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 1.7 1993/11/19 20:07:13 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 <locale.h> 51 #include <ctype.h> 52 #include <errno.h> 53 #include <err.h> 54 #include <unistd.h> 55 56 #define DEFNICE 10 57 58 static void usage(); 59 60 int 61 main(argc, argv) 62 int argc; 63 char **argv; 64 { 65 int niceness = DEFNICE; 66 int c; 67 68 setlocale(LC_ALL, ""); 69 70 /* handle obsolete -number syntax */ 71 if (argc > 1 && argv[1][0] == '-' && isdigit(argv[1][1])) { 72 niceness = atoi (argv[1] + 1); 73 argc--; argv++; 74 } 75 76 while ((c = getopt (argc, argv, "n:")) != -1) { 77 switch (c) { 78 case 'n': 79 niceness = atoi (optarg); 80 break; 81 82 case '?': 83 default: 84 usage(); 85 break; 86 } 87 } 88 argc -= optind; argv += optind; 89 90 if (argc == 0) 91 usage(); 92 93 errno = 0; 94 niceness += getpriority(PRIO_PROCESS, 0); 95 if (errno) { 96 err (1, "getpriority"); 97 /* NOTREACHED */ 98 } 99 if (setpriority(PRIO_PROCESS, 0, niceness)) { 100 warn ("setpriority"); 101 } 102 103 execvp(argv[0], &argv[0]); 104 err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]); 105 /* NOTREACHED */ 106 } 107 108 static void 109 usage() 110 { 111 (void)fprintf(stderr, 112 "usage: nice [ -n increment ] utility [ argument ...]\n"); 113 114 exit(1); 115 } 116