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668 lines
15 KiB
668 lines
15 KiB
/*-
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* Copyright (c) 2009-2012,2014 Michihiro NAKAJIMA
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* Copyright (c) 2003-2007 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "archive_platform.h"
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__FBSDID("$FreeBSD: head/lib/libarchive/archive_util.c 201098 2009-12-28 02:58:14Z kientzle $");
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#if defined(HAVE_WINCRYPT_H) && !defined(__CYGWIN__)
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#include <wincrypt.h>
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#endif
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#ifdef HAVE_ZLIB_H
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#include <cm_zlib.h>
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#endif
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#ifdef HAVE_LZMA_H
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#include <cm_lzma.h>
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#endif
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#ifdef HAVE_BZLIB_H
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#include <cm_bzlib.h>
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#endif
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#ifdef HAVE_LZ4_H
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#include <lz4.h>
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#endif
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#include "archive.h"
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#include "archive_private.h"
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#include "archive_random_private.h"
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#include "archive_string.h"
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#ifndef O_CLOEXEC
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#define O_CLOEXEC 0
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#endif
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static int archive_utility_string_sort_helper(char **, unsigned int);
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/* Generic initialization of 'struct archive' objects. */
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int
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__archive_clean(struct archive *a)
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{
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archive_string_conversion_free(a);
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return (ARCHIVE_OK);
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}
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int
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archive_version_number(void)
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{
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return (ARCHIVE_VERSION_NUMBER);
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}
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const char *
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archive_version_string(void)
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{
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return (ARCHIVE_VERSION_STRING);
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}
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const char *
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archive_version_details(void)
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{
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static struct archive_string str;
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static int init = 0;
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const char *zlib = archive_zlib_version();
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const char *liblzma = archive_liblzma_version();
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const char *bzlib = archive_bzlib_version();
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const char *liblz4 = archive_liblz4_version();
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if (!init) {
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archive_string_init(&str);
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archive_strcat(&str, ARCHIVE_VERSION_STRING);
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if (zlib != NULL) {
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archive_strcat(&str, " zlib/");
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archive_strcat(&str, zlib);
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}
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if (liblzma) {
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archive_strcat(&str, " liblzma/");
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archive_strcat(&str, liblzma);
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}
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if (bzlib) {
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const char *p = bzlib;
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const char *sep = strchr(p, ',');
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if (sep == NULL)
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sep = p + strlen(p);
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archive_strcat(&str, " bz2lib/");
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archive_strncat(&str, p, sep - p);
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}
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if (liblz4) {
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archive_strcat(&str, " liblz4/");
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archive_strcat(&str, liblz4);
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}
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}
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return str.s;
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}
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const char *
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archive_zlib_version(void)
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{
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#ifdef HAVE_ZLIB_H
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return ZLIB_VERSION;
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#else
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return NULL;
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#endif
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}
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const char *
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archive_liblzma_version(void)
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{
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#ifdef HAVE_LZMA_H
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return LZMA_VERSION_STRING;
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#else
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return NULL;
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#endif
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}
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const char *
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archive_bzlib_version(void)
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{
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#ifdef HAVE_BZLIB_H
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return BZ2_bzlibVersion();
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#else
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return NULL;
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#endif
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}
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const char *
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archive_liblz4_version(void)
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{
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#if defined(HAVE_LZ4_H) && defined(HAVE_LIBLZ4)
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#define str(s) #s
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#define NUMBER(x) str(x)
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return NUMBER(LZ4_VERSION_MAJOR) "." NUMBER(LZ4_VERSION_MINOR) "." NUMBER(LZ4_VERSION_RELEASE);
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#undef NUMBER
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#undef str
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#else
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return NULL;
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#endif
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}
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int
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archive_errno(struct archive *a)
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{
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return (a->archive_error_number);
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}
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const char *
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archive_error_string(struct archive *a)
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{
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if (a->error != NULL && *a->error != '\0')
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return (a->error);
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else
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return (NULL);
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}
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int
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archive_file_count(struct archive *a)
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{
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return (a->file_count);
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}
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int
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archive_format(struct archive *a)
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{
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return (a->archive_format);
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}
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const char *
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archive_format_name(struct archive *a)
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{
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return (a->archive_format_name);
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}
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int
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archive_compression(struct archive *a)
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{
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return archive_filter_code(a, 0);
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}
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const char *
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archive_compression_name(struct archive *a)
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{
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return archive_filter_name(a, 0);
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}
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/*
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* Return a count of the number of compressed bytes processed.
