1 /* $NetBSD: nice.c,v 1.15 2008/07/21 14:19:24 lukem 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("@(#) Copyright (c) 1989\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90"; 41 #endif 42 __RCSID("$NetBSD: nice.c,v 1.15 2008/07/21 14:19:24 lukem Exp $"); 43 #endif /* not lint */ 44 45 #include <sys/time.h> 46 #include <sys/resource.h> 47 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <limits.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 static void usage(void) __dead; 61 62 int 63 main(int argc, char **argv) 64 { 65 char *ep; 66 int niceness = DEFNICE; 67 int c; 68 long tmp; 69 70 setprogname(argv[0]); 71 (void)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 errno = 0; 84 tmp = strtol(optarg, &ep, 10); 85 if (*ep != '\0' || tmp < INT_MIN || tmp > INT_MAX) 86 errx(EXIT_FAILURE, "invalid argument: `%s'", 87 optarg); 88 niceness = (int)tmp; 89 break; 90 default: 91 usage(); 92 break; 93 } 94 } 95 argc -= optind; 96 argv += optind; 97 98 if (argc == 0) 99 usage(); 100 101 errno = 0; 102 niceness += getpriority(PRIO_PROCESS, 0); 103 if (errno) { 104 err(EXIT_FAILURE, "getpriority"); 105 /* NOTREACHED */ 106 } 107 if (setpriority(PRIO_PROCESS, 0, niceness) == -1) { 108 warn("setpriority"); 109 } 110 111 (void)execvp(argv[0], &argv[0]); 112 err((errno == ENOENT || errno == ENOTDIR) ? 127 : 126, "%s", argv[0]); 113 /* NOTREACHED */ 114 } 115 116 static void 117 usage(void) 118 { 119 (void)fprintf(stderr, 120 "Usage: %s [ -n increment ] utility [ argument ...]\n", 121 getprogname()); 122 exit(EXIT_FAILURE); 123 } 124