/*	$NetBSD: makedbm.c,v 1.25 2011/08/30 21:10:28 joerg Exp $	*/

/*
 * Copyright (c) 1994 Mats O Jansson <moj@stacken.kth.se>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: makedbm.c,v 1.25 2011/08/30 21:10:28 joerg Exp $");
#endif

#include <sys/param.h>
#include <sys/stat.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include <rpc/rpc.h>
#include <rpc/xdr.h>

#include "protos.h"
#include "ypdb.h"
#include "ypdef.h"

__dead static void	usage(void);
static int	add_record(DBM *, const char *, const char *, int);
static char	*file_date(char *);
static void	list_database(char *);
static void	create_database(char *, char *, char *, char *, char *,
			        char *, int, int, int);

int
main(int argc, char *argv[])
{
	int aflag, uflag, bflag, lflag, sflag;
	char *yp_input_file, *yp_output_file;
	char *yp_master_name, *yp_domain_name;
	char *infile, *outfile;
	int ch;

	yp_input_file = yp_output_file = NULL;
	yp_master_name = yp_domain_name = NULL;
	aflag = uflag = bflag = lflag = sflag = 0;
	infile = outfile = NULL;

	while ((ch = getopt(argc, argv, "blsui:o:m:d:")) != -1) {
		switch (ch) {
		case 'b':
			bflag = aflag = 1;
			break;

		case 'l':
			lflag = aflag = 1;
			break;

		case 's':
			sflag = aflag = 1;
			break;

		case 'i':
			yp_input_file = optarg;
			aflag = 1;
			break;

		case 'o':
			yp_output_file = optarg;
			aflag = 1;
			break;

		case 'm':
			yp_master_name = optarg;
			aflag = 1;
			break;

		case 'd':
			yp_domain_name = optarg;
			aflag = 1;
			break;

		case 'u':
			uflag = 1;
			break;

		default:
			usage();
		}
	}
	argc -= optind; argv += optind;

	if ((uflag != 0) && (aflag != 0))
		usage();
	else {
		if (uflag != 0) {
			if (argc == 1)
				infile = argv[0];
			else
				usage();
		} else {
			if (argc == 2) {
				infile = argv[0];
				outfile = argv[1];
			} else
				usage();
		}
	}

	if (uflag != 0)
		list_database(infile);
	else
		create_database(infile, outfile,
		    yp_input_file, yp_output_file, yp_master_name,
		    yp_domain_name, bflag, lflag, sflag);

	exit(0);
}

static int
add_record(DBM *db, const char *str1, const char *str2, int check)
{
	datum key, val;
	int status;

	key.dptr = __UNCONST(str1);
	key.dsize = strlen(str1);

	if (check) {
		val = ypdb_fetch(db, key);

		if (val.dptr != NULL)
			return 0;	/* already there */
	}
	val.dptr = __UNCONST(str2);
	val.dsize = strlen(str2);
	status = ypdb_store(db, key, val, YPDB_INSERT);

	if (status != 0) {
		warnx("can't store `%s %s'", str1, str2);
		return -1;
	}
	return 0;
}

static char *
file_date(char *filename)
{
	struct stat finfo;
	static char datestr[11];

	memset(datestr, 0, sizeof(datestr));

	if (strcmp(filename, "-") == 0)
		snprintf(datestr, sizeof(datestr), "%010d",
		    (int)time(NULL));
	else {
		if (stat(filename, &finfo) != 0)
			err(1, "can't stat %s", filename);
		snprintf(datestr, sizeof(datestr), "%010d",
		    (int)finfo.st_mtime);
	}

	return datestr;
}

static void
list_database(char *database)
{
	DBM *db;
	datum key, val;

	db = ypdb_open(database);
	if (db == NULL)
		err(1, "can't open database `%s'", database);

	key = ypdb_firstkey(db);

	while (key.dptr != NULL) {
		val = ypdb_fetch(db, key);
				/* workround trailing \0 in aliases.db */
		if (key.dptr[key.dsize - 1] == '\0')
			key.dsize--;
		printf("%*.*s", key.dsize, key.dsize, key.dptr);
		if (val.dsize > 0) {
			if (val.dptr[val.dsize - 1] == '\0')
				val.dsize--;
			printf(" %*.*s", val.dsize, val.dsize, val.dptr);
		}
		printf("\n");
		key = ypdb_nextkey(db);
	}

