src/BeOS/sys_beos.cpp

/*
 *  sys_beos.cpp - System dependent routines, BeOS implementation
 *
 *  Basilisk II (C) 1997-2004 Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <StorageKit.h>
#include <InterfaceKit.h>
#include <kernel/fs_info.h>
#include <drivers/Drivers.h>
#include <device/scsi.h>

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>

#include "sysdeps.h"
#include "main.h"
#include "macos_util.h"
#include "prefs.h"
#include "user_strings.h"
#include "sys.h"

#define DEBUG 0
#include "debug.h"


// File handles are pointers to these structures
struct file_handle {
        file_handle *next;      // Pointer to next file handle (must be first in struct!)
        const char *name;       // File/device name (copied, for mount menu)
        int fd;                         // fd of file/device
        bool is_file;           // Flag: plain file or /dev/something?
        bool read_only;         // Copy of Sys_open() flag
        loff_t start_byte;      // Size of file header (if any)
        loff_t file_size;       // Size of file data (only valid if is_file is true)
};

// Linked list of file handles
static file_handle *first_file_handle;

// Temporary buffer for transfers from/to kernel space
const int TMP_BUF_SIZE = 0x10000;
static uint8 *tmp_buf;

// For B_SCSI_PREVENT_ALLOW
static const int32 PREVENT = 1;
static const int32 ALLOW = 0;


/*
 *  Check if device is a mounted HFS volume, get mount name
 */

static bool is_drive_mounted(const char *dev_name, char *mount_name)
{
        int32 i = 0;
        dev_t d;
        fs_info info;
        while ((d = next_dev(&i)) >= 0) {
                fs_stat_dev(d, &info);
                if (strcmp(dev_name, info.device_name) == 0) {
                        status_t err = -1;
                        BPath mount;
                        BDirectory dir;
                        BEntry entry;
                        node_ref node;
                        node.device = info.dev;
                        node.node = info.root;
                        err = dir.SetTo(&node);
                        if (!err)
                                err = dir.GetEntry(&entry);
                        if (!err)
                                err = entry.GetPath(&mount);
                        if (!err) {
                                strcpy(mount_name, mount.Path());
                                return true;
                        }
                }
        }
        return false;
}


/*
 *  Initialization
 */

void SysInit(void)
{
        first_file_handle = NULL;

        // Allocate temporary buffer
        tmp_buf = new uint8[TMP_BUF_SIZE];
}


/*
 *  Deinitialization
 */

void SysExit(void)
{
        delete[] tmp_buf;
}


/*
 *  Create menu of used volumes (for "mount" menu)
 */

void SysCreateVolumeMenu(BMenu *menu, uint32 msg)
{
        for (file_handle *fh=first_file_handle; fh; fh=fh->next)
                if (!SysIsFixedDisk(fh))
                        menu->AddItem(new BMenuItem(fh->name, new BMessage(msg)));
}


/*
 *  Mount volume given name from mount menu
 */

void SysMountVolume(const char *name)
{
        file_handle *fh;
        for (fh=first_file_handle; fh && strcmp(fh->name, name); fh=fh->next) ;
        if (fh)
                MountVolume(fh);
}


/*
 *  This gets called when no "floppy" prefs items are found
 *  It scans for available floppy drives and adds appropriate prefs items
 */

void SysAddFloppyPrefs(void)
{
        // Only one floppy drive under BeOS
        PrefsAddString("floppy", "/dev/disk/floppy/raw");
}


/*
 *  This gets called when no "disk" prefs items are found
 *  It scans for available HFS volumes and adds appropriate prefs items
 */

void SysAddDiskPrefs(void)
{
        // Let BeOS scan for HFS drives
        D(bug("Looking for Mac volumes...\n"));
        system("mountvolume -allhfs");

        // Add all HFS volumes
        int32 i = 0;
        dev_t d;
        fs_info info;
        while ((d = next_dev(&i)) >= 0) {
                fs_stat_dev(d, &info);
                status_t err = -1;
                BPath mount;
                if (!strcmp(info.fsh_name, "hfs")) {
                        BDirectory dir;
                        BEntry entry;
                        node_ref node;
                        node.device = info.dev;
                        node.node = info.root;
                        err = dir.SetTo(&node);
                        if (!err)
                                err = dir.GetEntry(&entry);
                        if (!err)
                                err = entry.GetPath(&mount);
                }
                if (!err)
                        err = unmount(mount.Path());
                if (!err) {
                        char dev_name[B_FILE_NAME_LENGTH];
                        if (info.flags & B_FS_IS_READONLY) {
                                dev_name[0] = '*';
                                dev_name[1] = 0;
                        } else
                                dev_name[0] = 0;
                        strcat(dev_name, info.device_name);
                        PrefsAddString("disk", dev_name);
                }
        }
}


/*
 *  This gets called when no "cdrom" prefs items are found
 *  It scans for available CD-ROM drives and adds appropriate prefs items
 */

// Scan directory for CD-ROM drives, add them to prefs
static void scan_for_cdrom_drives(const char *directory)
{
        // Set directory
        BDirectory dir;
        dir.SetTo(directory);
        if (dir.InitCheck() != B_NO_ERROR)
                return;
        dir.Rewind();

