FreeBSD/Linux Kernel Cross Reference
sys/compat/svr4_32/svr4_32_ioctl.c

     /*      $NetBSD: svr4_32_ioctl.c,v 1.21 2008/04/28 20:23:46 martin Exp $         */
     
     /*-
      * Copyright (c) 1994, 2008 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Christos Zoulas.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: svr4_32_ioctl.c,v 1.21 2008/04/28 20:23:46 martin Exp $");
    
    #include <sys/param.h>
    #include <sys/proc.h>
    #include <sys/systm.h>
    #include <sys/file.h>
    #include <sys/filedesc.h>
    #include <sys/ioctl.h>
    #include <sys/termios.h>
    #include <sys/tty.h>
    #include <sys/socket.h>
    #include <sys/mount.h>
    #include <net/if.h>
    #include <sys/malloc.h>
    
    #include <sys/syscallargs.h>
    
    #include <compat/sys/socket.h>
    
    #include <compat/svr4_32/svr4_32_types.h>
    #include <compat/svr4_32/svr4_32_util.h>
    #include <compat/svr4_32/svr4_32_signal.h>
    #include <compat/svr4_32/svr4_32_lwp.h>
    #include <compat/svr4_32/svr4_32_ucontext.h>
    #include <compat/svr4_32/svr4_32_syscallargs.h>
    #include <compat/svr4_32/svr4_32_stropts.h>
    #include <compat/svr4_32/svr4_32_ioctl.h>
    #include <compat/svr4_32/svr4_32_termios.h>
    #include <compat/svr4/svr4_ttold.h>
    #include <compat/svr4/svr4_filio.h>
    #include <compat/svr4_32/svr4_32_sockio.h>
    
    
    #ifdef DEBUG_SVR4
    static void svr4_32_decode_cmd(netbsd32_u_long, char *, char *, int *, int *);
    /*
     * Decode an ioctl command symbolically
     */
    static void
    svr4_32_decode_cmd(cmd, dir, c, num, argsiz)
            netbsd32_u_long   cmd;
            char             *dir, *c;
            int              *num, *argsiz;
    {
            if (cmd & SVR4_IOC_VOID)
                    *dir++ = 'V';
            if (cmd & SVR4_IOC_IN)
                    *dir++ = 'R';
            if (cmd & SVR4_IOC_OUT)
                    *dir++ = 'W';
            *dir = '\0';
            if (cmd & SVR4_IOC_INOUT)
                    *argsiz = (cmd >> 16) & 0xff;
            else
                    *argsiz = -1;
    
            *c = (cmd >> 8) & 0xff;
            *num = cmd & 0xff;
    }
    #endif
    
    int
    svr4_32_sys_ioctl(struct lwp *l, const struct svr4_32_sys_ioctl_args *uap, register_t *retval)
    {
            file_t          *fp;
            u_long           cmd;
            int error;
           int (*fun)(file_t *, struct lwp *, register_t *, int, u_long, void *);
   #ifdef DEBUG_SVR4
           char             dir[4];
           char             c;
           int              num;
           int              argsiz;
   
           svr4_32_decode_cmd(SCARG(uap, com), dir, &c, &num, &argsiz);
   
           uprintf("svr4_32_ioctl(%d, _IO%s(%c, %d, %d), %#x);\n", SCARG(uap, fd),
               dir, c, num, argsiz, SCARG(uap, data));
   #endif
           cmd = SCARG(uap, com);
   
           if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
                   return EBADF;
   
           if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
                   fd_putfile(SCARG(uap, fd));
                   return EBADF;
           }
   
           switch (cmd & 0xff00) {
           case SVR4_tIOC:
                   fun = svr4_ttold_ioctl;
                   break;
   
           case SVR4_TIOC:
                   fun = svr4_32_term_ioctl;
                   break;
   
           case SVR4_STR:
                   fun = svr4_32_stream_ioctl;
                   break;
   
           case SVR4_FIOC:
                   fun = svr4_fil_ioctl;
                   break;
   
           case SVR4_SIOC:
                   fun = svr4_32_sock_ioctl;
                   break;
   
           case SVR4_XIOC:
                   /* We do not support those */
                   fd_putfile(SCARG(uap, fd));
                   return EINVAL;
   
           default:
                   DPRINTF(("Unimplemented ioctl %lx\n", cmd));
                   fd_putfile(SCARG(uap, fd));
                   return 0;       /* XXX: really ENOSYS */
           }
           error = (*fun)(fp, l, retval, SCARG(uap, fd), cmd, SCARG_P32(uap, data));
           fd_putfile(SCARG(uap, fd));
           return error;
   }

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