annotate src/cdrom/linux/SDL_syscdrom.c @ 1051:091350827e08

SDL_CDOpen() fails on Linux if data track on disc is mounted in the filesystem. Removing O_EXCL from open() call fixes this. Problem and solution noted by "Fosters": http://www.libsdl.org/pipermail/sdl/2005-March/068028.html
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 17 Apr 2005 10:36:03 +0000
parents 0e6627072f7a
children 3e637850c02b
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* Functions for system-level CD-ROM audio control */
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29
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30 #include <sys/types.h>
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31 #include <stdlib.h>
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32 #include <sys/stat.h>
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33 #include <sys/ioctl.h>
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34 #include <fcntl.h>
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35 #include <stdio.h>
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36 #include <string.h>
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37 #include <errno.h>
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38 #include <unistd.h>
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39 #ifdef __linux__
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40 /* linux 2.6.9 workaround */
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41 #include <linux/version.h>
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42 #if LINUX_VERSION_CODE == KERNEL_VERSION(2,6,9)
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43 #include <asm/types.h>
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44 #define __le64 __u64
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45 #define __le32 __u32
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46 #define __le16 __u16
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47 #define __be64 __u64
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48 #define __be32 __u32
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49 #define __be16 __u16
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50 #endif /* linux 2.6.9 workaround */
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51 #include <linux/cdrom.h>
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52 #endif
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53 #ifdef __SVR4
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54 #include <sys/cdio.h>
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55 #endif
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56
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57 /* Define this to use the alternative getmntent() code */
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58 #ifndef __SVR4
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59 #define USE_MNTENT
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60 #endif
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61
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62 #ifdef USE_MNTENT
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63 #if defined(__USLC__)
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64 #include <sys/mntent.h>
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65 #else
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66 #include <mntent.h>
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67 #endif
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68
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69 #ifndef _PATH_MNTTAB
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70 #ifdef MNTTAB
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71 #define _PATH_MNTTAB MNTTAB
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72 #else
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73 #define _PATH_MNTTAB "/etc/fstab"
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74 #endif
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75 #endif /* !_PATH_MNTTAB */
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76
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77 #ifndef _PATH_MOUNTED
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78 #define _PATH_MOUNTED "/etc/mtab"
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79 #endif /* !_PATH_MOUNTED */
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80
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81 #ifndef MNTTYPE_CDROM
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82 #define MNTTYPE_CDROM "iso9660"
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83 #endif
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84 #ifndef MNTTYPE_SUPER
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85 #define MNTTYPE_SUPER "supermount"
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86 #endif
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87 #endif /* USE_MNTENT */
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88
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89 #include "SDL_error.h"
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90 #include "SDL_cdrom.h"
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91 #include "SDL_syscdrom.h"
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92
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93
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94 /* The maximum number of CD-ROM drives we'll detect */
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95 #define MAX_DRIVES 16
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96
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97 /* A list of available CD-ROM drives */
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98 static char *SDL_cdlist[MAX_DRIVES];
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99 static dev_t SDL_cdmode[MAX_DRIVES];
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100
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101 /* The system-dependent CD control functions */
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102 static const char *SDL_SYS_CDName(int drive);
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103 static int SDL_SYS_CDOpen(int drive);
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104 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
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105 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
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106 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
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107 static int SDL_SYS_CDPause(SDL_CD *cdrom);
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108 static int SDL_SYS_CDResume(SDL_CD *cdrom);
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109 static int SDL_SYS_CDStop(SDL_CD *cdrom);
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110 static int SDL_SYS_CDEject(SDL_CD *cdrom);
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111 static void SDL_SYS_CDClose(SDL_CD *cdrom);
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112
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113 /* Some ioctl() errno values which occur when the tray is empty */
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114 #ifndef ENOMEDIUM
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115 #define ENOMEDIUM ENOENT
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116 #endif
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117 #define ERRNO_TRAYEMPTY(errno) \
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118 ((errno == EIO) || (errno == ENOENT) || \
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119 (errno == EINVAL) || (errno == ENOMEDIUM))
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120
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121 /* Check a drive to see if it is a CD-ROM */
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122 static int CheckDrive(char *drive, char *mnttype, struct stat *stbuf)
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123 {
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124 int is_cd, cdfd;
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125 struct cdrom_subchnl info;
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126
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127 /* If it doesn't exist, return -1 */
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128 if ( stat(drive, stbuf) < 0 ) {
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129 return(-1);
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130 }
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131
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132 /* If it does exist, verify that it's an available CD-ROM */
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133 is_cd = 0;
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134 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) {
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135 cdfd = open(drive, (O_RDONLY|O_NONBLOCK), 0);
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136 if ( cdfd >= 0 ) {
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137 info.cdsc_format = CDROM_MSF;
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138 /* Under Linux, EIO occurs when a disk is not present.
