Importing usr.bin/nice
Replaces commands/nice. No Minix-specific changes needed. Change-Id: I3e089497dcd86893aa28e3a973496af5b1689f45
This commit is contained in:
Thomas Cort
parent
10d6e1a8d2
commit
d37082b292
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@ -16,7 +16,7 @@ SUBDIR= add_route arp ash at backup btrace \
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less loadkeys loadramdisk logger look lp \
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lpd lspci mail MAKEDEV \
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mesg mined mkfifo \
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mount mt netconf nice nohup \
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mount mt netconf nohup \
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nonamed od paste patch \
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ping postinstall poweroff pr prep printroot \
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profile progressbar pr_routes ps pwdauth \
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@ -1,4 +0,0 @@
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PROG= nice
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MAN=
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.include <bsd.prog.mk>
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@ -11,7 +11,7 @@ MAN= ash.1 at.1 \
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last.1 loadfont.1 loadkeys.1 logger.1 \
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look.1 lp.1 lspci.1 mail.1 \
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mesg.1 mixer.1 \
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mkproto.1 mount.1 mt.1 nice.1 nohup.1 od.1 \
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mkproto.1 mount.1 mt.1 nohup.1 od.1 \
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paste.1 ping.1 playwave.1 pr.1 prep.1 \
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profile.1 ps.1 rcp.1 recwave.1 \
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remsync.1 rget.1 rlogin.1 rsh.1 rz.1 \
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@ -1,26 +0,0 @@
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.TH NICE 1
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.SH NAME
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nice \- invoke command with higher or lower scheduling priority
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.SH SYNOPSIS
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\fBnice\fP [\fB\-n\fP increment] \fIutility\fP [\fIargument\fP...]
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.SH DESCRIPTION
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The
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.B nice
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utility runs \fIutility\fP at a different scheduling priority than
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the default. The nicer the process is to others (the higher the
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increment), the less favourable the scheduling is. Super-users
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can give a negative increment, meaning scheduling is more favourable
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than the default.
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.SH OPTIONS
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.TP
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.B \-n \fIincrement
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the increment value sets how nice the invoked command will be. 0 is
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the same priority as regular processes. 10 is the default.
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The range is -20 to 20.
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.SH SEE ALSO
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getpriority(2), setpriority(2)
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.SH AUTHOR
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This
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.B nice
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utility was imported from FreeBSD. This manual page was written
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Ben Gras <beng@few.vu.nl>.
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@ -178,6 +178,7 @@
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2010/10/15 05:46:48,usr.bin/mkdep
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2009/08/15 20:44:56,usr.bin/mktemp
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2012/10/17 12:00:00,usr.bin/nbperf
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2013/10/10 12:00:00,usr.bin/nice
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2012/10/17 12:00:00,usr.bin/nvi
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2010/05/14 17:28:23,usr.bin/newgrp
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2012/10/17 12:00:00,usr.bin/passwd
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@ -18,7 +18,7 @@ SUBDIR= \
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machine make man \
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mkdep mktemp \
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\
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nbperf newgrp nvi \
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nbperf newgrp nice nvi \
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passwd \
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printf \
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rev \
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@ -0,0 +1,6 @@
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# @(#)Makefile 8.1 (Berkeley) 6/6/93
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# $NetBSD: Makefile,v 1.3 1995/08/31 23:30:56 jtc Exp $
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PROG= nice
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.include <bsd.prog.mk>
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@ -0,0 +1,120 @@
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.\" $NetBSD: nice.1,v 1.15 2012/03/22 07:58:19 wiz Exp $
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.\"
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.\" Copyright (c) 1980, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)nice.1 8.1 (Berkeley) 6/6/93
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.\"
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.Dd June 6, 1993
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.Dt NICE 1
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.Os
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.Sh NAME
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.Nm nice
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.Nd execute a utility with an altered scheduling priority
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.Sh SYNOPSIS
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.Nm
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.Op Fl n Ar increment
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.Ar utility
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.Op Ar argument ...
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.Sh DESCRIPTION
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.Nm
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runs
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.Ar utility
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at an altered scheduling priority.
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If an
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.Ar increment
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is given, it is used; otherwise
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an increment of 10 is assumed.
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The super-user can run utilities with priorities higher than normal by using
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a negative
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.Ar increment .
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The priority can be adjusted over a
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range of -20 (the highest) to 20 (the lowest).
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A priority of 19 or 20
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will prevent a process from taking any cycles from others at nice 0 or
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better.
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.Pp
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Available options:
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.Bl -tag -width indent
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.It Fl n Ar increment
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A positive or negative decimal integer used to modify the system scheduling
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priority of
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.Ar utility .
