redhat man page for sync

Query: sync

OS: redhat

Section: 2

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

SYNC(2) 						     Linux Programmer's Manual							   SYNC(2)

NAME
sync - commit buffer cache to disk.
SYNOPSIS
#include <unistd.h> void sync(void);
DESCRIPTION
sync first commits inodes to buffers, and then buffers to disk.
CONFORMING TO
SVr4, SVID, X/OPEN, BSD 4.3
BUGS
According to the standard specification (e.g., SVID), sync() schedules the writes, but may return before the actual writing is done. How- ever, since version 1.3.20 Linux does actually wait. (This still does not guarantee data integrity: modern disks have large caches.)
NOTES
Since glibc 2.2.2 the Linux prototype is as listed above, following the various standards. In libc4, libc5, and glibc up to 2.2.1 it was "int sync(void)", and sync always returned 0.
SEE ALSO
bdflush(2), fsync(2), fdatasync(2), update(8), sync(8) Linux 2.4 2001-10-10 SYNC(2)
Related Man Pages
syncfs(2) - linux
sync(2) - centos
syncfs(2) - x11r4
syncfs(2) - xfree86
syncfs(2) - plan9
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