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- /*
- * 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[] = "@(#)renice.c 5.3 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- #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);
- }
-