mirror of
https://github.com/SELinuxProject/setools
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102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/**
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* @file
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*
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* Implementation of utility functions.
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*
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* @author Jeremy A. Mowery jmowery@tresys.com
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* @author Jason Tang jtang@tresys.com
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*
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* Copyright (C) 2006-2008 Tresys Technology, LLC
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <config.h>
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#include "qpol_internal.h"
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#include <qpol/util.h>
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#include <glob.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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const char *libqpol_get_version(void)
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{
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return LIBQPOL_VERSION_STRING;
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}
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#include <stdlib.h>
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#include <bzlib.h>
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#include <string.h>
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#define BZ2_MAGICSTR "BZh"
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#define BZ2_MAGICLEN (sizeof(BZ2_MAGICSTR)-1)
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/* qpol_bunzip() uncompresses a file to '*data', returning the total number of
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* uncompressed bytes in the file.
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* Returns -1 if file could not be decompressed.
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* Originally from libsemanage/src/direct_api.c, with slight mods */
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ssize_t qpol_bunzip(FILE *f, char **data)
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{
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BZFILE* b;
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size_t nBuf;
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char buf[1<<18];
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size_t size = sizeof(buf);
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int bzerror;
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size_t total=0;
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int small=0; // Set to 1 to use less memory decompressing (about 2x slower)
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bzerror = fread(buf, 1, BZ2_MAGICLEN, f);
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rewind(f);
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if ((bzerror != BZ2_MAGICLEN) || memcmp(buf, BZ2_MAGICSTR, BZ2_MAGICLEN))
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return -1;
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b = BZ2_bzReadOpen ( &bzerror, f, 0, small, NULL, 0 );
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if ( bzerror != BZ_OK ) {
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BZ2_bzReadClose ( &bzerror, b );
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return -1;
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}
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char *uncompress = realloc(NULL, size);
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while ( bzerror == BZ_OK) {
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nBuf = BZ2_bzRead ( &bzerror, b, buf, sizeof(buf));
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if (( bzerror == BZ_OK ) || ( bzerror == BZ_STREAM_END )) {
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if (total + nBuf > size) {
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size *= 2;
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uncompress = realloc(uncompress, size);
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}
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memcpy(&uncompress[total], buf, nBuf);
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total += nBuf;
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}
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}
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if ( bzerror != BZ_STREAM_END ) {
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BZ2_bzReadClose ( &bzerror, b );
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free(uncompress);
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return -1;
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}
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BZ2_bzReadClose ( &bzerror, b );
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*data = uncompress;
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return total;
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}
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