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rt-thread/components/lwp/terminal/bsd_porting.h

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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-11-13 Shell Add compatible layer for FreeBSD
*/
#ifndef __LWP_TTY_BSD_PORTING_H__
#define __LWP_TTY_BSD_PORTING_H__
#include <rtthread.h>
#include <lwp_internal.h>
#define _KERNEL
#ifndef __unused
#define __unused __attribute__((__unused__))
#endif
/* functionability of bsd tty layer */
#if 0
#define USING_BSD_HOOK
#endif
/* Only for devfs d_close() flags. */
#define FLASTCLOSE O_DIRECTORY
#define FREVOKE 0x00200000
/*
* Output flags - software output processing
*/
#if !((OPOST | OLCUC | ONLCR) & 0x8)
#define ONOEOT 0x0008 /* discard EOT's (^D) on output) */
#endif
/*
* Kernel encoding of open mode; separate read and write bits that are
* independently testable: 1 greater than the above.
*
* XXX
* FREAD and FWRITE are excluded from the #ifdef _KERNEL so that TIOCFLUSH,
* which was documented to use FREAD/FWRITE, continues to work.
*/
#define FREAD 0x0001
#define FWRITE 0x0002
/*
* Flags to memory allocation functions.
*/
#define M_NOWAIT 0x0001 /* do not block */
#define M_WAITOK 0x0002 /* ok to block */
#define M_NORECLAIM 0x0080 /* do not reclaim after failure */
#define M_ZERO 0x0100 /* bzero the allocation */
#define M_NOVM 0x0200 /* don't ask VM for pages */
#define M_USE_RESERVE 0x0400 /* can alloc out of reserve memory */
#define M_NODUMP 0x0800 /* don't dump pages in this allocation */
#define M_FIRSTFIT 0x1000 /* only for vmem, fast fit */
#define M_BESTFIT 0x2000 /* only for vmem, low fragmentation */
#define M_EXEC 0x4000 /* allocate executable space */
#define M_NEXTFIT 0x8000 /* only for vmem, follow cursor */
#define M_VERSION 2020110501
/*
* The INVARIANTS-enabled mtx_assert() functionality.
*
* The constants need to be defined for INVARIANT_SUPPORT infrastructure
* support as _mtx_assert() itself uses them and the latter implies that
* _mtx_assert() must build.
*/
#define MA_OWNED (1)
#define MA_NOTOWNED (2)
#define MA_RECURSED (4)
#define MA_NOTRECURSED (8)
/*
* Indentification of modem control signals. These definitions match
* the TIOCMGET definitions in <sys/ttycom.h> shifted a bit down, and
* that identity is enforced with CTASSERT at the bottom of kern/tty.c
* Both the modem bits and delta bits must fit in 16 bit.
*/
#define SER_DTR 0x0001 /* data terminal ready */
#define SER_RTS 0x0002 /* request to send */
#define SER_STX 0x0004 /* secondary transmit */
#define SER_SRX 0x0008 /* secondary receive */
#define SER_CTS 0x0010 /* clear to send */
#define SER_DCD 0x0020 /* data carrier detect */
#define SER_RI 0x0040 /* ring indicate */
#define SER_DSR 0x0080 /* data set ready */
#define SER_MASK_STATE 0x00ff
/*
* Flags for ioflag. (high 16 bits used to ask for read-ahead and
* help with write clustering)
* NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h
*/
#if 0
#define IO_UNIT 0x0001 /* do I/O as atomic unit */
#define IO_APPEND 0x0002 /* append write to end */
#endif /* not porting */
#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */
#if 0
#define IO_NODELOCKED 0x0008 /* underlying node already locked */
#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */
#define IO_VMIO 0x0020 /* data already in VMIO space */
#define IO_INVAL 0x0040 /* invalidate after I/O */
#define IO_SYNC 0x0080 /* do I/O synchronously */
#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
#define IO_NOREUSE 0x0200 /* VMIO data won't be reused */
#define IO_EXT 0x0400 /* operate on external attributes */
#define IO_NORMAL 0x0800 /* operate on regular data */
#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */
#define IO_BUFLOCKED 0x2000 /* ffs flag; indir buf is locked */
#define IO_RANGELOCKED 0x4000 /* range locked */
#define IO_DATASYNC 0x8000 /* do only data I/O synchronously */
#define IO_SEQMAX 0x7F /* seq heuristic max value */
#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
#endif /* not porting */
/** Used to distinguish between normal, callout, lock and init devices.
