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RocketLink!--> Man page versions: OpenBSD FreeBSD NetBSD RedHat Others

FSYNC(2)                  OpenBSD Programmer's Manual                 FSYNC(2)

     fsync - synchronize a file's in-core state with that on disk

     #include <unistd.h>

     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 modified
     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.

     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 fsync() function call appeared in 4.2BSD.

OpenBSD 2.6                      June 4, 1993                                1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

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Up to: File Access - Operations affecting a file as a whole. (delete files, rename, truncate, etc.)

RocketLink!--> Man page versions: OpenBSD FreeBSD NetBSD RedHat Others

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