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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/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <ctype.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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#include <string.h>
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#include <err.h>
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#ifdef CMDBOX
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#define main(argc, argv)        nice_main(argc, argv)
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#endif
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#define        DEFNICE        10
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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        int niceness = DEFNICE;
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        int c;
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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) == -1) {
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                warn ("setpriority");
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        }
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        execvp(argv[0], &argv[1]);
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        err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]);
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        /* NOTREACHED */
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        return 0;
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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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}