        // Scan each entry
        BEntry entry;
        while (dir.GetNextEntry(&entry) >= 0) {

                // Get path and ref for entry
                BPath path;
                if (entry.GetPath(&path) != B_NO_ERROR)
                        continue;
                const char *name = path.Path();
                entry_ref e;
                if (entry.GetRef(&e) != B_NO_ERROR)
                        continue;

                // Recursively enter subdirectories (except for floppy)
                if (entry.IsDirectory()) {
                        if (!strcmp(e.name, "floppy"))
                                continue;
                        scan_for_cdrom_drives(name);
                } else {

                        D(bug(" checking '%s'\n", name));

                        // Ignore partitions
                        if (strcmp(e.name, "raw"))
                                continue;

                        // Open device
                        int fd = open(name, O_RDONLY);
                        if (fd < 0)
                                continue;

                        // Get geometry and device type
                        device_geometry g;
                        if (ioctl(fd, B_GET_GEOMETRY, &g, sizeof(g)) < 0) {
                                close(fd);
                                continue;
                        }

                        // Insert to list if it is a CD drive
                        if (g.device_type == B_CD)
                                PrefsAddString("cdrom", name);
                        close(fd);
                }
        }
}

void SysAddCDROMPrefs(void)
{
        // Don't scan for drives if nocdrom option given
        if (PrefsFindBool("nocdrom"))
                return;

        // Look for CD-ROM drives and add prefs items
        D(bug("Looking for CD-ROM drives...\n"));
        scan_for_cdrom_drives("/dev/disk");
}


/*
 *  Add default serial prefs (must be added, even if no ports present)
 */

void SysAddSerialPrefs(void)
{
        system_info info;
        get_system_info(&info);
        switch (info.platform_type) {
                case B_BEBOX_PLATFORM:
                case B_AT_CLONE_PLATFORM:
                        PrefsAddString("seriala", "serial1");
                        PrefsAddString("serialb", "serial2");
                        break;
                case B_MAC_PLATFORM:
                        PrefsAddString("seriala", "modem");
                        PrefsAddString("serialb", "printer");
                        break;
                default:
                        PrefsAddString("seriala", "none");
                        PrefsAddString("serialb", "none");
                        break;
        }
}


/*
 *  Open file/device, create new file handle (returns NULL on error)
 */

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);
                if (unmount(mount_name) != 0) {
                        sprintf(str, GetString(STR_CANNOT_UNMOUNT_WARN), mount_name);
                        WarningAlert(str);
                        return NULL;
                }
        }

        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;
}


/*
 *  Close file/device, delete file handle
 */

void Sys_close(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return;

        // Free device name and close file/device
        free((void *)fh->name);
        close(fh->fd);

        // Dequeue file handle
        file_handle *q = first_file_handle;
        if (q == fh) {
                first_file_handle = NULL;
                delete fh;
                return;
        }
        while (q) {
                if (q->next == fh) {
                        q->next = fh->next;
                        delete fh;
                        return;
                }
                q = q->next;
        }
}


/*
 *  Read "length" bytes from file/device, starting at "offset", to "buffer",
 *  returns number of bytes read (or 0)
 */

static inline ssize_t sread(int fd, void *buf, size_t count)
{
        ssize_t res;
        while ((res = read(fd, buf, count)) == B_INTERRUPTED) ;
        return res;
}

size_t Sys_read(void *arg, void *buffer, loff_t offset, size_t length)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return 0;

//      D(bug("Sys_read(%08lx, %08lx, %Ld, %d)\n", fh, buffer, offset, length));

        // Seek to position
        if (lseek(fh->fd, offset + fh->start_byte, SEEK_SET) < 0)
                return 0;

        // Buffer in kernel space?
        size_t actual = 0;
        if ((uint32)buffer < 0x80000000) {

                // Yes, transfer via buffer
                while (length) {
                        size_t transfer_size = (length > TMP_BUF_SIZE) ? TMP_BUF_SIZE : length;
                        if (sread(fh->fd, tmp_buf, transfer_size) != transfer_size)
                                return actual;
                        memcpy(buffer, tmp_buf, transfer_size);
                        buffer = (void *)((uint8 *)buffer + transfer_size);
                        length -= transfer_size;
                        actual += transfer_size;
                }

        } else {

                // No, transfer directly
                actual = sread(fh->fd, buffer, length);
                if (actual < 0)
                        actual = 0;
        }
        return actual;
}


/*
 *  Write "length" bytes from "buffer" to file/device, starting at "offset",
 *  returns number of bytes written (or 0)
 */

static inline ssize_t swrite(int fd, void *buf, size_t count)
{
        ssize_t res;
        while ((res = write(fd, buf, count)) == B_INTERRUPTED) ;
        return res;
}

size_t Sys_write(void *arg, void *buffer, loff_t offset, size_t length)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return 0;

//      D(bug("Sys_write(%08lx, %08lx, %Ld, %d)\n", fh, buffer, offset, length));

        // Seek to position
        if (lseek(fh->fd, offset + fh->start_byte, SEEK_SET) < 0)
                return 0;

