nss/makedb.c

   1 /* Create simple DB database from textual input.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000 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 <dlfcn.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 <stdint.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <sys/stat.h>
  34 #include "nss_db/dummy-db.h"
  35
  36 /* Get libc version number.  */
  37 #include "../version.h"
  38
  39 #define PACKAGE _libc_intl_domainname
  40
  41 /* If non-zero convert key to lower case.  */
  42 static int to_lowercase;
  43
  44 /* If non-zero print content of input file, one entry per line.  */
  45 static int do_undo;
  46
  47 /* If non-zero do not print informational messages.  */
  48 static int be_quiet;
  49
  50 /* Name of output file.  */
  51 static const char *output_name;
  52
  53 /* Name and version of program.  */
  54 static void print_version (FILE *stream, struct argp_state *state);
  55 void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
  56
  57 /* Definitions of arguments for argp functions.  */
  58 static const struct argp_option options[] =
  59 {
  60   { "fold-case", 'f', NULL, 0, N_("Convert key to lower case") },
  61   { "output", 'o', N_("NAME"), 0, N_("Write output to file NAME") },
  62   { "quiet", 'q', NULL, 0,
  63     N_("Do not print messages while building database") },
  64   { "undo", 'u', NULL, 0,
  65     N_("Print content of database file, one entry a line") },
  66   { NULL, 0, NULL, 0, NULL }
  67 };
  68
  69 /* Short description of program.  */
  70 static const char doc[] = N_("Create simple DB database from textual input.");
  71
  72 /* Strings for arguments in help texts.  */
  73 static const char args_doc[] = N_("\
  74 INPUT-FILE OUTPUT-FILE\n-o OUTPUT-FILE INPUT-FILE\n-u INPUT-FILE");
  75
  76 /* Prototype for option handler.  */
  77 static error_t parse_opt (int key, char *arg, struct argp_state *state);
  78
  79 /* Function to print some extra text in the help message.  */
  80 static char *more_help (int key, const char *text, void *input);
  81
  82 /* Data structure to communicate with argp functions.  */
  83 static struct argp argp =
  84 {
  85   options, parse_opt, args_doc, doc, NULL, more_help
  86 };
  87
  88
  89 /* Prototypes for local functions.  */
  90 static int process_input (FILE *input, const char *inname, NSS_DB *output,
  91                           int to_lowercase, int be_quiet);
  92 static int print_database (NSS_DB *db);
  93
  94
  95 int
  96 main (int argc, char *argv[])
  97 {
  98   const char *input_name;
  99   FILE *input_file;
 100   NSS_DB *db_file;
 101   int status;
 102   int remaining;
 103   int mode = 0666;
 104
 105   /* Set locale via LC_ALL.  */
 106   setlocale (LC_ALL, "");
 107
 108   /* Set the text message domain.  */
 109   textdomain (_libc_intl_domainname);
 110
 111   /* Initialize local variables.  */
 112   input_name = NULL;
 113
 114   /* Parse and process arguments.  */
 115   argp_parse (&argp, argc, argv, 0, &remaining, NULL);
 116
 117   /* Determine file names.  */
 118   if (do_undo || output_name != NULL)
 119     {
 120       if (remaining + 1 != argc)
 121         {
 122         wrong_arguments:
 123           error (0, 0, gettext ("wrong number of arguments"));
 124           argp_help (&argp, stdout, ARGP_HELP_SEE,
 125                      program_invocation_short_name);
 126           exit (1);
 127         }
 128       input_name = argv[remaining];
 129     }
 130   else
 131     {
 132       if (remaining + 2 != argc)
 133         goto wrong_arguments;
 134
 135       input_name = argv[remaining++];
 136       output_name = argv[remaining];
 137     }
 138
 139   /* First load the shared object to initialize version dependend
 140      variables.  */
 141   if (load_db ())
 142     error (EXIT_FAILURE, 0, gettext ("No usable database library found."));
 143
 144   /* Special handling if we are asked to print the database.  */
 145   if (do_undo)
 146     {
 147       dbopen (input_name, db_rdonly, 0666, &db_file);
 148       if (db_file == NULL)
 149         error (EXIT_FAILURE, 0, gettext ("cannot open database file `%s': %s"),
 150                input_name,
 151                (errno == EINVAL ? gettext ("incorrectly formatted file")
 152                 : strerror (errno)));
 153
 154       status = print_database (db_file);
 155
 156       db_file->close (db_file->db, 0);
 157
 158       return status;
 159     }
 160
 161   /* Open input file.  */
 162   if (strcmp (input_name, "-") == 0 || strcmp (input_name, "/dev/stdin") == 0)
 163     input_file = stdin;
 164   else
 165     {
 166       struct stat st;
 167
 168       input_file = fopen (input_name, "r");
 169       if (input_file == NULL)
 170         error (EXIT_FAILURE, errno, gettext ("cannot open input file `%s'"),
 171                input_name);
 172
 173       /* Get the access rights from the source file.  The output file should
 174          have the same.  */
 175       if (fstat (fileno (input_file), &st) >= 0)
 176         mode = st.st_mode & ACCESSPERMS;
 177     }
 178
 179   /* Open output file.  This must not be standard output so we don't
 180      handle "-" and "/dev/stdout" special.  */
 181   dbopen (output_name, DB_CREATE | db_truncate, mode, &db_file);
 182   if (db_file == NULL)
 183     error (EXIT_FAILURE, errno, gettext ("cannot open output file `%s'"),
