ioctl.h

这是又一个C语言解释器, 我们可以方便地扩展其功能, 并将其用于我们的工作中

/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
#ifndef __dj_include_sys_ioctl_h_
#define __dj_include_sys_ioctl_h_

#ifdef __cplusplus
extern "C"{
#endif


#ifndef __dj_ENFORCE_ANSI_FREESTANDING

#ifndef __STRICT_ANSI__

#ifndef _POSIX_SOURCE
/*
**  plain ioctl functions. Do not use them.
**  Never. Really _N_E_V_E_R_. Unless you really know what
**  you are doing.
**
*/
#define DOS_PLAIN_GETDEVDATA    0x00
#define DOS_PLAIN_SETDEVDATA    0x01
#define DOS_PLAIN_RCVDATA       0x02
#define DOS_PLAIN_SNDDATA       0x03
#define DOS_PLAIN_RCVCTLDATA    0x04
#define DOS_PLAIN_SNDCTLDATA    0x05
#define DOS_PLAIN_CHKINSTAT     0x06
#define DOS_PLAIN_CHKOUTSTAT    0x07
#define DOS_PLAIN_ISCHANGEABLE  0x08
#define DOS_PLAIN_ISREDIRBLK    0x09
#define DOS_PLAIN_ISREDIRHND    0x0a
#define DOS_PLAIN_SETRETRY      0x0b
#define DOS_PLAIN_GENCHARREQ    0x0c
#define DOS_PLAIN_GENBLKREQ     0x0d
#define DOS_PLAIN_GLDRVMAP      0x0e
#define DOS_PLAIN_SLDRVMAP      0x0f
#define DOS_PLAIN_QGIOCTLCAPH   0x10
#define DOS_PLAIN_QGIOCTLCAPD   0x11
/*
**  Flags for DOS commands
*/
#define DOS_XFER        0x8000         /* use xfer buffer                   */
#define DOS_RETMASK     0x7000         /* Here we put the bits to tell      */
                                       /* what to return. 8 possible values */
#define DOS_BRAINDEAD   0x0400         /* CX does not hold the number of    */
                                       /* bytes to transfer                 */

#define DOS_XINARGS(a)  ((a & 3)<<12)  /* How many extra args we expect.    */
#define DOS_RETAX       0x1000         /* return AX as result */
#define DOS_RETDX       0x2000         /* return DX as result */
#define DOS_RETDISI     0x3000         /* return DI SI as result */
/*
** DOS ioctls we support:
*/
#define DOS_GETDEVDATA      (DOS_PLAIN_GETDEVDATA|         DOS_RETDX|DOS_XINARGS(0))
#define DOS_SETDEVDATA      (DOS_PLAIN_SETDEVDATA|                   DOS_XINARGS(1))
#define DOS_RCVDATA         (DOS_PLAIN_RCVDATA   |DOS_XFER|DOS_RETAX|DOS_XINARGS(1))
#define DOS_SNDDATA         (DOS_PLAIN_SNDDATA   |DOS_XFER|DOS_RETAX|DOS_XINARGS(1))
#define DOS_RCVCTLDATA      (DOS_PLAIN_RCVCTLDATA|DOS_XFER|DOS_RETAX|DOS_XINARGS(1))
#define DOS_SNDCTLDATA      (DOS_PLAIN_SNDCTLDATA|DOS_XFER|DOS_RETAX|DOS_XINARGS(1))
#define DOS_CHKINSTAT       (DOS_PLAIN_CHKINSTAT |         DOS_RETAX)
#define DOS_CHKOUTSTAT      (DOS_PLAIN_CHKOUTSTAT|         DOS_RETAX)
#define DOS_ISCHANGEABLE    (DOS_PLAIN_ISCHANGEABLE|       DOS_RETAX)
#define DOS_ISREDIRBLK      (DOS_PLAIN_ISREDIRBLK|         DOS_RETDX)
#define DOS_ISREDIRHND      (DOS_PLAIN_ISREDIRHND|         DOS_RETDX)
#define DOS_SETRETRY        (DOS_PLAIN_SETRETRY|                     DOS_XINARGS(1))
/*
These ones do not fit into my scheme, because they _DO_NOT_ put the size
of the xfer buffer in CX. Aaaaargh
*/
#define DOS_GENCHARREQ      (DOS_PLAIN_GENCHARREQ|DOS_BRAINDEAD|DOS_RETDISI)
#define DOS_GENBLKREQ       (DOS_PLAIN_GENBLKREQ |DOS_BRAINDEAD|DOS_RETAX)
#define DOS_GLDRVMAP        (DOS_PLAIN_GLDRVMAP|           DOS_RETAX)
#define DOS_SLDRVMAP        (DOS_PLAIN_SLDRVMAP|           DOS_RETAX)
#define DOS_QGIOCTLCAPH     (DOS_PLAIN_QGIOCTLCAPH|        DOS_RETAX)
#define DOS_QGIOCTLCAPD     (DOS_PLAIN_QGIOCTLCAPD|        DOS_RETAX)


