projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 5a4fc040 KB |
1 | .\" Copyright (c) 1980, 1991, 1993 |
| 2 | .\" The Regents of the University of California. All rights reserved. | |
| a15750af | 3 | .\" |
| 07a0a16d | 4 | .\" %sccs.include.redist.roff% |
| a15750af | 5 | .\" |
| 5a4fc040 | 6 | .\" @(#)sync.8 8.1 (Berkeley) %G% |
| 0fccfdb8 CL |
7 | .\" |
| 8 | .Dd | |
| 9 | .Dt SYNC 8 | |
| 10 | .Os BSD 4 | |
| 11 | .Sh NAME | |
| 12 | .Nm sync | |
| 07a0a16d | 13 | .Nd force completion of pending disk writes (flush cache) |
| 0fccfdb8 | 14 | .Sh SYNOPSIS |
| 07a0a16d | 15 | .Nm sync |
| 0fccfdb8 | 16 | .Sh DESCRIPTION |
| 07a0a16d | 17 | .Nm Sync |
| b4cfb2d9 | 18 | can be called to insure that all disk writes have been completed before the |
| a15750af | 19 | processor is halted in a way not suitably done by |
| 0fccfdb8 | 20 | .Xr reboot 8 |
| a15750af | 21 | or |
| 0fccfdb8 | 22 | .Xr halt 8 . |
| b4cfb2d9 | 23 | Generally, it is preferable to use |
| 0fccfdb8 | 24 | .Xr reboot |
| b4cfb2d9 | 25 | or |
| 0fccfdb8 | 26 | .Xr halt |
| b4cfb2d9 MK |
27 | to shut down the system, |
| 28 | as they may perform additional actions | |
| 29 | such as resynchronizing the hardware clock | |
| 30 | and flushing internal caches before performing a final | |
| 07a0a16d | 31 | .Nm sync . |
| 0fccfdb8 | 32 | .Pp |
| 07a0a16d | 33 | .Nm Sync |
| 0fccfdb8 CL |
34 | utilizes the |
| 35 | .Xr sync 2 | |
| 36 | function call. | |
| 37 | .Sh SEE ALSO | |
| 38 | .Xr sync 2 , | |
| 39 | .Xr fsync 2 , | |
| 40 | .Xr halt 8 , | |
| 41 | .Xr reboot 8 , | |
| 42 | .Xr update 8 | |
| 43 | .Sh HISTORY | |
| 44 | A | |
| 07a0a16d CL |
45 | .Nm sync |
| 46 | command appeared in | |
| 47 | .At v6 . |