 184            output_name);
 185
 186   /* Start the real work.  */
 187   status = process_input (input_file, input_name, db_file, to_lowercase,
 188                           be_quiet);
 189
 190   /* Close files.  */
 191   if (input_file != stdin)
 192     fclose (input_file);
 193   db_file->close (db_file->db, 0);
 194
 195   return status;
 196 }
 197
 198
 199 /* Handle program arguments.  */
 200 static error_t
 201 parse_opt (int key, char *arg, struct argp_state *state)
 202 {
 203   switch (key)
 204     {
 205     case 'f':
 206       to_lowercase = 1;
 207       break;
 208     case 'o':
 209       output_name = arg;
 210       break;
 211     case 'q':
 212       be_quiet = 1;
 213       break;
 214     case 'u':
 215       do_undo = 1;
 216       break;
 217     default:
 218       return ARGP_ERR_UNKNOWN;
 219     }
 220   return 0;
 221 }
 222
 223
 224 static char *
 225 more_help (int key, const char *text, void *input)
 226 {
 227   switch (key)
 228     {
 229     case ARGP_KEY_HELP_EXTRA:
 230       /* We print some extra information.  */
 231       return strdup (gettext ("\
 232 Report bugs using the `glibcbug' script to <bugs@gnu.org>.\n"));
 233     default:
 234       break;
 235     }
 236   return (char *) text;
 237 }
 238
 239 /* Print the version information.  */
 240 static void
 241 print_version (FILE *stream, struct argp_state *state)
 242 {
 243   fprintf (stream, "makedb (GNU %s) %s\n", PACKAGE, VERSION);
 244   fprintf (stream, gettext ("\
 245 Copyright (C) %s Free Software Foundation, Inc.\n\
 246 This is free software; see the source for copying conditions.  There is NO\n\
 247 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 248 "), "2000");
 249   fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
 250 }
 251
 252
 253 static int
 254 process_input (input, inname, output, to_lowercase, be_quiet)
 255      FILE *input;
 256      const char *inname;
 257      NSS_DB *output;
 258      int to_lowercase;
 259      int be_quiet;
 260 {
 261   char *line;
 262   size_t linelen;
 263   int status;
 264   size_t linenr;
 265
 266   line = NULL;
 267   linelen = 0;
 268   status = EXIT_SUCCESS;
 269   linenr = 0;
 270
 271   while (!feof (input))
 272     {
 273       DBT key;
 274       DBT val;
 275       char *cp;
 276       int n;
 277
 278       n = getline (&line, &linelen, input);
 279       if (n < 0)
 280         /* This means end of file or some bug.  */
 281         break;
 282       if (n == 0)
 283         /* Short read.  Probably interrupted system call. */
 284         continue;
 285
 286       ++linenr;
 287
 288       if (line[n - 1] == '\n')
 289         /* Remove trailing newline.  */
 290         line[--n] = '\0';
 291
 292       cp = line;
 293       while (isspace (*cp))
 294         ++cp;
 295
 296       if (*cp == '#')
 297         /* First non-space character in line '#': it's a comment.  */
 298         continue;
 299
 300       key.data = cp;
 301       while (*cp != '\0' && !isspace (*cp))
 302         {
 303           if (to_lowercase)
 304             *cp = tolower (*cp);
 305           ++cp;
 306         }
 307
 308       if (key.data == cp)
 309         /* It's an empty line.  */
 310         continue;
 311
 312       key.size = cp - (char *) key.data;
 313       key.flags = 0;
 314
 315       while (isspace (*cp))
 316         ++cp;
 317
 318       val.data = cp;
 319       val.size = (&line[n] - cp) + 1;
 320       val.flags = 0;
 321
 322       /* Store the value.  */
 323       status = output->put (output->db, NULL, &key, &val, db_nooverwrite);
 324       if (status != 0)
 325         {
 326           if (status == db_keyexist)
 327             {
 328               if (!be_quiet)
 329                 error_at_line (0, 0, inname, linenr,
 330                                gettext ("duplicate key"));
 331               /* This is no real error.  Just give a warning.  */
 332               status = 0;
 333               continue;
 334             }
 335           else
 336             error (0, status, gettext ("while writing database file"));
 337
 338           status = EXIT_FAILURE;
 339
 340           clearerr (input);
 341           break;
 342         }
 343     }
 344
 345   if (ferror (input))
 346     {
 347       error (0, 0, gettext ("problems while reading `%s'"), inname);
 348       status = EXIT_FAILURE;
 349     }
 350
 351   return status;
 352 }
 353
 354
 355 static int
 356 print_database (db)
 357      NSS_DB *db;
 358 {
 359   DBT key;
 360   DBT val;
 361   NSS_DBC *cursor;
 362   int status;
 363
 364   status = db->cursor (db->db, NULL, &cursor);
 365   if (status != 0)
 366     {
 367       error (0, status, gettext ("while reading database"));
 368       return EXIT_FAILURE;
 369     }
 370
 371   key.flags = 0;
 372   val.flags = 0;
 373   status = cursor->c_get (cursor->cursor, &key, &val, db_first);
 374   while (status == 0)
 375     {
 376       printf ("%.*s %s\n", (int) key.size, (char *) key.data,
 377               (char *) val.data);
 378
 379       status = cursor->c_get (cursor->cursor, &key, &val, db_next);
 380     }
 381
 382   if (status != db_notfound)
 383     {
 384       error (0, status, gettext ("while reading database"));
 385       return EXIT_FAILURE;
 386     }
 387
 388   return EXIT_SUCCESS;
 389 }