/* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1989, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)nice.c 8.1 (Berkeley) 6/6/93"; #endif /* not lint */ #include <sys/types.h> #include <sys/time.h> #include <sys/resource.h> #include <ctype.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #define DEFNICE 10 void usage __P((void)); int main(argc, argv) int argc; char *argv[]; { int niceness; niceness = DEFNICE; if (argv[1][0] == '-') if (isdigit(argv[1][1])) { niceness = atoi(argv[1] + 1); ++argv; } else { (void)fprintf(stderr, "nice: illegal option -- %c\n", argv[1][1]); usage(); } if (!argv[1]) usage(); errno = 0; niceness += getpriority(PRIO_PROCESS, 0); if (errno) { (void)fprintf(stderr, "nice: getpriority: %s\n", strerror(errno)); exit(1); } if (setpriority(PRIO_PROCESS, 0, niceness)) { (void)fprintf(stderr, "nice: setpriority: %s\n", strerror(errno)); exit(1); } execvp(argv[1], &argv[1]); (void)fprintf(stderr, "nice: %s: %s\n", argv[1], strerror(errno)); exit(1); } void usage() { (void)fprintf(stderr, "nice [ -# ] command [ options ] [ operands ]\n"); exit(1); }