1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)nice.c 5.4 (Berkeley) 6/1/90";*/ 42 static char rcsid[] = "$Id: nice.c,v 1.5 1993/08/27 22:30:34 jtc Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/time.h> 46 #include <sys/resource.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <ctype.h> 51 #include <errno.h> 52 #include <err.h> 53 #include <unistd.h> 54 55 #define DEFNICE 10 56 57 static void usage(); 58 59 int 60 main(argc, argv) 61 int argc; 62 char **argv; 63 { 64 int niceness = DEFNICE; 65 int c; 66 67 /* handle obsolete -number syntax */ 68 if (argc > 1 && argv[1][0] == '-' && isdigit(argv[1][1])) { 69 niceness = atoi (argv[1] + 1); 70 argc--; argv++; 71 } 72 73 while ((c = getopt (argc, argv, "n:")) != -1) { 74 switch (c) { 75 case 'n': 76 niceness = atoi (optarg); 77 break; 78 79 case '?': 80 default: 81 usage(); 82 break; 83 } 84 } 85 argc -= optind; argv += optind; 86 87 if (argc == 0) 88 usage(); 89 90 errno = 0; 91 niceness += getpriority(PRIO_PROCESS, 0); 92 if (errno) { 93 err (1, "getpriority"); 94 /* NOTREACHED */ 95 } 96 if (setpriority(PRIO_PROCESS, 0, niceness)) { 97 warn ("setpriority"); 98 } 99 execvp(argv[0], &argv[0]); 100 err ((errno == ENOENT) ? 127 : 126, argv[0]); 101 } 102 103 static void 104 usage() 105 { 106 (void)fprintf(stderr, 107 "usage: nice [ -n increment ] utility [ argument ...]\n"); 108 109 exit(1); 110 } 111