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MiNT 1.12
/*
Copyright 1991,1992 Eric R. Smith.
Copyright 1992,1993,1994 Atari Corporation.
All rights reserved.
*/
#ifndef _filesys_h
#define _filesys_h
struct filesys; /* forward declaration */
struct devdrv; /* ditto */
struct timeout; /* and ditto */
typedef struct f_cookie {
struct filesys *fs; /* filesystem that knows about this cookie */
ushort dev; /* device info (e.g. Rwabs device number) */
ushort aux; /* extra data that the file system may want */
long index; /* this+dev uniquely identifies a file */
} fcookie;
#define TOS_NAMELEN 13
typedef struct dtabuf {
short index; /* index into arrays in the PROC struct */
long magic;
#define SVALID 0x1234fedcL /* magic for a valid search */
#define EVALID 0x5678ba90L /* magic for an exhausted search */
char dta_pat[TOS_NAMELEN+1]; /* pointer to pattern, if necessary */
char dta_sattrib; /* attributes being searched for */
/* this stuff is returned to the user */
char dta_attrib;
short dta_time;
short dta_date;
long dta_size;
char dta_name[TOS_NAMELEN+1];
} DTABUF;
/* structure for opendir/readdir/closedir */
typedef struct dirstruct {
fcookie fc; /* cookie for this directory */
ushort index; /* index of the current entry */
ushort flags; /* flags (e.g. tos or not) */
#define TOS_SEARCH 0x01
char fsstuff[60]; /* anything else the file system wants */
/* NOTE: this must be at least 45 bytes */
struct dirstruct *next; /* linked together so we can close them
on process termination */
} DIR;
/* structure for getxattr */
typedef struct xattr {
ushort mode;
/* file types */
#define S_IFMT 0170000 /* mask to select file type */
#define S_IFCHR 0020000 /* BIOS special file */
#define S_IFDIR 0040000 /* directory file */
#define S_IFREG 0100000 /* regular file */
#define S_IFIFO 0120000 /* FIFO */
#define S_IFMEM 0140000 /* memory region or process */
#define S_IFLNK 0160000 /* symbolic link */
/* special bits: setuid, setgid, sticky bit */
#define S_ISUID 04000
#define S_ISGID 02000
#define S_ISVTX 01000
/* file access modes for user, group, and other*/
#define S_IRUSR 0400
#define S_IWUSR 0200
#define S_IXUSR 0100
#define S_IRGRP 0040
#define S_IWGRP 0020
#define S_IXGRP 0010
#define S_IROTH 0004
#define S_IWOTH 0002
#define S_IXOTH 0001
#define DEFAULT_DIRMODE (0777)
#define DEFAULT_MODE (0666)
long index;
ushort dev;
ushort rdev; /* "real" device */
ushort nlink;
ushort uid;
ushort gid;
long size;
long blksize;
long nblocks;
short mtime, mdate;
short atime, adate;
short ctime, cdate;
short attr;
/* defines for TOS attribute bytes */
#ifndef FA_RDONLY
#define FA_RDONLY 0x01
#define FA_HIDDEN 0x02
#define FA_SYSTEM 0x04
#define FA_LABEL 0x08
#define FA_DIR 0x10
#define FA_CHANGED 0x20
#endif
short reserved2;
long reserved3[2];
} XATTR;
typedef struct fileptr {
short links; /* number of copies of this descriptor */
ushort flags; /* file open mode and other file flags */
long pos; /* position in file */
long devinfo; /* device driver specific info */
