Colony » Colony Scout » Colony Scout OS

/*

 * Copyright (c) 1989 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. 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.

 */

#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>

#include <err.h>

#ifdef CMDBOX

#define main(argc, argv)        nice_main(argc, argv)

#endif

#define        DEFNICE        10

static void usage(void);

int

main(int argc, char *argv[])

{

        int niceness = DEFNICE;

        int c;

        /* handle obsolete -number syntax */

        if (argc > 1 && argv[1][0] == '-' &&

            isdigit((unsigned char)argv[1][1])) {

                niceness = atoi (argv[1] + 1);

                argc--; argv++;

        }

        while ((c = getopt (argc, argv, "n:")) != -1) {

                switch (c) {

                case 'n':

                        niceness = atoi (optarg);

                        break;

                case '?':

                default:

                        usage();

                        break;

                }

        }

        argc -= optind; argv += optind;

        if (argc == 0)

                usage();

        errno = 0;

        niceness += getpriority(PRIO_PROCESS, 0);

        if (errno) {

                err (1, "getpriority");

                /* NOTREACHED */

        }

        if (setpriority(PRIO_PROCESS, 0, niceness) == -1) {

                warn ("setpriority");

        }

        execvp(argv[0], &argv[1]);

        err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]);

        /* NOTREACHED */

        return 0;

}

static void

usage()

{

        (void)fprintf(stderr,

            "usage: nice [ -n increment ] utility [ argument ...]\n");

        exit(1);

}