mirror of
https://github.com/dolphin-emu/dolphin.git
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eb0cab140f
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2768 8ced0084-cf51-0410-be5f-012b33b47a6e
421 lines
10 KiB
C++
421 lines
10 KiB
C++
// Most of the code in this file was shamelessly ripped from libcdio With minor adjustments
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#include "CDUtils.h"
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#include "Common.h"
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// Follow symlinks until we have the real device file (idea taken from libunieject).
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void cdio_follow_symlink(const char * src, char * dst) {
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#ifndef _WIN32
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char tmp_src[PATH_MAX+1];
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char tmp_dst[PATH_MAX+1];
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int len;
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strcpy(tmp_src, src);
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while(1) {
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len = readlink(tmp_src, tmp_dst, PATH_MAX);
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if(len < 0) {
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strncpy(dst, tmp_src, PATH_MAX);
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return;
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}
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else {
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tmp_dst[len] = '\0';
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strncpy(tmp_src, tmp_dst, PATH_MAX);
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}
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}
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#else
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strncpy(dst, src, PATH_MAX);
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#endif
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}
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// Add/allocate a drive to the end of drives.
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// Use cdio_free_device_list() to free this device_list.
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void cdio_add_device_list(char **device_list[], const char *drive,
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unsigned int *num_drives) {
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if (NULL != drive) {
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unsigned int j;
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char real_device_1[PATH_MAX];
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char real_device_2[PATH_MAX];
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cdio_follow_symlink(drive, real_device_1);
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/* Check if drive is already in list. */
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for (j=0; j<*num_drives; j++) {
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cdio_follow_symlink((*device_list)[j], real_device_2);
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if (strcmp(real_device_1, real_device_2) == 0) break;
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}
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if (j==*num_drives) {
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/* Drive not in list. Add it. */
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(*num_drives)++;
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*device_list = (char **)realloc(*device_list, (*num_drives) * sizeof(char *));
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(*device_list)[*num_drives-1] = __strdup(drive);
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}
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} else {
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(*num_drives)++;
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if (*device_list) {
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*device_list = (char **)realloc(*device_list, (*num_drives) * sizeof(char *));
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} else {
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*device_list = (char **)malloc((*num_drives) * sizeof(char *));
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}
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(*device_list)[*num_drives-1] = NULL;
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}
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}
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// Free device list returned by cdio_get_devices or
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// cdio_get_devices_with_cap.
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void cdio_free_device_list(char * ppsz_device_list[]) {
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char **ppsz_device_list_save=ppsz_device_list;
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if (!ppsz_device_list) return;
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for ( ; NULL != *ppsz_device_list ; ppsz_device_list++ ) {
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free(*ppsz_device_list);
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*ppsz_device_list = NULL;
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}
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free(ppsz_device_list_save);
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}
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#ifdef _WIN32
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// Returns a string that can be used in a CreateFile call if
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// c_drive letter is a character. If not NULL is returned.
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const char *is_cdrom_win32(const char c_drive_letter) {
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UINT uDriveType;
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char sz_win32_drive[4];
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sz_win32_drive[0]= c_drive_letter;
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sz_win32_drive[1]=':';
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sz_win32_drive[2]='\\';
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sz_win32_drive[3]='\0';
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uDriveType = GetDriveType(sz_win32_drive);
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switch(uDriveType) {
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case DRIVE_CDROM: {
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char sz_win32_drive_full[] = "\\\\.\\X:";
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sz_win32_drive_full[4] = c_drive_letter;
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return __strdup(&sz_win32_drive_full[4]);
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}
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default:
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//cdio_debug("Drive %c is not a CD-ROM", c_drive_letter);
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return NULL;
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}
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}
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// Returns a pointer to an array of strings with the device names
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char ** cdio_get_devices_win32() {
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char **drives = NULL;
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unsigned int num_drives=0;
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char drive_letter;
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// Scan the system for CD-ROM drives.
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// Not always 100% reliable, so use the USE_MNTENT code above first.
