newlib/winsup/cygwin/mtinfo.h

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* errno.cc (errmap): Map ERROR_SHARING_VIOLATION to EBUSY, ERROR_EOM_OVERFLOW and ERROR_NO_DATA_DETECTED to EIO. Add mappings for ERROR_NO_MEDIA_IN_DRIVE, ERROR_DEVICE_REQUIRES_CLEANING and ERROR_DEVICE_DOOR_OPEN. * fhandler.h (class fhandler_dev_raw): Drop varblkop member. (fhandler_dev_raw::is_eom): De-virtualize. (fhandler_dev_raw::is_eof): Ditto. (class fhandler_dev_tape): Drop lasterr and dp member. Add mt_mtx member. Drop all private methods formerly used by ioctl. (fhandler_dev_tape::is_rewind_device): Use get_minor for clarity. (fhandler_dev_tape::driveno): New method. (fhandler_dev_tape::drive_init): New method. (fhandler_dev_tape::clear): Remove method. (fhandler_dev_tape::is_eom): Ditto. (fhandler_dev_tape::is_eof): Ditto. (fhandler_dev_tape::write_file): Ditto. (fhandler_dev_tape::read_file): Ditto. (fhandler_dev_tape::_lock): New method. (fhandler_dev_tape::unlock): New method. (fhandler_dev_tape::raw_read): New method. (fhandler_dev_tape::raw_write): New method. * fhandler_raw.cc (fhandler_dev_raw::is_eom): New method. (fhandler_dev_raw::is_eof): New method. (fhandler_dev_raw::open): Allow setting write through option by using the O_TEXT flag as ... flag. (fhandler_dev_raw::writebuf): Remove usage of varblkop and other tape specific code. (fhandler_dev_raw::raw_read): Ditto. (fhandler_dev_raw::dup): Ditto. * fhandler_tape.cc: Rewrite tape operations entirely. Implement new tape driver classes mtinfo, mtinfo_drive and mtinfo_part. Reduce fhandler_dev_tape methods to mostly just calling appropriate mtinfo_drive methods. (mtinfo_init): New function adding the mtinfo shared memory area. * mtinfo.h: New file, containing the definition of the new tape driver classes. * shared.cc: Include mtinfo.h. (offsets): Add entry for mtinfo shared memory area. (memory_init): Call mtinfo_init. * shared_info.h (shared_locations): Add SH_MTINFO shared location. * include/cygwin/mtio.h: Change and add various comments. Add GMT_xxx macros for new generic flags. Add MT_ST_xxx bitfield definitions for MTSETDRVBUFFER ioctl. * include/cygwin/version.h: Bump API minor version number.
2004-03-26 22:43:49 +01:00
/* mtinfo.h: Defininitions for the Cygwin tape driver class.
Copyright 2004 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#define MTINFO_MAGIC 0x179b2af0
#define MTINFO_VERSION 1
/* Maximum number of supported partitions per drive. */
#define MAX_PARTITION_NUM 64
/* Maximum number of supported drives. */
#define MAX_DRIVE_NUM 8
/* Values for bookkeeping of the tape position relative to filemarks
and eod/eom. */
enum eom_val
{
no_eof,
eof_hit,
eof,
eod_hit,
eod,
eom_hit,
eom
};
enum dirty_state
{
clean,
has_read,
has_written
};
enum lock_state
{
unlocked,
lock_error,
auto_locked,
locked
};
/* Partition specific information */
class mtinfo_part
{
public:
long block; /* logical block no */
long file; /* current file no */
long fblock; /* relative block no */
bool smark; /* At setmark? */
eom_val emark; /* "end-of"-mark */
void initialize (long nblock = -1);
};
class mtinfo_drive
{
int drive;
int lasterr;
long partition;
long block;
dirty_state dirty;
lock_state lock;
TAPE_GET_DRIVE_PARAMETERS _dp;
TAPE_GET_MEDIA_PARAMETERS _mp;
bool buffer_writes;
bool two_fm;
bool fast_eom;
bool auto_lock;
bool sysv;
bool nowait;
mtinfo_part _part[MAX_PARTITION_NUM];
inline int error (const char *str)
{
if (lasterr)
debug_printf ("%s: Win32 error %d", lasterr);
return lasterr;
}
inline bool get_feature (DWORD parm)
{
return ((parm & TAPE_DRIVE_HIGH_FEATURES)
? ((_dp.FeaturesHigh & parm) != 0)
: ((_dp.FeaturesLow & parm) != 0));
}
int get_pos (HANDLE mt, long *ppartition = NULL, long *pblock = NULL);
int _set_pos (HANDLE mt, int mode, long count, int partition);
int create_partitions (HANDLE mt, long count);
int set_partition (HANDLE mt, long count);
int write_marks (HANDLE mt, int marktype, DWORD count);
int erase (HANDLE mt, int mode);
int prepare (HANDLE mt, int action, bool is_auto = false);
int set_compression (HANDLE mt, long count);
int set_blocksize (HANDLE mt, long count);
int status (HANDLE mt, struct mtget *get);
int set_options (HANDLE mt, long options);
public:
void initialize (int num, bool first_time);
int get_dp (HANDLE mt);
int get_mp (HANDLE mt);
int open (HANDLE mt);
int close (HANDLE mt, bool rewind);
int read (HANDLE mt, void *ptr, size_t &ulen);
int write (HANDLE mt, const void *ptr, size_t &len);
int ioctl (HANDLE mt, unsigned int cmd, void *buf);
int set_pos (HANDLE mt, int mode, long count, bool sfm_func);
inline bool buffered_writes (void) { return buffer_writes; }
PTAPE_GET_DRIVE_PARAMETERS dp (void) { return &_dp; }
PTAPE_GET_MEDIA_PARAMETERS mp (void) { return &_mp; }
mtinfo_part *part (int num) { return &_part[num]; }
};
class mtinfo
{
DWORD magic;
DWORD version;
mtinfo_drive _drive[MAX_DRIVE_NUM];
public:
void initialize (void);
mtinfo_drive *drive (int num) { return &_drive[num]; }
};
extern HANDLE mt_h;
extern mtinfo *mt;
extern void __stdcall mtinfo_init ();