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Annotation of 43BSDReno/usr.bin/nice/nice.1, revision 1.1.1.1

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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