fcookie fc; /* file system cookie for this file */
struct devdrv *dev; /* device driver that knows how to deal with this */
struct fileptr *next; /* link to next fileptr for this file */
} FILEPTR;
struct flock {
short l_type; /* type of lock */
#define F_RDLCK 0
#define F_WRLCK 1
#define F_UNLCK 3
short l_whence; /* SEEK_SET, SEEK_CUR, SEEK_END */
long l_start; /* start of locked region */
long l_len; /* length of locked region */
short l_pid; /* pid of locking process
(F_GETLK only) */
};
/* structure for internal kernel locks */
typedef struct ilock {
struct flock l; /* the actual lock */
struct ilock *next; /* next lock in the list */
long reserved[4]; /* reserved for future expansion */
} LOCK;
typedef struct devdrv {
long ARGS_ON_STACK (*open) P_((FILEPTR *f));
long ARGS_ON_STACK (*write) P_((FILEPTR *f, const char *buf, long bytes));
long ARGS_ON_STACK (*read) P_((FILEPTR *f, char *buf, long bytes));
long ARGS_ON_STACK (*lseek) P_((FILEPTR *f, long where, int whence));
long ARGS_ON_STACK (*ioctl) P_((FILEPTR *f, int mode, void *buf));
long ARGS_ON_STACK (*datime) P_((FILEPTR *f, short *timeptr, int rwflag));
long ARGS_ON_STACK (*close) P_((FILEPTR *f, int pid));
long ARGS_ON_STACK (*select) P_((FILEPTR *f, long proc, int mode));
void ARGS_ON_STACK (*unselect) P_((FILEPTR *f, long proc, int mode));
/* extensions, check dev_descr.drvsize (size of DEVDRV struct) before calling:
* fast RAW tty byte io */
long ARGS_ON_STACK (*writeb) P_((FILEPTR *f, const char *buf, long bytes));
long ARGS_ON_STACK (*readb) P_((FILEPTR *f, char *buf, long bytes));
/* what about: scatter/gather io for DMA devices...
* long ARGS_ON_STACK (*writev) P_((FILEPTR *f, const struct iovec *iov, long cnt));
* long ARGS_ON_STACK (*readv) P_((FILEPTR *f, const struct iovec *iov, long cnt));
*/
} DEVDRV;
typedef struct filesys {
struct filesys *next; /* link to next file system on chain */
long fsflags;
#define FS_KNOPARSE 0x01 /* kernel shouldn't do parsing */
#define FS_CASESENSITIVE 0x02 /* file names are case sensitive */
#define FS_NOXBIT 0x04 /* if a file can be read, it can be executed */
#define FS_LONGPATH 0x08 /* file system understands "size" argument to
"getname" */
long ARGS_ON_STACK (*root) P_((int drv, fcookie *fc));
long ARGS_ON_STACK (*lookup) P_((fcookie *dir, const char *name, fcookie *fc));
long ARGS_ON_STACK (*creat) P_((fcookie *dir, const char *name, unsigned mode,
int attrib, fcookie *fc));
DEVDRV * ARGS_ON_STACK (*getdev) P_((fcookie *fc, long *devspecial));
long ARGS_ON_STACK (*getxattr) P_((fcookie *file, XATTR *xattr));
long ARGS_ON_STACK (*chattr) P_((fcookie *file, int attr));
long ARGS_ON_STACK (*chown) P_((fcookie *file, int uid, int gid));
long ARGS_ON_STACK (*chmode) P_((fcookie *file, unsigned mode));
long ARGS_ON_STACK (*mkdir) P_((fcookie *dir, const char *name, unsigned mode));
long ARGS_ON_STACK (*rmdir) P_((fcookie *dir, const char *name));
long ARGS_ON_STACK (*remove) P_((fcookie *dir, const char *name));
long ARGS_ON_STACK (*getname) P_((fcookie *relto, fcookie *dir,
