1 /* $NetBSD: renice.c,v 1.5 1997/10/19 14:01:38 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 /*static char sccsid[] = "from: @(#)renice.c 8.1 (Berkeley) 6/9/93";*/ 44 __RCSID("$NetBSD: renice.c,v 1.5 1997/10/19 14:01:38 lukem Exp $"); 45 #endif /* not lint */ 46 47 #include <sys/types.h> 48 #include <sys/time.h> 49 #include <sys/resource.h> 50 51 #include <err.h> 52 #include <pwd.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 56 int donice __P((int, int, int)); 57 int main __P((int, char **)); 58 59 /* 60 * Change the priority (nice) of processes 61 * or groups of processes which are already 62 * running. 63 */ 64 int 65 main(argc, argv) 66 int argc; 67 char **argv; 68 { 69 int which = PRIO_PROCESS; 70 int who = 0, prio, errs = 0; 71 72 argc--, argv++; 73 if (argc < 2) { 74 fprintf(stderr, "usage: renice priority [ [ -p ] pids ] "); 75 fprintf(stderr, "[ [ -g ] pgrps ] [ [ -u ] users ]\n"); 76 exit(1); 77 } 78 prio = atoi(*argv); 79 argc--, argv++; 80 if (prio > PRIO_MAX) 81 prio = PRIO_MAX; 82 if (prio < PRIO_MIN) 83 prio = PRIO_MIN; 84 for (; argc > 0; argc--, argv++) { 85 if (strcmp(*argv, "-g") == 0) { 86 which = PRIO_PGRP; 87 continue; 88 } 89 if (strcmp(*argv, "-u") == 0) { 90 which = PRIO_USER; 91 continue; 92 } 93 if (strcmp(*argv, "-p") == 0) { 94 which = PRIO_PROCESS; 95 continue; 96 } 97 if (which == PRIO_USER) { 98 register struct passwd *pwd = getpwnam(*argv); 99 100 if (pwd == NULL) { 101 warnx("%s: unknown user", *argv); 102 continue; 103 } 104 who = pwd->pw_uid; 105 } else { 106 who = atoi(*argv); 107 if (who < 0) { 108 warnx("%s: bad value", *argv); 109 continue; 110 } 111 } 112 errs += donice(which, who, prio); 113 } 114 exit(errs != 0); 115 } 116 117 int 118 donice(which, who, prio) 119 int which, who, prio; 120 { 121 int oldprio; 122 extern int errno; 123 124 errno = 0, oldprio = getpriority(which, who); 125 if (oldprio == -1 && errno) { 126 warn("%d: getpriority", who); 127 return (1); 128 } 129 if (setpriority(which, who, prio) < 0) { 130 warn("%d: setpriority", who); 131 return (1); 132 } 133 printf("%d: old priority %d, new priority %d\n", who, oldprio, prio); 134 return (0); 135 } 136