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1.1 ! root 1: .\" Copyright (c) 1980, 1990 The Regents of the University of California. ! 2: .\" All rights reserved. ! 3: .\" ! 4: .\" Redistribution and use in source and binary forms are permitted provided ! 5: .\" that: (1) source distributions retain this entire copyright notice and ! 6: .\" comment, and (2) distributions including binaries display the following ! 7: .\" acknowledgement: ``This product includes software developed by the ! 8: .\" University of California, Berkeley and its contributors'' in the ! 9: .\" documentation or other materials provided with the distribution and in ! 10: .\" all advertising materials mentioning features or use of this software. ! 11: .\" Neither the name of the University nor the names of its contributors may ! 12: .\" be used to endorse or promote products derived from this software without ! 13: .\" specific prior written permission. ! 14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED ! 15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF ! 16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ! 17: .\" ! 18: .\" @(#)nice.1 6.5 (Berkeley) 7/24/90 ! 19: .\" ! 20: .Dd July 24, 1990 ! 21: .Dt NICE 1 ! 22: .Os BSD 4 ! 23: .Sh NAME ! 24: .Nm nice ! 25: .Nd execute a Bourne shell command at a low scheduling priority ! 26: .Sh SYNOPSIS ! 27: .Nm nice ! 28: .Oo ! 29: .Op Fl Ar number ! 30: .Oo ! 31: .Ar command ! 32: .Op Ar arguments ! 33: .Sh DESCRIPTION ! 34: .Nm Nice ! 35: runs ! 36: .Ar command ! 37: at a low priority. ! 38: (Think of low and slow). ! 39: If ! 40: .Ar \-number ! 41: is specified, and if it is greater than or equal ! 42: to 10 (the default), ! 43: .Nm nice ! 44: will execute ! 45: .Ar command ! 46: at that priority. ! 47: The upper bound, or lowest priority that ! 48: .Nm nice ! 49: will run a command is 20. ! 50: The lower bounds or ! 51: higher priorities (integers less than 10) ! 52: can only be requested by the super-user. ! 53: Negative numbers are expressed as ! 54: .Ar \-\-number. ! 55: .Pp ! 56: The returned exit status is the exit value from the ! 57: command executed by ! 58: .Nm nice . ! 59: .Sh SEE ALSO ! 60: .Xr csh 1 , ! 61: .Xr renice 8 ! 62: .Sh HISTORY ! 63: .Nm Nice ! 64: appeared in Version 6 AT&T UNIX. ! 65: .Sh BUGS ! 66: .Nm Nice ! 67: is particular to ! 68: .Xr sh 1 . ! 69: If you use ! 70: .Xr csh 1 , ! 71: then commands executed with ``&'' are automatically immune to hangup ! 72: signals while in the background. ! 73: .Pp ! 74: .Nm Nice ! 75: is built into ! 76: .Xr csh 1 ! 77: with a slightly different syntax than described here. The form ! 78: ``nice +10'' nices to positive nice, and ``nice \-10'' can be used ! 79: by the super-user to give a process more of the processor.
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