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*/
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int64_t
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archive_position_compressed(struct archive *a)
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{
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return archive_filter_bytes(a, -1);
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}
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/*
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* Return a count of the number of uncompressed bytes processed.
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*/
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int64_t
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archive_position_uncompressed(struct archive *a)
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{
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return archive_filter_bytes(a, 0);
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}
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void
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archive_clear_error(struct archive *a)
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{
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archive_string_empty(&a->error_string);
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a->error = NULL;
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a->archive_error_number = 0;
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}
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void
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archive_set_error(struct archive *a, int error_number, const char *fmt, ...)
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{
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va_list ap;
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a->archive_error_number = error_number;
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if (fmt == NULL) {
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a->error = NULL;
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return;
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}
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archive_string_empty(&(a->error_string));
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va_start(ap, fmt);
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archive_string_vsprintf(&(a->error_string), fmt, ap);
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va_end(ap);
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a->error = a->error_string.s;
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}
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void
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archive_copy_error(struct archive *dest, struct archive *src)
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{
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dest->archive_error_number = src->archive_error_number;
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archive_string_copy(&dest->error_string, &src->error_string);
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dest->error = dest->error_string.s;
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}
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void
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__archive_errx(int retvalue, const char *msg)
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{
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static const char *msg1 = "Fatal Internal Error in libarchive: ";
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size_t s;
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s = write(2, msg1, strlen(msg1));
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(void)s; /* UNUSED */
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s = write(2, msg, strlen(msg));
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(void)s; /* UNUSED */
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s = write(2, "\n", 1);
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(void)s; /* UNUSED */
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exit(retvalue);
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}
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/*
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* Create a temporary file
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*/
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#if defined(_WIN32) && !defined(__CYGWIN__)
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/*
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* Do not use Windows tmpfile() function.
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* It will make a temporary file under the root directory
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* and it'll cause permission error if a user who is
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* non-Administrator creates temporary files.
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* Also Windows version of mktemp family including _mktemp_s
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* are not secure.
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*/
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int
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__archive_mktemp(const char *tmpdir)
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{
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static const wchar_t *prefix = L"libarchive_";
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static const wchar_t *suffix = L"XXXXXXXXXX";
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static const wchar_t num[] = {
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L'0', L'1', L'2', L'3', L'4', L'5', L'6', L'7',
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L'8', L'9', L'A', L'B', L'C', L'D', L'E', L'F',
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L'G', L'H', L'I', L'J', L'K', L'L', L'M', L'N',
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L'O', L'P', L'Q', L'R', L'S', L'T', L'U', L'V',
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L'W', L'X', L'Y', L'Z', L'a', L'b', L'c', L'd',
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L'e', L'f', L'g', L'h', L'i', L'j', L'k', L'l',
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L'm', L'n', L'o', L'p', L'q', L'r', L's', L't',
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L'u', L'v', L'w', L'x', L'y', L'z'
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};
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HCRYPTPROV hProv;
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struct archive_wstring temp_name;
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wchar_t *ws;
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DWORD attr;
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wchar_t *xp, *ep;
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int fd;
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hProv = (HCRYPTPROV)NULL;
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fd = -1;
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ws = NULL;
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archive_string_init(&temp_name);
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/* Get a temporary directory. */
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if (tmpdir == NULL) {
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size_t l;
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wchar_t *tmp;
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l = GetTempPathW(0, NULL);
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if (l == 0) {
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la_dosmaperr(GetLastError());
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goto exit_tmpfile;
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}
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tmp = malloc(l*sizeof(wchar_t));
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if (tmp == NULL) {
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errno = ENOMEM;
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goto exit_tmpfile;
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}
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GetTempPathW((DWORD)l, tmp);
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archive_wstrcpy(&temp_name, tmp);
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free(tmp);
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} else {
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if (archive_wstring_append_from_mbs(&temp_name, tmpdir,
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strlen(tmpdir)) < 0)
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goto exit_tmpfile;
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if (temp_name.s[temp_name.length-1] != L'/')
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archive_wstrappend_wchar(&temp_name, L'/');
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}
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/* Check if temp_name is a directory. */
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attr = GetFileAttributesW(temp_name.s);
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if (attr == (DWORD)-1) {
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if (GetLastError() != ERROR_FILE_NOT_FOUND) {
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la_dosmaperr(GetLastError());
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goto exit_tmpfile;
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}
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ws = __la_win_permissive_name_w(temp_name.s);
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if (ws == NULL) {
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errno = EINVAL;
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goto exit_tmpfile;
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}
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attr = GetFileAttributesW(ws);
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if (attr == (DWORD)-1) {
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la_dosmaperr(GetLastError());
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goto exit_tmpfile;
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}
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}
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if (!(attr & FILE_ATTRIBUTE_DIRECTORY)) {
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errno = ENOTDIR;
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goto exit_tmpfile;
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}
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/*
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* Create a temporary file.