char *pathname, int size));
long ARGS_ON_STACK (*rename) P_((fcookie *olddir, char *oldname,
fcookie *newdir, const char *newname));
long ARGS_ON_STACK (*opendir) P_((DIR *dirh, int tosflag));
long ARGS_ON_STACK (*readdir) P_((DIR *dirh, char *name, int namelen, fcookie *fc));
long ARGS_ON_STACK (*rewinddir) P_((DIR *dirh));
long ARGS_ON_STACK (*closedir) P_((DIR *dirh));
long ARGS_ON_STACK (*pathconf) P_((fcookie *dir, int which));
long ARGS_ON_STACK (*dfree) P_((fcookie *dir, long *buf));
long ARGS_ON_STACK (*writelabel) P_((fcookie *dir, const char *name));
long ARGS_ON_STACK (*readlabel) P_((fcookie *dir, char *name, int namelen));
long ARGS_ON_STACK (*symlink) P_((fcookie *dir, const char *name, const char *to));
long ARGS_ON_STACK (*readlink) P_((fcookie *dir, char *buf, int len));
long ARGS_ON_STACK (*hardlink) P_((fcookie *fromdir, const char *fromname,
fcookie *todir, const char *toname));
long ARGS_ON_STACK (*fscntl) P_((fcookie *dir, const char *name, int cmd, long arg));
long ARGS_ON_STACK (*dskchng) P_((int drv));
long ARGS_ON_STACK (*release) P_((fcookie *));
long ARGS_ON_STACK (*dupcookie) P_((fcookie *new, fcookie *old));
} FILESYS;
/*
* this is the structure passed to loaded file systems to tell them
* about the kernel
*/
struct kerinfo {
short maj_version; /* kernel version number */
short min_version; /* minor kernel version number */
ushort default_perm; /* default file permissions */
short reserved1; /* room for expansion */
/* OS functions */
Func *bios_tab; /* pointer to the BIOS entry points */
Func *dos_tab; /* pointer to the GEMDOS entry points */
/* media change vector */
void ARGS_ON_STACK (*drvchng) P_((unsigned));
/* Debugging stuff */
void ARGS_ON_STACK (*trace) P_((const char *, ...));
void ARGS_ON_STACK (*debug) P_((const char *, ...));
void ARGS_ON_STACK (*alert) P_((const char *, ...));
EXITING void ARGS_ON_STACK (*fatal) P_((const char *, ...)) NORETURN;
/* memory allocation functions */
void * ARGS_ON_STACK (*kmalloc) P_((long));
void ARGS_ON_STACK (*kfree) P_((void *));
void * ARGS_ON_STACK (*umalloc) P_((long));
void ARGS_ON_STACK (*ufree) P_((void *));
/* utility functions for string manipulation */
int ARGS_ON_STACK (*strnicmp) P_((const char *, const char *, int));
int ARGS_ON_STACK (*stricmp) P_((const char *, const char *));
char * ARGS_ON_STACK (*strlwr) P_((char *));
char * ARGS_ON_STACK (*strupr) P_((char *));
int ARGS_ON_STACK (*sprintf) P_((char *, const char *, ...));
/* utility functions for manipulating time */
void ARGS_ON_STACK (*millis_time) P_((unsigned long, short *));
long ARGS_ON_STACK (*unixtim) P_((unsigned, unsigned));
long ARGS_ON_STACK (*dostim) P_((long));
/* utility functions for dealing with pauses, or for putting processes
* to sleep
*/
void ARGS_ON_STACK (*nap) P_((unsigned));
int ARGS_ON_STACK (*sleep) P_((int que, long cond));
void ARGS_ON_STACK (*wake) P_((int que, long cond));
void ARGS_ON_STACK (*wakeselect) P_((long param));
/* file system utility functions */
