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Annotation of 43BSDReno/lib/libc/sys/fsync.2, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1983 The Regents of the University of California.
                      2: .\" All rights reserved.
                      3: .\"
                      4: .\" Redistribution and use in source and binary forms are permitted provided
                      5: .\" that: (1) source distributions retain this entire copyright notice and
                      6: .\" comment, and (2) distributions including binaries display the following
                      7: .\" acknowledgement:  ``This product includes software developed by the
                      8: .\" University of California, Berkeley and its contributors'' in the
                      9: .\" documentation or other materials provided with the distribution and in
                     10: .\" all advertising materials mentioning features or use of this software.
                     11: .\" Neither the name of the University nor the names of its contributors may
                     12: .\" be used to endorse or promote products derived from this software without
                     13: .\" specific prior written permission.
                     14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     17: .\"
                     18: .\"    @(#)fsync.2     6.6 (Berkeley) 6/23/90
                     19: .\"
                     20: .TH FSYNC 2 "June 23, 1990"
                     21: .UC 5
                     22: .SH NAME
                     23: fsync \- synchronize a file's in-core state with that on disk
                     24: .SH SYNOPSIS
                     25: .ft B
                     26: fsync(fd)
                     27: .br
                     28: int fd;
                     29: .ft R
                     30: .SH DESCRIPTION
                     31: .I Fsync
                     32: causes all modified data and attributes of \fIfd\fP
                     33: to be moved to a permanent storage device.
                     34: This normally results in all in-core modified copies
                     35: of buffers for the associated file to be written to a disk.
                     36: .PP
                     37: .I Fsync
                     38: should be used by programs that require a file to be
                     39: in a known state, for example, in building a simple transaction
                     40: facility.
                     41: .SH "RETURN VALUE
                     42: A 0 value is returned on success.  A \-1 value indicates
                     43: an error.
                     44: .SH "ERRORS
                     45: The \fIfsync\fP fails if:
                     46: .TP 15
                     47: [EBADF]
                     48: \fIFd\fP is not a valid descriptor.
                     49: .TP 15
                     50: [EINVAL]
                     51: \fIFd\fP refers to a socket, not to a file.
                     52: .TP 15
                     53: [EIO]
                     54: An I/O error occurred while reading from or writing to the file system.
                     55: .SH "SEE ALSO"
                     56: sync(2), sync(8), update(8)

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