        // Buffer in kernel space?
        size_t actual = 0;
        if ((uint32)buffer < 0x80000000) {

                // Yes, transfer via buffer
                while (length) {
                        size_t transfer_size = (length > TMP_BUF_SIZE) ? TMP_BUF_SIZE : length;
                        memcpy(tmp_buf, buffer, transfer_size);
                        if (swrite(fh->fd, tmp_buf, transfer_size) != transfer_size)
                                return actual;
                        buffer = (void *)((uint8 *)buffer + transfer_size);
                        length -= transfer_size;
                        actual += transfer_size;
                }

        } else {

                // No, transfer directly
                actual = swrite(fh->fd, buffer, length);
                if (actual < 0)
                        actual = 0;
        }
        return actual;
}


/*
 *  Return size of file/device (minus header)
 */

loff_t SysGetFileSize(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return true;

        if (fh->is_file)
                return fh->file_size;
        else {
                device_geometry g;
                if (ioctl(fh->fd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0)
                        return (loff_t)g.bytes_per_sector * g.sectors_per_track * g.cylinder_count * g.head_count;
                else
                        return 0;
        }
}


/*
 *  Eject volume (if applicable)
 */

void SysEject(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return;

        if (!fh->is_file)
                ioctl(fh->fd, B_EJECT_DEVICE);
}


/*
 *  Format volume (if applicable)
 */

bool SysFormat(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return false;

        if (!fh->is_file)
                return ioctl(fh->fd, B_FORMAT_DEVICE) >= 0;
        else
                return false;
}


/*
 *  Check if file/device is read-only (this includes the read-only flag on Sys_open())
 */

bool SysIsReadOnly(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return true;

        if (fh->is_file) {

                // File, return flag given to Sys_open
                return fh->read_only;

        } else {

                // Device, check write protection
                device_geometry g;
                if (ioctl(fh->fd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0)
                        return g.read_only | fh->read_only;
                else
                        return fh->read_only;   // Removable but not inserted
        }
}


/*
 *  Check if the given file handle refers to a fixed or a removable disk
 */

bool SysIsFixedDisk(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return true;

        if (fh->is_file)
                return true;
        else {
                device_geometry g;
                if (ioctl(fh->fd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0)
                        return !g.removable;
                else
                        return false;   // Removable but not inserted
        }
}


/*
 *  Check if a disk is inserted in the drive (always true for files)
 */

bool SysIsDiskInserted(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return false;

        if (fh->is_file)
                return true;
        else {
                status_t l;
                if (ioctl(fh->fd, B_GET_MEDIA_STATUS, &l, sizeof(l)) >= 0 && l == B_NO_ERROR)
                        return true;
                else
                        return false;
        }
}


/*
 *  Prevent medium removal (if applicable)
 */

void SysPreventRemoval(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return;

        if (!fh->is_file)
                ioctl(fh->fd, B_SCSI_PREVENT_ALLOW, &PREVENT, sizeof(PREVENT));
}


/*
 *  Allow medium removal (if applicable)
 */

void SysAllowRemoval(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return;

        if (!fh->is_file)
                ioctl(fh->fd, B_SCSI_PREVENT_ALLOW, &ALLOW, sizeof(ALLOW));
}


/*
 *  Read CD-ROM TOC (binary MSF format, 804 bytes max.)
 */

bool SysCDReadTOC(void *arg, uint8 *toc)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return false;

        if (!fh->is_file) {
                memset(tmp_buf, 0, 804);
                if (ioctl(fh->fd, B_SCSI_GET_TOC, tmp_buf, 804) < 0)
                        return false;
                memcpy(toc, tmp_buf, 804);
                return true;
        } else
                return false;
}


/*
 *  Read CD-ROM position data (Sub-Q Channel, 16 bytes, see SCSI standard)
 */

bool SysCDGetPosition(void *arg, uint8 *pos)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return false;

        if (!fh->is_file) {
                if (ioctl(fh->fd, B_SCSI_GET_POSITION, tmp_buf, 16) < 0)
                        return false;
                memcpy(pos, tmp_buf, 16);
                return true;
        } else
                return false;
}


/*
 *  Play CD audio
 */

bool SysCDPlay(void *arg, uint8 start_m, uint8 start_s, uint8 start_f, uint8 end_m, uint8 end_s, uint8 end_f)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return false;

        if (!fh->is_file) {
                scsi_play_position *p = (scsi_play_position *)tmp_buf;
                p->start_m = start_m;
                p->start_s = start_s;
                p->start_f = start_f;
                p->end_m = end_m;
                p->end_s = end_s;
                p->end_f = end_f;
                return ioctl(fh->fd, B_SCSI_PLAY_POSITION, p, sizeof(scsi_play_position)) == 0;
        } else
                return false;
}


/*
 *  Pause CD audio
 */

bool SysCDPause(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return true;

        if (!fh->is_file)
                return ioctl(fh->fd, B_SCSI_PAUSE_AUDIO) == 0;
        else
                return false;
}


/*
 *  Resume paused CD audio
 */

bool SysCDResume(void *arg)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return false;

        if (!fh->is_file)
                return ioctl(fh->fd, B_SCSI_RESUME_AUDIO) == 0;
        else
                return false;
}


