hash.c

/*
 *  Author: Paul Sheer
 *  Modifications: Krzysztof Taraszka
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License, version 2.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
 *  02110-1301, USA.
 */

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <time.h>
#include "hash.h"
#include "dir.h"

char *
hex_hash (unsigned char *s) {
    static char h[4];
    unsigned long r = 0;
    for (; *s; s++)
	r += *s;
    snprintf (h, sizeof (h), "%2.2X", (unsigned int) (r & 0xFFUL));
    return h; }

#ifdef STANDALONE

#include <sys/stat.h>

int
main (int argc, char **argv) {
    if (argc > 1) {
	char buf[1024];
	int l;
	unsigned char *s;
	s = (unsigned char *) hex_hash ((unsigned char *) argv[1]);
	snprintf (buf, sizeof (buf), SHEERDNS_DIR "/%s/%s", s, argv[1]);
	mkdir (buf, 0700);
	l = strlen ((char *) s);
	write (1, s, l);
	write (1, "\n", 1); }
    return 0; }
#endif