--- /dev/null
+/*
+ * Copyright (c) 1989, 1993, 1994
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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 <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#define DEFNICE 10
+
+void usage(void);
+
+int
+main(int argc, char *argv[])
+{
+ long niceness = DEFNICE;
+ int ch;
+ char *ep;
+ char arg1[10];
+
+ /* Obsolescent syntax: -number, --number */
+ if (argc >= 2 && argv[1][0] == '-' && (argv[1][1] == '-' ||
+ isdigit((unsigned char)argv[1][1])) && strcmp(argv[1], "--") != 0) {
+ snprintf(arg1, sizeof(arg1), "-n%s", argv[1] + 1);
+ argv[1] = arg1;
+ }
+
+ while ((ch = getopt(argc, argv, "n:")) != -1) {
+ switch (ch) {
+ case 'n':
+ errno = 0;
+ niceness = strtol(optarg, &ep, 10);
+ if (ep == optarg || *ep != '\0' || errno ||
+ niceness < INT_MIN || niceness > INT_MAX) {
+ fprintf(stderr, "%s: invalid nice value", optarg);
+ return 1;
+ }
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc == 0)
+ usage();
+
+ errno = 0;
+ niceness += getpriority(PRIO_PROCESS, 0);
+ if (errno) {
+ perror("getpriority");
+ return 1;
+ }
+ if (setpriority(PRIO_PROCESS, 0, (int)niceness)) {
+ perror("setpriority");
+ return 1;
+ }
+ errno = 0;
+ execvp(*argv, argv);
+ perror("execvp");
+ return 1;
+}
+
+void
+usage(void)
+{
+
+ (void)fprintf(stderr, "usage: nice [-n incr] utility [arguments]\n");
+ exit(1);
+}