termios.h

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#ifndef _ALPHA_TERMIOS_H
#define _ALPHA_TERMIOS_H

#include <asm/ioctls.h>
#include <asm/termbits.h>

struct sgttyb {
    char    sg_ispeed;
    char    sg_ospeed;
    char    sg_erase;
    char    sg_kill;
    short   sg_flags;
};

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 winsize {
    unsigned short ws_row;
    unsigned short ws_col;
    unsigned short ws_xpixel;
    unsigned short ws_ypixel;
};

#define NCC 8
struct termio {
    unsigned short c_iflag;     /* input mode flags */
    unsigned short c_oflag;     /* output mode flags */
    unsigned short c_cflag;     /* control mode flags */
    unsigned short c_lflag;     /* local mode flags */
    unsigned char c_line;       /* line discipline */
    unsigned char c_cc[NCC];    /* control characters */
};

/*
 * c_cc characters in the termio structure.  Oh, how I love being
 * backwardly compatible.  Notice that character 4 and 5 are
 * interpreted differently depending on whether ICANON is set in
 * c_lflag.  If it's set, they are used as _VEOF and _VEOL, otherwise
 * as _VMIN and V_TIME.  This is for compatibility with OSF/1 (which
 * is compatible with sysV)...
 */
#define _VINTR  0
#define _VQUIT  1
#define _VERASE 2
#define _VKILL  3
#define _VEOF   4
#define _VMIN   4
#define _VEOL   5
#define _VTIME  5
#define _VEOL2  6
#define _VSWTC  7

#ifdef __KERNEL__
/*  eof=^D      eol=\0      eol2=\0     erase=del
    werase=^W   kill=^U     reprint=^R  sxtc=\0
    intr=^C     quit=^\     susp=^Z     <OSF/1 VDSUSP>
    start=^Q    stop=^S     lnext=^V    discard=^U
    vmin=\1     vtime=\0
*/
#define INIT_C_CC "\004\000\000\177\027\025\022\000\003\034\032\000\021\023\026\025\001\000"

/*
 * Translate a "termio" structure into a "termios". Ugh.
 */

#define user_termio_to_kernel_termios(a_termios, u_termio)          \
({                                      \
    struct ktermios *k_termios = (a_termios);               \
    struct termio k_termio;                         \
    int canon, ret;                             \
                                        \
    ret = copy_from_user(&k_termio, u_termio, sizeof(k_termio));        \
    if (!ret) {                             \
        /* Overwrite only the low bits.  */             \
        *(unsigned short *)&k_termios->c_iflag = k_termio.c_iflag;  \
        *(unsigned short *)&k_termios->c_oflag = k_termio.c_oflag;  \
        *(unsigned short *)&k_termios->c_cflag = k_termio.c_cflag;  \
        *(unsigned short *)&k_termios->c_lflag = k_termio.c_lflag;  \
        canon = k_termio.c_lflag & ICANON;              \
                                        \
        k_termios->c_cc[VINTR]  = k_termio.c_cc[_VINTR];        \
        k_termios->c_cc[VQUIT]  = k_termio.c_cc[_VQUIT];        \
        k_termios->c_cc[VERASE] = k_termio.c_cc[_VERASE];       \
        k_termios->c_cc[VKILL]  = k_termio.c_cc[_VKILL];        \
        k_termios->c_cc[VEOL2]  = k_termio.c_cc[_VEOL2];        \
        k_termios->c_cc[VSWTC]  = k_termio.c_cc[_VSWTC];        \
        k_termios->c_cc[canon ? VEOF : VMIN]  = k_termio.c_cc[_VEOF];   \
        k_termios->c_cc[canon ? VEOL : VTIME] = k_termio.c_cc[_VEOL];   \
    }                                   \
    ret;                                    \
})

/*
 * Translate a "termios" structure into a "termio". Ugh.
 *
 * Note the "fun" _VMIN overloading.
 */
#define kernel_termios_to_user_termio(u_termio, a_termios)      \
({                                  \
    struct ktermios *k_termios = (a_termios);           \
    struct termio k_termio;                     \
    int canon;                          \
                                    \
    k_termio.c_iflag = k_termios->c_iflag;              \
    k_termio.c_oflag = k_termios->c_oflag;              \
    k_termio.c_cflag = k_termios->c_cflag;              \
    canon = (k_termio.c_lflag = k_termios->c_lflag) & ICANON;   \
                                    \
    k_termio.c_line = k_termios->c_line;                \
    k_termio.c_cc[_VINTR]  = k_termios->c_cc[VINTR];        \
    k_termio.c_cc[_VQUIT]  = k_termios->c_cc[VQUIT];        \
    k_termio.c_cc[_VERASE] = k_termios->c_cc[VERASE];       \
    k_termio.c_cc[_VKILL]  = k_termios->c_cc[VKILL];        \
    k_termio.c_cc[_VEOF]   = k_termios->c_cc[canon ? VEOF : VMIN];  \
    k_termio.c_cc[_VEOL]   = k_termios->c_cc[canon ? VEOL : VTIME]; \
    k_termio.c_cc[_VEOL2]  = k_termios->c_cc[VEOL2];        \
    k_termio.c_cc[_VSWTC]  = k_termios->c_cc[VSWTC];        \
                                    \
    copy_to_user(u_termio, &k_termio, sizeof(k_termio));        \
})

#define user_termios_to_kernel_termios(k, u) \
    copy_from_user(k, u, sizeof(struct termios))

#define kernel_termios_to_user_termios(u, k) \
    copy_to_user(u, k, sizeof(struct termios))

#endif  /* __KERNEL__ */

#endif  /* _ALPHA_TERMIOS_H */