int ARGS_ON_STACK (*denyshare) P_((FILEPTR *, FILEPTR *));
LOCK * ARGS_ON_STACK (*denylock) P_((LOCK *, LOCK *));
/* functions for adding/cancelling timeouts */
struct timeout * ARGS_ON_STACK (*addtimeout) P_((long, void (*)()));
void ARGS_ON_STACK (*canceltimeout) P_((struct timeout *));
struct timeout * ARGS_ON_STACK (*addroottimeout) P_((long, void (*)(), short));
void ARGS_ON_STACK (*cancelroottimeout) P_((struct timeout *));
/* miscellaneous other things */
long ARGS_ON_STACK (*ikill) P_((int, int));
void ARGS_ON_STACK (*iwake) P_((int que, long cond, short pid));
/* reserved for future use */
long res2[3];
};
/* flags for open() modes */
#define O_RWMODE 0x03 /* isolates file read/write mode */
# define O_RDONLY 0x00
# define O_WRONLY 0x01
# define O_RDWR 0x02
# define O_EXEC 0x03 /* execute file; used by kernel only */
/* 0x04 is for future expansion */
#define O_APPEND 0x08 /* all writes go to end of file */
#define O_SHMODE 0x70 /* isolates file sharing mode */
# define O_COMPAT 0x00 /* compatibility mode */
# define O_DENYRW 0x10 /* deny both read and write access */
# define O_DENYW 0x20 /* deny write access to others */
# define O_DENYR 0x30 /* deny read access to others */
# define O_DENYNONE 0x40 /* don't deny any access to others */
#define O_NOINHERIT 0x80 /* private file (not passed to child) */
#define O_NDELAY 0x100 /* don't block for i/o on this file */
#define O_CREAT 0x200 /* create file if it doesn't exist */
#define O_TRUNC 0x400 /* truncate file to 0 bytes if it does exist */
#define O_EXCL 0x800 /* fail open if file exists */
#define O_USER 0x0fff /* isolates user-settable flag bits */
#define O_GLOBAL 0x1000 /* for opening a global file */
/* kernel mode bits -- the user can't set these! */
#define O_TTY 0x2000
#define O_HEAD 0x4000
#define O_LOCK 0x8000
/* GEMDOS file attributes */
/* macros to be applied to FILEPTRS to determine their type */
#define is_terminal(f) (f->flags & O_TTY)
/* lseek() origins */
#define SEEK_SET 0 /* from beginning of file */
#define SEEK_CUR 1 /* from current location */
#define SEEK_END 2 /* from end of file */
/* The requests for Dpathconf() */
#define DP_IOPEN 0 /* internal limit on # of open files */
#define DP_MAXLINKS 1 /* max number of hard links to a file */
#define DP_PATHMAX 2 /* max path name length */
#define DP_NAMEMAX 3 /* max length of an individual file name */
#define DP_ATOMIC 4 /* # of bytes that can be written atomically */
#define DP_TRUNC 5 /* file name truncation behavior */
# define DP_NOTRUNC 0 /* long filenames give an error */
# define DP_AUTOTRUNC 1 /* long filenames truncated */
# define DP_DOSTRUNC 2 /* DOS truncation rules in effect */
#define DP_CASE 6
# define DP_CASESENS 0 /* case sensitive */
# define DP_CASECONV 1 /* case always converted */
# define DP_CASEINSENS 2 /* case insensitive, preserved */
#define DP_MODEATTR 7
