void *Sys_open(const char *name, bool read_only)
{
static bool published_all = false;
bool is_file = (strstr(name, "/dev/") != name);
D(bug("Sys_open(%s, %s)\n", name, read_only ? "read-only" : "read/write"));
// Print warning message and eventually unmount drive when this is an HFS volume mounted under BeOS (double mounting will corrupt the volume)
char mount_name[B_FILE_NAME_LENGTH];
if (!is_file && !read_only && is_drive_mounted(name, mount_name)) {
char str[256 + B_FILE_NAME_LENGTH];
sprintf(str, GetString(STR_VOLUME_IS_MOUNTED_WARN), mount_name);
WarningAlert(str);
#warning TODO: unmount disk!
#if 0
if (unmount(mount_name) != 0) {
sprintf(str, GetString(STR_CANNOT_UNMOUNT_WARN), mount_name);
WarningAlert(str);
return NULL;
}
#endif
}
int fd = open(name, read_only ? O_RDONLY : O_RDWR);
if (fd < 0 && !published_all) {
// Open failed, create all device nodes and try again, but only the first time
system("mountvolume -publishall");
published_all = true;
fd = open(name, read_only ? O_RDONLY : O_RDWR);
}
if (fd >= 0) {
file_handle *fh = new file_handle;
fh->name = strdup(name);
fh->fd = fd;
fh->is_file = is_file;
fh->read_only = read_only;
fh->start_byte = 0;
if (fh->is_file) {
// Detect disk image file layout
loff_t size = lseek(fd, 0, SEEK_END);
uint8 data[256];
lseek(fd, 0, SEEK_SET);
read(fd, data, 256);
FileDiskLayout(size, data, fh->start_byte, fh->file_size);
}
// Enqueue file handle
fh->next = NULL;
file_handle *q = first_file_handle;
if (q) {
while (q->next)
q = q->next;
q->next = fh;
} else
first_file_handle = fh;
return fh;
} else
return NULL;
}
void *Sys_open(const char *name, bool read_only)
{
bool is_file = strncmp(name, "/dev/", 5) != 0;
#if defined(__FreeBSD__)
// SCSI IDE
bool is_cdrom = strncmp(name, "/dev/cd", 7) == 0 || strncmp(name, "/dev/acd", 8) == 0;
#else
bool is_cdrom = strncmp(name, "/dev/cd", 7) == 0;
#endif
bool is_floppy = strncmp(name, "/dev/fd", 7) == 0;
bool is_polled_media = strncmp(name, "/dev/poll/", 10) == 0;
if (is_floppy) // Floppy open fails if there's no disk inserted
is_polled_media = true;
#if defined __MACOSX__
// There is no set filename in /dev which is the cdrom,
// so we have to see if it is any of the devices that we found earlier
{
int index = 0;
const char *str;
while ((str = PrefsFindString("cdrom", index++)) != NULL) {
if (is_polled_media || strcmp(str, name) == 0) {
is_cdrom = true;
read_only = true;
break;
}
}
}
#endif
D(bug("Sys_open(%s, %s)\n", name, read_only ? "read-only" : "read/write"));
// Check if write access is allowed, set read-only flag if not
if (!read_only && access(name, W_OK))
read_only = true;
// Print warning message and eventually unmount drive when this is an HFS volume mounted under Linux (double mounting will corrupt the volume)
char mount_name[256];
if (!is_file && !read_only && is_drive_mounted(name, mount_name)) {
char str[512];
sprintf(str, GetString(STR_VOLUME_IS_MOUNTED_WARN), mount_name);
WarningAlert(str);
sprintf(str, "umount %s", mount_name);
if (system(str)) {
sprintf(str, GetString(STR_CANNOT_UNMOUNT_WARN), mount_name, strerror(errno));
WarningAlert(str);
return NULL;
}
}
// Open file/device
#if defined(BINCUE)
void *binfd = open_bincue(name);
if (binfd) {
su_file_handle *fh = open_filehandle(name);
D(bug("opening %s as bincue\n", name));
fh->bincue_fd = binfd;
fh->is_bincue = true;
fh->read_only = true;
fh->is_media_present = true;
sys_add_su_file_handle(fh);
return fh;
}
#endif
#if defined(HAVE_LIBVHD)
int vhdsize;
void *vhdfd = vhd_unix_open(name, &vhdsize, read_only);
if (vhdfd) {
su_file_handle *fh = open_filehandle(name);
D(bug("opening %s as vnd\n", name));
fh->is_vhd = true;
fh->vhd_fd = vhdfd;
fh->read_only = read_only;
fh->file_size = vhdsize;
fh->is_media_present = true;
sys_add_su_file_handle(fh);
return fh;
}
#endif
#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__MACOSX__)
int fd = open(name, (read_only ? O_RDONLY : O_RDWR) | (is_cdrom ? O_NONBLOCK : 0));
#else
int fd = open(name, read_only ? O_RDONLY : O_RDWR);
#endif
if (fd < 0 && !read_only) {
// Read-write failed, try read-only
read_only = true;
fd = open(name, O_RDONLY);
}
if (fd >= 0 || is_polled_media) {
su_file_handle *fh = open_filehandle(name);
fh->fd = fd;
fh->is_file = is_file;
fh->read_only = read_only;
fh->is_floppy = is_floppy;
fh->is_cdrom = is_cdrom;
if (fh->is_file) {
fh->is_media_present = true;
// Detect disk image file layout
loff_t size = 0;
size = lseek(fd, 0, SEEK_END);
uint8 data[256];
lseek(fd, 0, SEEK_SET);
read(fd, data, 256);
FileDiskLayout(size, data, fh->start_byte, fh->file_size);
} else {
struct stat st;
if (fstat(fd, &st) == 0) {
fh->is_media_present = true;
if (S_ISBLK(st.st_mode)) {
fh->is_cdrom = is_cdrom;
#if defined(__linux__)
fh->is_floppy = (MAJOR(st.st_rdev) == FLOPPY_MAJOR);
#ifdef CDROM_GET_CAPABILITY
if (is_cdrom) {
fh->cdrom_cap = ioctl(fh->fd, CDROM_GET_CAPABILITY);
if (fh->cdrom_cap < 0)
fh->cdrom_cap = 0;
}
#endif
#elif defined(__FreeBSD__)
fh->is_floppy = ((st.st_rdev >> 16) == 2);
#ifdef CDIOCCAPABILITY
if (is_cdrom) {
if (ioctl(fh->fd, CDIOCCAPABILITY, &fh->cdrom_cap) < 0)
memset(&fh->cdrom_cap, 0, sizeof(fh->cdrom_cap));
}
#endif
#elif defined(__NetBSD__)
fh->is_floppy = ((st.st_rdev >> 16) == 2);
#endif
}
#if defined __MACOSX__
if (is_cdrom) {
fh->is_cdrom = true;
fh->is_floppy = false;
if (cdrom_open_1(fh))
fh->is_media_present = true;
}
#endif
}