/*
 *  Stop CD audio
 */

bool SysCDStop(void *arg, uint8 lead_out_m, uint8 lead_out_s, uint8 lead_out_f)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return false;

        if (!fh->is_file)
                return ioctl(fh->fd, B_SCSI_STOP_AUDIO) == 0;
        else
                return false;
}


/*
 *  Perform CD audio fast-forward/fast-reverse operation starting from specified address
 */

bool SysCDScan(void *arg, uint8 start_m, uint8 start_s, uint8 start_f, bool reverse)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return false;

        if (!fh->is_file) {
                scsi_scan *p = (scsi_scan *)tmp_buf;
                p->speed = 0;
                p->direction = reverse ? -1 : 1;
                return ioctl(fh->fd, B_SCSI_SCAN, p, sizeof(scsi_scan)) == 0;
        } else
                return false;
}


/*
 *  Set CD audio volume (0..255 each channel)
 */

void SysCDSetVolume(void *arg, uint8 left, uint8 right)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return;

        if (!fh->is_file) {
                scsi_volume *p = (scsi_volume *)tmp_buf;
                p->flags = B_SCSI_PORT0_VOLUME | B_SCSI_PORT1_VOLUME;
                p->port0_volume = left;
                p->port1_volume = right;
                ioctl(fh->fd, B_SCSI_SET_VOLUME, p, sizeof(scsi_volume));
        }
}


/*
 *  Get CD audio volume (0..255 each channel)
 */

void SysCDGetVolume(void *arg, uint8 &left, uint8 &right)
{
        file_handle *fh = (file_handle *)arg;
        if (!fh)
                return;

