gen/FreeBSD/nice.3

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  28 .\"     @(#)nice.3      8.1 (Berkeley) 6/4/93
  29 .\" $FreeBSD: src/lib/libc/gen/nice.3,v 1.12 2007/01/09 00:27:54 imp Exp $
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  31 .Dd June 4, 1993
  32 .Dt NICE 3
  33 .Os
  34 .Sh NAME
  35 .Nm nice
  36 .Nd set program scheduling priority
  37 .Sh LIBRARY
  38 .Lb libc
  39 .Sh SYNOPSIS
  40 .In unistd.h
  41 .Ft int
  42 .Fn nice "int incr"
  43 .Sh DESCRIPTION
  44 .Bf -symbolic
  45 This interface is obsoleted by
  46 .Xr setpriority 2 .
  47 .Ef
  48 .Pp
  49 The
  50 .Fn nice
  51 function obtains the scheduling priority of the process
  52 from the system and sets it to the priority value specified in
  53 .Fa incr .
  54 The priority is a value in the range -20 to 20.
  55 The default priority is 0; lower priorities cause more favorable scheduling.
  56 Only the super-user may lower priorities.
  57 .Pp
  58 Children inherit the priority of their parent processes via
  59 .Xr fork 2 .
  60 .Sh SEE ALSO
  61 .Xr nice 1 ,
  62 .Xr fork 2 ,
  63 .Xr setpriority 2 ,
  64 .Xr renice 8
  65 .Sh HISTORY
  66 A
  67 .Fn nice
  68 syscall appeared in
  69 .At v6 .