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for (drive_letter='A'; drive_letter <= 'Z'; drive_letter++) {
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const char *drive_str=is_cdrom_win32(drive_letter);
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if (drive_str != NULL) {
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cdio_add_device_list(&drives, drive_str, &num_drives);
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}
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}
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cdio_add_device_list(&drives, NULL, &num_drives);
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return drives;
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}
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#endif // WIN32
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#ifdef __APPLE__
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/*
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Returns a pointer to an array of strings with the device names
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*/
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char **cdio_get_devices_osx(void) {
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io_object_t next_media;
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mach_port_t master_port;
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kern_return_t kern_result;
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io_iterator_t media_iterator;
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CFMutableDictionaryRef classes_to_match;
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char **drives = NULL;
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unsigned int num_drives=0;
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kern_result = IOMasterPort( MACH_PORT_NULL, &master_port );
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if( kern_result != KERN_SUCCESS ) {
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return( NULL );
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}
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classes_to_match = IOServiceMatching( kIOCDMediaClass );
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if( classes_to_match == NULL ) {
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return( NULL );
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}
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CFDictionarySetValue( classes_to_match, CFSTR(kIOMediaEjectableKey),
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kCFBooleanTrue );
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kern_result = IOServiceGetMatchingServices( master_port,
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classes_to_match,
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&media_iterator );
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if( kern_result != KERN_SUCCESS) {
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return( NULL );
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}
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next_media = IOIteratorNext( media_iterator );
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if( next_media != 0 ) {
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char psz_buf[0x32];
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size_t dev_path_length;
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CFTypeRef str_bsd_path;
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do {
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str_bsd_path =
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IORegistryEntryCreateCFProperty( next_media,
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CFSTR( kIOBSDNameKey ),
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kCFAllocatorDefault,
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0 );
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if( str_bsd_path == NULL ) {
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IOObjectRelease( next_media );
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continue;
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}
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/* Below, by appending 'r' to the BSD node name, we indicate
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a raw disk. Raw disks receive I/O requests directly and
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don't go through a buffer cache. */
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snprintf( psz_buf, sizeof(psz_buf), "%s%c", _PATH_DEV, 'r' );
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dev_path_length = strlen( psz_buf );
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if( CFStringGetCString( (CFStringRef)str_bsd_path,
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(char*)&psz_buf + dev_path_length,
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sizeof(psz_buf) - dev_path_length,
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kCFStringEncodingASCII)) {
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cdio_add_device_list(&drives, strdup(psz_buf), &num_drives);
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}
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CFRelease( str_bsd_path );
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IOObjectRelease( next_media );
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} while( ( next_media = IOIteratorNext( media_iterator ) ) != 0 );
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}
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IOObjectRelease( media_iterator );
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cdio_add_device_list(&drives, NULL, &num_drives);
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return drives;
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}
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#endif
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#ifdef __linux__
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/* checklist: /dev/cdrom, /dev/dvd /dev/hd?, /dev/scd? /dev/sr? */
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static char checklist1[][40] = {
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{"cdrom"}, {"dvd"}, {""}
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};
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static struct
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{
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const char * format;
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unsigned int num_min;
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unsigned int num_max;
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} checklist2[] =
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{
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{ "/dev/hd%c", 'a', 'z' },
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{ "/dev/scd%d", 0, 27 },
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{ "/dev/sr%d", 0, 27 },
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{ /* End of array */ }
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};
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/*
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Returns true if a device is a block or char device
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*/
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bool cdio_is_device_quiet_generic(const char *source_name) {
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struct stat buf;
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if (0 != stat(source_name, &buf)) {
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return false;
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}
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return (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode));
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}
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/*
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Check a drive to see if it is a CD-ROM
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Return 1 if a CD-ROM. 0 if it exists but isn't a CD-ROM drive
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and -1 if no device exists .
