Provided by: manpages-posix-dev_2.16-1_all 
NAME
sync - schedule file system updates
SYNOPSIS
#include <unistd.h> void sync(void);
DESCRIPTION
The sync() function shall cause all information in memory that updates file systems to be scheduled for
writing out to all file systems.
The writing, although scheduled, is not necessarily complete upon return from sync().
RETURN VALUE
The sync() function shall not return a value.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
fsync() , the Base Definitions volume of IEEE Std 1003.1-2001, <unistd.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The
original Standard can be obtained online at http://www.opengroup.org/unix/online.html .