1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90"; 42 #endif /* not lint */ 43 44 #include <sys/time.h> 45 #include <sys/resource.h> 46 #include <stdio.h> 47 #include <ctype.h> 48 49 #define DEFNICE 10 50 51 /* ARGSUSED */ 52 main(argc, argv) 53 int argc; 54 char **argv; 55 { 56 extern int errno; 57 int niceness; 58 char *strerror(); 59 60 niceness = DEFNICE; 61 if (argv[1][0] == '-') 62 if (isdigit(argv[1][1])) { 63 niceness = atoi(argv[1] + 1); 64 ++argv; 65 } 66 else { 67 (void)fprintf(stderr, "nice: illegal option -- %c\n", 68 argv[1][1]); 69 usage(); 70 } 71 72 if (!argv[1]) 73 usage(); 74 75 errno = 0; 76 niceness += getpriority(PRIO_PROCESS, 0); 77 if (errno) { 78 (void)fprintf(stderr, "nice: getpriority: %s\n", 79 strerror(errno)); 80 exit(1); 81 } 82 if (setpriority(PRIO_PROCESS, 0, niceness)) { 83 (void)fprintf(stderr, 84 "nice: setpriority: %s\n", strerror(errno)); 85 exit(1); 86 } 87 execvp(argv[1], &argv[1]); 88 (void)fprintf(stderr, 89 "nice: %s: %s\n", argv[1], strerror(errno)); 90 exit(1); 91 } 92 93 usage() 94 { 95 (void)fprintf(stderr, 96 "nice [ -# ] command [ options ] [ operands ]\n"); 97 exit(1); 98 } 99