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      1 /*	$NetBSD: pathfs.c,v 1.1 2012/01/18 23:12:21 nonaka Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 2012 NONAKA Kimihiro <nonaka (at) netbsd.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "boot.h"
     29 #include "pathfs.h"
     30 #include "unixdev.h"
     31 #include "compat_linux.h"
     32 
     33 __compactcall int
     34 pathfs_open(const char *path, struct open_file *fd)
     35 {
     36 
     37 	if (strcmp(fd->f_dev->dv_name, "path"))
     38 		return EINVAL;
     39 
     40 	(void) ulseek((int)fd->f_devdata, 0L, SEEK_SET);
     41 	return 0;
     42 }
     43 
     44 __compactcall int
     45 pathfs_read(struct open_file *fd, void *vbuf, size_t nbyte, size_t *resid)
     46 {
     47 	char *buf = vbuf;
     48 	size_t off = 0;
     49 	ssize_t rsz;
     50 
     51 	while (off < nbyte) {
     52 		rsz = uread((int)fd->f_devdata, buf + off, nbyte - off);
     53 		if (rsz < 0)
     54 			return errno;
     55 		if (rsz == 0)
     56 			break;
     57 		off += rsz;
     58 	}
     59 
     60 	*resid -= off;
     61 	return 0;
     62 }
     63 
     64 __compactcall int
     65 pathfs_write(struct open_file *fd, void *vbuf, size_t size, size_t *resid)
     66 {
     67 
     68 	return EROFS;
     69 }
     70 
     71 __compactcall off_t
     72 pathfs_seek(struct open_file *fd, off_t offset, int whence)
     73 {
     74 
     75 	return ulseek((int)fd->f_devdata, offset, whence);
     76 }
     77 
     78 __compactcall int
     79 pathfs_close(struct open_file *fd)
     80 {
     81 
     82 	return 0;
     83 }
     84 
     85 __compactcall int
     86 pathfs_stat(struct open_file *fd, struct stat *sb)
     87 {
     88 	struct linux_stat lsb;
     89 	int rv;
     90 
     91 	rv = ufstat((int)fd->f_devdata, &lsb);
     92 	if (rv < 0)
     93 		return errno;
     94 
     95 	sb->st_ino = lsb.lst_ino;
     96 	sb->st_mode = lsb.lst_mode;
     97 	sb->st_nlink = lsb.lst_nlink;
     98 	sb->st_uid = lsb.lst_uid;
     99 	sb->st_gid = lsb.lst_gid;
    100 	sb->st_size = lsb.lst_size;
    101 	sb->st_blksize = lsb.lst_blksize;
    102 	sb->st_blocks = lsb.lst_blocks;
    103 	sb->st_atime = lsb.lst_atime;
    104 	sb->st_mtime = lsb.lst_mtime;
    105 	sb->st_ctime = lsb.lst_ctime;
    106 	return 0;
    107 }
    108 
    109 __compactcall void
    110 pathfs_ls(struct open_file *f, const char *pattern)
    111 {
    112 
    113 	printf("Currently ls command is unsupported by pathfs.\n");
    114 }
    115