glibc/nss/makedb.c

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/* Create simple DB database from textual input.
Copyright (C) 1996, 1997, 1998, 1999, 2000 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <argp.h>
#include <ctype.h>
#include <dlfcn.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <libintl.h>
#include <locale.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "nss_db/dummy-db.h"
/* Get libc version number. */
#include "../version.h"
#define PACKAGE _libc_intl_domainname
/* If non-zero convert key to lower case. */
static int to_lowercase;
/* If non-zero print content of input file, one entry per line. */
static int do_undo;
/* If non-zero do not print informational messages. */
static int be_quiet;
/* Name of output file. */
static const char *output_name;
/* Name and version of program. */
static void print_version (FILE *stream, struct argp_state *state);
void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
/* Definitions of arguments for argp functions. */
static const struct argp_option options[] =
{
{ "fold-case", 'f', NULL, 0, N_("Convert key to lower case") },
{ "output", 'o', N_("NAME"), 0, N_("Write output to file NAME") },
{ "quiet", 'q', NULL, 0,
N_("Do not print messages while building database") },
{ "undo", 'u', NULL, 0,
N_("Print content of database file, one entry a line") },
{ NULL, 0, NULL, 0, NULL }
};
/* Short description of program. */
static const char doc[] = N_("Create simple DB database from textual input.");
/* Strings for arguments in help texts. */
static const char args_doc[] = N_("\
INPUT-FILE OUTPUT-FILE\n-o OUTPUT-FILE INPUT-FILE\n-u INPUT-FILE");
/* Prototype for option handler. */
static error_t parse_opt (int key, char *arg, struct argp_state *state);
/* Function to print some extra text in the help message. */
static char *more_help (int key, const char *text, void *input);
/* Data structure to communicate with argp functions. */
static struct argp argp =
{
options, parse_opt, args_doc, doc, NULL, more_help
};
/* Prototypes for local functions. */
static int process_input (FILE *input, const char *inname, NSS_DB *output,
int to_lowercase, int be_quiet);
static int print_database (NSS_DB *db);
int
main (int argc, char *argv[])
{
const char *input_name;
FILE *input_file;
NSS_DB *db_file;
int status;
int remaining;
int mode = 0666;
/* Set locale via LC_ALL. */
setlocale (LC_ALL, "");
/* Set the text message domain. */
textdomain (_libc_intl_domainname);
/* Initialize local variables. */
input_name = NULL;
/* Parse and process arguments. */
argp_parse (&argp, argc, argv, 0, &remaining, NULL);
/* Determine file names. */
if (do_undo || output_name != NULL)
{
if (remaining + 1 != argc)
{
wrong_arguments:
error (0, 0, gettext ("wrong number of arguments"));
argp_help (&argp, stdout, ARGP_HELP_SEE,
program_invocation_short_name);
exit (1);
}
input_name = argv[remaining];
}
else
{
if (remaining + 2 != argc)
goto wrong_arguments;
input_name = argv[remaining++];
output_name = argv[remaining];
}
/* First load the shared object to initialize version dependend
variables. */
if (load_db () != NSS_STATUS_SUCCESS)
error (EXIT_FAILURE, 0, gettext ("No usable database library found."));
/* Special handling if we are asked to print the database. */
if (do_undo)
{
dbopen (input_name, db_rdonly, 0666, &db_file);
if (db_file == NULL)
error (EXIT_FAILURE, 0, gettext ("cannot open database file `%s': %s"),
input_name,
(errno == EINVAL ? gettext ("incorrectly formatted file")
: strerror (errno)));
status = print_database (db_file);
db_file->close (db_file->db, 0);
return status;
}
/* Open input file. */
if (strcmp (input_name, "-") == 0 || strcmp (input_name, "/dev/stdin") == 0)
input_file = stdin;
else
{
struct stat st;
input_file = fopen (input_name, "r");
if (input_file == NULL)
error (EXIT_FAILURE, errno, gettext ("cannot open input file `%s'"),
input_name);
/* Get the access rights from the source file. The output file should
have the same. */
if (fstat (fileno (input_file), &st) >= 0)
mode = st.st_mode & ACCESSPERMS;
}
/* Open output file. This must not be standard output so we don't
handle "-" and "/dev/stdout" special. */
dbopen (output_name, DB_CREATE | db_truncate, mode, &db_file);
if (db_file == NULL)
error (EXIT_FAILURE, errno, gettext ("cannot open output file `%s'"),
output_name);
/* Start the real work. */
status = process_input (input_file, input_name, db_file, to_lowercase,
be_quiet);
/* Close files. */
if (input_file != stdin)
fclose (input_file);
db_file->close (db_file->db, 0);
return status;
}
/* Handle program arguments. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case 'f':
to_lowercase = 1;
break;
case 'o':
output_name = arg;
break;
case 'q':
be_quiet = 1;
break;
case 'u':
do_undo = 1;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static char *
more_help (int key, const char *text, void *input)
{
switch (key)
{
case ARGP_KEY_HELP_EXTRA:
/* We print some extra information. */
return strdup (gettext ("\
For bug reporting instructions, please see:\n\
<http://www.gnu.org/software/libc/bugs.html>.\n"));
default:
break;
}
return (char *) text;
}
/* Print the version information. */
static void
print_version (FILE *stream, struct argp_state *state)
{
fprintf (stream, "makedb (GNU %s) %s\n", PACKAGE, VERSION);
fprintf (stream, gettext ("\
Copyright (C) %s Free Software Foundation, Inc.\n\
This is free software; see the source for copying conditions. There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
"), "2000");
fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
}
static int
process_input (input, inname, output, to_lowercase, be_quiet)
FILE *input;
const char *inname;
NSS_DB *output;
int to_lowercase;
int be_quiet;
{
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;
key.flags = 0;
while (isspace (*cp))
++cp;
val.data = cp;
val.size = (&line[n] - cp) + 1;
val.flags = 0;
/* Store the value. */
status = output->put (output->db, NULL, &key, &val, db_nooverwrite);
if (status != 0)
{
if (status == db_keyexist)
{
if (!be_quiet)
error_at_line (0, 0, inname, linenr,
gettext ("duplicate key"));
/* This is no real error. Just give a warning. */
status = 0;
continue;
}
else
error (0, status, gettext ("while writing database file"));
status = EXIT_FAILURE;
clearerr (input);
break;
}
}
if (ferror (input))
{
error (0, 0, gettext ("problems while reading `%s'"), inname);
status = EXIT_FAILURE;
}
return status;
}
static int
print_database (db)
NSS_DB *db;
{
DBT key;
DBT val;
NSS_DBC *cursor;
int status;
status = db->cursor (db->db, NULL, &cursor);
if (status != 0)
{
error (0, status, gettext ("while reading database"));
return EXIT_FAILURE;
}
key.flags = 0;
val.flags = 0;
status = cursor->c_get (cursor->cursor, &key, &val, db_first);
while (status == 0)
{
printf ("%.*s %s\n", (int) key.size, (char *) key.data,
(char *) val.data);
status = cursor->c_get (cursor->cursor, &key, &val, db_next);
}
if (status != db_notfound)
{
error (0, status, gettext ("while reading database"));
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}