1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)nice.c 8.2 (Berkeley) 4/16/94 31 * $FreeBSD: src/usr.bin/nice/nice.c,v 1.4.2.1 2002/06/18 08:40:28 tjr Exp $ 32 */ 33 34 #include <sys/time.h> 35 #include <sys/resource.h> 36 37 #include <ctype.h> 38 #include <err.h> 39 #include <errno.h> 40 #include <limits.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #define DEFPRIO 4 47 48 static void usage(void); 49 50 int 51 main(int argc, char **argv) 52 { 53 long ioprio = DEFPRIO; 54 int ch; 55 char *ep; 56 57 while ((ch = getopt(argc, argv, "n:")) != -1) { 58 switch (ch) { 59 case 'n': 60 errno = 0; 61 ioprio = strtol(optarg, &ep, 10); 62 if (ep == optarg || *ep != '\0' || errno || 63 ioprio < INT_MIN || ioprio > INT_MAX) 64 errx(1, "%s: invalid ioprio value", optarg); 65 break; 66 default: 67 usage(); 68 } 69 } 70 argc -= optind; 71 argv += optind; 72 73 if (argc == 0) 74 usage(); 75 76 errno = 0; 77 if (ioprio_set(PRIO_PROCESS, 0, (int)ioprio)) 78 warn("ioprio_set"); 79 execvp(*argv, argv); 80 err(errno == ENOENT || errno == ENOTDIR ? 127 : 126, "%s", *argv); 81 } 82 83 static void 84 usage(void) 85 { 86 87 fprintf(stderr, "usage: ioprio [-n priority] utility [argument ...]\n"); 88 exit(1); 89 } 90