# define DP_ATTRBITS 0x000000ffL /* mask for valid TOS attribs */
# define DP_MODEBITS 0x000fff00L /* mask for valid Unix file modes */
# define DP_FILETYPS 0xfff00000L /* mask for valid file types */
# define DP_FT_DIR 0x00100000L /* directories (always if . is there) */
# define DP_FT_CHR 0x00200000L /* character special files */
# define DP_FT_BLK 0x00400000L /* block special files, currently unused */
# define DP_FT_REG 0x00800000L /* regular files */
# define DP_FT_LNK 0x01000000L /* symbolic links */
# define DP_FT_SOCK 0x02000000L /* sockets, currently unused */
# define DP_FT_FIFO 0x04000000L /* pipes */
# define DP_FT_MEM 0x08000000L /* shared memory or proc files */
#define DP_XATTRFIELDS 8
# define DP_INDEX 0x0001
# define DP_DEV 0x0002
# define DP_RDEV 0x0004
# define DP_NLINK 0x0008
# define DP_UID 0x0010
# define DP_GID 0x0020
# define DP_BLKSIZE 0x0040
# define DP_SIZE 0x0080
# define DP_NBLOCKS 0x0100
# define DP_ATIME 0x0200
# define DP_CTIME 0x0400
# define DP_MTIME 0x0800
#define DP_MAXREQ 8 /* highest legal request */
/* Dpathconf and Sysconf return this when a value is not limited
(or is limited only by available memory) */
#define UNLIMITED 0x7fffffffL
/* various character constants and defines for TTY's */
#define MiNTEOF 0x0000ff1a /* 1a == ^Z */
/* defines for tty_read */
#define RAW 0
#define COOKED 0x1
#define NOECHO 0
#define ECHO 0x2
#define ESCSEQ 0x04 /* cursor keys, etc. get escape sequences */
/* constants for Fcntl calls */
#define F_DUPFD 0 /* handled by kernel */
#define F_GETFD 1 /* handled by kernel */
#define F_SETFD 2 /* handled by kernel */
# define FD_CLOEXEC 1 /* close on exec flag */
#define F_GETFL 3 /* handled by kernel */
#define F_SETFL 4 /* handled by kernel */
#define F_GETLK 5
#define F_SETLK 6
#define F_SETLKW 7
/* more constants for various Fcntl's */
#define FSTAT (('F'<< 8) | 0) /* handled by kernel */
#define FIONREAD (('F'<< 8) | 1)
#define FIONWRITE (('F'<< 8) | 2)
#define FIOEXCEPT (('F'<< 8) | 5)
#define TIOCGETP (('T'<< 8) | 0)
#define TIOCSETN (('T'<< 8) | 1)
#define TIOCGETC (('T'<< 8) | 2)
#define TIOCSETC (('T'<< 8) | 3)
#define TIOCGLTC (('T'<< 8) | 4)
#define TIOCSLTC (('T'<< 8) | 5)
#define TIOCGPGRP (('T'<< 8) | 6)
#define TIOCSPGRP (('T'<< 8) | 7)
#define TIOCFLUSH (('T'<< 8) | 8)
#define TIOCSTOP (('T'<< 8) | 9)
#define TIOCSTART (('T'<< 8) | 10)
#define TIOCGWINSZ (('T'<< 8) | 11)
#define TIOCSWINSZ (('T'<< 8) | 12)
#define TIOCGXKEY (('T'<< 8) | 13)
#define TIOCSXKEY (('T'<< 8) | 14)
#define TIOCIBAUD (('T'<< 8) | 18)
#define TIOCOBAUD (('T'<< 8) | 19)
#define TIOCCBRK (('T'<< 8) | 20)
#define TIOCSBRK (('T'<< 8) | 21)
#define TIOCGFLAGS (('T'<< 8) | 22)
#define TIOCSFLAGS (('T'<< 8) | 23)
#define TIOCOUTQ (('T'<< 8) | 24)
#define TIOCSETP (('T'<< 8) | 25)
#define TIOCHPCL (('T'<< 8) | 26)
#define TIOCCAR (('T'<< 8) | 27)
#define TIOCNCAR (('T'<< 8) | 28)
#define TIOCWONLINE (('T'<< 8) | 29)
#define TIOCSFLAGSB (('T'<< 8) | 30)
#define TIOCGSTATE (('T'<< 8) | 31)
#define TIOCSSTATEB (('T'<< 8) | 32)
#define TIOCGVMIN (('T'<< 8) | 33)
#define TIOCSVMIN (('T'<< 8) | 34)
/* cursor control Fcntls:
* NOTE THAT THESE MUST BE TOGETHER
*/
#define TCURSOFF (('c'<< 8) | 0)