* Note: this is not used in smart system.
*/
#define TTYUNIT_INIT 0x1
#define TTYUNIT_LOCK 0x2
#define TTYUNIT_CALLOUT 0x4
/*
* TTY privileges.
*/
#define PRIV_TTY_CONSOLE 250 /* Set console to tty. */
#define PRIV_TTY_DRAINWAIT 251 /* Set tty drain wait time. */
#define PRIV_TTY_DTRWAIT 252 /* Set DTR wait on tty. */
#define PRIV_TTY_EXCLUSIVE 253 /* Override tty exclusive flag. */
#define _PRIV_TTY_PRISON 254 /* Removed. */
#define PRIV_TTY_STI 255 /* Simulate input on another tty. */
#define PRIV_TTY_SETA 256 /* Set tty termios structure. */
#define MPASS(ex) RT_ASSERT(ex)
#if !defined(MIN)
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
#if !defined(MAX)
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
#define curthread rt_thread_self()
#ifdef USING_BSD_HOOK
#define ttyhook_hashook(tp, hook) \
((tp)->t_hook != NULL && (tp)->t_hook->th_##hook != NULL)
#else
#define ttyhook_hashook(tp, hook) (RT_FALSE)
#endif
/* condvar API */
#include <rtdevice.h>
#define cv_init(cvp, name) rt_condvar_init(cvp, name)
#define cv_destroy(cvp) rt_condvar_detach(cvp)
#define cv_wait(cvp, mp) \
rt_condvar_timedwait(cvp, mp, RT_KILLABLE, RT_WAITING_FOREVER)
#define cv_wait_sig(cvp, mp) \
rt_condvar_timedwait(cvp, mp, RT_INTERRUPTIBLE, RT_WAITING_FOREVER)
#define cv_signal(cvp) rt_condvar_signal(cvp)
#define cv_broadcast(cvp) rt_condvar_broadcast(cvp)
#define cv_timedwait(cvp, mp, t) rt_condvar_timedwait(cvp, mp, RT_KILLABLE, t)
#define cv_timedwait_sig(cvp, mp, t) \
rt_condvar_timedwait(cvp, mp, RT_INTERRUPTIBLE, t)
struct lwp_tty;
struct uio;
/* TODO: just a place holder since devfs is not capable of doing this currently
*/
struct file
{
};
typedef rt_base_t sbintime_t;
typedef rt_ubase_t vm_offset_t;
typedef rt_base_t vm_ooffset_t;
typedef rt_ubase_t vm_paddr_t;
typedef rt_ubase_t vm_pindex_t;
typedef rt_ubase_t vm_size_t;
typedef char *rt_caddr_t;
/*
* The exact set of memory attributes is machine dependent. However,
* every machine is required to define VM_MEMATTR_DEFAULT and
* VM_MEMATTR_UNCACHEABLE.
