/*	$OpenBSD: makedbm.c,v 1.29 2009/10/27 23:59:57 deraadt Exp $ */

/*
 * Copyright (c) 1994-97 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 <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "ypdb.h"
#include "ypdef.h"
#include "db.h"

extern char *__progname;		/* from crt0.o */

/*
 * Read one line
 */

static int
read_line(FILE *fp, char *buf, int size)
{
	int	done = 0;

	do {
		while (fgets(buf, size, fp)) {
			int len = strlen(buf);

			done += len;
			if (len > 1 && buf[len-2] == '\\' &&
			    buf[len-1] == '\n') {
				int ch;

				buf += len - 2;
				size -= len - 2;
				*buf = '\n'; buf[1] = '\0';

				/* Skip leading white space on next line */
				while ((ch = getc(fp)) != EOF &&
				    isascii(ch) && isspace(ch))
					;
				(void) ungetc(ch, fp);
			} else {
				return done;
			}
		}
	} while (size > 0 && !feof(fp));
	return done;
}

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

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

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

		if (val.dptr != NULL)
			return;		/* already there */
	}

	val.dptr = str2;
	val.dsize = strlen(str2);
	status = ypdb_store(db, key, val, YPDB_INSERT);

	if (status != 0) {
		printf("%s: problem storing %s %s\n",
		    __progname, str1, str2);
		exit(1);
	}
}

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

	if (strcmp(filename,"-") == 0) {
		snprintf(datestr, sizeof datestr, "%010u", time(0));
	} else {
		status = stat(filename, &finfo);
		if (status < 0) {
			fprintf(stderr, "%s: can't stat %s\n", __progname, filename);
			exit(1);
		}
		snprintf(datestr, sizeof datestr, "%010u", finfo.st_mtime);
	}
	return datestr;
}

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

	db = ypdb_open(database, O_RDONLY, 0444);

	if (db == NULL) {
		if (Uflag != 0)
			if (db_hash_list_database(database))
				return;

		fprintf(stderr, "%s: can't open database %s: %s\n", __progname,
		    database, strerror(errno));
		exit(1);
	}

	key = ypdb_firstkey(db);

	while (key.dptr != NULL) {
		val = ypdb_fetch(db, key);
		printf("%*.*s %*.*s\n",
		    key.dsize, key.dsize, key.dptr,
		    val.dsize, val.dsize, val.dptr);
		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	data_line[4096]; /* XXX: DB bsize = 4096 in ypdb.c */
	char	myname[MAXHOSTNAMELEN];
	int	line_no = 0, len;
	char	*p, *k, *v, *slash;
	DBM	*new_db;
	static	char mapname[] = "ypdbXXXXXXXXXX";
	char	db_mapname[MAXPATHLEN], db_outfile[MAXPATHLEN];
	char	db_tempname[MAXPATHLEN], empty_str[] = "";

	if (strcmp(infile,"-") == 0) {
		data_file = stdin;
	} else {
		data_file = fopen(infile, "r");
		if (errno != 0) {
			(void)fprintf(stderr,"%s: ", __progname);
			perror(infile);
			exit(1);
		}
	}

	if (strlen(database) + strlen(YPDB_SUFFIX) > MAXPATHLEN) {
		fprintf(stderr,"%s: %s: file name too long\n",
		    __progname, database);
		exit(1);
	}
	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(mapname) +
	    strlen(YPDB_SUFFIX) > MAXPATHLEN) {
		fprintf(stderr,"%s: %s: directory name too long\n",
		    __progname, database);
		exit(1);
	}

	snprintf(db_mapname, sizeof(db_mapname), "%s%s%s",
	    database, mapname, YPDB_SUFFIX);
	mkstemps(db_mapname, sizeof(YPDB_SUFFIX));
	strlcpy(db_tempname, db_mapname, sizeof db_tempname);
	db_tempname[strlen(db_tempname) - sizeof(YPDB_SUFFIX) + 1] = '\0';

	new_db = ypdb_open(db_tempname, O_RDWR|O_CREAT, 0444);
	if (new_db == NULL) {
		fprintf(stderr, "%s: Unable to open output database %s\n",
		    __progname, db_outfile);
		exit(1);
	}

	while (read_line(data_file, data_line, sizeof(data_line))) {
		line_no++;
		len =  strlen(data_line);

		/* Check if we have the whole line */

		if (data_line[len-1] != '\n') {
			fprintf(stderr, "line %d in \"%s\" is too long",
			    line_no, infile);
		} else {
			data_line[len-1] = '\0';
		}

		p = (char *) &data_line;

		k = p;				    /* save start of key */
		while (!isspace(*p)) {		    /* find first "space" */
			if (lflag && isupper(*p))   /* if force lower case */
				*p = (char)tolower(*p);   /* fix it */
			p++;
		}
		while (isspace(*p)) {		/* replace space with <NUL> */
			*p = '\0';
			p++;
		}

		v = p;				/* save start of value */
		while (*p != '\0')		/* find end of string */
			p++;

		add_record(new_db, k, v, TRUE);	/* save record */

	}

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

	add_record(new_db, YP_LAST_KEY, file_date(infile), FALSE);

	if (yp_input_file)
		add_record(new_db, YP_INPUT_KEY, yp_input_file, FALSE);

	if (yp_output_file)
		add_record(new_db, YP_OUTPUT_KEY, yp_output_file, FALSE);

	if (yp_master_name)
		add_record(new_db, YP_MASTER_KEY, yp_master_name, FALSE);
	else {
		gethostname(myname, sizeof(myname));
		add_record(new_db, YP_MASTER_KEY, myname, FALSE);
	}

	if (yp_domain_name)
		add_record(new_db, YP_DOMAIN_KEY, yp_domain_name, FALSE);
	if (bflag)
		add_record(new_db, YP_INTERDOMAIN_KEY, empty_str, FALSE);
	if (sflag)
		add_record(new_db, YP_SECURE_KEY, empty_str, FALSE);

	ypdb_close(new_db);
	if (rename(db_mapname, db_outfile) < 0) {
		perror("rename");
		fprintf(stderr,"rename %s -> %s failed!\n", db_mapname,
		    db_outfile);
		exit(1);
	}

}

static void
usage(void)
{
	fprintf(stderr,"usage: makedbm [-blsUu] [-d yp_domain_name] "
	    "[-i yp_input_file]\n"
	    "\t[-m yp_master_name] [-o yp_output_file] infile outfile\n");
	exit(1);
}

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

	extern int optind;
	extern char *optarg;

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

	while ((ch = getopt(argc, argv, "Ublsui:o:m:d:")) != -1)
		switch (ch) {
		case 'U':
			uflag++;
			Uflag++;
			break;
		case 'b':
			bflag++;
			aflag++;
			break;
		case 'l':
			lflag++;
			aflag++;
			break;
		case 's':
			sflag++;
			aflag++;
			break;
		case 'i':
			yp_input_file = optarg;
			aflag++;
			break;
		case 'o':
			yp_output_file = optarg;
			aflag++;
			break;
		case 'm':
			yp_master_name = optarg;
			aflag++;
			break;
		case 'd':
			yp_domain_name = optarg;
			aflag++;
			break;
		case 'u':
			uflag++;
			break;
		default:
			usage();
			break;
		}

	if ((uflag != 0) && (aflag != 0))
		usage();

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

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

	return(0);
}