NAME

     sync - commit buffer cache to disk.

SYNOPSIS

     #include <unistd.h>

     int sync(void);

DESCRIPTION

     sync first commits inodes to buffers, and  then  buffers  to
     disk.

RETURN VALUE

     sync always returns 0.

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 writ-
     ing is done.  However, since version 1.3.20 Linux does actu-
     ally  wait.   (This still does not guarantee data integrity:
     modern disks have large caches.)

SEE ALSO

     bdflush(2), fsync(2), fdatasync(2),