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139 */
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140 if ( (ioctl(cdfd, CDROMSUBCHNL, &info) == 0) ||
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141 ERRNO_TRAYEMPTY(errno) ) {
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142 is_cd = 1;
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143 }
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144 close(cdfd);
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145 }
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146 #ifdef USE_MNTENT
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147 /* Even if we can't read it, it might be mounted */
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148 else if ( mnttype && (strcmp(mnttype, MNTTYPE_CDROM) == 0) ) {
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149 is_cd = 1;
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150 }
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151 #endif
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152 }
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153 return(is_cd);
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154 }
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155
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156 /* Add a CD-ROM drive to our list of valid drives */
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157 static void AddDrive(char *drive, struct stat *stbuf)
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158 {
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159 int i;
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160
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161 if ( SDL_numcds < MAX_DRIVES ) {
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162 /* Check to make sure it's not already in our list.
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163 This can happen when we see a drive via symbolic link.
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164 */
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165 for ( i=0; i<SDL_numcds; ++i ) {
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166 if ( stbuf->st_rdev == SDL_cdmode[i] ) {
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167 #ifdef DEBUG_CDROM
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168 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]);
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169 #endif
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170 return;
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171 }
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172 }
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173
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174 /* Add this drive to our list */
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175 i = SDL_numcds;
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176 SDL_cdlist[i] = (char *)malloc(strlen(drive)+1);
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177 if ( SDL_cdlist[i] == NULL ) {
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178 SDL_OutOfMemory();
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179 return;
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180 }
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181 strcpy(SDL_cdlist[i], drive);
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182 SDL_cdmode[i] = stbuf->st_rdev;
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183 ++SDL_numcds;
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184 #ifdef DEBUG_CDROM
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185 fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
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186 #endif
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187 }
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188 }
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189
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190 #ifdef USE_MNTENT
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191 static void CheckMounts(const char *mtab)
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192 {
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193 FILE *mntfp;
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194 struct mntent *mntent;
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195 struct stat stbuf;
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196
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197 mntfp = setmntent(mtab, "r");
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198 if ( mntfp != NULL ) {
139
ef23a1bf1244 Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
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199 char *tmp;
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200 char *mnt_type;
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201 char *mnt_dev;
0
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202
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203 while ( (mntent=getmntent(mntfp)) != NULL ) {
139
ef23a1bf1244 Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
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204 mnt_type = malloc(strlen(mntent->mnt_type) + 1);
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205 if (mnt_type == NULL)
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206 continue; /* maybe you'll get lucky next time. */
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207
ef23a1bf1244 Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
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208 mnt_dev = malloc(strlen(mntent->mnt_fsname) + 1);
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209 if (mnt_dev == NULL) {
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210 free(mnt_type);
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211 continue;
ef23a1bf1244 Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
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212 }
ef23a1bf1244 Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
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213
0
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214 strcpy(mnt_type, mntent->mnt_type);
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215 strcpy(mnt_dev, mntent->mnt_fsname);
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diff changeset
216
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217 /* Handle "supermount" filesystem mounts */
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218 if ( strcmp(mnt_type, MNTTYPE_SUPER) == 0 ) {
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219 tmp = strstr(mntent->mnt_opts, "fs=");
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220 if ( tmp ) {
247
b0f09f86378d Fix crash with Linux supermount fstab entries (thanks Erno!)
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diff changeset
221 free(mnt_type);
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diff changeset
222 mnt_type = strdup(tmp + strlen("fs="));
b0f09f86378d Fix crash with Linux supermount fstab entries (thanks Erno!)
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parents: 139
diff changeset
223 if ( mnt_type ) {
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parents: 139
diff changeset
224 tmp = strchr(mnt_type, ',');
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parents: 139
diff changeset
225 if ( tmp ) {
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parents: 139
diff changeset
226 *tmp = '\0';
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diff changeset
227 }
0
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228 }
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229 }
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230 tmp = strstr(mntent->mnt_opts, "dev=");
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231 if ( tmp ) {
247
b0f09f86378d Fix crash with Linux supermount fstab entries (thanks Erno!)
