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 #include <string.h> 49 50 #define DEFNICE 10 51 52 /* ARGSUSED */ 53 main(argc, argv) 54 int argc; 55 char **argv; 56 { 57 extern int errno; 58 int niceness; 59 60 if (!argv[1]) 61 usage(); 62 63 niceness = DEFNICE; 64 if (argv[1][0] == '-') 65 if (isdigit(argv[1][1]) || argv[1][1] == '-') { 66 niceness = atoi(argv[1] + 1); 67 ++argv; 68 } 69 else { 70 (void)fprintf(stderr, "nice: illegal option -- %c\n", 71 argv[1][1]); 72 usage(); 73 } 74 75 if (!argv[1]) 76 usage(); 77 78 errno = 0; 79 niceness += getpriority(PRIO_PROCESS, 0); 80 if (errno) { 81 (void)fprintf(stderr, "nice: getpriority: %s\n", 82 strerror(errno)); 83 exit(1); 84 } 85 if (setpriority(PRIO_PROCESS, 0, niceness)) { 86 (void)fprintf(stderr, "nice: setpriority: %s\n", 87 strerror(errno)); 88 exit(1); 89 } 90 execvp(argv[1], &argv[1]); 91 (void)fprintf(stderr, 92 "nice: %s: %s\n", argv[1], strerror(errno)); 93 exit(1); 94 } 95 96 usage() 97 { 98 (void)fprintf(stderr, 99 "nice [ -# ] command [ options ] [ operands ]\n"); 100 exit(1); 101 } 102