POSIX File-system related functionality.
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#include <vfs.h>
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virtual cxx::Ref_ptr< File > | get_file (int fd) noexcept=0 |
| Get the L4Re::Vfs::File for the file descriptor fd.
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virtual cxx::Ref_ptr< File > | get_root () noexcept=0 |
| Get the directory object for the application's root directory.
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virtual cxx::Ref_ptr< File > | get_cwd () noexcept |
| Get the directory object for the application's current working directory.
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virtual void | set_cwd (cxx::Ref_ptr< File > const &) noexcept |
| Set the current working directory for the application.
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virtual int | alloc_fd (cxx::Ref_ptr< File > const &f=cxx::Ref_ptr<>::Nil) noexcept=0 |
| Allocate the next free file descriptor.
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virtual cxx::Pair< cxx::Ref_ptr< File >, int > | set_fd (int fd, cxx::Ref_ptr< File > const &f=cxx::Ref_ptr<>::Nil) noexcept=0 |
| Set the file object referenced by the file descriptor fd.
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virtual cxx::Ref_ptr< File > | free_fd (int fd) noexcept=0 |
| Free the file descriptor fd.
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virtual int | mount (char const *path, cxx::Ref_ptr< File > const &dir) noexcept=0 |
| Mount a given file object at the given global path in the VFS.
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int | mount (char const *source, char const *target, char const *fstype, unsigned long mountflags, void const *data) noexcept |
| Backend for the POSIX mount call.
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POSIX File-system related functionality.
- Note
- This class usually exists as a singleton and as a superclass of L4Re::Vfs::Ops (
- See also
- L4Re::Vfs::vfs_ops).
Definition at line 920 of file vfs.h.
◆ alloc_fd()
Allocate the next free file descriptor.
- Parameters
-
f | The file to assign to that file descriptor. |
- Returns
- The allocated file descriptor, or -EMFILE on error.
◆ free_fd()
Free the file descriptor fd.
- Parameters
-
fd | The file descriptor to free. |
- Returns
- A pointer to the file object that was assigned to the fd.
◆ get_file()
Get the L4Re::Vfs::File for the file descriptor fd.
- Parameters
-
fd | The POSIX file descriptor number. |
- Returns
- A pointer to the File object, or 0 if fd is not open.
◆ mount()
virtual int L4Re::Vfs::Fs::mount |
( |
char const * |
path, |
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cxx::Ref_ptr< File > const & |
dir |
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) |
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pure virtualnoexcept |
Mount a given file object at the given global path in the VFS.
- Parameters
-
path | The global path to mount dir at. |
dir | A pointer to the file/directory object that shall be mounted at path. |
- Returns
- 0 on success, or <0 on error.
◆ set_fd()
Set the file object referenced by the file descriptor fd.
- Parameters
-
fd | The file descriptor to set to f. |
f | The file object to assign. |
- Returns
- A pair of a pointer to the file object that was previously assigned to fd (
first
) and a return value (second
). second
contains -#EBADF
if the passed file descriptor is outside the valid range. first
contains a Nil pointer in that case. On success, second
contains 0.
The documentation for this class was generated from the following files: