114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
/*
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* \brief Libc plugin for using a process-local virtual file system
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* \author Norman Feske
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* \author Emery Hemingway
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* \author Christian Helmuth
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* \date 2014-04-09
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*/
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/*
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* Copyright (C) 2014-2019 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _LIBC__INTERNAL__VFS_PLUGIN_H_
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#define _LIBC__INTERNAL__VFS_PLUGIN_H_
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/* Genode includes */
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#include <libc/component.h>
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#include <vfs/file_system.h>
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/* libc includes */
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#include <fcntl.h>
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#include <unistd.h>
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/* libc plugin interface */
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#include <libc-plugin/plugin.h>
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#include <libc-plugin/fd_alloc.h>
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/* libc-internal includes */
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#include <internal/errno.h>
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namespace Libc { class Vfs_plugin; }
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class Libc::Vfs_plugin : public Libc::Plugin
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{
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private:
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Genode::Allocator &_alloc;
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Vfs::File_system &_root_dir;
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Vfs::Io_response_handler &_response_handler;
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/**
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* Sync a handle and propagate errors
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*/
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int _vfs_sync(Vfs::Vfs_handle&);
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public:
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Vfs_plugin(Libc::Env &env,
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Genode::Allocator &alloc,
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Vfs::Io_response_handler &handler)
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:
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_alloc(alloc), _root_dir(env.vfs()), _response_handler(handler)
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{ }
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~Vfs_plugin() final { }
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bool root_dir_has_dirents() const { return _root_dir.num_dirent("/") > 0; }
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bool supports_access(const char *, int) override { return true; }
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bool supports_mkdir(const char *, mode_t) override { return true; }
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bool supports_open(const char *, int) override { return true; }
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bool supports_poll() override { return true; }
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bool supports_readlink(const char *, char *, ::size_t) override { return true; }
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bool supports_rename(const char *, const char *) override { return true; }
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bool supports_rmdir(const char *) override { return true; }
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bool supports_stat(const char *) override { return true; }
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bool supports_symlink(const char *, const char *) override { return true; }
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bool supports_unlink(const char *) override { return true; }
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bool supports_mmap() override { return true; }
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bool supports_select(int nfds,
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fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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struct timeval *timeout) override;
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Libc::File_descriptor *open(const char *, int, int libc_fd);
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Libc::File_descriptor *open(const char *path, int flags) override
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{
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return open(path, flags, Libc::ANY_FD);
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}
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int access(char const *, int) override;
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int close(Libc::File_descriptor *) override;
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int dup2(Libc::File_descriptor *, Libc::File_descriptor *) override;
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int fcntl(Libc::File_descriptor *, int, long) override;
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int fstat(Libc::File_descriptor *, struct stat *) override;
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int fstatfs(Libc::File_descriptor *, struct statfs *) override;
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int fsync(Libc::File_descriptor *fd) override;
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int ftruncate(Libc::File_descriptor *, ::off_t) override;
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ssize_t getdirentries(Libc::File_descriptor *, char *, ::size_t , ::off_t *) override;
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int ioctl(Libc::File_descriptor *, int , char *) override;
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::off_t lseek(Libc::File_descriptor *fd, ::off_t offset, int whence) override;
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int mkdir(const char *, mode_t) override;
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bool poll(File_descriptor &fdo, struct pollfd &pfd) override;
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ssize_t read(Libc::File_descriptor *, void *, ::size_t) override;
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ssize_t readlink(const char *, char *, ::size_t) override;
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int rename(const char *, const char *) override;
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int rmdir(const char *) override;
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int stat(const char *, struct stat *) override;
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int symlink(const char *, const char *) override;
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int unlink(const char *) override;
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ssize_t write(Libc::File_descriptor *, const void *, ::size_t ) override;
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void *mmap(void *, ::size_t, int, int, Libc::File_descriptor *, ::off_t) override;
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int munmap(void *, ::size_t) override;
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int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) override;
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};
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#endif /* _LIBC__INTERNAL__VFS_PLUGIN_H_ */
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