db/makedb.c

   1 /* makedb -- create simple DB database from textual input.
   2 Copyright (C) 1996 Free Software Foundation, Inc.
   3 This file is part of the GNU C Library.
   4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
   5
   6 The GNU C Library is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU Library General Public License as
   8 published by the Free Software Foundation; either version 2 of the
   9 License, or (at your option) any later version.
  10
  11 The GNU C Library 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 GNU
  14 Library General Public License for more details.
  15
  16 You should have received a copy of the GNU Library General Public
  17 License along with the GNU C Library; see the file COPYING.LIB.  If
  18 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #include <db.h>
  22 #include <ctype.h>
  23 #include <errno.h>
  24 #include <error.h>
  25 #include <fcntl.h>
  26 #include <getopt.h>
  27 #include <libintl.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 /* Get libc version number.  */
  33 #include "../version.h"
  34
  35
  36 /* Long options.  */
  37 static const struct option long_options[] =
  38 {
  39   { "help", no_argument, NULL, 'h' },
  40   { "fold-case", no_argument, NULL, 'f' },
  41   { "output", required_argument, NULL, 'o' },
  42   { "undo", no_argument, NULL, 'u' },
  43   { "version", no_argument, NULL, 'V' },
  44   { NULL, }
  45 };
  46
  47 /* Prototypes for local functions.  */
  48 static void usage __P ((int status)) __attribute__ ((noreturn));
  49 static int process_input __P ((FILE *input, const char *inname, DB *output,
  50                                int to_lowercase));
  51 static int print_database __P ((DB *db));
  52
  53
  54 int
  55 main (argc, argv)
  56      int argc;
  57      char *argv[];
  58 {
  59   const char *output_name;
  60   const char *input_name;
  61   FILE *input_file;
  62   DB *db_file;
  63   int do_help;
  64   int do_version;
  65   int to_lowercase;
  66   int do_undo;
  67   int status;
  68   int opt;
  69
  70   /* Set locale via LC_ALL.  */
  71   setlocale (LC_ALL, "");
  72
  73   /* Set the text message domain.  */
  74   textdomain (_libc_intl_domainname);
  75
  76   /* Initialize local variables.  */
  77   do_help = 0;
  78   do_version = 0;
  79   to_lowercase = 0;
  80   do_undo = 0;
  81   output_name = NULL;
  82
  83   while ((opt = getopt_long (argc, argv, "fho:uV", long_options, NULL)) != EOF)
  84     switch (opt)
  85       {
  86       case '\0':        /* Long option.  */
  87         break;
  88       case 'h':
  89         do_help = 1;
  90         break;
  91       case 'f':
  92         to_lowercase = 1;
  93         break;
  94       case 'o':
  95         output_name = optarg;
  96         break;
  97       case 'u':
  98         do_undo = 1;
  99         break;
 100       case 'V':
 101         do_version = 1;
 102         break;
 103       default:
 104         usage (EXIT_FAILURE);
 105       }
 106
 107   /* Version information is requested.  */
 108   if (do_version)
 109     printf ("%s - GNU %s %s\n", program_invocation_name, "libc", VERSION);
 110
 111   /* Help is requested.  */
 112   if (do_help)
 113     usage (EXIT_SUCCESS);
 114   else if (do_version)
 115     exit (EXIT_SUCCESS);
 116
 117   /* Determine file names.  */
 118   if (do_undo || output_name != NULL)
 119     {
 120       if (optind + 1 != argc)
 121         {
 122         wrong_arguments:
 123           error (0, 0, gettext ("wrong number of arguments"));
 124           usage (EXIT_FAILURE);
 125         }
 126       input_name = argv[optind];
 127     }
 128   else
 129     {
 130       if (optind + 2 != argc)
 131         goto wrong_arguments;
 132
 133       input_name = argv[optind++];
 134       output_name = argv[optind];
 135     }
 136
 137   /* Special handling if we are asked to print the database.  */
 138   if (do_undo)
 139     {
 140       db_file = dbopen (input_name, O_RDONLY, 0666, DB_BTREE, NULL);
 141       if (db_file == NULL)
 142         error (EXIT_FAILURE, 0, gettext ("cannot open database file `%s': %s"),
 143                input_name,
 144                errno == EFTYPE ? gettext ("incorrectly formatted file")
 145                                : strerror (errno));
 146
 147       status = print_database (db_file);
 148
 149       db_file->close (db_file);
 150
 151       return status;
 152     }
 153
 154   /* Open input file.  */
 155   if (strcmp (input_name, "-") == 0 || strcmp (input_name, "/dev/stdin") == 0)
 156     input_file = stdin;
 157   else
 158     {
 159       input_file = fopen (input_name, "r");
