11590Srgrimes/* 21590Srgrimes * Copyright (c) 1983, 1989, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 4. Neither the name of the University nor the names of its contributors 141590Srgrimes * may be used to endorse or promote products derived from this software 151590Srgrimes * without specific prior written permission. 161590Srgrimes * 171590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271590Srgrimes * SUCH DAMAGE. 281590Srgrimes */ 291590Srgrimes 301590Srgrimes#ifndef lint 3127917Scharnierstatic const char copyright[] = 321590Srgrimes"@(#) Copyright (c) 1983, 1989, 1993\n\ 331590Srgrimes The Regents of the University of California. All rights reserved.\n"; 341590Srgrimes#endif /* not lint */ 351590Srgrimes 36111569Scharnier#if 0 371590Srgrimes#ifndef lint 381590Srgrimesstatic char sccsid[] = "@(#)renice.c 8.1 (Berkeley) 6/9/93"; 39111569Scharnier#endif /* not lint */ 4027917Scharnier#endif 411590Srgrimes 42111569Scharnier#include <sys/cdefs.h> 43111569Scharnier__FBSDID("$FreeBSD$"); 44111569Scharnier 451590Srgrimes#include <sys/types.h> 461590Srgrimes#include <sys/time.h> 471590Srgrimes#include <sys/resource.h> 481590Srgrimes 4927917Scharnier#include <err.h> 5059217Simp#include <errno.h> 5194355Smaxim#include <limits.h> 5294354Smaxim#include <pwd.h> 531590Srgrimes#include <stdio.h> 5427917Scharnier#include <stdlib.h> 5578718Sdd#include <string.h> 561590Srgrimes 5794355Smaximstatic int donice(int, int, int, int); 5894355Smaximstatic int getnum(const char *, const char *, int *); 5994354Smaximstatic void usage(void); 6027917Scharnier 611590Srgrimes/* 621590Srgrimes * Change the priority (nice) of processes 631590Srgrimes * or groups of processes which are already 641590Srgrimes * running. 651590Srgrimes */ 6627917Scharnierint 6794354Smaximmain(int argc, char *argv[]) 681590Srgrimes{ 6994354Smaxim struct passwd *pwd; 7094355Smaxim int errs, incr, prio, which, who; 711590Srgrimes 7294354Smaxim errs = 0; 7394355Smaxim incr = 0; 7494354Smaxim which = PRIO_PROCESS; 7594354Smaxim who = 0; 761590Srgrimes argc--, argv++; 7727917Scharnier if (argc < 2) 7827917Scharnier usage(); 7994355Smaxim if (strcmp(*argv, "-n") == 0) { 8094355Smaxim incr = 1; 8194355Smaxim argc--, argv++; 8294360Smaxim if (argc < 2) 8394355Smaxim usage(); 8494355Smaxim } 8594355Smaxim if (getnum("priority", *argv, &prio)) 8694355Smaxim return (1); 871590Srgrimes argc--, argv++; 881590Srgrimes for (; argc > 0; argc--, argv++) { 891590Srgrimes if (strcmp(*argv, "-g") == 0) { 901590Srgrimes which = PRIO_PGRP; 911590Srgrimes continue; 921590Srgrimes } 931590Srgrimes if (strcmp(*argv, "-u") == 0) { 941590Srgrimes which = PRIO_USER; 951590Srgrimes continue; 961590Srgrimes } 971590Srgrimes if (strcmp(*argv, "-p") == 0) { 981590Srgrimes which = PRIO_PROCESS; 991590Srgrimes continue; 1001590Srgrimes } 1011590Srgrimes if (which == PRIO_USER) { 10296763Stjr if ((pwd = getpwnam(*argv)) != NULL) 10396763Stjr who = pwd->pw_uid; 10497270Stjr else if (getnum("uid", *argv, &who)) { 10597270Stjr errs++; 1061590Srgrimes continue; 10797270Stjr } else if (who < 0) { 10896763Stjr warnx("%s: bad value", *argv); 10997270Stjr errs++; 11096763Stjr continue; 1111590Srgrimes } 1121590Srgrimes } else { 11397270Stjr if (getnum("pid", *argv, &who)) { 11497270Stjr errs++; 11594355Smaxim continue; 11697270Stjr } 1171590Srgrimes if (who < 0) { 11827917Scharnier warnx("%s: bad value", *argv); 11997270Stjr errs++; 1201590Srgrimes continue; 1211590Srgrimes } 1221590Srgrimes } 12394355Smaxim errs += donice(which, who, prio, incr); 1241590Srgrimes } 1251590Srgrimes exit(errs != 0); 1261590Srgrimes} 1271590Srgrimes 12894354Smaximstatic int 12994355Smaximdonice(int which, int who, int prio, int incr) 13027917Scharnier{ 1311590Srgrimes int oldprio; 1321590Srgrimes 13394354Smaxim errno = 0; 13494354Smaxim oldprio = getpriority(which, who); 1351590Srgrimes if (oldprio == -1 && errno) { 13627917Scharnier warn("%d: getpriority", who); 1371590Srgrimes return (1); 1381590Srgrimes } 13994355Smaxim if (incr) 14094355Smaxim prio = oldprio + prio; 14194355Smaxim if (prio > PRIO_MAX) 14294355Smaxim prio = PRIO_MAX; 14394355Smaxim if (prio < PRIO_MIN) 14494355Smaxim prio = PRIO_MIN; 1451590Srgrimes if (setpriority(which, who, prio) < 0) { 14627917Scharnier warn("%d: setpriority", who); 1471590Srgrimes return (1); 1481590Srgrimes } 14996761Stjr fprintf(stderr, "%d: old priority %d, new priority %d\n", who, 15096761Stjr oldprio, prio); 1511590Srgrimes return (0); 1521590Srgrimes} 15394354Smaxim 15494355Smaximstatic int 15594355Smaximgetnum(const char *com, const char *str, int *val) 15694355Smaxim{ 15794355Smaxim long v; 15894355Smaxim char *ep; 15994355Smaxim 16094355Smaxim errno = 0; 16196764Stjr v = strtol(str, &ep, 10); 16294355Smaxim if (v < INT_MIN || v > INT_MAX || errno == ERANGE) { 16394355Smaxim warnx("%s argument %s is out of range.", com, str); 16494355Smaxim return (1); 16594355Smaxim } 16694355Smaxim if (ep == str || *ep != '\0' || errno != 0) { 16794355Smaxim warnx("Bad %s argument: %s.", com, str); 16894355Smaxim return (1); 16994355Smaxim } 17094355Smaxim 17194355Smaxim *val = (int)v; 17294355Smaxim return (0); 17394355Smaxim} 17494355Smaxim 17594354Smaximstatic void 176201382Sedusage(void) 17794354Smaxim{ 17894355Smaxim fprintf(stderr, "%s\n%s\n", 179146466Sru"usage: renice priority [[-p] pid ...] [[-g] pgrp ...] [[-u] user ...]", 180111569Scharnier" renice -n increment [[-p] pid ...] [[-g] pgrp ...] [[-u] user ...]"); 18194354Smaxim exit(1); 18294354Smaxim} 183