr.msf.second, | |
280 data.addr.msf.frame); | |
281 cdrom->track[i].length = 0; | |
282 if ( i > 0 ) { | |
283 cdrom->track[i-1].length = | |
284 cdrom->track[i].offset- | |
285 cdrom->track[i-1].offset; | |
286 } | |
287 } | |
288 } | |
289 if ( i == (cdrom->numtracks+1) ) { | |
290 okay = 1; | |
291 } | |
292 } | |
293 return(okay ? 0 : -1); | |
294 } | |
295 | |
296 /* Get CD-ROM status */ | |
297 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
298 { | |
299 CDstatus status; | |
300 struct ioc_toc_header toc; | |
301 struct ioc_read_subchannel info; | |
302 struct cd_sub_channel_info data; | |
303 | |
304 info.address_format = CD_MSF_FORMAT; | |
305 info.data_format = CD_CURRENT_POSITION; | |
306 info.track = 0; | |
307 info.data_len = sizeof(data); | |
308 info.data = &data; | |
309 if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { | |
310 if ( ERRNO_TRAYEMPTY(errno) ) { | |
311 status = CD_TRAYEMPTY; | |
312 } else { | |
313 status = CD_ERROR; | |
314 } | |
315 } else { | |
316 switch (data.header.audio_status) { | |
317 case CD_AS_AUDIO_INVALID: | |
318 case CD_AS_NO_STATUS: | |
319 /* Try to determine if there's a CD available */ | |
320 if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) | |
321 status = CD_STOPPED; | |
322 else | |
323 status = CD_TRAYEMPTY; | |
324 break; | |
325 case CD_AS_PLAY_COMPLETED: | |
326 status = CD_STOPPED; | |
327 break; | |
328 case CD_AS_PLAY_IN_PROGRESS: | |
329 status = CD_PLAYING; | |
330 break; | |
331 case CD_AS_PLAY_PAUSED: | |
332 status = CD_PAUSED; | |
333 break; | |
334 default: | |
335 status = CD_ERROR; | |
336 break; | |
337 } | |
338 } | |
339 if ( position ) { | |
340 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
341 *position = MSF_TO_FRAMES( | |
342 data.what.position.absaddr.msf.minute, | |
343 data.what.position.absaddr.msf.second, | |
344 data.what.position.absaddr.msf.frame); | |
345 } else { | |
346 *position = 0; | |
347 } | |
348 } | |
349 return(status); | |
350 } | |
351 | |
352 /* Start play */ | |
353 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
354 { | |
355 struct ioc_play_msf playtime; | |
356 | |
357 FRAMES_TO_MSF(start, | |
358 &playtime.start_m, &playtime.start_s, &playtime.start_f); | |
359 FRAMES_TO_MSF(start+length, | |
360 &playtime.end_m, &playtime.end_s, &playtime.end_f); | |
361 #ifdef DEBUG_CDROM | |
362 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
363 playtime.start_m, playtime.start_s, playtime.start_f, | |
364 playtime.end_m, playtime.end_s, playtime.end_f); | |
365 #endif | |
366 ioctl(cdrom->id, CDIOCSTART, 0); | |
367 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); | |
368 } | |
369 | |
370 /* Pause play */ | |
371 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
372 { | |
373 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); | |
374 } | |
375 | |
376 /* Resume play */ | |
377 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
378 { | |
379 return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); | |
380 } | |
381 | |
382 /* Stop play */ | |
383 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
384 { | |
385 return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); | |
386 } | |
387 | |
388 /* Eject the CD-ROM */ | |
389 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
390 { | |
391 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); | |
392 } | |
393 | |
394 /* Close the CD-ROM handle */ | |
395 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
396 { | |
397 close(cdrom->id); | |
398 } | |
399 | |
400 void SDL_SYS_CDQuit(void) | |
401 { | |
402 int i; | |
403 | |
404 if ( SDL_numcds > 0 ) { | |
405 for ( i=0; i<SDL_numcds; ++i ) { | |
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406 SDL_free(SDL_cdlist[i]); |
0 | 407 } |
408 SDL_numcds = 0; | |
409 } | |
410 } | |
411 |