105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/* $OpenBSD: nice.c,v 1.17 2016/10/28 07:22:59 schwarze Exp $ */
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/* $NetBSD: nice.c,v 1.9 1995/08/31 23:30:58 jtc 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/resource.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define DEFNICE 10
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static void __dead usage(void);
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int
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main(int argc, char *argv[])
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{
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const char *errstr;
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int prio = DEFNICE;
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int c;
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if (pledge("stdio exec proc", NULL) == -1)
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err(1, "pledge");
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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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prio = strtonum(argv[1] + 1, PRIO_MIN, PRIO_MAX, &errstr);
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if (errstr)
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errx(1, "increment is %s", errstr);
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argc--;
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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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prio = strtonum(optarg, PRIO_MIN, PRIO_MAX, &errstr);
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if (errstr)
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errx(1, "increment is %s", errstr);
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break;
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default:
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usage();
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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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prio += getpriority(PRIO_PROCESS, 0);
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if (errno)
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err(1, "getpriority");
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if (setpriority(PRIO_PROCESS, 0, prio))
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warn("setpriority");
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if (pledge("stdio exec", NULL) == -1)
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err(1, "pledge");
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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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}
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static void __dead
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usage(void)
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{
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extern char *__progname;
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fprintf(stderr, "usage: %s [-n increment] utility [argument ...]\n",
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__progname);
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exit(1);
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}
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