FSYNC(2) System Calls FSYNC(2)
fsync - synchronize a file
int fsync (int fd);
fsync causes all modified data and attributes of fd to be moved to a
permanent storage device. This normally results in all in-core modi-
fied copies of buffers for the associated file to be written to a disk.
fsync should be used by programs that require a file to be in a known
state, for example, in building a simple transaction facility.
This call is only needed in special circumstances, as when several dae-
mons are all modifying the same file simultaneously (currently impossi-
ble with existing IIgs filesystems). This call is basically a FlushGS.
A 0 value is returned on success. A -1 value indicates an error.
The fsync fails if:
EBADF Fd is not a valid descriptor.
EINVAL Fd refers to a socket, not to a file.
EIO An I/O error occurred while reading from or writing to
the file system.
sync(2), sync(8), update(8), the GS/OS Reference Manual.
The fsync function call appeared in 4.2BSD.
GNO 22 January 1997 FSYNC(2)
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