db/makedb.c

   1 /* Create simple DB database from textual input.
   2    Copyright (C) 1996, 1997 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 not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <argp.h>
  22 #include <ctype.h>
  23 #include <db.h>
  24 #include <errno.h>
  25 #include <error.h>
  26 #include <fcntl.h>
  27 #include <libintl.h>
  28 #include <locale.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 /* Get libc version number.  */
  34 #include "../version.h"
  35
  36 #define PACKAGE _libc_intl_domainname
  37
  38 /* If non-zero convert key to lower case.  */
  39 static int to_lowercase;
  40
  41 /* If non-zero print content of input file, one entry per line.  */
  42 static int do_undo;
  43
  44 /* If non-zero do not print informational messages.  */
  45 static int be_quiet;
  46
  47 /* Name of output file.  */
  48 static const char *output_name;
  49
  50 /* Name and version of program.  */
  51 static void print_version (FILE *stream, struct argp_state *state);
  52 void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
  53
  54 /* Definitions of arguments for argp functions.  */
  55 static const struct argp_option options[] =
  56 {
  57   { "fold-case", 'f', NULL, 0, N_("Convert key to lower case") },
  58   { "output", 'o', N_("NAME"), 0, N_("Write output to file NAME") },
  59   { "quiet", 'q', NULL, 0,
  60     N_("Do not print messages while building database") },
  61   { "undo", 'u', NULL, 0,
  62     N_("Print content of database file, one entry a line") },
  63   { NULL, 0, NULL, 0, NULL }
  64 };
  65
  66 /* Short description of program.  */
  67 static const char doc[] = N_("Create simple DB database from textual input.");
  68
  69 /* Strings for arguments in help texts.  */
  70 static const char args_doc[] = N_("\
  71 INPUT-FILE OUTPUT-FILE\n-o OUTPUT-FILE INPUT-FILE\n-u INPUT-FILE");
  72
  73 /* Prototype for option handler.  */
  74 static error_t parse_opt __P ((int key, char *arg, struct argp_state *state));
  75
  76 /* Function to print some extra text in the help message.  */
  77 static char *more_help __P ((int key, const char *text, void *input));
  78
  79 /* Data structure to communicate with argp functions.  */
  80 static struct argp argp =
  81 {
  82   options, parse_opt, args_doc, doc, NULL, more_help
  83 };
  84
  85
  86 /* Prototypes for local functions.  */
  87 static int process_input __P ((FILE *input, const char *inname, DB *output,
  88                                int to_lowercase, int be_quiet));
  89 static int print_database __P ((DB *db));
  90 int main __P ((int argc, char *argv[]));
  91
  92
  93 int
  94 main (argc, argv)
  95      int argc;
  96      char *argv[];
  97 {
  98   const char *input_name;
  99   FILE *input_file;
 100   DB *db_file;
 101   int status;
 102   int remaining;
 103
 104   /* Set locale via LC_ALL.  */
 105   setlocale (LC_ALL, "");
 106
 107   /* Set the text message domain.  */
 108   textdomain (_libc_intl_domainname);
 109
 110   /* Initialize local variables.  */
 111   input_name = NULL;
 112
 113   /* Parse and process arguments.  */
 114   argp_parse (&argp, argc, argv, 0, &remaining, NULL);
 115
 116   /* Determine file names.  */
 117   if (do_undo || output_name != NULL)
 118     {
 119       if (remaining + 1 != argc)
 120         {
 121         wrong_arguments:
 122           error (0, 0, gettext ("wrong number of arguments"));
 123           argp_help (&argp, stdout, ARGP_HELP_SEE,
 124                      program_invocation_short_name);
 125         }
 126       input_name = argv[remaining];
 127     }
 128   else
 129     {
 130       if (remaining + 2 != argc)
 131         goto wrong_arguments;
 132
 133       input_name = argv[remaining++];
 134       output_name = argv[remaining];
 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                           be_quiet);
 175
 176   /* Close files.  */
 177   if (input_file != stdin)
 178     fclose (input_file);
 179   db_file->close (db_file);
 180
 181   return status;
 182 }
 183
 184
 185 /* Handle program arguments.  */
 186 static error_t
 187 parse_opt (int key, char *arg, struct argp_state *state)
 188 {
 189   switch (key)
 190     {
 191     case 'f':
 192       to_lowercase = 1;
 193       break;
 194     case 'o':
