1 /* $NetBSD: nice.c,v 1.11 1998/12/19 20:11:20 christos 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. 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( 39 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ 40 All rights reserved.\n"); 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90"; 46 #endif 47 __RCSID("$NetBSD: nice.c,v 1.11 1998/12/19 20:11:20 christos Exp $"); 48 #endif /* not lint */ 49 50 #include <sys/types.h> 51 #include <sys/time.h> 52 #include <sys/resource.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <locale.h> 57 #include <ctype.h> 58 #include <errno.h> 59 #include <err.h> 60 #include <unistd.h> 61 62 #define DEFNICE 10 63 64 int main __P((int, char **)); 65 static void usage __P((void)); 66 67 int 68 main(argc, argv) 69 int argc; 70 char **argv; 71 { 72 int niceness = DEFNICE; 73 int c; 74 75 setlocale(LC_ALL, ""); 76 77 /* handle obsolete -number syntax */ 78 if (argc > 1 && argv[1][0] == '-' && 79 isdigit((unsigned char)argv[1][1])) { 80 niceness = atoi (argv[1] + 1); 81 argc--; argv++; 82 } 83 84 while ((c = getopt (argc, argv, "n:")) != -1) { 85 switch (c) { 86 case 'n': 87 niceness = atoi (optarg); 88 break; 89 90 case '?': 91 default: 92 usage(); 93 break; 94 } 95 } 96 argc -= optind; argv += optind; 97 98 if (argc == 0) 99 usage(); 100 101 errno = 0; 102 niceness += getpriority(PRIO_PROCESS, 0); 103 if (errno) { 104 err (1, "getpriority"); 105 /* NOTREACHED */ 106 } 107 if (setpriority(PRIO_PROCESS, 0, niceness)) { 108 warn ("setpriority"); 109 } 110 111 execvp(argv[0], &argv[0]); 112 err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]); 113 /* NOTREACHED */ 114 } 115 116 static void 117 usage() 118 { 119 (void)fprintf(stderr, 120 "usage: nice [ -n increment ] utility [ argument ...]\n"); 121 122 exit(1); 123 } 124