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// Copyright 2009 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
// Most of the code in this file was shamelessly ripped from libcdio With minor adjustments
#include "Common/CDUtils.h"
#include <algorithm>
#include <cstdlib>
#include <string>
#include <vector>
#include <fmt/format.h>
#ifdef _WIN32
#include <windows.h>
#elif __APPLE__
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/IOBSD.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/storage/IOCDMedia.h>
#include <IOKit/storage/IOMedia.h>
#include <paths.h>
#else
#include <climits>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <unistd.h>
#endif // WIN32
#ifdef __linux__
#include <linux/cdrom.h>
#endif
#include "Common/Common.h"
#include "Common/CommonTypes.h"
#include "Common/StringUtil.h"
namespace Common
{
#ifdef _WIN32
// takes a root drive path, returns true if it is a cdrom drive
static bool IsCDROM(const TCHAR* drive)
{
return (DRIVE_CDROM == GetDriveType(drive));
}
// Returns a vector with the device names
std::vector<std::string> GetCDDevices()
{
std::vector<std::string> drives;
const DWORD buffsize = GetLogicalDriveStrings(0, nullptr);
std::vector<TCHAR> buff(buffsize);
if (GetLogicalDriveStrings(buffsize, buff.data()) == buffsize - 1)
{
auto drive = buff.data();
while (*drive)
{
if (IsCDROM(drive))
{
std::string str(TStrToUTF8(drive));
str.pop_back(); // we don't want the final backslash
drives.push_back(std::move(str));
}
// advance to next drive
while (*drive++)
{
}
}
}
return drives;
}
#elif defined __APPLE__
// Returns a pointer to an array of strings with the device names
std::vector<std::string> GetCDDevices()
{
io_object_t next_media;
mach_port_t master_port;
kern_return_t kern_result;
io_iterator_t media_iterator;
CFMutableDictionaryRef classes_to_match;
std::vector<std::string> drives;
kern_result = IOMasterPort(MACH_PORT_NULL, &master_port);
if (kern_result != KERN_SUCCESS)
return drives;
classes_to_match = IOServiceMatching(kIOCDMediaClass);
if (classes_to_match == nullptr)
return drives;
CFDictionarySetValue(classes_to_match, CFSTR(kIOMediaEjectableKey), kCFBooleanTrue);
kern_result = IOServiceGetMatchingServices(master_port, classes_to_match, &media_iterator);
if (kern_result != KERN_SUCCESS)
return drives;
next_media = IOIteratorNext(media_iterator);
if (next_media != 0)
{
CFTypeRef str_bsd_path;
do
{
str_bsd_path =
IORegistryEntryCreateCFProperty(next_media, CFSTR(kIOBSDNameKey), kCFAllocatorDefault, 0);
if (str_bsd_path == nullptr)
{
IOObjectRelease(next_media);
continue;
}
if (CFGetTypeID(str_bsd_path) == CFStringGetTypeID())
{
size_t buf_size = CFStringGetLength((CFStringRef)str_bsd_path) * 4 + 1;
char* buf = new char[buf_size];
if (CFStringGetCString((CFStringRef)str_bsd_path, buf, buf_size, kCFStringEncodingUTF8))
{
// Below, by appending 'r' to the BSD node name, we indicate
// a raw disk. Raw disks receive I/O requests directly and
// don't go through a buffer cache.
drives.push_back(std::string(_PATH_DEV "r") + buf);
}
delete[] buf;
}
CFRelease(str_bsd_path);
IOObjectRelease(next_media);
} while ((next_media = IOIteratorNext(media_iterator)) != 0);
}
IOObjectRelease(media_iterator);
return drives;
}
#else
// checklist: /dev/cdrom, /dev/dvd /dev/hd?, /dev/scd? /dev/sr?
struct CheckListEntry
{
const char* format;
unsigned int num_min;
unsigned int num_max;
};
constexpr CheckListEntry checklist[] = {
#ifdef __linux__
{"/dev/cdrom", 0, 0}, {"/dev/dvd", 0, 0}, {"/dev/hd{}", 'a', 'z'},
{"/dev/scd{}", 0, 27}, {"/dev/sr{}", 0, 27},
#else
{"/dev/acd{}", 0, 27},
{"/dev/cd{}", 0, 27},
#endif
{nullptr, 0, 0},
};
// Returns true if a device is a block or char device and not a symbolic link
static bool IsDevice(const std::string& source_name)
{
struct stat buf;
if (0 != lstat(source_name.c_str(), &buf))
return false;
return ((S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode)) && !S_ISLNK(buf.st_mode));
}
// Check a device to see if it is a DVD/CD-ROM drive
static bool IsCDROM(const std::string& drive)
{
// Check if the device exists
if (!IsDevice(drive))
return false;
bool is_cd = false;
// If it does exist, verify that it is a cdrom/dvd drive
int cdfd = open(drive.c_str(), (O_RDONLY | O_NONBLOCK), 0);
if (cdfd >= 0)
{
#ifdef __linux__
if (ioctl(cdfd, CDROM_GET_CAPABILITY, 0) != -1)
#endif
is_cd = true;
close(cdfd);
}
return is_cd;
}
// Returns a pointer to an array of strings with the device names
std::vector<std::string> GetCDDevices()
{
std::vector<std::string> drives;
// Scan the system for DVD/CD-ROM drives.
for (unsigned int i = 0; checklist[i].format; ++i)
{
for (unsigned int j = checklist[i].num_min; j <= checklist[i].num_max; ++j)
{
std::string drive = fmt::format(checklist[i].format, j);
if (IsCDROM(drive))
{
drives.push_back(std::move(drive));
}
}
}
return drives;
}
#endif
// Returns true if device is a cdrom/dvd drive
bool IsCDROMDevice(std::string device)
{
#ifndef _WIN32
// Resolve symbolic links. This allows symbolic links to valid
// drives to be passed from the command line with the -e flag.
char resolved_path[PATH_MAX];
char* devname = realpath(device.c_str(), resolved_path);
if (!devname)
return false;
device = devname;
#endif
std::vector<std::string> devices = GetCDDevices();
for (const std::string& d : devices)
{
if (d == device)
return true;
}
return false;
}
} // namespace Common
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