 195       output_name = arg;
 196       break;
 197     case 'q':
 198       be_quiet = 1;
 199       break;
 200     case 'u':
 201       do_undo = 1;
 202       break;
 203     default:
 204       return ARGP_ERR_UNKNOWN;
 205     }
 206   return 0;
 207 }
 208
 209
 210 static char *
 211 more_help (int key, const char *text, void *input)
 212 {
 213   switch (key)
 214     {
 215     case ARGP_KEY_HELP_EXTRA:
 216       /* We print some extra information.  */
 217       return strdup (gettext ("\
 218 Report bugs using the `glibcbug' script to <bugs@gnu.ai.mit.edu>.\n"));
 219     default:
 220       break;
 221     }
 222   return (char *) text;
 223 }
 224
 225 /* Print the version information.  */
 226 static void
 227 print_version (FILE *stream, struct argp_state *state)
 228 {
 229   fprintf (stream, "makedb (GNU %s) %s\n", PACKAGE, VERSION);
 230   fprintf (stream, gettext ("\
 231 Copyright (C) %s Free Software Foundation, Inc.\n\
 232 This is free software; see the source for copying conditions.  There is NO\n\
 233 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 234 "), "1996, 1997");
 235   fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
 236 }
 237
 238
 239 static int
 240 process_input (input, inname, output, to_lowercase, be_quiet)
 241      FILE *input;
 242      const char *inname;
 243      DB *output;
 244      int to_lowercase;
 245      int be_quiet;
 246 {
 247   char *line;
 248   size_t linelen;
 249   int status;
 250   size_t linenr;
 251
 252   line = NULL;
 253   linelen = 0;
 254   status = EXIT_SUCCESS;
 255   linenr = 0;
 256
 257   while (!feof (input))
 258     {
 259       DBT key;
 260       DBT val;
 261       char *cp;
 262       int n;
 263
 264       n = getline (&line, &linelen, input);
 265       if (n < 0)
 266         /* This means end of file or some bug.  */
 267         break;
 268       if (n == 0)
 269         /* Short read.  Probably interrupted system call. */
 270         continue;
 271
 272       ++linenr;
 273
 274       if (line[n - 1] == '\n')
 275         /* Remove trailing newline.  */
 276         line[--n] = '\0';
 277
 278       cp = line;
 279       while (isspace (*cp))
 280         ++cp;
 281
 282       if (*cp == '#')
 283         /* First non-space character in line '#': it's a comment.  */
 284         continue;
 285
 286       key.data = cp;
 287       while (*cp != '\0' && !isspace (*cp))
 288         {
 289           if (to_lowercase)
 290             *cp = tolower (*cp);
 291           ++cp;
 292         }
 293
 294       if (key.data == cp)
 295         /* It's an empty line.  */
 296         continue;
 297
 298       key.size = cp - (char *) key.data;
 299
 300       while (isspace (*cp))
 301         ++cp;
 302
 303       val.data = cp;
 304       val.size = &line[n] - cp;
 305
 306       /* Store the value.  */
 307       status = output->put (output, &key, &val, R_NOOVERWRITE);
 308       if (status != 0)
 309         {
 310           if (status == 1)
 311             {
 312               if (!be_quiet)
 313                 error_at_line (0, 0, inname, linenr,
 314                                gettext ("duplicate key"));
 315               /* This is no real error.  Just give a warning.  */
 316               status = 0;
 317             }
 318           else
 319             error (0, errno, gettext ("while writing data base file"));
 320
 321           status = status ? EXIT_FAILURE : EXIT_SUCCESS;
 322
 323           clearerr (input);
 324           break;
 325         }
 326     }
 327
 328   if (ferror (input))
 329     {
 330       error (0, 0, gettext ("problems while reading `%s'"));
 331       status = EXIT_FAILURE;
 332     }
 333
 334   return status;
 335 }
 336
 337
 338 static int
 339 print_database (db)
 340      DB *db;
 341 {
 342   DBT key;
 343   DBT val;
 344   int no_more;
 345
 346   no_more = db->seq (db, &key, &val, R_FIRST);
 347   while (!no_more)
 348     {
 349       printf ("%.*s %.*s\n", (int) key.size, (char *) key.data, (int) val.size,
 350               (char *) val.data);
 351
 352       no_more = db->seq (db, &key, &val, R_NEXT);
 353     }
 354
 355   if (no_more == -1)
 356     {
 357       error (0, errno, gettext ("while reading database"));
 358       return EXIT_FAILURE;
 359     }
 360
 361   return EXIT_SUCCESS;
 362 }