d37082b292
Replaces commands/nice. No Minix-specific changes needed. Change-Id: I3e089497dcd86893aa28e3a973496af5b1689f45
124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/* $NetBSD: nice.c,v 1.15 2008/07/21 14:19:24 lukem 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("@(#) Copyright (c) 1989\
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The Regents of the University of California. All rights reserved.");
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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 1.15 2008/07/21 14:19:24 lukem Exp $");
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#endif /* not lint */
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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 <limits.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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static void usage(void) __dead;
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int
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main(int argc, char **argv)
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{
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char *ep;
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int niceness = DEFNICE;
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int c;
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long tmp;
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setprogname(argv[0]);
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(void)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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errno = 0;
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tmp = strtol(optarg, &ep, 10);
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if (*ep != '\0' || tmp < INT_MIN || tmp > INT_MAX)
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errx(EXIT_FAILURE, "invalid argument: `%s'",
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optarg);
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niceness = (int)tmp;
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break;
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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;
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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(EXIT_FAILURE, "getpriority");
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/* NOTREACHED */
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}
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if (setpriority(PRIO_PROCESS, 0, niceness) == -1) {
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warn("setpriority");
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}
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(void)execvp(argv[0], &argv[0]);
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err((errno == ENOENT || errno == ENOTDIR) ? 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(void)
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{
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(void)fprintf(stderr,
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"Usage: %s [ -n increment ] utility [ argument ...]\n",
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getprogname());
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exit(EXIT_FAILURE);
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}
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