        left = right = 0;
        if (!fh->is_file) {
                scsi_volume *p = (scsi_volume *)tmp_buf;
                p->flags = B_SCSI_PORT0_VOLUME | B_SCSI_PORT1_VOLUME;
                if (ioctl(fh->fd, B_SCSI_GET_VOLUME, p, sizeof(scsi_volume)) == 0) {
                        left = p->port0_volume;
                        right = p->port1_volume;
                }
        }
}
Revision:	1.5
Committed:	2004-01-12T15:29:23Z (20 years, 10 months ago) by cebix
Branch:	MAIN
CVS Tags:	nigel-build-16, nigel-build-15
Changes since 1.4:	+1 -1 lines
Log Message:	Happy New Year! :)
#	Content
1	/*
2	* sys_beos.cpp - System dependent routines, BeOS implementation
3	*
4	* Basilisk II (C) 1997-2004 Christian Bauer
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*/
20
21	#include <StorageKit.h>
22	#include <InterfaceKit.h>
23	#include <kernel/fs_info.h>
24	#include <drivers/Drivers.h>
25	#include <device/scsi.h>
26
27	#include <unistd.h>
28	#include <stdio.h>
29	#include <stdlib.h>
30	#include <string.h>
31	#include <fcntl.h>
32
33	#include "sysdeps.h"
34	#include "main.h"
35	#include "macos_util.h"
36	#include "prefs.h"
37	#include "user_strings.h"
38	#include "sys.h"
39
40	#define DEBUG 0
41	#include "debug.h"
42
43
44	// File handles are pointers to these structures
45	struct file_handle {
46	file_handle *next; // Pointer to next file handle (must be first in struct!)
47	const char *name; // File/device name (copied, for mount menu)
48	int fd; // fd of file/device
49	bool is_file; // Flag: plain file or /dev/something?
50	bool read_only; // Copy of Sys_open() flag
51	loff_t start_byte; // Size of file header (if any)
52	loff_t file_size; // Size of file data (only valid if is_file is true)
53	};
54
55	// Linked list of file handles
56	static file_handle *first_file_handle;
57
58	// Temporary buffer for transfers from/to kernel space
59	const int TMP_BUF_SIZE = 0x10000;
60	static uint8 *tmp_buf;
61
62	// For B_SCSI_PREVENT_ALLOW
63	static const int32 PREVENT = 1;
64	static const int32 ALLOW = 0;
65
66
67	/*
68	* Check if device is a mounted HFS volume, get mount name
69	*/
70
71	static bool is_drive_mounted(const char dev_name, char mount_name)
72	{
73	int32 i = 0;
74	dev_t d;
75	fs_info info;
76	while ((d = next_dev(&i)) >= 0) {
77	fs_stat_dev(d, &info);
78	if (strcmp(dev_name, info.device_name) == 0) {
79	status_t err = -1;
80	BPath mount;
81	BDirectory dir;
82	BEntry entry;
83	node_ref node;
84	node.device = info.dev;
85	node.node = info.root;
86	err = dir.SetTo(&node);
87	if (!err)
88	err = dir.GetEntry(&entry);
89	if (!err)
90	err = entry.GetPath(&mount);
91	if (!err) {
92	strcpy(mount_name, mount.Path());
93	return true;
94	}
95	}
96	}
97	return false;
98	}
99
100
101	/*
102	* Initialization
103	*/
104
105	void SysInit(void)
106	{
107	first_file_handle = NULL;
108
109	// Allocate temporary buffer
110	tmp_buf = new uint8[TMP_BUF_SIZE];
111	}
112
113
114	/*
115	* Deinitialization
116	*/
117
118	void SysExit(void)
119	{
120	delete[] tmp_buf;
121	}
122
123
124	/*
125	* Create menu of used volumes (for "mount" menu)
126	*/
127
128	void SysCreateVolumeMenu(BMenu *menu, uint32 msg)
129	{
130	for (file_handle *fh=first_file_handle; fh; fh=fh->next)
131	if (!SysIsFixedDisk(fh))
132	menu->AddItem(new BMenuItem(fh->name, new BMessage(msg)));
133	}
134
135
136	/*
137	* Mount volume given name from mount menu
138	*/
139
140	void SysMountVolume(const char *name)
141	{
142	file_handle *fh;
143	for (fh=first_file_handle; fh && strcmp(fh->name, name); fh=fh->next) ;
144	if (fh)
145	MountVolume(fh);
146	}
147
148
149	/*
150	* This gets called when no "floppy" prefs items are found
151	* It scans for available floppy drives and adds appropriate prefs items
152	*/
153
154	void SysAddFloppyPrefs(void)
155	{
156	// Only one floppy drive under BeOS
157	PrefsAddString("floppy", "/dev/disk/floppy/raw");
158	}
159
160
161	/*
162	* This gets called when no "disk" prefs items are found
163	* It scans for available HFS volumes and adds appropriate prefs items
164	*/
165
166	void SysAddDiskPrefs(void)
167	{
168	// Let BeOS scan for HFS drives
169	D(bug("Looking for Mac volumes...\n"));
170	system("mountvolume -allhfs");
171
172	// Add all HFS volumes
173	int32 i = 0;
174	dev_t d;
175	fs_info info;
176	while ((d = next_dev(&i)) >= 0) {
177	fs_stat_dev(d, &info);
178	status_t err = -1;
179	BPath mount;
180	if (!strcmp(info.fsh_name, "hfs")) {
181	BDirectory dir;
182	BEntry entry;
183	node_ref node;
184	node.device = info.dev;
185	node.node = info.root;
186	err = dir.SetTo(&node);
187	if (!err)
188	err = dir.GetEntry(&entry);
189	if (!err)
190	err = entry.GetPath(&mount);
191	}
192	if (!err)
193	err = unmount(mount.Path());
194	if (!err) {
195	char dev_name[B_FILE_NAME_LENGTH];
