diff options
Diffstat (limited to 'usr.bin/nice/nice.1')
| -rw-r--r-- | usr.bin/nice/nice.1 | 69 |
1 files changed, 32 insertions, 37 deletions
diff --git a/usr.bin/nice/nice.1 b/usr.bin/nice/nice.1 index 3ed43a3..9948e3a 100644 --- a/usr.bin/nice/nice.1 +++ b/usr.bin/nice/nice.1 @@ -37,40 +37,26 @@ .Os .Sh NAME .Nm nice -.Nd execute a command at a low scheduling priority +.Nd execute a utility at an altered scheduling priority .Sh SYNOPSIS .Nm -.Op Fl Ns Ar number -.Ar command -.Op Ar arguments +.Op Fl n Ar increment +.Ar utility +.Op Ar argument ... .Sh DESCRIPTION The .Nm utility runs -.Ar command -at a low priority. -(Think of low and slow). -If -.Fl Ns Ar number -is not given, -.Nm -assumes the value 10. -The priority is a value in the range -20 to 20. -The default priority is 0, priority 20 is the lowest possible. -The -.Nm -utility will execute -.Ar command -at priority -.Ar number -relative to the priority -of -.Nm . -Higher priorities than the -current process priority can only requested by the -super-user. -Negative numbers are expressed as -.Fl - Ns Ar number . +.Ar utility +at an altered scheduling priority, by incrementing its +.Dq nice +value by the specified +.Ar increment , +or a default value of 10. +The lower the nice value of a process, the higher its scheduling priority. +.Pp +The superuser may specify a negative increment in order to run a utility +with a higher scheduling prority. .Pp Some shells may provide a builtin .Nm @@ -79,32 +65,32 @@ Consult the .Xr builtin 1 manual page. .Sh EXAMPLES -$ nice -5 date +$ nice -n 5 date .Pp -Execute command +Execute utility .Sq date at priority 5 assuming the priority of the shell is 0. .Pp -# nice -16 nice --35 date +# nice -n 16 nice -n -35 date .Pp -Execute command +Execute utility .Sq date at priority -19 assuming the priority of the shell is 0 and you are the super-user. .Sh DIAGNOSTICS If -.Ar command +.Ar utility is invoked, the exit status of .Nm is the exit status of -.Ar command . +.Ar utility . .Pp An exit status of 126 indicates -.Ar command +.Ar utility was found, but could not be executed. An exit status of 127 indicates -.Ar command +.Ar utility could not be found. .Sh SEE ALSO .Xr builtin 1 , @@ -114,8 +100,17 @@ could not be found. .Xr getpriority 2 , .Xr setpriority 2 , .Xr renice 8 +.Sh COMPATIBILITY +The traditional +.Fl Ns Ar increment +option has been deprecated but is still supported. +.Sh STANDARDS +The +.Nm +utility conforms to +.St -p1003.1-2001 . .Sh HISTORY A .Nm -command appeared in +utility appeared in .At v6 . |
