Ejemplo n.º 1
0
int archivefs_opendir(const char *path, struct fuse_file_info *info) {
  char fpath[PATH_MAX];
  fullpath(fpath, path);

  /* Stejná logika jako u archivefs_open.
   */

  DIR* dir;
  if ((dir = opendir(fpath)) != NULL) {
    info->fh = intptr_t(dir);
    return 0;
  }

  FileSystem* fs;
  FileNode* node;

  if (!getFile(fpath, &fs, &node)) {
    print_err("OPENDIR", path, ENOENT);
    return -ENOENT;
  }

  struct fuse_context* context = fuse_get_context();
  if (fs->access(node, R_OK, context->uid, context->gid))
    return -EACCES;

  info->fh = intptr_t(new FileHandle(fs, node));

  return 0;
}
Ejemplo n.º 2
0
int archivefs_truncate(const char* path, off_t size) {
  char fpath[PATH_MAX];
  fullpath(fpath, path);

  FileSystem* fs;
  FileNode* node;
  int ret;

  if (!getFile(fpath, &fs, &node)) {
    ret = truncate(fpath, size);
    if (ret) {
      ret = errno;
    }
  } else {
    struct fuse_context* context = fuse_get_context();
    if (fs->access(node, W_OK, context->uid, context->gid))
      return -EACCES;
    ret = fs->truncate(node, size);
  }

  if (ret)
    print_err("TRUNCATE", path, ret);

  return -ret;
}
Ejemplo n.º 3
0
int archivefs_open(const char* path, struct fuse_file_info* info) {
  char fpath[PATH_MAX];
  fullpath(fpath, path);

  /* Nejprve se pokusím otevřít soubor s cestou path jakoby byl přítomen
   * fyzicky na disku - použiju systémový open.
   * Pokud volání této funkce selže, jedná se o soubor uvnitř archivu.
   */

  int fd;
  if ((fd = open(fpath, info->flags)) != -1) {
    info->fh = intptr_t(fd);
    return 0;
  }

  FileSystem* fs;
  FileNode* node;

  if (!getFile(fpath, &fs, &node)) {
    print_err("OPEN", path, ENOENT);
    return -ENOENT;
  }

  int ret;
  struct fuse_context* context = fuse_get_context();
  if (info->flags & O_RDWR) {
    if (fs->access(node, R_OK|W_OK, context->uid, context->gid))
      return -EACCES;
  } else if (info->flags & O_WRONLY) {
    if (fs->access(node, W_OK, context->uid, context->gid))
      return -EACCES;
  } else {
    if (fs->access(node, R_OK, context->uid, context->gid))
      return -EACCES;
  }

  if ((ret = fs->open(node, info->flags)) < 0) {
    print_err("OPEN", path, ret);
    return -ret;
  }

  info->fh = intptr_t(new FileHandle(fs, node));

  return 0;
}
Ejemplo n.º 4
0
int archivefs_access(const char* path, int mask) {
  char fpath[PATH_MAX];
  fullpath(fpath, path);
  FileSystem* fs;
  FileNode* node;
  int ret;
  struct fuse_context* context = fuse_get_context();

  if (!getFile(fpath, &fs, &node)) {
    ret = access(fpath, mask);
    if (ret) {
      ret = errno;
      print_err("ACCESS", path, ret);
    }
    return -ret;
  }

  ret = fs->access(node, mask, context->uid, context->gid);
  if (ret)
    print_err("ACCESS", path, ret);
  return -ret;
}