3 files changed, 267 insertions, 0 deletions
diff --git a/usr.bin/renice/Makefile b/usr.bin/renice/Makefile
new file mode 100644
index 00000000000..33b999e6533
--- /dev/null
+++ b/usr.bin/renice/Makefile
@@ -0,0 +1,7 @@
+#	from: @(#)Makefile	5.3 (Berkeley) 5/11/90
+#	$Id: Makefile,v 1.1 1995/10/18 08:45:59 deraadt Exp $
+
+PROG=	renice
+MAN=	renice.8
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/renice/renice.8 b/usr.bin/renice/renice.8
new file mode 100644
index 00000000000..9d5d1b440fc
--- /dev/null
+++ b/usr.bin/renice/renice.8
@@ -0,0 +1,132 @@
+.\" Copyright (c) 1983, 1991 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.
+.\"
+.\"     from: @(#)renice.8	6.5 (Berkeley) 3/16/91
+.\"	$Id: renice.8,v 1.1 1995/10/18 08:45:59 deraadt Exp $
+.\"
+.Dd March 16, 1991
+.Dt RENICE 8
+.Os BSD 4
+.Sh NAME
+.Nm renice
+.Nd alter priority of running processes
+.Sh SYNOPSIS
+.Nm renice
+.Ar priority
+.Oo
+.Op Fl p
+.Ar pid ...
+.Oc
+.Oo
+.Op Fl g
+.Ar pgrp ...
+.Oc
+.Oo
+.Op Fl u
+.Ar user ...
+.Oc
+.Sh DESCRIPTION
+.Nm Renice
+alters the 
+scheduling priority of one or more running processes.
+The following
+.Ar who
+parameters are interpreted as process ID's, process group
+ID's, or user names.
+.Nm Renice Ns 'ing
+a process group causes all processes in the process group
+to have their scheduling priority altered.  
+.Nm Renice Ns 'ing
+a user causes all processes owned by the user to have
+their scheduling priority altered.
+By default, the processes to be affected are specified by
+their process ID's.
+.Pp
+Options supported by
+.Nm renice :
+.Bl -tag -width Ds
+.It Fl g
+Force 
+.Ar who
+parameters to be interpreted as process group ID's.
+.It Fl u
+Force the
+.Ar who
+parameters to be interpreted as user names.
+.It Fl p
+Resets the
+.Ar who
+interpretation to be (the default) process ID's.
+.El
+.Pp
+For example,
+.Bd -literal -offset
+renice +1 987 -u daemon root -p 32
+.Ed
+.Pp
+would change the priority of process ID's 987 and 32, and
+all processes owned by users daemon and root.
+.Pp
+Users other than the super-user may only alter the priority of
+processes they own,
+and can only monotonically increase their ``nice value''
+within the range 0 to
+.Dv PRIO_MAX
+(20).
+(This prevents overriding administrative fiats.)
+The super-user
+may alter the priority of any process
+and set the priority to any value in the range
+.Dv PRIO_MIN
+(\-20)
+to
+.Dv PRIO_MAX .
+Useful priorities are:
+20 (the affected processes will run only when nothing else
+in the system wants to),
+0 (the ``base'' scheduling priority),
+anything negative (to make things go very fast).
+.Sh FILES
+.Bl -tag -width /etc/passwd -compact
+.It Pa /etc/passwd
+to map user names to user ID's
+.El
+.Sh SEE ALSO
+.Xr getpriority 2 ,
+.Xr setpriority 2
+.Sh BUGS
+Non super-users can not increase scheduling priorities of their own processes,
+even if they were the ones that decreased the priorities in the first place.
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.0 .
diff --git a/usr.bin/renice/renice.c b/usr.bin/renice/renice.c
new file mode 100644
index 00000000000..aba3c843692
--- /dev/null
+++ b/usr.bin/renice/renice.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 1983 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.
+ */
+
+#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: @(#)renice.c	5.3 (Berkeley) 6/1/90";*/
+static char rcsid[] = "$Id: renice.c,v 1.1 1995/10/18 08:45:59 deraadt Exp $";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <stdio.h>
+#include <pwd.h>
+
+/*
+ * Change the priority (nice) of processes
+ * or groups of processes which are already
+ * running.
+ */
+main(argc, argv)
+	char **argv;
+{
+	int which = PRIO_PROCESS;
+	int who = 0, prio, errs = 0;
+
+	argc--, argv++;
+	if (argc < 2) {
+		fprintf(stderr, "usage: renice priority [ [ -p ] pids ] ");
+		fprintf(stderr, "[ [ -g ] pgrps ] [ [ -u ] users ]\n");
+		exit(1);
+	}
+	prio = atoi(*argv);
+	argc--, argv++;
+	if (prio > PRIO_MAX)
+		prio = PRIO_MAX;
+	if (prio < PRIO_MIN)
+		prio = PRIO_MIN;
+	for (; argc > 0; argc--, argv++) {
+		if (strcmp(*argv, "-g") == 0) {
+			which = PRIO_PGRP;
+			continue;
+		}
+		if (strcmp(*argv, "-u") == 0) {
+			which = PRIO_USER;
+			continue;
+		}
+		if (strcmp(*argv, "-p") == 0) {
+			which = PRIO_PROCESS;
+			continue;
+		}
+		if (which == PRIO_USER) {
+			register struct passwd *pwd = getpwnam(*argv);
+			
+			if (pwd == NULL) {
+				fprintf(stderr, "renice: %s: unknown user\n",
+					*argv);
+				continue;
+			}
+			who = pwd->pw_uid;
+		} else {
+			who = atoi(*argv);
+			if (who < 0) {
+				fprintf(stderr, "renice: %s: bad value\n",
+					*argv);
+				continue;
+			}
+		}
+		errs += donice(which, who, prio);
+	}
+	exit(errs != 0);
+}
+
+donice(which, who, prio)
+	int which, who, prio;
+{
+	int oldprio;
+	extern int errno;
+
+	errno = 0, oldprio = getpriority(which, who);
+	if (oldprio == -1 && errno) {
+		fprintf(stderr, "renice: %d: ", who);
+		perror("getpriority");
+		return (1);
+	}
+	if (setpriority(which, who, prio) < 0) {
+		fprintf(stderr, "renice: %d: ", who);
+		perror("setpriority");
+		return (1);
+	}
+	printf("%d: old priority %d, new priority %d\n", who, oldprio, prio);
+	return (0);
+}