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*/
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archive_wstrcat(&temp_name, prefix);
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archive_wstrcat(&temp_name, suffix);
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ep = temp_name.s + archive_strlen(&temp_name);
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xp = ep - wcslen(suffix);
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if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL,
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CRYPT_VERIFYCONTEXT)) {
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la_dosmaperr(GetLastError());
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goto exit_tmpfile;
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}
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for (;;) {
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wchar_t *p;
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HANDLE h;
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/* Generate a random file name through CryptGenRandom(). */
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p = xp;
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if (!CryptGenRandom(hProv, (DWORD)(ep - p)*sizeof(wchar_t),
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(BYTE*)p)) {
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la_dosmaperr(GetLastError());
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goto exit_tmpfile;
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}
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for (; p < ep; p++)
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*p = num[((DWORD)*p) % (sizeof(num)/sizeof(num[0]))];
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free(ws);
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ws = __la_win_permissive_name_w(temp_name.s);
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if (ws == NULL) {
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errno = EINVAL;
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goto exit_tmpfile;
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}
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/* Specifies FILE_FLAG_DELETE_ON_CLOSE flag is to
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* delete this temporary file immediately when this
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* file closed. */
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h = CreateFileW(ws,
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GENERIC_READ | GENERIC_WRITE | DELETE,
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0,/* Not share */
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NULL,
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CREATE_NEW,/* Create a new file only */
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FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE,
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NULL);
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if (h == INVALID_HANDLE_VALUE) {
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/* The same file already exists. retry with
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* a new filename. */
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if (GetLastError() == ERROR_FILE_EXISTS)
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continue;
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/* Otherwise, fail creation temporary file. */
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la_dosmaperr(GetLastError());
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goto exit_tmpfile;
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}
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fd = _open_osfhandle((intptr_t)h, _O_BINARY | _O_RDWR);
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if (fd == -1) {
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CloseHandle(h);
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goto exit_tmpfile;
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} else
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break;/* success! */
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}
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exit_tmpfile:
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if (hProv != (HCRYPTPROV)NULL)
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CryptReleaseContext(hProv, 0);
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free(ws);
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archive_wstring_free(&temp_name);
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return (fd);
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}
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#else
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static int
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get_tempdir(struct archive_string *temppath)
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{
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const char *tmp;
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tmp = getenv("TMPDIR");
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if (tmp == NULL)
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#ifdef _PATH_TMP
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tmp = _PATH_TMP;
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#else
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tmp = "/tmp";
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#endif
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archive_strcpy(temppath, tmp);
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if (temppath->s[temppath->length-1] != '/')
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archive_strappend_char(temppath, '/');
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return (ARCHIVE_OK);
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}
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#if defined(HAVE_MKSTEMP)
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/*
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* We can use mkstemp().
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*/
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int
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__archive_mktemp(const char *tmpdir)
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{
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struct archive_string temp_name;
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int fd = -1;
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archive_string_init(&temp_name);
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if (tmpdir == NULL) {
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if (get_tempdir(&temp_name) != ARCHIVE_OK)
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goto exit_tmpfile;
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} else {
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archive_strcpy(&temp_name, tmpdir);
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if (temp_name.s[temp_name.length-1] != '/')
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archive_strappend_char(&temp_name, '/');
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}
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archive_strcat(&temp_name, "libarchive_XXXXXX");
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fd = mkstemp(temp_name.s);
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if (fd < 0)
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goto exit_tmpfile;
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__archive_ensure_cloexec_flag(fd);
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unlink(temp_name.s);
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exit_tmpfile:
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archive_string_free(&temp_name);
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return (fd);
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}
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#else
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/*
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* We use a private routine.
