1 /* $NetBSD: nice.c,v 1.12 2003/08/07 11:15:24 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1989 The Regents of the University of California. 5 * 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT( 35 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ 36 All rights reserved.\n"); 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90"; 42 #endif 43 __RCSID("$NetBSD: nice.c,v 1.12 2003/08/07 11:15:24 agc Exp $"); 44 #endif /* not lint */ 45 46 #include <sys/types.h> 47 #include <sys/time.h> 48 #include <sys/resource.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <locale.h> 53 #include <ctype.h> 54 #include <errno.h> 55 #include <err.h> 56 #include <unistd.h> 57 58 #define DEFNICE 10 59 60 int main __P((int, char **)); 61 static void usage __P((void)); 62 63 int 64 main(argc, argv) 65 int argc; 66 char **argv; 67 { 68 int niceness = DEFNICE; 69 int c; 70 71 setlocale(LC_ALL, ""); 72 73 /* handle obsolete -number syntax */ 74 if (argc > 1 && argv[1][0] == '-' && 75 isdigit((unsigned char)argv[1][1])) { 76 niceness = atoi (argv[1] + 1); 77 argc--; argv++; 78 } 79 80 while ((c = getopt (argc, argv, "n:")) != -1) { 81 switch (c) { 82 case 'n': 83 niceness = atoi (optarg); 84 break; 85 86 case '?': 87 default: 88 usage(); 89 break; 90 } 91 } 92 argc -= optind; argv += optind; 93 94 if (argc == 0) 95 usage(); 96 97 errno = 0; 98 niceness += getpriority(PRIO_PROCESS, 0); 99 if (errno) { 100 err (1, "getpriority"); 101 /* NOTREACHED */ 102 } 103 if (setpriority(PRIO_PROCESS, 0, niceness)) { 104 warn ("setpriority"); 105 } 106 107 execvp(argv[0], &argv[0]); 108 err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]); 109 /* NOTREACHED */ 110 } 111 112 static void 113 usage() 114 { 115 (void)fprintf(stderr, 116 "usage: nice [ -n increment ] utility [ argument ...]\n"); 117 118 exit(1); 119 } 120