196	if (info.flags & B_FS_IS_READONLY) {
197	dev_name[0] = '*';
198	dev_name[1] = 0;
199	} else
200	dev_name[0] = 0;
201	strcat(dev_name, info.device_name);
202	PrefsAddString("disk", dev_name);
203	}
204	}
205	}
206
207
208	/*
209	* This gets called when no "cdrom" prefs items are found
210	* It scans for available CD-ROM drives and adds appropriate prefs items
211	*/
212
213	// Scan directory for CD-ROM drives, add them to prefs
214	static void scan_for_cdrom_drives(const char *directory)
215	{
216	// Set directory
217	BDirectory dir;
218	dir.SetTo(directory);
219	if (dir.InitCheck() != B_NO_ERROR)
220	return;
221	dir.Rewind();
222
223	// Scan each entry
224	BEntry entry;
225	while (dir.GetNextEntry(&entry) >= 0) {
226
227	// Get path and ref for entry
228	BPath path;
229	if (entry.GetPath(&path) != B_NO_ERROR)
230	continue;
231	const char *name = path.Path();
232	entry_ref e;
233	if (entry.GetRef(&e) != B_NO_ERROR)
234	continue;
235
236	// Recursively enter subdirectories (except for floppy)
237	if (entry.IsDirectory()) {
238	if (!strcmp(e.name, "floppy"))
239	continue;
240	scan_for_cdrom_drives(name);
241	} else {
242
243	D(bug(" checking '%s'\n", name));
244
245	// Ignore partitions
246	if (strcmp(e.name, "raw"))
247	continue;
248
249	// Open device
250	int fd = open(name, O_RDONLY);
251	if (fd < 0)
252	continue;
253
254	// Get geometry and device type
255	device_geometry g;
256	if (ioctl(fd, B_GET_GEOMETRY, &g, sizeof(g)) < 0) {
257	close(fd);
258	continue;
259	}
260
261	// Insert to list if it is a CD drive
262	if (g.device_type == B_CD)
263	PrefsAddString("cdrom", name);
264	close(fd);
265	}
266	}
267	}
268
269	void SysAddCDROMPrefs(void)
270	{
271	// Don't scan for drives if nocdrom option given
272	if (PrefsFindBool("nocdrom"))
273	return;
274
275	// Look for CD-ROM drives and add prefs items
276	D(bug("Looking for CD-ROM drives...\n"));
277	scan_for_cdrom_drives("/dev/disk");
278	}
279
280
281	/*
282	* Add default serial prefs (must be added, even if no ports present)
283	*/
284
285	void SysAddSerialPrefs(void)
286	{
287	system_info info;
288	get_system_info(&info);
289	switch (info.platform_type) {
290	case B_BEBOX_PLATFORM:
291	case B_AT_CLONE_PLATFORM:
292	PrefsAddString("seriala", "serial1");
293	PrefsAddString("serialb", "serial2");
294	break;
295	case B_MAC_PLATFORM:
296	PrefsAddString("seriala", "modem");
297	PrefsAddString("serialb", "printer");
298	break;
299	default:
300	PrefsAddString("seriala", "none");
301	PrefsAddString("serialb", "none");
302	break;
303	}
304	}
305
306
307	/*
308	* Open file/device, create new file handle (returns NULL on error)
309	*/
310
311	void Sys_open(const char name, bool read_only)
312	{
313	static bool published_all = false;
314	bool is_file = (strstr(name, "/dev/") != name);
315
316	D(bug("Sys_open(%s, %s)\n", name, read_only ? "read-only" : "read/write"));
317
318	// Print warning message and eventually unmount drive when this is an HFS volume mounted under BeOS (double mounting will corrupt the volume)
319	char mount_name[B_FILE_NAME_LENGTH];
320	if (!is_file && !read_only && is_drive_mounted(name, mount_name)) {
321	char str[256 + B_FILE_NAME_LENGTH];
322	sprintf(str, GetString(STR_VOLUME_IS_MOUNTED_WARN), mount_name);
323	WarningAlert(str);
324	if (unmount(mount_name) != 0) {
325	sprintf(str, GetString(STR_CANNOT_UNMOUNT_WARN), mount_name);
326	WarningAlert(str);
327	return NULL;
328	}
329	}
330
331	int fd = open(name, read_only ? O_RDONLY : O_RDWR);
332	if (fd < 0 && !published_all) {
333	// Open failed, create all device nodes and try again, but only the first time
334	system("mountvolume -publishall");
335	published_all = true;
336	fd = open(name, read_only ? O_RDONLY : O_RDWR);
337	}
338	if (fd >= 0) {
339	file_handle *fh = new file_handle;
340	fh->name = strdup(name);
341	fh->fd = fd;
342	fh->is_file = is_file;
343	fh->read_only = read_only;
344	fh->start_byte = 0;
345	if (fh->is_file) {
346	// Detect disk image file layout
347	loff_t size = lseek(fd, 0, SEEK_END);
348	uint8 data[256];
349	lseek(fd, 0, SEEK_SET);
350	read(fd, data, 256);
351	FileDiskLayout(size, data, fh->start_byte, fh->file_size);
352	}
353
354	// Enqueue file handle
355	fh->next = NULL;
356	file_handle *q = first_file_handle;
357	if (q) {
358	while (q->next)
359	q = q->next;
360	q->next = fh;
361	} else
362	first_file_handle = fh;
363	return fh;
364	} else
365	return NULL;
366	}
367
368
369	/*
370	* Close file/device, delete file handle
371	*/
372
373	void Sys_close(void *arg)
374	{
375	file_handle fh = (file_handle )arg;
376	if (!fh)
377	return;
378
379	// Free device name and close file/device
380	free((void *)fh->name);
381	close(fh->fd);
382
383	// Dequeue file handle
384	file_handle *q = first_file_handle;
385	if (q == fh) {
386	first_file_handle = NULL;
