Changeset 2b88074b in mainline for uspace/srv/vfs/vfs.h

Timestamp:

2009-10-29T22:06:46Z (15 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

2e983c7

Parents:

14ecd6c

Message:

vfs: file descriptors housekeeping changes

• add support for allocating new file descriptors from the end of the fd range (O_DESC)
• add support for assigning of an already opened file to a free file descriptor

vfs: VFS_OUT_CLOSE is called only when the file reference count is about to drop to zero
vfs: implement VFS_IN_DUP

libc: optimize current working directory housekeeping

• using opendir() was an overkill
• allocate current working directory file descriptor from the end of the fd range using O_DESC (so it doesn't mess with the well-known descriptors 0, 1 and 2)

libc: implement dup2() (via VFS_IN_DUP)

getvc: change stdin/stdout/stderr by a slightly more elegant way (using dup2())

File:

• uspace/srv/vfs/vfs.h (modified) (2 diffs)

uspace/srv/vfs/vfs.h

@@ -186 +186 @@
 extern bool vfs_files_init(void);
 extern vfs_file_t *vfs_file_get(int);
-extern int vfs_fd_alloc(void);
+extern int vfs_fd_assign(vfs_file_t *file, int fd);
+extern int vfs_fd_alloc(bool desc);
 extern int vfs_fd_free(int);
 
@@ -200 +201 @@
 extern void vfs_open_node(ipc_callid_t, ipc_call_t *);
 extern void vfs_sync(ipc_callid_t, ipc_call_t *);
+extern void vfs_dup(ipc_callid_t, ipc_call_t *);
 extern void vfs_close(ipc_callid_t, ipc_call_t *);
 extern void vfs_read(ipc_callid_t, ipc_call_t *);