Sam Lantinga <slouken@libsdl.org>
parents: 139
diff changeset
232 free(mnt_dev);
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diff changeset
233 mnt_dev = strdup(tmp + strlen("dev="));
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parents: 139
diff changeset
234 if ( mnt_dev ) {
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Sam Lantinga <slouken@libsdl.org>
parents: 139
diff changeset
235 tmp = strchr(mnt_dev, ',');
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parents: 139
diff changeset
236 if ( tmp ) {
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
237 *tmp = '\0';
b0f09f86378d Fix crash with Linux supermount fstab entries (thanks Erno!)
Sam Lantinga <slouken@libsdl.org>
parents: 139
diff changeset
238 }
0
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239 }
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240 }
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241 }
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diff changeset
242 if ( strcmp(mnt_type, MNTTYPE_CDROM) == 0 ) {
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243 #ifdef DEBUG_CDROM
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244 fprintf(stderr, "Checking mount path from %s: %s mounted on %s of %s\n",
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245 mtab, mnt_dev, mntent->mnt_dir, mnt_type);
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diff changeset
246 #endif
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247 if (CheckDrive(mnt_dev, mnt_type, &stbuf) > 0) {
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diff changeset
248 AddDrive(mnt_dev, &stbuf);
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249 }
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diff changeset
250 }
139
ef23a1bf1244 Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
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parents: 0
diff changeset
251 free(mnt_dev);
ef23a1bf1244 Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
252 free(mnt_type);
0
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parents:
diff changeset
253 }
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diff changeset
254 endmntent(mntfp);
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parents:
diff changeset
255 }
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parents:
diff changeset
256 }
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diff changeset
257 #endif /* USE_MNTENT */
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diff changeset
258
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diff changeset
259 int SDL_SYS_CDInit(void)
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parents:
diff changeset
260 {
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parents:
diff changeset
261 /* checklist: /dev/cdrom, /dev/hd?, /dev/scd? /dev/sr? */
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parents:
diff changeset
262 static char *checklist[] = {
74212992fb08 Initial revision
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parents:
diff changeset
263 "cdrom", "?a hd?", "?0 scd?", "?0 sr?", NULL
74212992fb08 Initial revision
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parents:
diff changeset
264 };
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diff changeset
265 char *SDLcdrom;
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diff changeset
266 int i, j, exists;
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parents:
diff changeset
267 char drive[32];
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parents:
diff changeset
268 struct stat stbuf;
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diff changeset
269
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diff changeset
270 /* Fill in our driver capabilities */
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parents:
diff changeset
271 SDL_CDcaps.Name = SDL_SYS_CDName;
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diff changeset
272 SDL_CDcaps.Open = SDL_SYS_CDOpen;
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diff changeset
273 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
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parents:
diff changeset
274 SDL_CDcaps.Status = SDL_SYS_CDStatus;
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parents:
diff changeset
275 SDL_CDcaps.Play = SDL_SYS_CDPlay;
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diff changeset
276 SDL_CDcaps.Pause = SDL_SYS_CDPause;
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parents:
diff changeset
277 SDL_CDcaps.Resume = SDL_SYS_CDResume;
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diff changeset
278 SDL_CDcaps.Stop = SDL_SYS_CDStop;
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diff changeset
279 SDL_CDcaps.Eject = SDL_SYS_CDEject;
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diff changeset
280 SDL_CDcaps.Close = SDL_SYS_CDClose;
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parents:
diff changeset
281
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parents:
diff changeset
282 /* Look in the environment for our CD-ROM drive list */
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parents:
diff changeset
283 SDLcdrom = getenv("SDL_CDROM"); /* ':' separated list of devices */
74212992fb08 Initial revision
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parents:
diff changeset
284 if ( SDLcdrom != NULL ) {
74212992fb08 Initial revision
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parents:
diff changeset
285 char *cdpath, *delim;
74212992fb08 Initial revision
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parents:
diff changeset
286 cdpath = malloc(strlen(SDLcdrom)+1);
74212992fb08 Initial revision
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parents:
diff changeset
287 if ( cdpath != NULL ) {
74212992fb08 Initial revision
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parents:
diff changeset
288 strcpy(cdpath, SDLcdrom);
74212992fb08 Initial revision
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parents:
diff changeset
289 SDLcdrom = cdpath;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 do {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 delim = strchr(SDLcdrom, ':');
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 if ( delim ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 *delim++ = '\0';
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 }
74212992fb08 Initial revision
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parents:
diff changeset
295 #ifdef DEBUG_CDROM
74212992fb08 Initial revision
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parents:
diff changeset
296 fprintf(stderr, "Checking CD-ROM drive from SDL_CDROM: %s\n", SDLcdrom);
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parents:
diff changeset
297 #endif
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parents:
diff changeset
298 if ( CheckDrive(SDLcdrom, NULL, &stbuf) > 0 ) {
74212992fb08 Initial revision
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parents:
diff changeset
299 AddDrive(SDLcdrom, &stbuf);
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parents:
diff changeset
300 }
74212992fb08 Initial revision
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parents:
diff changeset
301 if ( delim ) {
74212992fb08 Initial revision
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parents:
diff changeset
302 SDLcdrom = delim;
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parents:
diff changeset
303 } else {
74212992fb08 Initial revision
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parents:
diff changeset
304 SDLcdrom = NULL;
74212992fb08 Initial revision
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parents:
diff changeset
305 }
74212992fb08 Initial revision
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parents:
diff changeset
306 } while ( SDLcdrom );
74212992fb08 Initial revision
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parents:
