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141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*
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* Copyright (c) 1983, 1989, 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. 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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* 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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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[] = "@(#)renice.c 8.1 (Berkeley) 6/9/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <pwd.h>
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int donice __P((int, int, int));
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static void usage __P((void));
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/*
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* Change the priority (nice) of processes
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* or groups of processes which are already
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* running.
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*/
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int
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main(argc, argv)
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char **argv;
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{
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int which = PRIO_PROCESS;
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int who = 0, prio, errs = 0;
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argc--, argv++;
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if (argc < 2)
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usage();
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prio = atoi(*argv);
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argc--, argv++;
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if (prio > PRIO_MAX)
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prio = PRIO_MAX;
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if (prio < PRIO_MIN)
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prio = PRIO_MIN;
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for (; argc > 0; argc--, argv++) {
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if (strcmp(*argv, "-g") == 0) {
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which = PRIO_PGRP;
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continue;
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}
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if (strcmp(*argv, "-u") == 0) {
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which = PRIO_USER;
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continue;
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}
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if (strcmp(*argv, "-p") == 0) {
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which = PRIO_PROCESS;
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continue;
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}
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if (which == PRIO_USER) {
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register struct passwd *pwd = getpwnam(*argv);
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if (pwd == NULL) {
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warnx("%s: unknown user", *argv);
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continue;
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}
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who = pwd->pw_uid;
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} else {
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who = atoi(*argv);
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if (who < 0) {
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warnx("%s: bad value", *argv);
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continue;
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}
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}
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errs += donice(which, who, prio);
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}
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exit(errs != 0);
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}
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static void
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usage()
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{
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fprintf(stderr,
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"usage: renice priority [ [ -p ] pids ] [ [ -g ] pgrps ] [ [ -u ] users ]\n");
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exit(1);
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}
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int
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donice(which, who, prio)
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int which, who, prio;
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{
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int oldprio;
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errno = 0, oldprio = getpriority(which, who);
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if (oldprio == -1 && errno) {
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warn("%d: getpriority", who);
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return (1);
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}
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if (setpriority(which, who, prio) < 0) {
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warn("%d: setpriority", who);
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return (1);
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}
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printf("%d: old priority %d, new priority %d\n", who, oldprio, prio);
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return (0);
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}
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