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Annotation of 43BSDTahoe/man/man2/fsync.2, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1983 Regents of the University of California.
                      2: .\" All rights reserved.  The Berkeley software License Agreement
                      3: .\" specifies the terms and conditions for redistribution.
                      4: .\"
                      5: .\"    @(#)fsync.2     6.4 (Berkeley) 5/22/86
                      6: .\"
                      7: .TH FSYNC 2 "May 22, 1986"
                      8: .UC 5
                      9: .SH NAME
                     10: fsync \- synchronize a file's in-core state with that on disk
                     11: .SH SYNOPSIS
                     12: .ft B
                     13: fsync(fd)
                     14: .br
                     15: int fd;
                     16: .ft R
                     17: .SH DESCRIPTION
                     18: .I Fsync
                     19: causes all modified data and attributes of \fIfd\fP
                     20: to be moved to a permanent storage device.
                     21: This normally results in all in-core modified copies
                     22: of buffers for the associated file to be written to a disk.
                     23: .PP
                     24: .I Fsync
                     25: should be used by programs that require a file to be
                     26: in a known state, for example, in building a simple transaction
                     27: facility.
                     28: .SH "RETURN VALUE
                     29: A 0 value is returned on success.  A \-1 value indicates
                     30: an error.
                     31: .SH "ERRORS
                     32: The \fIfsync\fP fails if:
                     33: .TP 15
                     34: [EBADF]
                     35: \fIFd\fP is not a valid descriptor.
                     36: .TP 15
                     37: [EINVAL]
                     38: \fIFd\fP refers to a socket, not to a file.
                     39: .TP 15
                     40: [EIO]
                     41: An I/O error occurred while reading from or writing to the file system.
                     42: .SH "SEE ALSO"
                     43: sync(2), sync(8), update(8)

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