*/
typedef char vm_memattr_t; /* memory attribute codes */
typedef int d_open_t(struct lwp_tty *tp, int oflags, int devtype,
struct rt_thread *td);
typedef int d_fdopen_t(struct lwp_tty *tp, int oflags, struct rt_thread *td,
struct file *fp);
typedef int d_close_t(struct lwp_tty *tp, int fflag, int devtype,
struct rt_thread *td);
#ifdef USING_BSD_DEVICE_STRATEGY
typedef void d_strategy_t(struct bio *bp);
#endif
typedef int d_ioctl_t(struct lwp_tty *tp, rt_ubase_t cmd, rt_caddr_t data,
int fflag, struct rt_thread *td);
typedef int d_read_t(struct lwp_tty *tp, struct uio *uio, int ioflag);
typedef int d_write_t(struct lwp_tty *tp, struct uio *uio, int ioflag);
typedef int d_poll_t(struct lwp_tty *tp, rt_pollreq_t *req,
struct rt_thread *td);
#ifdef USING_BSD_KNOTE
typedef int d_kqfilter_t(struct lwp_tty *tp, struct knote *kn);
#endif /* USING_BSD_KNOTE */
typedef int d_mmap_t(struct lwp_tty *tp, vm_ooffset_t offset, vm_paddr_t *paddr,
int nprot, vm_memattr_t *memattr);
#ifdef USING_BSD_MMAP_SINGLE
typedef int d_mmap_single_t(struct cdev *cdev, vm_ooffset_t *offset,
vm_size_t size, struct vm_object **object,
int nprot);
#endif /* USING_BSD_MMAP_SINGLE */
typedef void d_purge_t(struct lwp_tty *tp);
/*
* Character device switch table
*/
struct cdevsw
{
#ifdef USING_BSD_RAW_CDEVSW
int d_version;
u_int d_flags;
const char *d_name;
#endif /* USING_BSD_RAW_CDEVSW */
d_open_t *d_open;
d_fdopen_t *d_fdopen;
d_close_t *d_close;
d_read_t *d_read;
d_write_t *d_write;
d_ioctl_t *d_ioctl;
d_poll_t *d_poll;
d_mmap_t *d_mmap;
#ifdef USING_BSD_DEVICE_STRATEGY
d_strategy_t *d_strategy;
#endif /* USING_BSD_DEVICE_STRATEGY */
#ifdef USING_BSD_RAW_CDEVSW
void *d_spare0;
d_kqfilter_t *d_kqfilter;
d_purge_t *d_purge;
d_mmap_single_t *d_mmap_single;
int32_t d_spare1[3];
void *d_spare2[3];
/* These fields should not be messed with by drivers */
LIST_HEAD(, cdev) d_devs;
int d_spare3;
union
{
struct cdevsw *gianttrick;
SLIST_ENTRY(cdevsw) postfree_list;
} __d_giant;
#endif
};
struct iovec
{
void *iov_base; /* Base address. */
size_t iov_len; /* Length. */
};
enum uio_rw
{
UIO_READ,
UIO_WRITE
};
struct uio
{
struct iovec *uio_iov; /* scatter/gather list */
int uio_iovcnt; /* length of scatter/gather list */
off_t uio_offset; /* offset in target object */
ssize_t uio_resid; /* remaining bytes to process */
#ifdef USING_BSD_UIO
enum uio_seg uio_segflg; /* address space */
#endif
enum uio_rw uio_rw; /* operation */
#ifdef USING_BSD_UIO
struct rt_thread *uio_td; /* owner */
#endif /* USING_BSD_UIO */
};
#include <lwp_user_mm.h>
rt_inline int uiomove(void *operand, int n, struct uio *uio)
{
switch (uio->uio_rw)
{
case UIO_READ:
memcpy(uio->uio_iov->iov_base, operand, n);
break;
case UIO_WRITE:
memcpy(operand, uio->uio_iov->iov_base, n);
break;
default:
return -1;
}
uio->uio_iov->iov_base += n;
uio->uio_iov->iov_len--;
uio->uio_offset += n;
uio->uio_resid -= n;
return 0;
}
/* privileges checking: 0 if okay */
rt_inline int priv_check(struct rt_thread *td, int priv)
{
return 0;
}
/* Disable console redirection to a tty. */
rt_inline int constty_clear(struct lwp_tty *tp)
{
// rt_kprintf("\nTODO: %s unimplemented!\n", __func__);
return 0;
}
rt_inline int constty_set(struct lwp_tty *tp)
{
// rt_kprintf("\nTODO: %s unimplemented!\n", __func__);
return 0;
}
/**
* UMA (Universal Memory Allocator)
*/
#define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */
typedef int (*uma_ctor)(void *mem, int size, void *arg, int flags);
typedef void (*uma_dtor)(void *mem, int size, void *arg);
typedef int (*uma_init)(void *mem, int size, int flags);
typedef void (*uma_fini)(void *mem, int size);
struct uma_zone
{
char *name;
int align;
int size;
};
/* Opaque type used as a handle to the zone */
typedef struct uma_zone *uma_zone_t;
rt_inline uma_zone_t uma_zcreate(char *name, int size, uma_ctor ctor,
uma_dtor dtor, uma_init zinit, uma_fini zfini,
int align, uint16_t flags)
{
uma_zone_t zone = rt_malloc(sizeof(struct uma_zone));
if (zone)
{
RT_ASSERT(ctor == RT_NULL);
RT_ASSERT(dtor == RT_NULL);
RT_ASSERT(zinit == RT_NULL);
RT_ASSERT(zfini == RT_NULL);
zone->size = size;
zone->name = name;
zone->align = align;
}
return zone;
}
rt_inline void *uma_zalloc(uma_zone_t zone, int flags)
{
void *buf = rt_malloc_align(zone->size, zone->align + 1);
if (buf)
rt_memset(buf, 0, sizeof(zone->size));
return buf;
}
rt_inline void uma_zfree(uma_zone_t zone, void *item)
{
rt_free_align(item);
}
/**
* bsd type of speed to linux type.
