sync - Update all file systems
Interfaces documented on this reference page conform to
industry standards as follows:
sync(): XSH4.2, XSH5.0
Refer to the standards(5) reference page for more information
about industry standards and associated tags.
The sync() function causes all information in memory that
should be on disk to be written out. The writing, although
scheduled, is not necessarily complete upon return from
the sync() function. Types of information to be written
include modified superblocks, inodes, data blocks, and
The sync() function should be used by programs that examine
a file system, such as the df and fsck commands.
[ Back ]