[[!meta copyright="Copyright © 1994, 1995, 1996, 1997, 1998, 1999, 2002, 2009 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] [[!meta title="file_sync"]] routine file_sync ( file: file_t; RPT wait: int; omit_metadata: int); Sync the individual file. If `omit_metadata` is set, then it is only necessary for the server to updated the actual contents of the file, not any associated metadata. # Implementation Examples Servers that either don't keep any unsynchronized state (or don't have a backing store at all) can simply `return 0`. Examples: [[translator/nfs]]. ## [[libtrivfs]] Pass the call through to the underlying node. ### [[storeio]] / [[streamio]] Instead of to the underlying node, pass the call through to the backend (device). ## [[libnetfs]] Invoke `netfs_attempt_sync`. ## [[libdiskfs]] Invoke `diskfs_file_update`. # Usage Examples ## [[glibc]] * `fdatasync` `file_syncfs (FD, true, true)` -- invoke it on the passed file descriptor, do wait for completion, do allow omitting to update the associated metadata. * `fsync` `file_syncfs (FD, true, false)` -- invoke it on the passed file descriptor, do wait for completion, don't allow omitting to update the associated metadata.