diff changeset
307 free(cdpath);
74212992fb08 Initial revision
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parents:
diff changeset
308 }
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parents:
diff changeset
309
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parents:
diff changeset
310 /* If we found our drives, there's nothing left to do */
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parents:
diff changeset
311 if ( SDL_numcds > 0 ) {
74212992fb08 Initial revision
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parents:
diff changeset
312 return(0);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 }
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parents:
diff changeset
314 }
74212992fb08 Initial revision
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parents:
diff changeset
315
74212992fb08 Initial revision
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parents:
diff changeset
316 #ifdef USE_MNTENT
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parents:
diff changeset
317 /* Check /dev/cdrom first :-) */
74212992fb08 Initial revision
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parents:
diff changeset
318 if (CheckDrive("/dev/cdrom", NULL, &stbuf) > 0) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 AddDrive("/dev/cdrom", &stbuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 /* Now check the currently mounted CD drives */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 CheckMounts(_PATH_MOUNTED);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 /* Finally check possible mountable drives in /etc/fstab */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 CheckMounts(_PATH_MNTTAB);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 /* If we found our drives, there's nothing left to do */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 if ( SDL_numcds > 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 #endif /* USE_MNTENT */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 /* Scan the system for CD-ROM drives.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 Not always 100% reliable, so use the USE_MNTENT code above first.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 for ( i=0; checklist[i]; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 if ( checklist[i][0] == '?' ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 char *insert;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 exists = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 for ( j=checklist[i][1]; exists; ++j ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 sprintf(drive, "/dev/%s", &checklist[i][3]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 insert = strchr(drive, '?');
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 if ( insert != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 *insert = j;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 #ifdef DEBUG_CDROM
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348 fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 switch (CheckDrive(drive, NULL, &stbuf)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 /* Drive exists and is a CD-ROM */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
352 case 1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 AddDrive(drive, &stbuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 /* Drive exists, but isn't a CD-ROM */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356 case 0:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358 /* Drive doesn't exist */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 case -1:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 exists = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 sprintf(drive, "/dev/%s", checklist[i]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 #ifdef DEBUG_CDROM
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
367 fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 if ( CheckDrive(drive, NULL, &stbuf) > 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370 AddDrive(drive, &stbuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
377 /* General ioctl() CD-ROM command function */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
378 static int SDL_SYS_CDioctl(int id, int command, void *arg)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380 int retval;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
381
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
382 retval = ioctl(id, command, arg);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
383 if ( retval < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 SDL_SetError("ioctl() error: %s", strerror(errno));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
386 return(retval);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
389 static const char *SDL_SYS_CDName(int drive)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
390 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391 return(SDL_cdlist[drive]);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 static int SDL_SYS_CDOpen(int drive)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 {
1051
091350827e08 SDL_CDOpen() fails on Linux if data track on disc is mounted in the
Ryan C. Gordon <icculus@icculus.org>
parents: 998
diff changeset
396 return(open(SDL_cdlist[drive], (O_RDONLY|O_NONBLOCK), 0));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
397 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
398
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
399 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 struct cdrom_tochdr toc;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 int i, okay;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 struct cdrom_tocentry entry;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 okay = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc) == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 cdrom->numtracks = SDL_MAX_TRACKS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 /* Read all the track TOC entries */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 for ( i=0; i<=cdrom->numtracks; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 if ( i == cdrom->numtracks ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 cdrom->track[i].id = CDROM_LEADOUT;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 cdrom->track[i].id = toc.cdth_trk0+i;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 entry.cdte_track = cdrom->track[i].id;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 entry.cdte_format = CDROM_MSF;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 &entry) < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 cdrom->track[i].type = SDL_DATA_TRACK;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 cdrom->track[i].type = SDL_AUDIO_TRACK;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 cdrom->track[i].offset = MSF_TO_FRAMES(
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 entry.cdte_addr.msf.minute,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 entry.cdte_addr.msf.second,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 entry.cdte_addr.msf.frame);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 cdrom->track[i].length = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434 if ( i > 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 cdrom->track[i-1].length =
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 cdrom->track[i].offset-
