projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b5dc1377 CL |
1 | .\" Copyright (c) 1980, 1990 The Regents of the University of California. |
| 2 | .\" All rights reserved. | |
| 36b987e5 | 3 | .\" |
| b5dc1377 | 4 | .\" %sccs.include.redist.man% |
| 36b987e5 | 5 | .\" |
| d0719240 | 6 | .\" @(#)nice.1 6.6 (Berkeley) %G% |
| b5dc1377 | 7 | .\" |
| ee9b0a0a CL |
8 | .Vx |
| 9 | .Vx | |
| b5dc1377 CL |
10 | .Dd |
| 11 | .Dt NICE 1 | |
| 12 | .Os BSD 4 | |
| 13 | .Sh NAME | |
| 14 | .Nm nice | |
| 15 | .Nd execute a command at a low scheduling priority | |
| 16 | .Sh SYNOPSIS | |
| 17 | .Nm nice | |
| 18 | .Oo | |
| 19 | .Op Fl Ar number | |
| 20 | .Oo | |
| 21 | .Ar command | |
| 22 | .Op Ar arguments | |
| 23 | .Sh DESCRIPTION | |
| 24 | .Nm Nice | |
| 25 | runs | |
| 26 | .Ar command | |
| 27 | at a low priority. | |
| 28 | (Think of low and slow). | |
| 29 | If | |
| 30 | .Ar \-number | |
| 31 | is specified, and if it is greater than or equal | |
| 32 | to 10 (the default), | |
| 33 | .Nm nice | |
| 34 | will execute | |
| 35 | .Ar command | |
| 36 | at that priority. | |
| 37 | The upper bound, or lowest priority that | |
| 38 | .Nm nice | |
| 39 | will run a command is 20. | |
| 40 | The lower bounds or | |
| 41 | higher priorities (integers less than 10) | |
| 42 | can only be requested by the super-user. | |
| 43 | Negative numbers are expressed as | |
| 44 | .Ar \-\-number. | |
| 45 | .Pp | |
| 46 | The returned exit status is the exit value from the | |
| 47 | command executed by | |
| 48 | .Nm nice . | |
| 49 | .Sh SEE ALSO | |
| 50 | .Xr csh 1 , | |
| b5dc1377 CL |
51 | .Xr renice 8 |
| 52 | .Sh HISTORY | |
| 53 | .Nm Nice | |
| 54 | appeared in Version 6 AT&T UNIX. | |
| 55 | .Sh BUGS | |
| 56 | .Nm Nice | |
| 1cc467a3 | 57 | is particular to |
| b5dc1377 | 58 | .Xr sh 1 . |
| 36b987e5 | 59 | If you use |
| b5dc1377 | 60 | .Xr csh 1 , |
| 36b987e5 KM |
61 | then commands executed with ``&'' are automatically immune to hangup |
| 62 | signals while in the background. | |
| b5dc1377 CL |
63 | .Pp |
| 64 | .Nm Nice | |
| 36b987e5 | 65 | is built into |
| b5dc1377 | 66 | .Xr csh 1 |
| 36b987e5 KM |
67 | with a slightly different syntax than described here. The form |
| 68 | ``nice +10'' nices to positive nice, and ``nice \-10'' can be used | |
| 69 | by the super-user to give a process more of the processor. |