387	delete fh;
388	return;
389	}
390	while (q) {
391	if (q->next == fh) {
392	q->next = fh->next;
393	delete fh;
394	return;
395	}
396	q = q->next;
397	}
398	}
399
400
401	/*
402	* Read "length" bytes from file/device, starting at "offset", to "buffer",
403	* returns number of bytes read (or 0)
404	*/
405
406	static inline ssize_t sread(int fd, void *buf, size_t count)
407	{
408	ssize_t res;
409	while ((res = read(fd, buf, count)) == B_INTERRUPTED) ;
410	return res;
411	}
412
413	size_t Sys_read(void arg, void buffer, loff_t offset, size_t length)
414	{
415	file_handle fh = (file_handle )arg;
416	if (!fh)
417	return 0;
418
419	// D(bug("Sys_read(%08lx, %08lx, %Ld, %d)\n", fh, buffer, offset, length));
420
421	// Seek to position
422	if (lseek(fh->fd, offset + fh->start_byte, SEEK_SET) < 0)
423	return 0;
424
425	// Buffer in kernel space?
426	size_t actual = 0;
427	if ((uint32)buffer < 0x80000000) {
428
429	// Yes, transfer via buffer
430	while (length) {
431	size_t transfer_size = (length > TMP_BUF_SIZE) ? TMP_BUF_SIZE : length;
432	if (sread(fh->fd, tmp_buf, transfer_size) != transfer_size)
433	return actual;
434	memcpy(buffer, tmp_buf, transfer_size);
435	buffer = (void )((uint8 )buffer + transfer_size);
436	length -= transfer_size;
437	actual += transfer_size;
438	}
439
440	} else {
441
442	// No, transfer directly
443	actual = sread(fh->fd, buffer, length);
444	if (actual < 0)
445	actual = 0;
446	}
447	return actual;
448	}
449
450
451	/*
452	* Write "length" bytes from "buffer" to file/device, starting at "offset",
453	* returns number of bytes written (or 0)
454	*/
455
456	static inline ssize_t swrite(int fd, void *buf, size_t count)
457	{
458	ssize_t res;
459	while ((res = write(fd, buf, count)) == B_INTERRUPTED) ;
460	return res;
461	}
462
463	size_t Sys_write(void arg, void buffer, loff_t offset, size_t length)
464	{
465	file_handle fh = (file_handle )arg;
466	if (!fh)
467	return 0;
468
469	// D(bug("Sys_write(%08lx, %08lx, %Ld, %d)\n", fh, buffer, offset, length));
470
471	// Seek to position
472	if (lseek(fh->fd, offset + fh->start_byte, SEEK_SET) < 0)
473	return 0;
474
475	// Buffer in kernel space?
476	size_t actual = 0;
477	if ((uint32)buffer < 0x80000000) {
478
479	// Yes, transfer via buffer
480	while (length) {
481	size_t transfer_size = (length > TMP_BUF_SIZE) ? TMP_BUF_SIZE : length;
482	memcpy(tmp_buf, buffer, transfer_size);
483	if (swrite(fh->fd, tmp_buf, transfer_size) != transfer_size)
484	return actual;
485	buffer = (void )((uint8 )buffer + transfer_size);
486	length -= transfer_size;
487	actual += transfer_size;
488	}
489
490	} else {
491
492	// No, transfer directly
493	actual = swrite(fh->fd, buffer, length);
494	if (actual < 0)
495	actual = 0;
496	}
497	return actual;
498	}
499
500
501	/*
502	* Return size of file/device (minus header)
503	*/
504
505	loff_t SysGetFileSize(void *arg)
506	{
507	file_handle fh = (file_handle )arg;
508	if (!fh)
509	return true;
510
511	if (fh->is_file)
512	return fh->file_size;
513	else {
514	device_geometry g;
515	if (ioctl(fh->fd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0)
516	return (loff_t)g.bytes_per_sector * g.sectors_per_track * g.cylinder_count * g.head_count;
517	else
518	return 0;
519	}
520	}
521
522
523	/*
524	* Eject volume (if applicable)
525	*/
526
527	void SysEject(void *arg)
528	{
529	file_handle fh = (file_handle )arg;
530	if (!fh)
531	return;
532
533	if (!fh->is_file)
534	ioctl(fh->fd, B_EJECT_DEVICE);
535	}
536
537
538	/*
539	* Format volume (if applicable)
540	*/
541
542	bool SysFormat(void *arg)
543	{
544	file_handle fh = (file_handle )arg;
545	if (!fh)
546	return false;
547
548	if (!fh->is_file)
549	return ioctl(fh->fd, B_FORMAT_DEVICE) >= 0;
550	else
551	return false;
552	}
553
554
555	/*
556	* Check if file/device is read-only (this includes the read-only flag on Sys_open())
557	*/
558
559	bool SysIsReadOnly(void *arg)
560	{
561	file_handle fh = (file_handle )arg;
562	if (!fh)
563	return true;
564
565	if (fh->is_file) {
566
567	// File, return flag given to Sys_open
568	return fh->read_only;
569
570	} else {
571
572	// Device, check write protection
573	device_geometry g;
574	if (ioctl(fh->fd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0)
575	return g.read_only \| fh->read_only;
576	else
577	return fh->read_only; // Removable but not inserted
578	}
579	}
580
581
582	/*
583	* Check if the given file handle refers to a fixed or a removable disk
584	*/
585
586	bool SysIsFixedDisk(void *arg)
587	{
588	file_handle fh = (file_handle )arg;
589	if (!fh)
590	return true;
591
592	if (fh->is_file)
593	return true;
594	else {
595	device_geometry g;
596	if (ioctl(fh->fd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0)
597	return !g.removable;
598	else
599	return false; // Removable but not inserted