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 cdrom->track[i-1].offset;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 if ( i == (cdrom->numtracks+1) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 okay = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 return(okay ? 0 : -1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 /* Get CD-ROM status */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 CDstatus status;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 struct cdrom_tochdr toc;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 struct cdrom_subchnl info;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 info.cdsc_format = CDROM_MSF;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 if ( ioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 if ( ERRNO_TRAYEMPTY(errno) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 status = CD_TRAYEMPTY;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460 status = CD_ERROR;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 switch (info.cdsc_audiostatus) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 case CDROM_AUDIO_INVALID:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 case CDROM_AUDIO_NO_STATUS:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 /* Try to determine if there's a CD available */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 if (ioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 status = CD_STOPPED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 status = CD_TRAYEMPTY;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 case CDROM_AUDIO_COMPLETED:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 status = CD_STOPPED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 case CDROM_AUDIO_PLAY:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 status = CD_PLAYING;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478 case CDROM_AUDIO_PAUSED:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 /* Workaround buggy CD-ROM drive */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 if ( info.cdsc_trk == CDROM_LEADOUT ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 status = CD_STOPPED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 status = CD_PAUSED;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 status = CD_ERROR;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 if ( position ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
74212992fb08 Initial revision
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493 *position = MSF_TO_FRAMES(
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494 info.cdsc_absaddr.msf.minute,
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495 info.cdsc_absaddr.msf.second,
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496 info.cdsc_absaddr.msf.frame);
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497 } else {
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498 *position = 0;
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499 }
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500 }
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501 return(status);
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502 }
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503
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504 /* Start play */
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505 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
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506 {
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507 struct cdrom_msf playtime;
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508
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509 FRAMES_TO_MSF(start,
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510 &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0);
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511 FRAMES_TO_MSF(start+length,
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512 &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1);
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513 #ifdef DEBUG_CDROM
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514 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n",
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515 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0,
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516 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1);
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517 #endif
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518 return(SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime));
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519 }
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parents:
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520
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parents:
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521 /* Pause play */
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522 static int SDL_SYS_CDPause(SDL_CD *cdrom)
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523 {
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524 return(SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0));
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parents:
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525 }
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parents:
diff changeset
526
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parents:
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527 /* Resume play */
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parents:
diff changeset
528 static int SDL_SYS_CDResume(SDL_CD *cdrom)
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parents:
diff changeset
529 {
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parents:
diff changeset
530 return(SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0));
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parents:
diff changeset
531 }
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parents:
diff changeset
532
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parents:
diff changeset
533 /* Stop play */
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parents:
diff changeset
534 static int SDL_SYS_CDStop(SDL_CD *cdrom)
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parents:
diff changeset
535 {
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parents:
diff changeset
536 return(SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0));
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parents:
diff changeset
537 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
538
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
539 /* Eject the CD-ROM */
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parents:
diff changeset
540 static int SDL_SYS_CDEject(SDL_CD *cdrom)
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parents:
diff changeset
541 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 return(SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0));
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parents:
diff changeset
543 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
545 /* Close the CD-ROM handle */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546 static void SDL_SYS_CDClose(SDL_CD *cdrom)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
547 {
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parents:
diff changeset
548 close(cdrom->id);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
549 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
550
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parents:
diff changeset
551 void SDL_SYS_CDQuit(void)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
552 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
553 int i;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
554
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parents:
diff changeset
555 if ( SDL_numcds > 0 ) {
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parents:
diff changeset
556 for ( i=0; i<SDL_numcds; ++i ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
557 free(SDL_cdlist[i]);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
558 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
559 SDL_numcds = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
560 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
561 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562