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Annotation of src/usr.bin/nice/nice.c, Revision 1.10

1.10    ! sobrado     1: /*     $OpenBSD: nice.c,v 1.9 2003/06/10 22:20:49 deraadt 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.
1.8       millert    16:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
                     33: #ifndef lint
                     34: char copyright[] =
                     35: "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
                     36:  All rights reserved.\n";
                     37: #endif /* not lint */
                     38:
                     39: #ifndef lint
                     40: #if 0
                     41: static char sccsid[] = "@(#)nice.c     5.4 (Berkeley) 6/1/90";
                     42: #endif
1.10    ! sobrado    43: static char rcsid[] = "$OpenBSD: nice.c,v 1.9 2003/06/10 22:20:49 deraadt Exp $";
1.1       deraadt    44: #endif /* not lint */
                     45:
                     46: #include <sys/time.h>
                     47: #include <sys/resource.h>
                     48: #include <stdio.h>
                     49: #include <stdlib.h>
                     50: #include <locale.h>
                     51: #include <ctype.h>
                     52: #include <errno.h>
                     53: #include <err.h>
                     54: #include <unistd.h>
                     55:
                     56: #define        DEFNICE 10
                     57:
1.6       millert    58: int    main(int, char **);
                     59: static void usage(void);
1.1       deraadt    60:
                     61: int
1.9       deraadt    62: main(int argc, char *argv[])
1.1       deraadt    63: {
                     64:        int niceness = DEFNICE;
                     65:        int c;
                     66:
                     67:        setlocale(LC_ALL, "");
                     68:
1.7       deraadt    69:        /* handle obsolete -number syntax */
                     70:        if (argc > 1 && argv[1][0] == '-' && isdigit(argv[1][1])) {
                     71:                niceness = atoi(argv[1] + 1);
                     72:                argc--;
                     73:                argv++;
                     74:        }
1.1       deraadt    75:
                     76:        while ((c = getopt (argc, argv, "n:")) != -1) {
                     77:                switch (c) {
                     78:                case 'n':
1.7       deraadt    79:                        niceness = atoi(optarg);
1.1       deraadt    80:                        break;
                     81:
                     82:                case '?':
                     83:                default:
                     84:                        usage();
                     85:                        break;
                     86:                }
                     87:        }
                     88:        argc -= optind; argv += optind;
                     89:
                     90:        if (argc == 0)
                     91:                usage();
                     92:
                     93:        errno = 0;
                     94:        niceness += getpriority(PRIO_PROCESS, 0);
                     95:        if (errno) {
1.7       deraadt    96:                err(1, "getpriority");
1.1       deraadt    97:                /* NOTREACHED */
                     98:        }
1.7       deraadt    99:        if (setpriority(PRIO_PROCESS, 0, niceness))
                    100:                warn("setpriority");
1.1       deraadt   101:
                    102:        execvp(argv[0], &argv[0]);
1.7       deraadt   103:        err((errno == ENOENT) ? 127 : 126, "%s", argv[0]);
1.1       deraadt   104:        /* NOTREACHED */
                    105: }
                    106:
                    107: static void
1.9       deraadt   108: usage(void)
1.1       deraadt   109: {
1.4       pvalchev  110:        extern char *__progname;
1.10    ! sobrado   111:        fprintf(stderr, "usage: %s [-n increment] utility [argument ...]\n",
1.4       pvalchev  112:            __progname);
1.1       deraadt   113:        exit(1);
                    114: }