summaryrefslogtreecommitdiff
path: root/db/makedb.c
blob: b1ed9822758fd4e743cb751b351bfd838321384b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
/* makedb -- create simple DB database from textual input.
Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#include <db.h>
#include <ctype.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <getopt.h>
#include <libintl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* Get libc version number.  */
#include "../version.h"


/* Long options.  */
static const struct option long_options[] =
{
  { "help", no_argument, NULL, 'h' },
  { "fold-case", no_argument, NULL, 'f' },
  { "output", required_argument, NULL, 'o' },
  { "undo", no_argument, NULL, 'u' },
  { "version", no_argument, NULL, 'V' },
  { NULL, }
};

/* Prototypes for local functions.  */
static void usage __P ((int status)) __attribute__ ((noreturn));
static int process_input __P ((FILE *input, const char *inname, DB *output,
			       int to_lowercase));
static int print_database __P ((DB *db));


int
main (argc, argv)
     int argc;
     char *argv[];
{
  const char *output_name;
  const char *input_name;
  FILE *input_file;
  DB *db_file;
  int do_help;
  int do_version;
  int to_lowercase;
  int do_undo;
  int status;
  int opt;

  /* Set locale via LC_ALL.  */
  setlocale (LC_ALL, "");

  /* Set the text message domain.  */
  textdomain (_libc_intl_domainname);

  /* Initialize local variables.  */
  do_help = 0;
  do_version = 0;
  to_lowercase = 0;
  do_undo = 0;
  output_name = NULL;

  while ((opt = getopt_long (argc, argv, "fho:uV", long_options, NULL)) != EOF)
    switch (opt)
      {
      case '\0':        /* Long option.  */
        break;
      case 'h':
        do_help = 1;
        break;
      case 'f':
	to_lowercase = 1;
	break;
      case 'o':
        output_name = optarg;
        break;
      case 'u':
	do_undo = 1;
	break;
      case 'V':
        do_version = 1;
        break;
      default:
        usage (EXIT_FAILURE);
      }

  /* Version information is requested.  */
  if (do_version)
    printf ("%s - GNU %s %s\n", program_invocation_name, "libc", VERSION);

  /* Help is requested.  */
  if (do_help)
    usage (EXIT_SUCCESS);
  else if (do_version)
    exit (EXIT_SUCCESS);

  /* Determine file names.  */
  if (do_undo || output_name != NULL)
    {
      if (optind + 1 != argc)
	{
	wrong_arguments:
	  error (0, 0, gettext ("wrong number of arguments"));
	  usage (EXIT_FAILURE);
	}
      input_name = argv[optind];
    }
  else
    {
      if (optind + 2 != argc)
	goto wrong_arguments;

      input_name = argv[optind++];
      output_name = argv[optind];
    }

  /* Special handling if we are asked to print the database.  */
  if (do_undo)
    {
      db_file = dbopen (input_name, O_RDONLY, 0666, DB_BTREE, NULL);
      if (db_file == NULL)
	error (EXIT_FAILURE, 0, gettext ("cannot open database file `%s': %s"),
	       input_name,
	       errno == EFTYPE ? gettext ("incorrectly formatted file")
			       : strerror (errno));

      status = print_database (db_file);

      db_file->close (db_file);

      return status;
    }

  /* Open input file.  */
  if (strcmp (input_name, "-") == 0 || strcmp (input_name, "/dev/stdin") == 0)
    input_file = stdin;
  else
    {
      input_file = fopen (input_name, "r");
      if (input_file == NULL)
	error (EXIT_FAILURE, errno, gettext ("cannot open input file `%s'"),
	       input_name);
    }

  /* Open output file.  This must not be standard output so we don't
     handle "-" and "/dev/stdout" special.  */
  db_file = dbopen (output_name, O_CREAT | O_RDWR | O_TRUNC, 0666,
		    DB_BTREE, NULL);
  if (db_file == NULL)
    error (EXIT_FAILURE, errno, gettext ("cannot open output file `%s'"));

  /* Start the real work.  */
  status = process_input (input_file, input_name, db_file, to_lowercase);

  /* Close files.  */
  if (input_file != stdin)
    fclose (input_file);
  db_file->close (db_file);

  return status;
}


static void
usage (status)
     int status;
{
  if (status != EXIT_SUCCESS)
    fprintf (stderr, gettext ("Try `%s --help' for more information.\n"),
             program_invocation_name);
  else
    printf (gettext ("\
Usage: %s [OPTION]... INPUT-FILE OUTPUT-FILE\n\
       %s [OPTION]... -o OUTPUT-FILE INPUT-FILE\n\
       %s [OPTION]... -u INPUT-FILE\n\
Mandatory arguments to long options are mandatory for short options too.\n\
  -f, --fold-case     convert key to lower case\n\
  -h, --help          display this help and exit\n\
  -o, --output=NAME   write output to file NAME\n\
  -u, --undo          print content of database file, one entry a line\n\
  -V, --version       output version information and exit\n\
If INPUT-FILE is -, input is read from standard input.\n"),
	    program_invocation_name, program_invocation_name,
	    program_invocation_name);

  exit (status);
}


static int
process_input (input, inname, output, to_lowercase)
     FILE *input;
     const char *inname;
     DB *output;
     int to_lowercase;
{
  char *line;
  size_t linelen;
  int status;
  size_t linenr;

  line = NULL;
  linelen = 0;
  status = EXIT_SUCCESS;
  linenr = 0;

  while (!feof (input))
    {
      DBT key;
      DBT val;
      char *cp;
      int n;

      n = getline (&line, &linelen, input);
      if (n < 0)
	/* This means end of file or some bug.  */
	break;
      if (n == 0)
	/* Short read.  Probably interrupted system call. */
	continue;

      ++linenr;

      if (line[n - 1] == '\n')
	/* Remove trailing newline.  */
	line[--n] = '\0';

      cp = line;
      while (isspace (*cp))
	++cp;

      if (*cp == '#')
	/* First non-space character in line '#': it's a comment.  */
	continue;

      key.data = cp;
      while (*cp != '\0' && !isspace (*cp))
	{
	  if (to_lowercase)
	    *cp = tolower (*cp);
	  ++cp;
	}

      if (key.data == cp)
	/* It's an empty line.  */
	continue;

      key.size = cp - (char *) key.data;

      while (isspace (*cp))
	++cp;

      val.data = cp;
      val.size = &line[n] - cp;

      /* Store the value.  */
      status = output->put (output, &key, &val, R_NOOVERWRITE);
      if (status != 0)
	{
	  if (status == 1)
	    error_at_line (0, 0, inname, linenr, gettext ("duplicate key"));
	  else
	    error (0, errno, gettext ("while writing data base file"));

	  status = EXIT_FAILURE;
	  clearerr (input);
	  break;
	}
    }

  if (ferror (input))
    {
      error (0, 0, gettext ("problems while reading `%s'"));
      status = EXIT_FAILURE;
    }

  return status;
}


static int
print_database (db)
     DB *db;
{
  DBT key;
  DBT val;
  int no_more;

  no_more = db->seq (db, &key, &val, R_FIRST);
  while (!no_more)
    {
      printf ("%.*s %.*s\n", (int) key.size, (char *) key.data, (int) val.size,
	      (char *) val.data);

      no_more = db->seq (db, &key, &val, R_NEXT);
    }

  if (no_more == -1)
    {
      error (0, errno, gettext ("while reading database"));
      return EXIT_FAILURE;
    }

  return EXIT_SUCCESS;
}