fs/sandbox/sandboxfs.c

   1 /*
   2  * Copyright (c) 2012, Google Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <fs.h>
   9 #include <os.h>
  10
  11 int sandbox_fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
  12 {
  13         return 0;
  14 }
  15
  16 long sandbox_fs_read_at(const char *filename, unsigned long pos,
  17                              void *buffer, unsigned long maxsize)
  18 {
  19         ssize_t size;
  20         int fd, ret;
  21
  22         fd = os_open(filename, OS_O_RDONLY);
  23         if (fd < 0)
  24                 return fd;
  25         ret = os_lseek(fd, pos, OS_SEEK_SET);
  26         if (ret == -1) {
  27                 os_close(fd);
  28                 return ret;
  29         }
  30         if (!maxsize)
  31                 maxsize = os_get_filesize(filename);
  32         size = os_read(fd, buffer, maxsize);
  33         os_close(fd);
  34
  35         return size;
  36 }
  37
  38 long sandbox_fs_write_at(const char *filename, unsigned long pos,
  39                          void *buffer, unsigned long towrite)
  40 {
  41         ssize_t size;
  42         int fd, ret;
  43
  44         fd = os_open(filename, OS_O_RDWR | OS_O_CREAT);
  45         if (fd < 0)
  46                 return fd;
  47         ret = os_lseek(fd, pos, OS_SEEK_SET);
  48         if (ret == -1) {
  49                 os_close(fd);
  50                 return ret;
  51         }
  52         size = os_write(fd, buffer, towrite);
  53         os_close(fd);
  54
  55         return size;
  56 }
  57
  58 int sandbox_fs_ls(const char *dirname)
  59 {
  60         struct os_dirent_node *head, *node;
  61         int ret;
  62
  63         ret = os_dirent_ls(dirname, &head);
  64         if (ret)
  65                 return ret;
  66
  67         for (node = head; node; node = node->next) {
  68                 printf("%s %10lu %s\n", os_dirent_get_typename(node->type),
  69                        node->size, node->name);
  70         }
  71
  72         return 0;
  73 }
  74
  75 int sandbox_fs_exists(const char *filename)
  76 {
  77         ssize_t sz;
  78
  79         sz = os_get_filesize(filename);
  80         return sz >= 0;
  81 }
  82
  83 void sandbox_fs_close(void)
  84 {
  85 }
  86
  87 int fs_read_sandbox(const char *filename, void *buf, int offset, int len)
  88 {
  89         int len_read;
  90
  91         len_read = sandbox_fs_read_at(filename, offset, buf, len);
  92         if (len_read == -1) {
  93                 printf("** Unable to read file %s **\n", filename);
  94                 return -1;
  95         }
  96
  97         return len_read;
  98 }
  99
 100 int fs_write_sandbox(const char *filename, void *buf, int offset, int len)
 101 {
 102         int len_written;
 103
 104         len_written = sandbox_fs_write_at(filename, offset, buf, len);
 105         if (len_written == -1) {
 106                 printf("** Unable to write file %s **\n", filename);
 107                 return -1;
 108         }
 109
 110         return len_written;
 111 }