#define TCURSON (('c'<< 8) | 1)
#define TCURSBLINK (('c'<< 8) | 2)
#define TCURSSTEADY (('c'<< 8) | 3)
#define TCURSSRATE (('c'<< 8) | 4)
#define TCURSGRATE (('c'<< 8) | 5)
/* process stuff */
#define PPROCADDR (('P'<< 8) | 1)
#define PBASEADDR (('P'<< 8) | 2)
#define PCTXTSIZE (('P'<< 8) | 3)
#define PSETFLAGS (('P'<< 8) | 4)
#define PGETFLAGS (('P'<< 8) | 5)
#define PTRACESFLAGS (('P'<< 8) | 6)
#define PTRACEGFLAGS (('P'<< 8) | 7)
# define P_ENABLE (1 << 0) /* enable tracing */
#ifdef NOTYETDEFINED
# define P_DOS (1 << 1) /* trace DOS calls - unimplemented */
# define P_BIOS (1 << 2) /* trace BIOS calls - unimplemented */
# define P_XBIOS (1 << 3) /* trace XBIOS calls - unimplemented */
#endif
#define PTRACEGO (('P'<< 8) | 8) /* these 4 must be together */
#define PTRACEFLOW (('P'<< 8) | 9)
#define PTRACESTEP (('P'<< 8) | 10)
#define PTRACE11 (('P'<< 8) | 11)
#define PLOADINFO (('P'<< 8) | 12)
#define PFSTAT (('P'<< 8) | 13)
struct ploadinfo {
/* passed */
short fnamelen;
/* returned */
char *cmdlin, *fname;
};
#define SHMGETBLK (('M'<< 8) | 0)
#define SHMSETBLK (('M'<< 8) | 1)
/* terminal control constants (tty.sg_flags) */
#define T_CRMOD 0x0001
#define T_CBREAK 0x0002
#define T_ECHO 0x0004
/* #define T_XTABS 0x0008 unimplemented*/
#define T_RAW 0x0010
/* #define T_LCASE 0x0020 unimplemented */
#define T_NOFLSH 0x0040 /* don't flush buffer when signals
are received */
#define T_TOS 0x0080
#define T_TOSTOP 0x0100
#define T_XKEY 0x0200 /* Fread returns escape sequences for
cursor keys, etc. */
#define T_ECHOCTL 0x0400 /* echo ctl chars as ^x */
/* 0x0800 still available */
#define T_TANDEM 0x1000
#define T_RTSCTS 0x2000
#define T_EVENP 0x4000 /* EVENP and ODDP are mutually exclusive */
#define T_ODDP 0x8000
#define TF_FLAGS 0xF000
/* some flags for TIOC[GS]FLAGS */
#define TF_CAR 0x800 /* nonlocal mode, require carrier */
#define TF_NLOCAL TF_CAR
#define TF_BRKINT 0x80 /* allow breaks interrupt (like ^C) */
#define TF_STOPBITS 0x0003
#define TF_1STOP 0x0001
#define TF_15STOP 0x0002
#define TF_2STOP 0x0003
#define TF_CHARBITS 0x000C
#define TF_8BIT 0
#define TF_7BIT 0x4
#define TF_6BIT 0x8
#define TF_5BIT 0xC
/* the following are terminal status flags (tty.state) */
/* (the low byte of tty.state indicates a part of an escape sequence still
* hasn't been read by Fread, and is an index into that escape sequence)
*/
#define TS_ESC 0x00ff
#define TS_BLIND 0x800 /* tty is `blind' i.e. has no carrier
(cleared in local mode) */
#define TS_HOLD 0x1000 /* hold (e.g. ^S/^Q) */
#define TS_HPCL 0x4000 /* hang up on close */
#define TS_COOKED 0x8000 /* interpret control chars */
/* structures for terminals */
struct tchars {
char t_intrc;
char t_quitc;
char t_startc;
char t_stopc;
char t_eofc;
char t_brkc;
};
struct ltchars {
char t_suspc;
char t_dsuspc;
char t_rprntc;
char t_flushc;
char t_werasc;
char t_lnextc;
};
struct sgttyb {
char sg_ispeed;
char sg_ospeed;
char sg_erase;
char sg_kill;
ushort sg_flags;
};
struct winsize {
short ws_row;
short ws_col;
short ws_xpixel;
