| | 1 | .\" Copyright (c) 1980, 1991, 1993 |
| | 2 | .\" The Regents of the University of California. All rights reserved. |
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| | 10 | .\" notice, this list of conditions and the following disclaimer in the |
| | 11 | .\" documentation and/or other materials provided with the distribution. |
| | 12 | .\" 3. All advertising materials mentioning features or use of this software |
| | 13 | .\" must display the following acknowledgement: |
| | 14 | .\" This product includes software developed by the University of |
| | 15 | .\" California, Berkeley and its contributors. |
| | 16 | .\" 4. Neither the name of the University nor the names of its contributors |
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| | 20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| | 32 | .\" @(#)sync.8 8.1 (Berkeley) 5/31/93 |
| | 33 | .\" |
| | 34 | .Dd May 31, 1993 |
| | 35 | .Dt SYNC 8 |
| | 36 | .Os BSD 4 |
| | 37 | .Sh NAME |
| | 38 | .Nm sync |
| | 39 | .Nd force completion of pending disk writes (flush cache) |
| | 40 | .Sh SYNOPSIS |
| | 41 | .Nm sync |
| | 42 | .Sh DESCRIPTION |
| | 43 | .Nm Sync |
| | 44 | can be called to insure that all disk writes have been completed before the |
| | 45 | processor is halted in a way not suitably done by |
| | 46 | .Xr reboot 8 |
| | 47 | or |
| | 48 | .Xr halt 8 . |
| | 49 | Generally, it is preferable to use |
| | 50 | .Xr reboot |
| | 51 | or |
| | 52 | .Xr halt |
| | 53 | to shut down the system, |
| | 54 | as they may perform additional actions |
| | 55 | such as resynchronizing the hardware clock |
| | 56 | and flushing internal caches before performing a final |
| | 57 | .Nm sync . |
| | 58 | .Pp |
| | 59 | .Nm Sync |
| | 60 | utilizes the |
| | 61 | .Xr sync 2 |
| | 62 | function call. |
| | 63 | .Sh SEE ALSO |
| | 64 | .Xr sync 2 , |
| | 65 | .Xr fsync 2 , |
| | 66 | .Xr halt 8 , |
| | 67 | .Xr reboot 8 , |
| | 68 | .Xr update 8 |
| | 69 | .Sh HISTORY |
| | 70 | A |
| | 71 | .Nm sync |
| | 72 | command appeared in |
| | 73 | .At v6 . |
projects / apple / system_cmds.git / blame_incremental