sys-utils/renice.c

   1 /*
   2  * Copyright (c) 1983, 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34  /* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
  35   * - added Native Language Support
  36   */
  37
  38 #include <sys/types.h>
  39 #include <sys/time.h>
  40 #include <sys/resource.h>
  41
  42 #include <stdio.h>
  43 #include <pwd.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <errno.h>
  47 #include "nls.h"
  48
  49 int donice(int,int,int);
  50
  51 /*
  52  * Change the priority (nice) of processes
  53  * or groups of processes which are already
  54  * running.
  55  */
  56 int
  57 main(int argc, char **argv)
  58 {
  59         int which = PRIO_PROCESS;
  60         int who = 0, prio, errs = 0;
  61
  62         setlocale(LC_ALL, "");
  63         bindtextdomain(PACKAGE, LOCALEDIR);
  64         textdomain(PACKAGE);
  65
  66         argc--, argv++;
  67         if (argc < 2) {
  68                 fprintf(stderr, _("usage: renice priority [ [ -p ] pids ] "
  69                                   "[ [ -g ] pgrps ] [ [ -u ] users ]\n"));
  70                 exit(1);
  71         }
  72         prio = atoi(*argv);
  73         argc--, argv++;
  74         if (prio > PRIO_MAX)
  75                 prio = PRIO_MAX;
  76         if (prio < PRIO_MIN)
  77                 prio = PRIO_MIN;
  78         for (; argc > 0; argc--, argv++) {
  79                 if (strcmp(*argv, "-g") == 0) {
  80                         which = PRIO_PGRP;
  81                         continue;
  82                 }
  83                 if (strcmp(*argv, "-u") == 0) {
  84                         which = PRIO_USER;
  85                         continue;
  86                 }
  87                 if (strcmp(*argv, "-p") == 0) {
  88                         which = PRIO_PROCESS;
  89                         continue;
  90                 }
  91                 if (which == PRIO_USER) {
  92                         register struct passwd *pwd = getpwnam(*argv);
  93
  94                         if (pwd == NULL) {
  95                                 fprintf(stderr, _("renice: %s: unknown user\n"),
  96                                         *argv);
  97                                 continue;
  98                         }
  99                         who = pwd->pw_uid;
 100                 } else {
 101                         who = atoi(*argv);
 102                         if (who < 0) {
 103                                 fprintf(stderr, _("renice: %s: bad value\n"),
 104                                         *argv);
 105                                 continue;
 106                         }
 107                 }
 108                 errs += donice(which, who, prio);
 109         }
 110         return (errs != 0);
 111 }
 112
 113 int
 114 donice(which, who, prio)
 115         int which, who, prio;
 116 {
 117         int oldprio;
 118
 119         errno = 0, oldprio = getpriority(which, who);
 120         if (oldprio == -1 && errno) {
 121                 fprintf(stderr, "renice: %d: ", who);
 122                 perror(_("getpriority"));
 123                 return (1);
 124         }
 125         if (setpriority(which, who, prio) < 0) {
 126                 fprintf(stderr, "renice: %d: ", who);
 127                 perror(_("setpriority"));
 128                 return (1);
 129         }
 130         printf(_("%d: old priority %d, new priority %d\n"), who, oldprio, prio);
 131         return (0);
 132 }