short ws_ypixel;
};
struct xkey {
short xk_num;
char xk_def[8];
};
struct tty {
short pgrp; /* process group of terminal */
short state; /* terminal status, e.g. stopped */
short use_cnt; /* number of times terminal is open */
short aux_cnt; /* number of times terminal is open as
/dev/aux */
struct sgttyb sg;
struct tchars tc;
struct ltchars ltc;
struct winsize wsiz;
long rsel; /* selecting process for read */
long wsel; /* selecting process for write */
char *xkey; /* extended keyboard table */
long hup_ospeed; /* saved ospeed while hanging up */
unsigned short vmin, vtime; /* min chars, timeout for RAW reads */
long resrvd[1]; /* for future expansion */
};
struct bios_tty {
IOREC_T *irec; /* From XBIOS ... */
long *rsel; /* pointer to field in tty struct */
IOREC_T *orec; /* Same, for output... */
long *wsel;
long ispeed, ospeed; /* last speeds set */
long *baudmap, maxbaud; /* Rsconf baud word <-> bps table */
short *baudx;
struct tty *tty;
long bticks; /* when to take a break for real */
long vticks; /* ..check read buf next (vmin/speed) */
char clocal, brkint; /* flags: local mode, break == ^C */
short tosfd; /* if != EUNDEV: fd to pass Fcntl()s */
short bdev, unused1;
};
/* Dcntl constants and types */
#define DEV_NEWTTY 0xde00
#define DEV_NEWBIOS 0xde01
#define DEV_INSTALL 0xde02
struct dev_descr {
DEVDRV *driver;
short dinfo;
short flags;
struct tty *tty;
long drvsize; /* size of DEVDRV struct */
long reserved[3];
};
#define FS_INSTALL 0xf001 /* let the kernel know about the file system */
#define FS_MOUNT 0xf002 /* make a new directory for a file system */
#define FS_UNMOUNT 0xf003 /* remove a directory for a file system */
#define FS_UNINSTALL 0xf004 /* remove a file system from the list */
struct fs_descr
{
FILESYS *file_system;
short dev_no; /* this is filled in by MiNT if arg == FS_MOUNT*/
long flags;
long reserved[4];
};
/* number of BIOS drives */
#define NUM_DRIVES 32
#define BIOSDRV (NUM_DRIVES)
#define PIPEDRV (NUM_DRIVES+1)
#define PROCDRV (NUM_DRIVES+2)
#define SHMDRV (NUM_DRIVES+3)
#define UNI_NUM_DRVS (NUM_DRIVES+4)
#define UNIDRV ('U'-'A')
#define PSEUDODRVS ((1L<<UNIDRV))
/* various fields for the "rdev" device numbers */
#define BIOS_DRIVE_RDEV 0x0000
#define BIOS_RDEV 0x0100
#define FAKE_RDEV 0x0200
#define PIPE_RDEV 0x7e00
#define UNK_RDEV 0x7f00
#define PROC_RDEV_BASE 0xa000
#ifndef GENMAGIC
/* external variables */
extern FILESYS *drives[NUM_DRIVES];
extern struct tty default_tty;
#define follow_links ((char *)-1L)
#endif
/* internal bios file structure */
#define BNAME_MAX 13
struct bios_file {
char name[BNAME_MAX+1]; /* device name */
DEVDRV *device; /* device driver for device */
short private; /* extra info for device driver */
ushort flags; /* flags for device open */
struct tty *tty; /* tty structure (if appropriate) */
struct bios_file *next;
short lockpid; /* owner of the lock */
XATTR xattr; /* guess what... */
long drvsize; /* size of DEVDRV struct */
};
#endif /* _filesys_h */
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