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devnodes.c revision 1.1.2.2 
      1 /*	$NetBSD: devnodes.c,v 1.1.2.2 2009/09/16 13:38:05 yamt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2009 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: devnodes.c,v 1.1.2.2 2009/09/16 13:38:05 yamt Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/device.h>
     33 #include <sys/filedesc.h>
     34 #include <sys/kmem.h>
     35 #include <sys/lwp.h>
     36 #include <sys/stat.h>
     37 #include <sys/vfs_syscalls.h>
     38 
     39 #include "rump_vfs_private.h"
     40 
     41 /* realqvik(tm) "devfs" */
     42 int
     43 rump_vfs_makedevnodes(dev_t devtype, const char *basename, char minchar,
     44 	devmajor_t maj, devminor_t minnum, int nnodes)
     45 {
     46 	int error;
     47 	char *devname, *p;
     48 	size_t devlen;
     49 	register_t retval;
     50 
     51 	error = do_sys_mkdir("/dev", 0777, UIO_SYSSPACE);
     52 	if (error != 0 && error != EEXIST)
     53 		return error;
     54 
     55 	devlen = strlen("/dev/") + strlen(basename) + 1 + 1; /* +letter +0 */
     56 	devname = kmem_zalloc(devlen, KM_SLEEP);
     57 	strlcpy(devname, "/dev/", devlen);
     58 	strlcat(devname, basename, devlen);
     59 	p = devname + devlen-2;
     60 
     61 	for (; nnodes > 0; nnodes--, minchar++, minnum++) {
     62 		KASSERT(minchar <= 'z');
     63 		*p = minchar;
     64 
     65 		if ((error = do_sys_mknod(curlwp, devname, 0666 | devtype,
     66 		    makedev(maj, minnum), &retval, UIO_SYSSPACE)))
     67 			goto out;
     68 	}
     69 
     70  out:
     71 	kmem_free(devname, devlen);
     72 	return error;
     73 }
     74