diff options
| -rw-r--r-- | usr.sbin/Makefile | 2 | ||||
| -rw-r--r-- | usr.sbin/rtprio/Makefile | 7 | ||||
| -rw-r--r-- | usr.sbin/rtprio/rtprio.1 | 165 | ||||
| -rw-r--r-- | usr.sbin/rtprio/rtprio.c | 141 |
4 files changed, 314 insertions, 1 deletions
diff --git a/usr.sbin/Makefile b/usr.sbin/Makefile index 0588cf4..0a9704f 100644 --- a/usr.sbin/Makefile +++ b/usr.sbin/Makefile @@ -5,7 +5,7 @@ # XXX TEMP. BROKEN: iostat xntpd SUBDIR= accton amd arp chown chroot cron dbsym dev_mkdb diskpart \ edquota inetd kbdcontrol kgmon kvm_mkdb lpr mtree portmap pstat \ - pwd_mkdb quotaon repquota routed rmt rwhod sendmail \ + pwd_mkdb quotaon repquota routed rmt rtprio rwhod sendmail \ sliplogin sysctl syslogd tcpdump traceroute trpt vidcontrol \ vipw ypbind yppoll ypset diff --git a/usr.sbin/rtprio/Makefile b/usr.sbin/rtprio/Makefile new file mode 100644 index 0000000..2ca8da9 --- /dev/null +++ b/usr.sbin/rtprio/Makefile @@ -0,0 +1,7 @@ +# from: @(#)Makefile 5.5 (Berkeley) 5/11/90 +# $Id: Makefile,v 1.2 1993/11/23 00:02:21 jtc Exp $ + +BINDIR=/usr/sbin +PROG= rtprio + +.include <bsd.prog.mk> diff --git a/usr.sbin/rtprio/rtprio.1 b/usr.sbin/rtprio/rtprio.1 new file mode 100644 index 0000000..0b0fa7e --- /dev/null +++ b/usr.sbin/rtprio/rtprio.1 @@ -0,0 +1,165 @@ +.\" +.\" Copyright (c) 1994, Henrik Vestergaard Draboel +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by Henrik Vestergaard Draboel. +.\" 4. The name of the author may not be used to endorse or promote products +.\" derived from this software without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $Id$ +.\" +.Dd July 23, 1994 +.Dt RTPRIO 1 +.Os +.Sh NAME +.Nm rtprio +.Nd execute, examine or modify a utilitys or process realtime scheduling priority +.Sh SYNOPSIS + +.Nm rtprio +.Nm rtprio +.Ar pid +.Nm rtprio +.Ar priority +.Ar command +.Op args +.Nm rtprio +.Ar priority +.Ar -pid +.Nm rtprio +.Ar -t +.Ar command +.Op args +.Nm rtprio +.Ar -t +.Ar -pid +.Sh DESCRIPTION +.Nm Rtprio +is used for controlling realtime process scheduling. A process with a +realtime priority is not subject to priority degradation, and will only +be preempted by another process of equal or higher realtime priority. + +.Nm Rtprio +called without arguments, will return the realtime priority +of the current process. + +If +.Nm rtprio +is called with 1 argument, it will return the realtime priority +of the process with the specified +.Ar pid . + +If +.Ar priority +is specified, the process or program is run at that realtime priority. +If +.Ar -t +is specified, the process or program is run as a normal (non-realtime) +process. + +If +.Ar -pid +is specified, the process with that pid will be modified, else +if +.Ar command +is specified, that program is run with its arguments. + +.Ar Priority +is an integer between 0 (RTPRIO_MIN) and 31 (RTPRIO_MAX). 0 is the +highest priority + +.Ar Pid +of 0 means "the current process". + +Only root is allowed to set realtime priorities. +.Sh RETURN VALUE +.Nm rtprio +returns the (new) realtime priority of the process (see rtprio(2)), or +-1 for all usage errors. +.Sh EXAMPLES +.\LP + +To see which realtime priority the current process is at: +.Bd -literal -offset indent -compact +\fBrtprio\fP +.Ed + +.\.LP +To see which realtime priority of process \fI1423\fP: +.Bd -literal -offset indent -compact +\fBrtprio 1423\fP +.Ed + +.