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Annotation of src/usr.bin/nice/nice.c, Revision 1.17

1.17    ! schwarze    1: /*     $OpenBSD: nice.c,v 1.16 2016/09/04 15:41:23 tb 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: #include <sys/resource.h>
1.17    ! schwarze   34:
        !            35: #include <ctype.h>
        !            36: #include <err.h>
        !            37: #include <errno.h>
1.1       deraadt    38: #include <stdio.h>
                     39: #include <stdlib.h>
                     40: #include <unistd.h>
                     41:
                     42: #define        DEFNICE 10
                     43:
1.16      tb         44: static void __dead usage(void);
1.1       deraadt    45:
                     46: int
1.9       deraadt    47: main(int argc, char *argv[])
1.1       deraadt    48: {
1.14      tedu       49:        const char *errstr;
                     50:        int prio = DEFNICE;
1.1       deraadt    51:        int c;
                     52:
1.15      deraadt    53:        if (pledge("stdio exec proc", NULL) == -1)
                     54:                err(1, "pledge");
                     55:
1.7       deraadt    56:        /* handle obsolete -number syntax */
1.14      tedu       57:        if (argc > 1 && argv[1][0] == '-' &&
                     58:            isdigit((unsigned char)argv[1][1])) {
                     59:                prio = strtonum(argv[1] + 1, PRIO_MIN, PRIO_MAX, &errstr);
                     60:                if (errstr)
                     61:                        errx(1, "increment is %s", errstr);
1.7       deraadt    62:                argc--;
                     63:                argv++;
                     64:        }
1.1       deraadt    65:
                     66:        while ((c = getopt (argc, argv, "n:")) != -1) {
                     67:                switch (c) {
                     68:                case 'n':
1.14      tedu       69:                        prio = strtonum(optarg, PRIO_MIN, PRIO_MAX, &errstr);
                     70:                        if (errstr)
                     71:                                errx(1, "increment is %s", errstr);
1.1       deraadt    72:                        break;
                     73:                default:
                     74:                        usage();
                     75:                }
                     76:        }
1.13      tedu       77:        argc -= optind;
                     78:        argv += optind;
1.1       deraadt    79:
                     80:        if (argc == 0)
                     81:                usage();
                     82:
                     83:        errno = 0;
1.14      tedu       84:        prio += getpriority(PRIO_PROCESS, 0);
1.15      deraadt    85:        if (errno)
1.7       deraadt    86:                err(1, "getpriority");
1.14      tedu       87:        if (setpriority(PRIO_PROCESS, 0, prio))
1.7       deraadt    88:                warn("setpriority");
1.1       deraadt    89:
1.15      deraadt    90:        if (pledge("stdio exec", NULL) == -1)
                     91:                err(1, "pledge");
                     92:
1.1       deraadt    93:        execvp(argv[0], &argv[0]);
1.7       deraadt    94:        err((errno == ENOENT) ? 127 : 126, "%s", argv[0]);
1.1       deraadt    95: }
                     96:
1.16      tb         97: static void __dead
1.9       deraadt    98: usage(void)
1.1       deraadt    99: {
1.4       pvalchev  100:        extern char *__progname;
1.10      sobrado   101:        fprintf(stderr, "usage: %s [-n increment] utility [argument ...]\n",
1.4       pvalchev  102:            __progname);
1.1       deraadt   103:        exit(1);
                    104: }