mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-14 10:09:48 +00:00
edd6bc7670
This version of mtree implements a new flag (-O) that can be used to restrict the tool to certain pathnames. Also, it fixes a compiler warning generated by -Wmissing-variable-declarations. Acked by: brooks
153 lines
3.7 KiB
C
153 lines
3.7 KiB
C
/* $NetBSD: only.c,v 1.2 2013/02/05 00:59:03 christos Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2013 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Christos Zoulas.
|
|
*
|
|
* 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.
|
|
* 3. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``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 FOUNDATION OR CONTRIBUTORS
|
|
* 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.
|
|
*/
|
|
#if HAVE_NBTOOL_CONFIG_H
|
|
#include "nbtool_config.h"
|
|
#endif
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#if defined(__RCSID) && !defined(lint)
|
|
__RCSID("$NetBSD: only.c,v 1.2 2013/02/05 00:59:03 christos Exp $");
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdbool.h>
|
|
#include <time.h>
|
|
#include <err.h>
|
|
#include <util.h>
|
|
|
|
#include "extern.h"
|
|
|
|
struct hentry {
|
|
char *str;
|
|
uint32_t hash;
|
|
struct hentry *next;
|
|
};
|
|
|
|
static struct hentry *table[1024];
|
|
static bool loaded;
|
|
|
|
static uint32_t
|
|
hash_str(const char *str)
|
|
{
|
|
const uint8_t *s = (const uint8_t *)str;
|
|
uint8_t c;
|
|
uint32_t hash = 0;
|
|
while ((c = *s++) != '\0')
|
|
hash = hash * 33 + c; /* "perl": k=33, r=r+r/32 */
|
|
return hash + (hash >> 5);
|
|
}
|
|
|
|
static bool
|
|
hash_find(const char *str, uint32_t *h)
|
|
{
|
|
struct hentry *e;
|
|
*h = hash_str(str) % __arraycount(table);
|
|
|
|
for (e = table[*h]; e; e = e->next)
|
|
if (e->hash == *h && strcmp(e->str, str) == 0)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static void
|
|
hash_insert(char *str, uint32_t h)
|
|
{
|
|
struct hentry *e;
|
|
|
|
if ((e = malloc(sizeof(*e))) == NULL)
|
|
mtree_err("memory allocation error");
|
|
|
|
e->str = str;
|
|
e->hash = h;
|
|
e->next = table[h];
|
|
table[h] = e;
|
|
}
|
|
|
|
static void
|
|
fill(char *str)
|
|
{
|
|
uint32_t h;
|
|
char *ptr = strrchr(str, '/');
|
|
|
|
if (ptr == NULL)
|
|
return;
|
|
|
|
*ptr = '\0';
|
|
if (!hash_find(str, &h)) {
|
|
char *x = strdup(str);
|
|
if (x == NULL)
|
|
mtree_err("memory allocation error");
|
|
hash_insert(x, h);
|
|
fill(str);
|
|
}
|
|
*ptr = '/';
|
|
}
|
|
|
|
void
|
|
load_only(const char *fname)
|
|
{
|
|
FILE *fp;
|
|
char *line;
|
|
size_t len, lineno;
|
|
|
|
if ((fp = fopen(fname, "r")) == NULL)
|
|
err(1, "Cannot open `%s'", fname);
|
|
|
|
while ((line = fparseln(fp, &len, &lineno, NULL, FPARSELN_UNESCALL))) {
|
|
uint32_t h;
|
|
if (hash_find(line, &h))
|
|
err(1, "Duplicate entry %s", line);
|
|
hash_insert(line, h);
|
|
fill(line);
|
|
}
|
|
|
|
fclose(fp);
|
|
loaded = true;
|
|
}
|
|
|
|
bool
|
|
find_only(const char *path)
|
|
{
|
|
uint32_t h;
|
|
|
|
if (!loaded)
|
|
return true;
|
|
return hash_find(path, &h);
|
|
}
|