sync()

ask the filesystem manager to flush buffers to disk

Synopsis:

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

Description:

The sync() function requests that the local filesystem manager, if one exists, start flushing all updated in-memory inodes and blocks in the buffer cache to disk.

The function will likely return before the operation is complete. There's no way to determine when the operation is complete.

Examples:

/*
 * Tell the local Fsys (if any) to start sync'ing
 */
#include <stdlib.h>
#include <unistd.h>

void main()
  {
    sync();
    exit( 0 );
  }

Classification:

UNIX

See also:

fdatasync(), fsync(), qnx_sync(), umount()