usr.sbin/mpsutil/mpsutil.c

   1 /*-
   2  * Copyright (c) 2015 Netflix, Inc.
   3  * All rights reserved.
   4  * Written by: Scott Long <scottl@freebsd.org>
   5  *
   6  * Copyright (c) 2008 Yahoo!, Inc.
   7  * All rights reserved.
   8  * Written by: John Baldwin <jhb@FreeBSD.org>
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the author nor the names of any co-contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __RCSID("$FreeBSD$");
  37
  38 #include <sys/param.h>
  39 #include <sys/errno.h>
  40 #include <err.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45 #include "mpsutil.h"
  46
  47 SET_DECLARE(MPS_DATASET(top), struct mpsutil_command);
  48 SET_DECLARE(MPS_DATASET(usage), struct mpsutil_usage);
  49
  50 int mps_unit;
  51 int is_mps;
  52
  53 static void
  54 usage(void)
  55 {
  56         struct mpsutil_usage **cmd;
  57         const char *args, *desc;
  58
  59         fprintf(stderr, "usage: %s [-u unit] <command> ...\n\n", getprogname());
  60         fprintf(stderr, "Commands include:\n");
  61         SET_FOREACH(cmd, MPS_DATASET(usage)) {
  62                 if (*cmd == NULL)
  63                         fprintf(stderr, "\n");
  64                 else
  65                         (*cmd)->handler(&args, &desc);
  66                         if (strncmp((*cmd)->set, "top", 3) == 0)
  67                                 fprintf(stderr, "%s %-30s\t%s\n",
  68                                     (*cmd)->name, args, desc);
  69                         else
  70                                 fprintf(stderr, "%s %s %-30s\t%s\n",
  71                                     (*cmd)->set, (*cmd)->name, args, desc);
  72         }
  73         exit(1);
  74 }
  75
  76 static int
  77 version(int ac, char **av)
  78 {
  79
  80         printf("%s: version %s", MPSUTIL_VERSION, getprogname());
  81 #ifdef DEBUG
  82         printf(" (DEBUG)");
  83 #endif
  84         printf("\n");
  85         return (0);
  86 }
  87
  88 MPS_COMMAND(top, version, version, "", "version")
  89
  90 int
  91 main(int ac, char **av)
  92 {
  93         struct mpsutil_command **cmd;
  94         int ch;
  95
  96         is_mps = !strcmp(getprogname(), "mpsutil");
  97
  98         while ((ch = getopt(ac, av, "u:h?")) != -1) {
  99                 switch (ch) {
 100                 case 'u':
 101                         mps_unit = atoi(optarg);
 102                         break;
 103                 case 'h':
 104                 case '?':
 105                         usage();
 106                         return (1);
 107                 }
 108         }
 109
 110         av += optind;
 111         ac -= optind;
 112
 113         /* getopt() eats av[0], so we can't use mpt_table_handler() directly. */
 114         if (ac == 0) {
 115                 usage();
 116                 return (1);
 117         }
 118
 119         SET_FOREACH(cmd, MPS_DATASET(top)) {
 120                 if (strcmp((*cmd)->name, av[0]) == 0) {
 121                         if ((*cmd)->handler(ac, av))
 122                                 return (1);
 123                         else
 124                                 return (0);
 125                 }
 126         }
 127         warnx("Unknown command %s.", av[0]);
 128         return (1);
 129 }
 130
 131 int
 132 mps_table_handler(struct mpsutil_command **start, struct mpsutil_command **end,
 133     int ac, char **av)
 134 {
 135         struct mpsutil_command **cmd;
 136
 137         if (ac < 2) {
 138                 warnx("The %s command requires a sub-command.", av[0]);
 139                 return (EINVAL);
 140         }
 141         for (cmd = start; cmd < end; cmd++) {
 142                 if (strcmp((*cmd)->name, av[1]) == 0)
 143                         return ((*cmd)->handler(ac - 1, av + 1));
 144         }
 145
 146         warnx("%s is not a valid sub-command of %s.", av[1], av[0]);
 147         return (ENOENT);
 148 }
 149
 150 void
 151 hexdump(const void *ptr, int length, const char *hdr, int flags)
 152 {
 153         int i, j, k;
 154         int cols;
 155         const unsigned char *cp;
 156         char delim;
 157
 158         if ((flags & HD_DELIM_MASK) != 0)
 159                 delim = (flags & HD_DELIM_MASK) >> 8;
 160         else
 161                 delim = ' ';
 162
 163         if ((flags & HD_COLUMN_MASK) != 0)
 164                 cols = flags & HD_COLUMN_MASK;
 165         else
 166                 cols = 16;
 167
 168         cp = ptr;
 169         for (i = 0; i < length; i+= cols) {
 170                 if (hdr != NULL)
 171                         printf("%s", hdr);
 172
 173                 if ((flags & HD_OMIT_COUNT) == 0)
 174                         printf("%04x  ", i);
 175
 176                 if ((flags & HD_OMIT_HEX) == 0) {
 177                         for (j = 0; j < cols; j++) {
 178                                 if (flags & HD_REVERSED)
 179                                         k = i + (cols - 1 - j);
 180                                 else
 181                                         k = i + j;
 182                                 if (k < length)
 183                                         printf("%c%02x", delim, cp[k]);
 184                                 else
 185                                         printf("   ");
 186                         }
 187                 }
 188
 189                 if ((flags & HD_OMIT_CHARS) == 0) {
 190                         printf("  |");
 191                         for (j = 0; j < cols; j++) {
 192                                 if (flags & HD_REVERSED)
 193                                         k = i + (cols - 1 - j);
 194                                 else
 195                                         k = i + j;
 196                                 if (k >= length)
 197                                         printf(" ");
 198                                 else if (cp[k] >= ' ' && cp[k] <= '~')
 199                                         printf("%c", cp[k]);
 200                                 else
 201                                         printf(".");
 202                         }
 203                         printf("|");
 204                 }
 205                 printf("\n");
 206         }
 207 }