 160       if (input_file == NULL)
 161         error (EXIT_FAILURE, errno, gettext ("cannot open input file `%s'"),
 162                input_name);
 163     }
 164
 165   /* Open output file.  This must not be standard output so we don't
 166      handle "-" and "/dev/stdout" special.  */
 167   db_file = dbopen (output_name, O_CREAT | O_RDWR | O_TRUNC, 0666,
 168                     DB_BTREE, NULL);
 169   if (db_file == NULL)
 170     error (EXIT_FAILURE, errno, gettext ("cannot open output file `%s'"));
 171
 172   /* Start the real work.  */
 173   status = process_input (input_file, input_name, db_file, to_lowercase);
 174
 175   /* Close files.  */
 176   if (input_file != stdin)
 177     fclose (input_file);
 178   db_file->close (db_file);
 179
 180   return status;
 181 }
 182
 183
 184 static void
 185 usage (status)
 186      int status;
 187 {
 188   if (status != EXIT_SUCCESS)
 189     fprintf (stderr, gettext ("Try `%s --help' for more information.\n"),
 190              program_invocation_name);
 191   else
 192     printf (gettext ("\
 193 Usage: %s [OPTION]... INPUT-FILE OUTPUT-FILE\n\
 194        %s [OPTION]... -o OUTPUT-FILE INPUT-FILE\n\
 195        %s [OPTION]... -u INPUT-FILE\n\
 196 Mandatory arguments to long options are mandatory for short options too.\n\
 197   -f, --fold-case     convert key to lower case\n\
 198   -h, --help          display this help and exit\n\
 199   -o, --output=NAME   write output to file NAME\n\
 200   -u, --undo          print content of database file, one entry a line\n\
 201   -V, --version       output version information and exit\n\
 202 If INPUT-FILE is -, input is read from standard input.\n"),
 203             program_invocation_name, program_invocation_name,
 204             program_invocation_name);
 205
 206   exit (status);
 207 }
 208
 209
 210 static int
 211 process_input (input, inname, output, to_lowercase)
 212      FILE *input;
 213      const char *inname;
 214      DB *output;
 215      int to_lowercase;
 216 {
 217   char *line;
 218   size_t linelen;
 219   int status;
 220   size_t linenr;
 221
 222   line = NULL;
 223   linelen = 0;
 224   status = EXIT_SUCCESS;
 225   linenr = 0;
 226
 227   while (!feof (input))
 228     {
 229       DBT key;
 230       DBT val;
 231       char *cp;
 232       int n;
 233
 234       n = getline (&line, &linelen, input);
 235       if (n < 0)
 236         /* This means end of file or some bug.  */
 237         break;
 238       if (n == 0)
 239         /* Short read.  Probably interrupted system call. */
 240         continue;
 241
 242       ++linenr;
 243
 244       if (line[n - 1] == '\n')
 245         /* Remove trailing newline.  */
 246         line[--n] = '\0';
 247
 248       cp = line;
 249       while (isspace (*cp))
 250         ++cp;
 251
 252       if (*cp == '#')
 253         /* First non-space character in line '#': it's a comment.  */
 254         continue;
 255
 256       key.data = cp;
 257       while (*cp != '\0' && !isspace (*cp))
 258         {
 259           if (to_lowercase)
 260             *cp = tolower (*cp);
 261           ++cp;
 262         }
 263
 264       if (key.data == cp)
 265         /* It's an empty line.  */
 266         continue;
 267
 268       key.size = cp - (char *) key.data;
 269
 270       while (isspace (*cp))
 271         ++cp;
 272
 273       val.data = cp;
 274       val.size = &line[n] - cp;
 275
 276       /* Store the value.  */
 277       status = output->put (output, &key, &val, R_NOOVERWRITE);
 278       if (status != 0)
 279         {
 280           if (status == 1)
 281             error_at_line (0, 0, inname, linenr, gettext ("duplicate key"));
 282           else
 283             error (0, errno, gettext ("while writing data base file"));
 284
 285           status = EXIT_FAILURE;
 286           clearerr (input);
 287           break;
 288         }
 289     }
 290
 291   if (ferror (input))
 292     {
 293       error (0, 0, gettext ("problems while reading `%s'"));
 294       status = EXIT_FAILURE;
 295     }
 296
 297   return status;
 298 }
 299
 300
 301 static int
 302 print_database (db)
 303      DB *db;
 304 {
 305   DBT key;
 306   DBT val;
 307   int no_more;
 308
 309   no_more = db->seq (db, &key, &val, R_FIRST);
 310   while (!no_more)
 311     {
 312       printf ("%.*s %.*s\n", (int) key.size, (char *) key.data, (int) val.size,
 313               (char *) val.data);
 314
 315       no_more = db->seq (db, &key, &val, R_NEXT);
 316     }
 317
 318   if (no_more == -1)
 319     {
 320       error (0, errno, gettext ("while reading database"));
 321       return EXIT_FAILURE;
 322     }
 323
 324   return EXIT_SUCCESS;
 325 }