120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/* $NetBSD: nice.c,v 1.12 2003/08/07 11:15:24 agc Exp $ */
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/*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT(
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"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
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All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)nice.c 5.4 (Berkeley) 6/1/90";
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#endif
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__RCSID("$NetBSD: nice.c,v 1.12 2003/08/07 11:15:24 agc Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <locale.h>
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#include <ctype.h>
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#include <errno.h>
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#include <err.h>
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#include <unistd.h>
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#define DEFNICE 10
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int main __P((int, char **));
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static void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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int niceness = DEFNICE;
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int c;
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setlocale(LC_ALL, "");
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/* handle obsolete -number syntax */
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if (argc > 1 && argv[1][0] == '-' &&
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isdigit((unsigned char)argv[1][1])) {
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niceness = atoi (argv[1] + 1);
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argc--; argv++;
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}
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while ((c = getopt (argc, argv, "n:")) != -1) {
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switch (c) {
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case 'n':
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niceness = atoi (optarg);
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break;
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case '?':
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default:
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usage();
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break;
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}
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}
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argc -= optind; argv += optind;
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if (argc == 0)
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usage();
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errno = 0;
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niceness += getpriority(PRIO_PROCESS, 0);
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if (errno) {
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err (1, "getpriority");
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/* NOTREACHED */
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}
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if (setpriority(PRIO_PROCESS, 0, niceness)) {
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warn ("setpriority");
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}
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execvp(argv[0], &argv[0]);
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err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]);
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/* NOTREACHED */
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}
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static void
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usage()
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{
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(void)fprintf(stderr,
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"usage: nice [ -n increment ] utility [ argument ...]\n");
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exit(1);
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}
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