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sync(2) [bsd man page]

SYNC(2) 							System Calls Manual							   SYNC(2)

NAME
sync - update super-block SYNOPSIS
sync() DESCRIPTION
Sync causes all information in core memory that should be on disk to be written out. This includes modified super blocks, modified i- nodes, and delayed block I/O. Sync should be used by programs that examine a file system, for example fsck, df, etc. Sync is mandatory before a boot. SEE ALSO
fsync(2), sync(8), update(8) BUGS
The writing, although scheduled, is not necessarily complete upon return from sync. 4th Berkeley Distribution June 30, 1985 SYNC(2)

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sync(2) 							   System Calls 							   sync(2)

NAME
sync - update super block SYNOPSIS
#include <unistd.h> void sync(void); DESCRIPTION
The sync() function writes all information in memory that should be on disk, including modified super blocks, modified inodes, and delayed block I/O. Unlike fsync(3C), which completes the writing before it returns, sync() schedules but does not necessarily complete the writing before returning. USAGE
The sync() function should be used by applications that examine a file system, such as fsck(1M), and df(1M), and is mandatory before rebooting. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
df(1M), fsck(1M), fsync(3C), attributes(5), standards(5) SunOS 5.11 5 Jul 1990 sync(2)

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