#define __IS_UNIX_IOCTL(a) ((a) & 0xd0000000U)
#if 0
/*
** UNIX stuff
**
** This is subject to major changes in the near future.
** Do not use it yet.
*/

/*
** __WARNING__ :
** This ifdef works for DJGPP, because its io.h
** defines __djgpp_include_io_h_
*/
#ifndef _IO
/*
* Ioctl's have the command encoded in the lower word,
* and the size of any in or out parameters in the upper
* word.  The high 2 bits of the upper word are used
* to encode the in/out status of the parameter; for now
* we restrict parameters to at most 128 bytes.
*/
#define IOCPARM_MASK    0x7f            /* parameters must be < 128 bytes */
#define IOC_VOID        0x20000000      /* no parameters */
#define IOC_OUT         0x40000000      /* copy out parameters */
#define IOC_IN          0x80000000      /* copy in parameters */
#define IOC_INOUT       (IOC_IN|IOC_OUT)
/* the 0x20000000 is so we can distinguish new ioctl's from old */
#define _IO(x,y)        (IOC_VOID|(x<<8)|y)
#define _IOR(x,y,t)     (IOC_OUT|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y)
#define _IOW(x,y,t)     (IOC_IN|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y)
/* this should be _IORW, but stdio got there first */
#define _IOWR(x,y,t)    (IOC_INOUT|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y)
#endif /* _IO */
/* Common ioctl's for all disciplines which are handled in ttiocom */
enum tty_ioctl {
    TXISATTY = ('X'<<8),    /* quick path for isatty */
    TXTTYNAME,				/* quick path for ttyname */
    TXGETLD,				/* get line discipline */
    TXSETLD,				/* set line discipline */
    TXGETCD,				/* get control disciplines */
    TXADDCD,				/* add control discipline */
    TXDELCD,				/* delete control discipline */
    TXSBAUD,				/* set integer baud rate */
    TXGBAUD,				/* get integer baud rate */
    TXSETIHOG,				/* set the input buffer limit */
    TXSETOHOG,				/* set the output buffer limit */
    TXGPGRP,				/* get p grp with posix security */
    TXSPGRP                 /* set p grp with posix security */
};

#define TTNAMEMAX 32        /* used with TXGETLD, et al */

union txname {				/* used with TXGETCD */
    int tx_which;			/* which name to get -- inbound */
    char tx_name[TTNAMEMAX];/* the name -- outbound */
};

/* 
 * window size structure used with TXSETWIN and TXGETWIN.  This is 
 * exactly the same as the Berkeley structure and can be used with 
 * TIOCSWINSZ and TIOCGWINSZ -- in fact they are defined to be the 
 * same.
 */
struct winsize {
	unsigned short	ws_row;			/* rows, in characters */
	unsigned short	ws_col;			/* columns, in characters */
	unsigned short	ws_xpixel;		/* horizontal size, pixels */
	unsigned short	ws_ypixel;		/* vertical size, pixels */
};

struct tchars {
	char	t_intrc;	/* interrupt */
	char	t_quitc;	/* quit */
	char	t_startc;	/* start output */
	char	t_stopc;	/* stop output */
	char	t_eofc;		/* end-of-file */
	char	t_brkc;		/* input delimiter (like nl) */
};
struct ltchars {
	char	t_suspc;	/* stop process signal */
	char	t_dsuspc;	/* delayed stop process signal */
	char	t_rprntc;	/* reprint line */
	char	t_flushc;	/* flush output (toggles) */
	char	t_werasc;	/* word erase */
	char	t_lnextc;	/* literal next character */
};

/*
* Structure for TIOCGETP and TIOCSETP ioctls.
*/

struct sgttyb {
	char	sg_ispeed;		/* input speed */
	char	sg_ospeed;		/* output speed */
	char	sg_erase;		/* erase character */
	char	sg_kill;		/* kill character */
	short	sg_flags;		/* mode flags */
};

/*
 * Pun for SUN.
 */