* Note: with switch blocks, compiler can generate the optimized version for us
*/
#include <termios.h>
rt_inline long bsd_speed_to_integer(speed_t speed)
{
long speed_value;
switch (speed)
{
case B0:
speed_value = 0;
break;
case B50:
speed_value = 50;
break;
case B75:
speed_value = 75;
break;
case B110:
speed_value = 110;
break;
case B134:
speed_value = 134;
break;
case B150:
speed_value = 150;
break;
case B200:
speed_value = 200;
break;
case B300:
speed_value = 300;
break;
case B600:
speed_value = 600;
break;
case B1200:
speed_value = 1200;
break;
case B1800:
speed_value = 1800;
break;
case B2400:
speed_value = 2400;
break;
case B4800:
speed_value = 4800;
break;
case B9600:
speed_value = 9600;
break;
case B19200:
speed_value = 19200;
break;
case B38400:
speed_value = 38400;
break;
case B57600:
speed_value = 57600;
break;
case B115200:
speed_value = 115200;
break;
case B230400:
speed_value = 230400;
break;
case B460800:
speed_value = 460800;
break;
case B500000:
speed_value = 500000;
break;
case B576000:
speed_value = 576000;
break;
case B921600:
speed_value = 921600;
break;
case B1000000:
speed_value = 1000000;
break;
case B1152000:
speed_value = 1152000;
break;
case B1500000:
speed_value = 1500000;
break;
case B2000000:
speed_value = 2000000;
break;
case B2500000:
speed_value = 2500000;
break;
case B3000000:
speed_value = 3000000;
break;
case B3500000:
speed_value = 3500000;
break;
case B4000000:
speed_value = 4000000;
break;
default:
speed_value = -1; // invalid speed
break;
}
return speed_value;
}
/* time.h */
/* Operations on timevals. */
#define timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
#define timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
#define timevalcmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? ((tvp)->tv_usec cmp(uvp)->tv_usec) \
: ((tvp)->tv_sec cmp(uvp)->tv_sec))
rt_inline void getmicrotime(struct timeval *now)
{
gettimeofday(now, RT_NULL);
}
rt_inline void timevalfix(struct timeval *tv)
{
if (tv->tv_usec < 0)
{
tv->tv_sec--;
tv->tv_usec += 1000000;
}
if (tv->tv_usec >= 1000000)
{
tv->tv_sec++;
tv->tv_usec -= 1000000;
}
}
rt_inline void timevaladd(struct timeval *op1, const struct timeval *op2)
{
op1->tv_sec += op2->tv_sec;
op1->tv_usec += op2->tv_usec;
timevalfix(op1);
}
rt_inline void timevalsub(struct timeval *op1, const struct timeval *op2)
{
op1->tv_sec -= op2->tv_sec;
op1->tv_usec -= op2->tv_usec;
timevalfix(op1);
}
rt_inline rt_tick_t tvtohz(struct timeval *tv)
{
rt_tick_t rc;
rc = tv->tv_sec * RT_TICK_PER_SECOND;
rc += tv->tv_usec * RT_TICK_PER_SECOND / MICROSECOND_PER_SECOND;
return rc;
}
/* ioctl */
#define _BSD_TIOCTL(val) ((val) << 16)
enum bsd_ioctl_cmd
{
BSD_TIOCDRAIN = 1,
BSD_TIOCFLUSH,
BSD_TIOCSTART,
BSD_TIOCSTOP,
BSD_TIOCSTAT,
BSD_TIOCGDRAINWAIT,
BSD_TIOCSDRAINWAIT,
BSD_TIOCSDTR,
BSD_TIOCCDTR,
};
#ifndef TIOCGETA /* get termios struct */