	ypdb_close(db);
}

static void
create_database(char *infile, char *database, char *yp_input_file,
		char *yp_output_file, char *yp_master_name,
		char *yp_domain_name, int bflag, int lflag, int sflag)
{
	FILE *data_file;
	char myname[MAXHOSTNAMELEN];
	size_t line_no = 0;
	size_t len;
	char *p, *k, *v, *slash;
	DBM *new_db;
	static const char template[] = "ypdbXXXXXX";
	char db_mapname[MAXPATHLEN + 1], db_outfile[MAXPATHLEN + 1];
	char empty_str[] = "";

	memset(db_mapname, 0, sizeof(db_mapname));
	memset(db_outfile, 0, sizeof(db_outfile));

	if (strcmp(infile, "-") == 0)
		data_file = stdin;
	else {
		data_file = fopen(infile, "r");
		if (data_file == NULL)
			err(1, "can't open `%s'", infile);
	}

	if (strlen(database) + strlen(YPDB_SUFFIX) > (sizeof(db_outfile) - 1))
		errx(1, "file name `%s' too long", database);

	snprintf(db_outfile, sizeof(db_outfile), "%s%s", database, YPDB_SUFFIX);

	slash = strrchr(database, '/');
	if (slash != NULL)
		slash[1] = '\0';	/* truncate to dir */
	else
		*database = '\0';	/* eliminate */

	/* NOTE: database is now directory where map goes ! */

	if (strlen(database) + strlen(template) + strlen(YPDB_SUFFIX) >
	    (sizeof(db_mapname) - 1))
		errx(1, "directory name `%s' too long", database);

	snprintf(db_mapname, sizeof(db_mapname), "%s%s",
	    database, template);

	new_db = ypdb_mktemp(db_mapname);
	if (new_db == NULL)
		err(1, "can't create temp database `%s'", db_mapname);

	for (;
	    (p = fparseln(data_file, &len, &line_no, NULL, FPARSELN_UNESCALL));
	    free(p)) {
		k = p;				/* set start of key */
		while (*k && isspace((unsigned char)*k)) /* skip leading whitespace */
			k++;

		if (! *k)
			continue;

		v = k;
		while (*v && !isspace((unsigned char)*v)) {	/* find leading whitespace */
				/* convert key to lower case if forcing. */
			if (lflag && isupper((unsigned char)*v))
				*v = tolower((unsigned char)*v);
			v++;
		}
		while (*v && isspace((unsigned char)*v))	/* replace space with <NUL> */
			*v++ = '\0';

		if (add_record(new_db, k, v, TRUE)) {    /* save record */
bad_record:
			ypdb_close(new_db);
			unlink(db_mapname);
			errx(1, "error adding record for line %lu",
			    (unsigned long)line_no);
		}
	}

	if (strcmp(infile, "-") != 0)
		(void) fclose(data_file);

	if (add_record(new_db, YP_LAST_KEY, file_date(infile), FALSE))
		goto bad_record;

	if (yp_input_file) {
		if (add_record(new_db, YP_INPUT_KEY, yp_input_file, FALSE))
			goto bad_record;
	}

	if (yp_output_file) {
		if (add_record(new_db, YP_OUTPUT_KEY, yp_output_file, FALSE))
			goto bad_record;
	}

	if (yp_master_name) {
		if (add_record(new_db, YP_MASTER_KEY, yp_master_name, FALSE))
			goto bad_record;
	} else {
		localhostname(myname, sizeof(myname) - 1);
		if (add_record(new_db, YP_MASTER_KEY, myname, FALSE))
			goto bad_record;
	}

	if (yp_domain_name) {
		if (add_record(new_db, YP_DOMAIN_KEY, yp_domain_name, FALSE))
			goto bad_record;
	}

	if (bflag) {
		if (add_record(new_db, YP_INTERDOMAIN_KEY, empty_str, FALSE))
			goto bad_record;
	}

	if (sflag) {
		if (add_record(new_db, YP_SECURE_KEY, empty_str, FALSE))
			goto bad_record;
	}

	ypdb_close(new_db);
	if (rename(db_mapname, db_outfile) < 0) {
		unlink(db_mapname);
		err(1, "rename `%s' -> `%s'", db_mapname, db_outfile);
	}
}

static void
usage(void)
{

	fprintf(stderr, "usage: %s -u file\n", getprogname());
	fprintf(stderr, "       %s [-lbs] %s\n", getprogname(),
	    "[-i YP_INPUT_FILE] [-o YP_OUTPUT_FILE]");
	fprintf(stderr, "          %s infile outfile\n",
	    "[-d YP_DOMAIN_NAME] [-m YP_MASTER_NAME]");
	exit(1);
}