1/* $OpenBSD: nice.c,v 1.17 2016/10/28 07:22:59 schwarze Exp $ */ 2/* $NetBSD: nice.c,v 1.9 1995/08/31 23:30:58 jtc Exp $ */ 3 4/* 5 * Copyright (c) 1989 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <sys/resource.h> 34 35#include <ctype.h> 36#include <err.h> 37#include <errno.h> 38#include <stdio.h> 39#include <stdlib.h> 40#include <unistd.h> 41 42#define DEFNICE 10 43 44static void __dead usage(void); 45 46int 47main(int argc, char *argv[]) 48{ 49 const char *errstr; 50 int prio = DEFNICE; 51 int c; 52 53 if (pledge("stdio exec proc", NULL) == -1) 54 err(1, "pledge"); 55 56 /* handle obsolete -number syntax */ 57 if (argc > 1 && argv[1][0] == '-' && 58 isdigit((unsigned char)argv[1][1])) { 59 prio = strtonum(argv[1] + 1, PRIO_MIN, PRIO_MAX, &errstr); 60 if (errstr) 61 errx(1, "increment is %s", errstr); 62 argc--; 63 argv++; 64 } 65 66 while ((c = getopt (argc, argv, "n:")) != -1) { 67 switch (c) { 68 case 'n': 69 prio = strtonum(optarg, PRIO_MIN, PRIO_MAX, &errstr); 70 if (errstr) 71 errx(1, "increment is %s", errstr); 72 break; 73 default: 74 usage(); 75 } 76 } 77 argc -= optind; 78 argv += optind; 79 80 if (argc == 0) 81 usage(); 82 83 errno = 0; 84 prio += getpriority(PRIO_PROCESS, 0); 85 if (errno) 86 err(1, "getpriority"); 87 if (setpriority(PRIO_PROCESS, 0, prio)) 88 warn("setpriority"); 89 90 if (pledge("stdio exec", NULL) == -1) 91 err(1, "pledge"); 92 93 execvp(argv[0], &argv[0]); 94 err((errno == ENOENT) ? 127 : 126, "%s", argv[0]); 95} 96 97static void __dead 98usage(void) 99{ 100 extern char *__progname; 101 fprintf(stderr, "usage: %s [-n increment] utility [argument ...]\n", 102 __progname); 103 exit(1); 104} 105