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/**
* @file
*
* Implementation of utility functions.
*
* @author Jeremy A. Mowery jmowery@tresys.com
* @author Jason Tang jtang@tresys.com
*
* Copyright (C) 2006-2008 Tresys Technology, LLC
*
* This 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.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include "qpol_internal.h"
#include <qpol/util.h>
#include <glob.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <selinux/selinux.h>
const char *libqpol_get_version(void)
{
return LIBQPOL_VERSION_STRING;
}
static int search_policy_source_file(char **path)
{
int error;
char *source_path;
if (asprintf(&source_path, "%s/src/policy/policy.conf", selinux_policy_root()) < 0) {
return -1;
}
if (access(source_path, R_OK) < 0) {
error = errno;
free(source_path);
errno = error;
return 1;
}
*path = source_path;
return 0;
}
static int get_binpol_version(const char *policy_fname)
{
FILE *policy_fp = NULL;
int ret_version, error;
policy_fp = fopen(policy_fname, "r");
if (policy_fp == NULL) {
return -1;
}
if (!qpol_is_file_binpol(policy_fp)) {
error = errno;
fclose(policy_fp);
errno = error;
return -1;
}
ret_version = qpol_binpol_version(policy_fp);
fclose(policy_fp);
return ret_version;
}
static int search_policy_binary_file(char **path)
{
const char *binary_path = selinux_current_policy_path();
if (binary_path) {
*path = strdup(binary_path);
if (*path) return 0;
}
return -1;
}
int qpol_default_policy_find(char **path)
{
int rt;
if (path == NULL) {
errno = EINVAL;
return -1;
}
*path = NULL;
/* Try default source policy first as a source policy contains
* more useful information. */
if ((rt = search_policy_source_file(path)) <= 0) {
return rt;
}
/* Try a binary policy */
return search_policy_binary_file(path);
}
#include <stdlib.h>
#include <bzlib.h>
#include <string.h>
#include <sys/sendfile.h>
#define BZ2_MAGICSTR "BZh"
#define BZ2_MAGICLEN (sizeof(BZ2_MAGICSTR)-1)
/* qpol_bunzip() uncompresses a file to '*data', returning the total number of
* uncompressed bytes in the file.
* Returns -1 if file could not be decompressed.
* Originally from libsemanage/src/direct_api.c, with slight mods */
ssize_t qpol_bunzip(FILE *f, char **data)
{
BZFILE* b;
size_t nBuf;
char buf[1<<18];
size_t size = sizeof(buf);
int bzerror;
size_t total=0;
int small=0; // Set to 1 to use less memory decompressing (about 2x slower)
bzerror = fread(buf, 1, BZ2_MAGICLEN, f);
rewind(f);
if ((bzerror != BZ2_MAGICLEN) || memcmp(buf, BZ2_MAGICSTR, BZ2_MAGICLEN))
return -1;
b = BZ2_bzReadOpen ( &bzerror, f, 0, small, NULL, 0 );
if ( bzerror != BZ_OK ) {
BZ2_bzReadClose ( &bzerror, b );
return -1;
}
char *uncompress = realloc(NULL, size);
while ( bzerror == BZ_OK) {
nBuf = BZ2_bzRead ( &bzerror, b, buf, sizeof(buf));
if (( bzerror == BZ_OK ) || ( bzerror == BZ_STREAM_END )) {
if (total + nBuf > size) {
size *= 2;
uncompress = realloc(uncompress, size);
}
memcpy(&uncompress[total], buf, nBuf);
total += nBuf;
}
}
if ( bzerror != BZ_STREAM_END ) {
BZ2_bzReadClose ( &bzerror, b );
free(uncompress);
return -1;
}
BZ2_bzReadClose ( &bzerror, b );
*data = uncompress;
return total;
}
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