fs/sandbox/sandboxfs.c

   1 /*
   2  * Copyright (c) 2012, Google Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of
   7  * the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  17  * MA 02111-1307 USA
  18  */
  19
  20 #include <common.h>
  21 #include <fs.h>
  22 #include <os.h>
  23
  24 int sandbox_fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
  25 {
  26         return 0;
  27 }
  28
  29 long sandbox_fs_read_at(const char *filename, unsigned long pos,
  30                              void *buffer, unsigned long maxsize)
  31 {
  32         ssize_t size;
  33         int fd, ret;
  34
  35         fd = os_open(filename, OS_O_RDONLY);
  36         if (fd < 0)
  37                 return fd;
  38         ret = os_lseek(fd, pos, OS_SEEK_SET);
  39         if (ret == -1) {
  40                 os_close(fd);
  41                 return ret;
  42         }
  43         if (!maxsize)
  44                 maxsize = os_get_filesize(filename);
  45         size = os_read(fd, buffer, maxsize);
  46         os_close(fd);
  47
  48         return size;
  49 }
  50
  51 long sandbox_fs_write_at(const char *filename, unsigned long pos,
  52                          void *buffer, unsigned long towrite)
  53 {
  54         ssize_t size;
  55         int fd, ret;
  56
  57         fd = os_open(filename, OS_O_RDWR | OS_O_CREAT);
  58         if (fd < 0)
  59                 return fd;
  60         ret = os_lseek(fd, pos, OS_SEEK_SET);
  61         if (ret == -1) {
  62                 os_close(fd);
  63                 return ret;
  64         }
  65         size = os_write(fd, buffer, towrite);
  66         os_close(fd);
  67
  68         return size;
  69 }
  70
  71 int sandbox_fs_ls(const char *dirname)
  72 {
  73         struct os_dirent_node *head, *node;
  74         int ret;
  75
  76         ret = os_dirent_ls(dirname, &head);
  77         if (ret)
  78                 return ret;
  79
  80         for (node = head; node; node = node->next) {
  81                 printf("%s %10lu %s\n", os_dirent_get_typename(node->type),
  82                        node->size, node->name);
  83         }
  84
  85         return 0;
  86 }
  87
  88 void sandbox_fs_close(void)
  89 {
  90 }
  91
  92 int fs_read_sandbox(const char *filename, void *buf, int offset, int len)
  93 {
  94         int len_read;
  95
  96         len_read = sandbox_fs_read_at(filename, offset, buf, len);
  97         if (len_read == -1) {
  98                 printf("** Unable to read file %s **\n", filename);
  99                 return -1;
 100         }
 101
 102         return len_read;
 103 }
 104
 105 int fs_write_sandbox(const char *filename, void *buf, int offset, int len)
 106 {
 107         int len_written;
 108
 109         len_written = sandbox_fs_write_at(filename, offset, buf, len);
 110         if (len_written == -1) {
 111                 printf("** Unable to write file %s **\n", filename);
 112                 return -1;
 113         }
 114
 115         return len_written;
 116 }