#define TIOCGETA TCGETS
#endif
#ifndef TIOCSETA /* set termios struct */
#define TIOCSETA TCSETS
#endif
#ifndef TIOCSETAW /* drain output, set */
#define TIOCSETAW TCSETSW
#endif
#ifndef TIOCSETAF /* drn out, fls in, set */
#define TIOCSETAF TCSETSF
#endif
#ifndef TIOCDRAIN /* wait till output drained */
#define TIOCDRAIN _BSD_TIOCTL(BSD_TIOCDRAIN)
#endif
#ifndef TIOCFLUSH /* flush buffers */
#define TIOCFLUSH _BSD_TIOCTL(BSD_TIOCFLUSH)
#endif
#ifndef TIOCSTART /* start output, like ^Q */
#define TIOCSTART _BSD_TIOCTL(BSD_TIOCSTART)
#endif
#ifndef TIOCSTOP /* stop output, like ^S */
#define TIOCSTOP _BSD_TIOCTL(BSD_TIOCSTOP)
#endif
#ifndef TIOCSTAT /* simulate ^T status message */
#define TIOCSTAT _BSD_TIOCTL(BSD_TIOCSTAT)
#endif
#ifndef TIOCGDRAINWAIT /* get ttywait timeout */
#define TIOCGDRAINWAIT _BSD_TIOCTL(BSD_TIOCGDRAINWAIT)
#endif
#ifndef TIOCSDRAINWAIT /* set ttywait timeout */
#define TIOCSDRAINWAIT _BSD_TIOCTL(BSD_TIOCSDRAINWAIT)
#endif
#ifndef TIOCSDTR /* set data terminal ready */
#define TIOCSDTR _BSD_TIOCTL(BSD_TIOCSDTR)
#endif
#ifndef TIOCCDTR /* clear data terminal ready */
#define TIOCCDTR _BSD_TIOCTL(BSD_TIOCCDTR)
#endif
#define ENOIOCTL ENOSYS
#define NO_PID -1
/* line discipline */
#define TTYDISC 0 /* termios tty line discipline */
#define SLIPDISC 4 /* serial IP discipline */
#define PPPDISC 5 /* PPP discipline */
#define NETGRAPHDISC 6 /* Netgraph tty node discipline */
#define H4DISC 7 /* Netgraph Bluetooth H4 discipline */
/*
* Control flags - hardware control of terminal
*/
#if __BSD_VISIBLE
#define CIGNORE 0x00000001 /* ignore control flags */
#define CCTS_OFLOW 0x00010000 /* CTS flow control of output */
#define CRTSCTS (CCTS_OFLOW | CRTS_IFLOW)
#define CRTS_IFLOW 0x00020000 /* RTS flow control of input */
#define CDTR_IFLOW 0x00040000 /* DTR flow control of input */
#define CDSR_OFLOW 0x00080000 /* DSR flow control of output */
#define CCAR_OFLOW 0x00100000 /* DCD flow control of output */
#define CNO_RTSDTR 0x00200000 /* Do not assert RTS or DTR automatically */
#else
#define CIGNORE 0 /* ignore control flags */
#define CCTS_OFLOW 0 /* CTS flow control of output */
#define CRTS_IFLOW 0 /* RTS flow control of input */
#define CDTR_IFLOW 0 /* DTR flow control of input */
#define CDSR_OFLOW 0 /* DSR flow control of output */
#define CCAR_OFLOW 0 /* DCD flow control of output */
#define CNO_RTSDTR 0 /* Do not assert RTS or DTR automatically */
#endif
#ifndef CRTSCTS
#define CRTSCTS (CCTS_OFLOW | CRTS_IFLOW)
#endif
#ifndef howmany
#define howmany(x, y) (((x) + ((y)-1)) / (y))
#endif
struct ucred
{
};
#define NOCRED ((struct ucred *)0) /* no credential available */
#define FSCRED ((struct ucred *)-1) /* filesystem credential */
/* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
#include <fcntl.h>
#define FFLAGS(oflags) ((oflags)&O_EXEC ? (oflags) : (oflags) + 1)
#define OFLAGS(fflags) \
