sync(2) System Calls Manual sync(2)
NAME
sync - Updates all file systems
SYNOPSIS
#include <unistd.h>
void sync (void);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
sync(): XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
DESCRIPTION
The sync() function causes all information in memory that should be on disk to be written out. The writing, although scheduled, is not nec-
essarily complete upon return from the sync() function. Types of information to be written include modified superblocks, inodes, data
blocks, and indirect blocks.
The sync() function should be used by programs that examine a file system, such as the df command and the fsck command.
RELATED INFORMATION
Functions: fsync(2)
Commands: sync(8)
Standards: standards(5) delim off
sync(2)
