btt/args.c

   1 /*
   2  * blktrace output analysis: generate a timeline & gather statistics
   3  *
   4  * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <getopt.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28
  29 #include "globals.h"
  30
  31 #define S_OPTS  "d:D:e:hlmM:i:o:s:Vv"
  32 static struct option l_opts[] = {
  33         {
  34                 .name = "range-delta",
  35                 .has_arg = required_argument,
  36                 .flag = NULL,
  37                 .val = 'd'
  38         },
  39         {
  40                 .name = "devices",
  41                 .has_arg = required_argument,
  42                 .flag = NULL,
  43                 .val = 'D'
  44         },
  45         {
  46                 .name = "exes",
  47                 .has_arg = required_argument,
  48                 .flag = NULL,
  49                 .val = 'e'
  50         },
  51         {
  52                 .name = "help",
  53                 .has_arg = no_argument,
  54                 .flag = NULL,
  55                 .val = 'h'
  56         },
  57         {
  58                 .name = "lvm",
  59                 .has_arg = no_argument,
  60                 .flag = NULL,
  61                 .val = 'l'
  62         },
  63         {
  64                 .name = "md",
  65                 .has_arg = no_argument,
  66                 .flag = NULL,
  67                 .val = 'm'
  68         },
  69         {
  70                 .name = "dev-maps",
  71                 .has_arg = required_argument,
  72                 .flag = NULL,
  73                 .val = 'M'
  74         },
  75         {
  76                 .name = "input-file",
  77                 .has_arg = required_argument,
  78                 .flag = NULL,
  79                 .val = 'i'
  80         },
  81         {
  82                 .name = "output-file",
  83                 .has_arg = required_argument,
  84                 .flag = NULL,
  85                 .val = 'o'
  86         },
  87         {
  88                 .name = "seeks",
  89                 .has_arg = required_argument,
  90                 .flag = NULL,
  91                 .val = 's'
  92         },
  93         {
  94                 .name = "version",
  95                 .has_arg = no_argument,
  96                 .flag = NULL,
  97                 .val = 'V'
  98         },
  99         {
 100                 .name = "verbose",
 101                 .has_arg = no_argument,
 102                 .flag = NULL,
 103                 .val = 'v'
 104         },
 105         {
 106                 .name = NULL,
 107         }
 108 };
 109
 110 static char usage_str[] = \
 111         "\n[ -d <seconds>     | --range-delta=<seconds> ]\n" \
 112         "[ -e <exe,...>     | --exes=<exe,...>  ]\n" \
 113         "[ -h               | --help ]\n" \
 114         "[ -i <input name>  | --input-file=<input name> ]\n" \
 115         "(-l | -m)          | (--lvm | -md)\n" \
 116         "[ -o <output name> | --output-file=<output name> ]\n" \
 117         "[ -s <output name> | --seeks=<output name> ]\n" \
 118         "[ -V               | --version ]\n" \
 119         "[ -v               | --verbose ]\n\n";
 120
 121 static void usage(char *prog)
 122 {
 123         fprintf(stderr, "Usage: %s %s %s", prog, bt_timeline_version,
 124                 usage_str);
 125 }
 126
 127 void handle_args(int argc, char *argv[])
 128 {
 129         int c;
 130         char *dev_map_fname = NULL;
 131
 132         while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) {
 133                 switch (c) {
 134                 case 'd':
 135                         sscanf(optarg, "%lf", &range_delta);
 136                         break;
 137                 case 'D':
 138                         devices = optarg;
 139                         break;
 140                 case 'e':
 141                         exes = optarg;
 142                         break;
 143                 case 'h':
 144                         usage(argv[0]);
 145                         exit(0);
 146                 case 'i':
 147                         input_name = optarg;
 148                         break;
 149                 case 'l':
 150                         is_lvm = 1;
 151                         break;
 152                 case 'm':
 153                         is_lvm = 0;
 154                         break;
 155                 case 'M':
 156                         dev_map_fname = optarg;
 157                         break;
 158                 case 'o':
 159                         output_name = optarg;
 160                         break;
 161                 case 's':
 162                         seek_name = optarg;
 163                         break;
 164                 case 'v':
 165                         verbose = 1;
 166                         break;
 167                 case 'V':
 168                         printf("%s version %s\n", argv[0], bt_timeline_version);
 169                         exit(0);
 170                 default:
 171                         usage(argv[0]);
 172                         exit(1);
 173                 }
 174         }
 175
 176         if (input_name == NULL || is_lvm < 0) {
 177                 usage(argv[0]);
 178                 exit(1);
 179         }
 180
 181         ifd = open(input_name, O_RDONLY);
 182         if (ifd < 0) {
 183                 perror(input_name);
 184                 exit(1);
 185         }
 186
 187         if (dev_map_fname && dev_map_read(dev_map_fname))
 188                 exit(1);
 189
 190         if (output_name == NULL)
 191                 ranges_ofp = avgs_ofp = stdout;
 192         else {
 193                 char *fname = malloc(sizeof(output_name) + 20);
 194
 195                 sprintf(fname, "%s.dat", output_name);
 196                 ranges_ofp = fopen(fname, "w");
 197                 if (ranges_ofp == NULL) {
 198                         perror(fname);
 199                         exit(1);
 200                 }
 201                 if (verbose)
 202                         printf("Sending range data to %s\n", output_name);
 203
 204                 sprintf(fname, "%s.avg", output_name);
 205                 avgs_ofp = fopen(fname, "w");
 206                 if (avgs_ofp == NULL) {
 207                         perror(fname);
 208                         exit(1);
 209                 }
 210                 if (verbose)
 211                         printf("Sending stats data to %s\n", output_name);
 212
 213                 free(fname);
 214         }
 215 }