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Annotation of src/usr.bin/nice/nice.c, Revision 1.6

1.6     ! millert     1: /*     $OpenBSD: nice.c,v 1.5 2001/09/16 22:40:10 pvalchev Exp $       */
1.1       deraadt     2: /*     $NetBSD: nice.c,v 1.9 1995/08/31 23:30:58 jtc Exp $     */
                      3:
                      4: /*
                      5:  * Copyright (c) 1989 The Regents of the University of California.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *     This product includes software developed by the University of
                     19:  *     California, Berkeley and its contributors.
                     20:  * 4. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  */
                     36:
                     37: #ifndef lint
                     38: char copyright[] =
                     39: "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
                     40:  All rights reserved.\n";
                     41: #endif /* not lint */
                     42:
                     43: #ifndef lint
                     44: #if 0
                     45: static char sccsid[] = "@(#)nice.c     5.4 (Berkeley) 6/1/90";
                     46: #endif
1.6     ! millert    47: static char rcsid[] = "$OpenBSD: nice.c,v 1.5 2001/09/16 22:40:10 pvalchev Exp $";
1.1       deraadt    48: #endif /* not lint */
                     49:
                     50: #include <sys/time.h>
                     51: #include <sys/resource.h>
                     52: #include <stdio.h>
                     53: #include <stdlib.h>
                     54: #include <locale.h>
                     55: #include <ctype.h>
                     56: #include <errno.h>
                     57: #include <err.h>
                     58: #include <unistd.h>
                     59:
                     60: #define        DEFNICE 10
                     61:
1.6     ! millert    62: int    main(int, char **);
        !            63: static void usage(void);
1.1       deraadt    64:
                     65: int
                     66: main(argc, argv)
                     67:        int argc;
                     68:        char **argv;
                     69: {
                     70:        int niceness = DEFNICE;
                     71:        int c;
                     72:
                     73:        setlocale(LC_ALL, "");
                     74:
                     75:         /* handle obsolete -number syntax */
                     76:         if (argc > 1 && argv[1][0] == '-' && isdigit(argv[1][1])) {
                     77:                niceness = atoi (argv[1] + 1);
                     78:                 argc--; argv++;
                     79:         }
                     80:
                     81:        while ((c = getopt (argc, argv, "n:")) != -1) {
                     82:                switch (c) {
                     83:                case 'n':
                     84:                        niceness = atoi (optarg);
                     85:                        break;
                     86:
                     87:                case '?':
                     88:                default:
                     89:                        usage();
                     90:                        break;
                     91:                }
                     92:        }
                     93:        argc -= optind; argv += optind;
                     94:
                     95:        if (argc == 0)
                     96:                usage();
                     97:
                     98:        errno = 0;
                     99:        niceness += getpriority(PRIO_PROCESS, 0);
                    100:        if (errno) {
                    101:                err (1, "getpriority");
                    102:                /* NOTREACHED */
                    103:        }
                    104:        if (setpriority(PRIO_PROCESS, 0, niceness)) {
                    105:                warn ("setpriority");
                    106:        }
                    107:
                    108:        execvp(argv[0], &argv[0]);
                    109:        err ((errno == ENOENT) ? 127 : 126, "%s", argv[0]);
                    110:        /* NOTREACHED */
                    111: }
                    112:
                    113: static void
                    114: usage()
                    115: {
1.4       pvalchev  116:        extern char *__progname;
                    117:        fprintf(stderr, "usage: %s [ -n increment ] utility [ argument ...]\n",
                    118:            __progname);
1.1       deraadt   119:        exit(1);
                    120: }