\.LP +To run \fIcron\fP at the lowest realtime priority: +.Bd -literal -offset indent -compact +\fBrtprio 31 cron\fP +.Ed + +.\.LP +To change the realtime priority of process \fI1423\fP to \fI16\fP: +.Bd -literal -offset indent -compact +\fBrtprio 16 -1423\fP +.Ed + +.\.LP +To run \fItcpdump\fP without realtime priority: +.Bd -literal -offset indent -compact +\fBrtprio -t tcpdump\fP +.Ed + +.\.LP +To change the realtime priority of process \fI1423\fP to RTRIO_RTOFF +(no realtime): +.Bd -literal -offset indent -compact +\fBrtprio -t -1423\fP +.Ed +.Sh DIAGNOSTICS +The +.Nm rtprio +utility shall exit with value of the (new) realtime priority of the +program. +.Sh SEE ALSO +.Xr rtprio 2 , +.Xr nice 1 , +.Xr ps 1 , +.Xr nice 2 , +.Xr renice 8 +.Sh HISTORY +The +.Nm rtprio +utility appeared in +FreeBSD 2.0, +but is similar to the HP-UX version. +.Sh BUGS +You can lock you're self out of the system, be placing at cpu-heavy +process in a realtime priority. + +There is no way to set/view the realtime priority of process 0 +(swapper) (see ps(1)). + +Others ... +.Sh AUTHOR +Henrik Vestergaard Draboel - hvd@terry.ping.dk diff --git a/usr.sbin/rtprio/rtprio.c b/usr.sbin/rtprio/rtprio.c new file mode 100644 index 0000000..cc66fd4 --- /dev/null +++ b/usr.sbin/rtprio/rtprio.c @@ -0,0 +1,141 @@ +/* + * Copyright (c) 1994 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* Copyright (c) 1994 Henrik Vestergaard Drabøl (hvd@terry.pping.dk) */ + +#ifndef lint +char copyright[] = +"@(#) Copyright (c) 1989 The Regents of the University of California.\n\ + All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +/*static char sccsid[] = "from: @(#)rtprio.c 5.4 (Berkeley) 6/1/90";*/ +static char rcsid[] = "$Id: rtprio.c,v 1.2 1993/11/23 00:02:23 jtc Exp $"; +#endif /* not lint */ + +#include <sys/time.h> +#include <stdio.h> +#include <sys/rtprio.h> +#include <locale.h> +#include <errno.h> +#include <err.h> + +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <unistd.h> + +static void usage(); + +int +main(argc, argv) + int argc; + char **argv; +{ + int nrtprio = RTPRIO_RTOFF; + int proc=0; + + setlocale(LC_ALL, ""); + errno = 0; + + switch (argc) { + case 2: + proc = abs(atoi(argv[1])); + /* FALLTHROUGH */ + + case 1: + nrtprio = rtprio(proc,RTPRIO_NOCHG); + fprintf(stderr,"rtprio: %d %s\n", + nrtprio, + nrtprio==RTPRIO_RTOFF?"(RTOFF)":""); + exit(nrtprio); + /* NOTREACHED */ + + default: { + switch (argv[1][0]) { + case '-': + if (strcmp(argv[1],"-t")==0) + nrtprio = RTPRIO_RTOFF; + else + usage(); + break; + + case '0':case '1':case '2':case '3':case '4': + case '5':case '6':case '7':case '8':case '9': + nrtprio = atoi (argv[1]); + + if (errno== ERANGE) usage(); + break; + + default: + usage(); + break; + } + switch (argv[2][0]) { + case '-': + proc = -atoi(argv[2]); + + break; + } + + errno = 0; + + nrtprio = rtprio(proc, nrtprio); + + if (errno) { + err (1, "rtprio"); + /* NOTREACHED */ + } + + if (proc == 0) { + execvp(argv[2], &argv[2]); + err ((errno == ENOENT) ? 127 : 126, "%s", argv[2]);} + /* NOTREACHED */ + } + } +return(nrtprio); +} + +static void +usage() +{ + (void)fprintf(stderr, "usage: rtprio\n"); + (void)fprintf(stderr, "usage: rtprio [-] pid\n"); + (void)fprintf(stderr, "usage: rtprio priority command [ args ] \n"); + (void)fprintf(stderr, "usage: rtprio priority -pid \n"); + (void)fprintf(stderr, "usage: rtprio -t command [ args ] \n"); + (void)fprintf(stderr, "usage: rtprio -t -pid \n"); + + exit(-1); +} |
