BSD 4_2 development

[unix-history] / usr / src / sys / stand / confrl.c

/*      confrl.c        6.1     83/07/29        */

#include "../machine/pte.h"

#include "../h/param.h"
#include "../h/inode.h"
#include "../h/fs.h"
#include "saio.h"

devread(io)
       register struct iob *io;
{
       int cc;

       io->i_flgs |= F_RDDATA;
       io->i_error = 0;
       cc = (*devsw[io->i_ino.i_dev].dv_strategy)(io, READ);
       io->i_flgs &= ~F_TYPEMASK;
       return (cc);
}

devwrite(io)
       register struct iob *io;
{
       int cc;

       io->i_flgs |= F_WRDATA;
       io->i_error = 0;
       cc = (*devsw[io->i_ino.i_dev].dv_strategy)(io, WRITE);
       io->i_flgs &= ~F_TYPEMASK;
       return (cc);
}

devopen(io)
       register struct iob *io;
{

       (*devsw[io->i_ino.i_dev].dv_open)(io);
}

devclose(io)
       register struct iob *io;
{

       (*devsw[io->i_ino.i_dev].dv_close)(io);
}

devioctl(io, cmd, arg)
       register struct iob *io;
       int cmd;
       caddr_t arg;
{

       return ((*devsw[io->i_ino.i_dev].dv_ioctl)(io, cmd, arg));
}

/*ARGSUSED*/
nullsys(io)
       struct iob *io;
{

       ;
}

/*ARGSUSED*/
nullioctl(io, cmd, arg)
       struct iob *io;
       int cmd;
       caddr_t arg;
{

       return (ECMD);
}

int     nullsys(), nullioctl();
int     rlstrategy(), rlopen(), rlioctl();

struct devsw devsw[] = {
       { "rl", rlstrategy,     rlopen,         nullsys,        rlioctl },
       { 0, 0, 0, 0, 0 }
};