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*/
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static bool is_cdrom_linux(const char *drive, char *mnttype) {
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bool is_cd=false;
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int cdfd;
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/* If it doesn't exist, return -1 */
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if ( !cdio_is_device_quiet_generic(drive) ) {
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return(false);
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}
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/* If it does exist, verify that it's an available CD-ROM */
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cdfd = open(drive, (O_RDONLY|O_NONBLOCK), 0);
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if ( cdfd >= 0 ) {
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if ( ioctl(cdfd, CDROM_GET_CAPABILITY, 0) != -1 ) {
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is_cd = true;
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}
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close(cdfd);
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}
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/* Even if we can't read it, it might be mounted */
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else if ( mnttype && (strcmp(mnttype, "iso9660") == 0) ) {
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is_cd = true;
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}
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return(is_cd);
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}
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/*
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Recive an mtab formated file and returns path to cdrom device
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*/
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static char *check_mounts_linux(const char *mtab)
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{
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FILE *mntfp;
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struct mntent *mntent;
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mntfp = setmntent(mtab, "r");
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if ( mntfp != NULL ) {
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char *tmp;
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char *mnt_type;
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char *mnt_dev;
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unsigned int i_mnt_type;
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unsigned int i_mnt_dev;
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while ( (mntent=getmntent(mntfp)) != NULL ) {
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i_mnt_type = strlen(mntent->mnt_type) + 1;
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mnt_type = (char *)calloc(1, i_mnt_type);
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if (mnt_type == NULL)
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continue; /* maybe you'll get lucky next time. */
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i_mnt_dev = strlen(mntent->mnt_fsname) + 1;
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mnt_dev = (char *)calloc(1, i_mnt_dev);
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if (mnt_dev == NULL) {
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free(mnt_type);
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continue;
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}
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strncpy(mnt_type, mntent->mnt_type, i_mnt_type);
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strncpy(mnt_dev, mntent->mnt_fsname, i_mnt_dev);
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/* Handle "supermount" filesystem mounts */
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if ( strcmp(mnt_type, "supermount") == 0 ) {
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tmp = strstr(mntent->mnt_opts, "fs=");
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if ( tmp ) {
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free(mnt_type);
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mnt_type = __strdup(tmp + strlen("fs="));
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if ( mnt_type ) {
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tmp = strchr(mnt_type, ',');
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if ( tmp ) {
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*tmp = '\0';
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}
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}
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}
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tmp = strstr(mntent->mnt_opts, "dev=");
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if ( tmp ) {
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free(mnt_dev);
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mnt_dev = __strdup(tmp + strlen("dev="));
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if ( mnt_dev ) {
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tmp = strchr(mnt_dev, ',');
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if ( tmp ) {
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*tmp = '\0';
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}
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}
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}
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}
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if ( strcmp(mnt_type, "iso9660") == 0 ) {
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if (is_cdrom_linux(mnt_dev, mnt_type) > 0) {
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free(mnt_type);
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endmntent(mntfp);
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return mnt_dev;
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}
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}
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free(mnt_dev);
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free(mnt_type);
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}
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endmntent(mntfp);
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}
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return NULL;
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}
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// Returns a pointer to an array of strings with the device names
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char **cdio_get_devices_linux () {
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unsigned int i;
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char drive[40];
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char *ret_drive;
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char **drives = NULL;
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unsigned int num_drives=0;
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// Scan the system for CD-ROM drives.
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for ( i=0; strlen(checklist1[i]) > 0; ++i ) {
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sprintf(drive, "/dev/%s", checklist1[i]);
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if ( is_cdrom_linux(drive, NULL) > 0 ) {
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cdio_add_device_list(&drives, drive, &num_drives);
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}
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}
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/* Now check the currently mounted CD drives */
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if (NULL != (ret_drive = check_mounts_linux("/etc/mtab"))) {
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cdio_add_device_list(&drives, ret_drive, &num_drives);
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free(ret_drive);
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}
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/* Finally check possible mountable drives in /etc/fstab */
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if (NULL != (ret_drive = check_mounts_linux("/etc/fstab"))) {
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cdio_add_device_list(&drives, ret_drive, &num_drives);
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free(ret_drive);
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}
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// Scan the system for CD-ROM drives.
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// Not always 100% reliable, so use the USE_MNTENT code above first.
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for ( i=0; checklist2[i].format; ++i ) {
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unsigned int j;
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for ( j=checklist2[i].num_min; j<=checklist2[i].num_max; ++j ) {
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sprintf(drive, checklist2[i].format, j);
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if ( (is_cdrom_linux(drive, NULL)) > 0 ) {
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cdio_add_device_list(&drives, drive, &num_drives);
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}
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}
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}
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cdio_add_device_list(&drives, NULL, &num_drives);
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return drives;
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}
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#endif
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// Returns a pointer to an array of strings with the device names
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char **cdio_get_devices() {
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#ifdef _WIN32
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return cdio_get_devices_win32();
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#elif __APPLE__
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return cdio_get_devices_osx();
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#elif __linux__
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return cdio_get_devices_linux();
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#else
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// todo add somewarning
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#endif
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}
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// Need to be tested, does calling this function twice cause any damage?
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// Returns true if device is cdrom/dvd
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bool cdio_is_cdrom(const char *device) {
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char **devices = cdio_get_devices();
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bool res = false;
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for (int i = 0; devices[i] != NULL; i++) {
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if (strncmp(devices[i], device, PATH_MAX) == 0) {
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res = true;
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break;
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}
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}
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cdio_free_device_list(devices);
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return res;
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}
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// Can we remove this?
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/*
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int main() {
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char** res = cdio_get_devices();
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int i = 0;
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for (i = 0; res[i] != NULL; i++) {
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printf("%s\n", res[i]);
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}
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cdio_free_device_list(res);
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return 0;
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}
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*/
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