600	}
601	}
602
603
604	/*
605	* Check if a disk is inserted in the drive (always true for files)
606	*/
607
608	bool SysIsDiskInserted(void *arg)
609	{
610	file_handle fh = (file_handle )arg;
611	if (!fh)
612	return false;
613
614	if (fh->is_file)
615	return true;
616	else {
617	status_t l;
618	if (ioctl(fh->fd, B_GET_MEDIA_STATUS, &l, sizeof(l)) >= 0 && l == B_NO_ERROR)
619	return true;
620	else
621	return false;
622	}
623	}
624
625
626	/*
627	* Prevent medium removal (if applicable)
628	*/
629
630	void SysPreventRemoval(void *arg)
631	{
632	file_handle fh = (file_handle )arg;
633	if (!fh)
634	return;
635
636	if (!fh->is_file)
637	ioctl(fh->fd, B_SCSI_PREVENT_ALLOW, &PREVENT, sizeof(PREVENT));
638	}
639
640
641	/*
642	* Allow medium removal (if applicable)
643	*/
644
645	void SysAllowRemoval(void *arg)
646	{
647	file_handle fh = (file_handle )arg;
648	if (!fh)
649	return;
650
651	if (!fh->is_file)
652	ioctl(fh->fd, B_SCSI_PREVENT_ALLOW, &ALLOW, sizeof(ALLOW));
653	}
654
655
656	/*
657	* Read CD-ROM TOC (binary MSF format, 804 bytes max.)
658	*/
659
660	bool SysCDReadTOC(void arg, uint8 toc)
661	{
662	file_handle fh = (file_handle )arg;
663	if (!fh)
664	return false;
665
666	if (!fh->is_file) {
667	memset(tmp_buf, 0, 804);
668	if (ioctl(fh->fd, B_SCSI_GET_TOC, tmp_buf, 804) < 0)
669	return false;
670	memcpy(toc, tmp_buf, 804);
671	return true;
672	} else
673	return false;
674	}
675
676
677	/*
678	* Read CD-ROM position data (Sub-Q Channel, 16 bytes, see SCSI standard)
679	*/
680
681	bool SysCDGetPosition(void arg, uint8 pos)
682	{
683	file_handle fh = (file_handle )arg;
684	if (!fh)
685	return false;
686
687	if (!fh->is_file) {
688	if (ioctl(fh->fd, B_SCSI_GET_POSITION, tmp_buf, 16) < 0)
689	return false;
690	memcpy(pos, tmp_buf, 16);
691	return true;
692	} else
693	return false;
694	}
695
696
697	/*
698	* Play CD audio
699	*/
700
701	bool SysCDPlay(void *arg, uint8 start_m, uint8 start_s, uint8 start_f, uint8 end_m, uint8 end_s, uint8 end_f)
702	{
703	file_handle fh = (file_handle )arg;
704	if (!fh)
705	return false;
706
707	if (!fh->is_file) {
708	scsi_play_position p = (scsi_play_position )tmp_buf;
709	p->start_m = start_m;
710	p->start_s = start_s;
711	p->start_f = start_f;
712	p->end_m = end_m;
713	p->end_s = end_s;
714	p->end_f = end_f;
715	return ioctl(fh->fd, B_SCSI_PLAY_POSITION, p, sizeof(scsi_play_position)) == 0;
716	} else
717	return false;
718	}
719
720
721	/*
722	* Pause CD audio
723	*/
724
725	bool SysCDPause(void *arg)
726	{
727	file_handle fh = (file_handle )arg;
728	if (!fh)
729	return true;
730
731	if (!fh->is_file)
732	return ioctl(fh->fd, B_SCSI_PAUSE_AUDIO) == 0;
733	else
734	return false;
735	}
736
737
738	/*
739	* Resume paused CD audio
740	*/
741
742	bool SysCDResume(void *arg)
743	{
744	file_handle fh = (file_handle )arg;
745	if (!fh)
746	return false;
747
748	if (!fh->is_file)
749	return ioctl(fh->fd, B_SCSI_RESUME_AUDIO) == 0;
750	else
751	return false;
752	}
753
754
755	/*
756	* Stop CD audio
757	*/
758
759	bool SysCDStop(void *arg, uint8 lead_out_m, uint8 lead_out_s, uint8 lead_out_f)
760	{
761	file_handle fh = (file_handle )arg;
762	if (!fh)
763	return false;
764
765	if (!fh->is_file)
766	return ioctl(fh->fd, B_SCSI_STOP_AUDIO) == 0;
767	else
768	return false;
769	}
770
771
772	/*
773	* Perform CD audio fast-forward/fast-reverse operation starting from specified address
774	*/
775
776	bool SysCDScan(void *arg, uint8 start_m, uint8 start_s, uint8 start_f, bool reverse)
777	{
778	file_handle fh = (file_handle )arg;
779	if (!fh)
780	return false;
781
782	if (!fh->is_file) {
783	scsi_scan p = (scsi_scan )tmp_buf;
784	p->speed = 0;
785	p->direction = reverse ? -1 : 1;
786	return ioctl(fh->fd, B_SCSI_SCAN, p, sizeof(scsi_scan)) == 0;
787	} else
788	return false;
789	}
790
791
792	/*
793	* Set CD audio volume (0..255 each channel)
794	*/
795
796	void SysCDSetVolume(void *arg, uint8 left, uint8 right)
797	{
798	file_handle fh = (file_handle )arg;
799	if (!fh)
800	return;
801
802	if (!fh->is_file) {
803	scsi_volume p = (scsi_volume )tmp_buf;
804	p->flags = B_SCSI_PORT0_VOLUME \| B_SCSI_PORT1_VOLUME;
805	p->port0_volume = left;
806	p->port1_volume = right;
807	ioctl(fh->fd, B_SCSI_SET_VOLUME, p, sizeof(scsi_volume));
808	}
809	}
810
811
812	/*
813	* Get CD audio volume (0..255 each channel)
814	*/
815
816	void SysCDGetVolume(void *arg, uint8 &left, uint8 &right)
817	{
818	file_handle fh = (file_handle )arg;
819	if (!fh)
820	return;
821
822	left = right = 0;
823	if (!fh->is_file) {
824	scsi_volume p = (scsi_volume )tmp_buf;
825	p->flags = B_SCSI_PORT0_VOLUME \| B_SCSI_PORT1_VOLUME;
826	if (ioctl(fh->fd, B_SCSI_GET_VOLUME, p, sizeof(scsi_volume)) == 0) {
827	left = p->port0_volume;
828	right = p->port1_volume;
829	}
830	}
831	}