1SYNC(3P)                   POSIX Programmer's Manual                  SYNC(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

13       sync — schedule file system updates
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SYNOPSIS

16       #include <unistd.h>
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18       void sync(void);
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DESCRIPTION

21       The sync() function shall cause all information in memory that  updates
22       file systems to be scheduled for writing out to all file systems.
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24       The  writing,  although  scheduled,  is  not  necessarily complete upon
25       return from sync().
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RETURN VALUE

28       The sync() function shall not return a value.
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ERRORS

31       No errors are defined.
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33       The following sections are informative.
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EXAMPLES

36       None.
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APPLICATION USAGE

39       None.
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RATIONALE

42       None.
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FUTURE DIRECTIONS

45       None.
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SEE ALSO

48       fsync()
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50       The Base Definitions volume of POSIX.1‐2008, <unistd.h>
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53       Portions of this text are reprinted and reproduced in  electronic  form
54       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
55       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
56       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
57       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
58       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
59       event of any discrepancy between this version and the original IEEE and
60       The  Open Group Standard, the original IEEE and The Open Group Standard
61       is the referee document. The original Standard can be  obtained  online
62       at http://www.unix.org/online.html .
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64       Any  typographical  or  formatting  errors that appear in this page are
65       most likely to have been introduced during the conversion of the source
66       files  to  man page format. To report such errors, see https://www.ker‐
67       nel.org/doc/man-pages/reporting_bugs.html .
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71IEEE/The Open Group                  2013                             SYNC(3P)
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