66290ea46d
This patch introduces support for stacked file systems alongside new glue for accessing file-system implementations provided via Genode's new file-system-session interface. Using stacked file systems, an arbitrary number of file systems (such as tar archives or file systems implemented as separate Genode components) can be composed to form one merged virtual file system. An example is given via the 'ports/run/noux_bash.run' script. This run script creates a virtual file system out of multiple tar archives each containing the content of a particular GNU package. In addition, one 'ram_fs' is mounted, which enables Noux to perform write operations. This way, the shell output can be redirected to a file, or files can be saved in VIM. Fixes #103.
120 lines
2.6 KiB
C++
120 lines
2.6 KiB
C++
/*
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* \brief Noux session interface
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* \author Norman Feske
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* \date 2011-02-15
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*/
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/*
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* Copyright (C) 2011-2012 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__NOUX_SESSION__NOUX_SESSION_H_
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#define _INCLUDE__NOUX_SESSION__NOUX_SESSION_H_
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#include <base/stdint.h>
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#include <session/session.h>
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#include <dataspace/capability.h>
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#define NOUX_DECL_SYSCALL_NAME(name) \
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case SYSCALL_##name: return #name;
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namespace Noux {
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using namespace Genode;
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struct Session : Genode::Session
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{
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static const char *service_name() { return "Noux"; }
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virtual ~Session() { }
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virtual Dataspace_capability sysio_dataspace() = 0;
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enum Syscall {
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SYSCALL_GETCWD,
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SYSCALL_WRITE,
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SYSCALL_READ,
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SYSCALL_STAT,
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SYSCALL_LSTAT,
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SYSCALL_FSTAT,
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SYSCALL_FCNTL,
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SYSCALL_OPEN,
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SYSCALL_CLOSE,
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SYSCALL_IOCTL,
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SYSCALL_LSEEK,
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SYSCALL_DIRENT,
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SYSCALL_FCHDIR,
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SYSCALL_EXECVE,
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SYSCALL_SELECT,
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SYSCALL_FORK,
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SYSCALL_GETPID,
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SYSCALL_WAIT4,
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SYSCALL_PIPE,
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SYSCALL_DUP2,
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SYSCALL_UNLINK,
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SYSCALL_RENAME,
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SYSCALL_MKDIR,
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SYSCALL_INVALID = -1
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};
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static char const *syscall_name(Syscall sc)
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{
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switch (sc) {
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NOUX_DECL_SYSCALL_NAME(GETCWD)
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NOUX_DECL_SYSCALL_NAME(WRITE)
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NOUX_DECL_SYSCALL_NAME(READ)
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NOUX_DECL_SYSCALL_NAME(STAT)
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NOUX_DECL_SYSCALL_NAME(LSTAT)
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NOUX_DECL_SYSCALL_NAME(FSTAT)
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NOUX_DECL_SYSCALL_NAME(FCNTL)
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NOUX_DECL_SYSCALL_NAME(OPEN)
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NOUX_DECL_SYSCALL_NAME(CLOSE)
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NOUX_DECL_SYSCALL_NAME(IOCTL)
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NOUX_DECL_SYSCALL_NAME(LSEEK)
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NOUX_DECL_SYSCALL_NAME(DIRENT)
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NOUX_DECL_SYSCALL_NAME(FCHDIR)
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NOUX_DECL_SYSCALL_NAME(EXECVE)
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NOUX_DECL_SYSCALL_NAME(SELECT)
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NOUX_DECL_SYSCALL_NAME(FORK)
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NOUX_DECL_SYSCALL_NAME(GETPID)
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NOUX_DECL_SYSCALL_NAME(WAIT4)
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NOUX_DECL_SYSCALL_NAME(PIPE)
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NOUX_DECL_SYSCALL_NAME(DUP2)
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NOUX_DECL_SYSCALL_NAME(UNLINK)
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NOUX_DECL_SYSCALL_NAME(RENAME)
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NOUX_DECL_SYSCALL_NAME(MKDIR)
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case SYSCALL_INVALID: return 0;
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}
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return 0;
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}
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/**
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* Perform syscall
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*
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* The syscall arguments and results are communicated via the shared
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* sysio dataspace.
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*
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* \return true on success
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*/
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virtual bool syscall(Syscall syscall) = 0;
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/*********************
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** RPC declaration **
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*********************/
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GENODE_RPC(Rpc_sysio_dataspace, Dataspace_capability, sysio_dataspace);
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GENODE_RPC(Rpc_syscall, bool, syscall, Syscall);
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GENODE_RPC_INTERFACE(Rpc_sysio_dataspace, Rpc_syscall);
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};
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}
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#undef NOUX_DECL_SYSCALL_NAME
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#endif /* _INCLUDE__NOUX_SESSION__NOUX_SESSION_H_ */
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