(((fflags) & (O_EXEC | O_PATH)) != 0 ? (fflags) : (fflags)-1)
typedef int fo_rdwr_t(struct lwp_tty *tp, struct uio *uio,
struct ucred *active_cred, int flags,
struct rt_thread *td);
typedef int fo_truncate_t(struct lwp_tty *tp, off_t length,
struct ucred *active_cred, struct rt_thread *td);
typedef int fo_ioctl_t(struct lwp_tty *tp, rt_ubase_t com, void *data,
struct ucred *active_cred, int fflags, struct rt_thread *td);
typedef int fo_poll_t(struct lwp_tty *tp, struct rt_pollreq *rq, struct ucred *active_cred,
struct rt_thread *td);
typedef int fo_stat_t(struct lwp_tty *tp, struct stat *sb,
struct ucred *active_cred);
typedef int fo_close_t(struct lwp_tty *tp, struct rt_thread *td);
#ifdef USING_BSD_FO_EXT
typedef int fo_chmod_t(struct file *fp, mode_t mode, struct ucred *active_cred,
struct rt_thread *td);
typedef int fo_chown_t(struct file *fp, uid_t uid, gid_t gid,
struct ucred *active_cred, struct rt_thread *td);
typedef int fo_sendfile_t(struct file *fp, int sockfd, struct uio *hdr_uio,
struct uio *trl_uio, off_t offset, size_t nbytes,
off_t *sent, int flags, struct rt_thread *td);
typedef int fo_seek_t(struct file *fp, off_t offset, int whence,
struct rt_thread *td);
typedef int fo_kqfilter_t(struct file *fp, struct knote *kn);
typedef int fo_fill_kinfo_t(struct file *fp, struct kinfo_file *kif,
struct filedesc *fdp);
typedef int fo_mmap_t(struct file *fp, vm_map_t map, vm_offset_t *addr,
vm_size_t size, vm_prot_t prot, vm_prot_t cap_maxprot,
int flags, vm_ooffset_t foff, struct rt_thread *td);
typedef int fo_aio_queue_t(struct file *fp, struct kaiocb *job);
typedef int fo_add_seals_t(struct file *fp, int flags);
typedef int fo_get_seals_t(struct file *fp, int *flags);
typedef int fo_fallocate_t(struct file *fp, off_t offset, off_t len,
struct rt_thread *td);
typedef int fo_fspacectl_t(struct file *fp, int cmd, off_t *offset,
off_t *length, int flags, struct ucred *active_cred,
struct rt_thread *td);
typedef int fo_spare_t(struct file *fp);
#endif /* USING_BSD_FO_EXT */
typedef int fo_flags_t;
struct bsd_fileops
{
fo_rdwr_t *fo_read;
fo_rdwr_t *fo_write;
fo_truncate_t *fo_truncate;
fo_ioctl_t *fo_ioctl;
fo_poll_t *fo_poll;
fo_stat_t *fo_stat;
fo_close_t *fo_close;
#ifdef USING_BSD_FO_EXT
fo_chmod_t *fo_chmod;
fo_chown_t *fo_chown;
fo_sendfile_t *fo_sendfile;
fo_seek_t *fo_seek;
fo_kqfilter_t *fo_kqfilter;
fo_fill_kinfo_t *fo_fill_kinfo;
fo_mmap_t *fo_mmap;
fo_aio_queue_t *fo_aio_queue;
fo_add_seals_t *fo_add_seals;
fo_get_seals_t *fo_get_seals;
fo_fallocate_t *fo_fallocate;
fo_fspacectl_t *fo_fspacectl;
fo_spare_t *fo_spares[8]; /* Spare slots */
#endif
fo_flags_t fo_flags; /* DFLAG_* below */
};
#define DFLAG_PASSABLE 0x01 /* may be passed via unix sockets. */
#define DFLAG_SEEKABLE 0x02 /* seekable / nonsequential */
#endif /* __LWP_TTY_BSD_PORTING_H__ */
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