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.El
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.Sh EXIT STATUS
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The
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.Nm
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utility exits with one of the following values:
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.Bl -tag -width indent
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.It 1-125
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An error occurred in the
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.Nm
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utility.
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.It 126
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The
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.Ar utility
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was found but could not be invoked.
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.It 127
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The
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.Ar utility
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could not be found.
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.El
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.Pp
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Otherwise, the exit status of
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.Nm
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will be that of
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.Ar utility .
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.Sh COMPATIBILITY
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The historic
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.Fl Ns Ar increment
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option has been deprecated but is still supported in this implementation.
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.Sh SEE ALSO
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.Xr csh 1 ,
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.Xr getpriority 2 ,
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.Xr setpriority 2 ,
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.Xr renice 8
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.Sh STANDARDS
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The
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.Nm
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utility conforms to
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.St -p1003.2-92 .
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.Sh HISTORY
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A
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.Nm
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utility appeared in
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.At v6 .
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.Sh BUGS
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.Nm
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is built into
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.Xr csh 1
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with a slightly different syntax than described here.
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The form
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.Ql nice +10
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nices to positive nice, and
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.Ql nice \-10
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can be used
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by the super-user to give a process more of the processor.
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@ -1,6 +1,8 @@
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/* $NetBSD: nice.c,v 1.15 2008/07/21 14:19:24 lukem Exp $ */
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/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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@ -10,11 +12,7 @@
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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@ -31,50 +29,67 @@
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* SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1989\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90";
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#endif
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__RCSID("$NetBSD: nice.c,v 1.15 2008/07/21 14:19:24 lukem Exp $");
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#endif /* not lint */
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <limits.h>
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#include <locale.h>
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#include <ctype.h>
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#include <errno.h>
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#include <err.h>
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#include <unistd.h>
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#define DEFNICE 10
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void usage(void);
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static void usage(void) __dead;
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int
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main(int argc, char *argv[])
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main(int argc, char **argv)
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{
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long niceness = DEFNICE;
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int ch;
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char *ep;
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char arg1[10];
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int niceness = DEFNICE;
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int c;
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long tmp;
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/* Obsolescent syntax: -number, --number */
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if (argc >= 2 && argv[1][0] == '-' && (argv[1][1] == '-' ||
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isdigit((unsigned char)argv[1][1])) && strcmp(argv[1], "--") != 0) {
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snprintf(arg1, sizeof(arg1), "-n%s", argv[1] + 1);
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argv[1] = arg1;
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}
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setprogname(argv[0]);
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(void)setlocale(LC_ALL, "");
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while ((ch = getopt(argc, argv, "n:")) != -1) {
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switch (ch) {
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/* handle obsolete -number syntax */
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if (argc > 1 && argv[1][0] == '-' &&
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isdigit((unsigned char)argv[1][1])) {
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niceness = atoi (argv[1] + 1);
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argc--; argv++;
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}
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while ((c = getopt (argc, argv, "n:")) != -1) {
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switch (c) {
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case 'n':
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errno = 0;
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niceness = strtol(optarg, &ep, 10);
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if (ep == optarg || *ep != '\0' || errno ||
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niceness < INT_MIN || niceness > INT_MAX) {
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fprintf(stderr, "%s: invalid nice value", optarg);
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return 1;
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}
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tmp = strtol(optarg, &ep, 10);
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if (*ep != '\0' || tmp < INT_MIN || tmp > INT_MAX)
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errx(EXIT_FAILURE, "invalid argument: `%s'",
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optarg);
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niceness = (int)tmp;
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break;
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default:
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usage();
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break;
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}
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}
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argc -= optind;
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@ -86,23 +101,23 @@ main(int argc, char *argv[])
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errno = 0;
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niceness += getpriority(PRIO_PROCESS, 0);
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if (errno) {
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perror("getpriority");
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return 1;
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err(EXIT_FAILURE, "getpriority");
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/* NOTREACHED */
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}
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if (setpriority(PRIO_PROCESS, 0, (int)niceness)) {
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perror("setpriority");
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return 1;
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if (setpriority(PRIO_PROCESS, 0, niceness) == -1) {
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warn("setpriority");
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}
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errno = 0;
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execvp(*argv, argv);
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perror("execvp");
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return 1;
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(void)execvp(argv[0], &argv[0]);
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err((errno == ENOENT || errno == ENOTDIR) ? 127 : 126, "%s", argv[0]);
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/* NOTREACHED */
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}
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void
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: nice [-n incr] utility [arguments]\n");
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exit(1);
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(void)fprintf(stderr,
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"Usage: %s [ -n increment ] utility [ argument ...]\n",
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getprogname());
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exit(EXIT_FAILURE);
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}
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