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*/
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int
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__archive_mktemp(const char *tmpdir)
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{
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static const char num[] = {
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
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'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
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'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
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'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
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'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
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'u', 'v', 'w', 'x', 'y', 'z'
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};
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struct archive_string temp_name;
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struct stat st;
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int fd;
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char *tp, *ep;
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fd = -1;
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archive_string_init(&temp_name);
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if (tmpdir == NULL) {
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if (get_tempdir(&temp_name) != ARCHIVE_OK)
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goto exit_tmpfile;
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} else
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archive_strcpy(&temp_name, tmpdir);
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if (temp_name.s[temp_name.length-1] == '/') {
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temp_name.s[temp_name.length-1] = '\0';
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temp_name.length --;
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}
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if (stat(temp_name.s, &st) < 0)
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goto exit_tmpfile;
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if (!S_ISDIR(st.st_mode)) {
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errno = ENOTDIR;
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goto exit_tmpfile;
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}
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archive_strcat(&temp_name, "/libarchive_");
|
|
tp = temp_name.s + archive_strlen(&temp_name);
|
|
archive_strcat(&temp_name, "XXXXXXXXXX");
|
|
ep = temp_name.s + archive_strlen(&temp_name);
|
|
|
|
do {
|
|
char *p;
|
|
|
|
p = tp;
|
|
archive_random(p, ep - p);
|
|
while (p < ep) {
|
|
int d = *((unsigned char *)p) % sizeof(num);
|
|
*p++ = num[d];
|
|
}
|
|
fd = open(temp_name.s, O_CREAT | O_EXCL | O_RDWR | O_CLOEXEC,
|
|
0600);
|
|
} while (fd < 0 && errno == EEXIST);
|
|
if (fd < 0)
|
|
goto exit_tmpfile;
|
|
__archive_ensure_cloexec_flag(fd);
|
|
unlink(temp_name.s);
|
|
exit_tmpfile:
|
|
archive_string_free(&temp_name);
|
|
return (fd);
|
|
}
|
|
|
|
#endif /* HAVE_MKSTEMP */
|
|
#endif /* !_WIN32 || __CYGWIN__ */
|
|
|
|
/*
|
|
* Set FD_CLOEXEC flag to a file descriptor if it is not set.
|
|
* We have to set the flag if the platform does not provide O_CLOEXEC
|
|
* or F_DUPFD_CLOEXEC flags.
|
|
*
|
|
* Note: This function is absolutely called after creating a new file
|
|
* descriptor even if the platform seemingly provides O_CLOEXEC or
|
|
* F_DUPFD_CLOEXEC macros because it is possible that the platform
|
|
* merely declares those macros, especially Linux 2.6.18 - 2.6.24 do it.
|
|
*/
|
|
void
|
|
__archive_ensure_cloexec_flag(int fd)
|
|
{
|
|
#if defined(_WIN32) && !defined(__CYGWIN__)
|
|
(void)fd; /* UNUSED */
|
|
#else
|
|
int flags;
|
|
|
|
if (fd >= 0) {
|
|
flags = fcntl(fd, F_GETFD);
|
|
if (flags != -1 && (flags & FD_CLOEXEC) == 0)
|
|
fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Utility function to sort a group of strings using quicksort.
|
|
*/
|
|
static int
|
|
archive_utility_string_sort_helper(char **strings, unsigned int n)
|
|
{
|
|
unsigned int i, lesser_count, greater_count;
|
|
char **lesser, **greater, **tmp, *pivot;
|
|
int retval1, retval2;
|
|
|
|
/* A list of 0 or 1 elements is already sorted */
|
|
if (n <= 1)
|
|
return (ARCHIVE_OK);
|
|
|
|
lesser_count = greater_count = 0;
|
|
lesser = greater = NULL;
|
|
pivot = strings[0];
|
|
for (i = 1; i < n; i++)
|
|
{
|
|
if (strcmp(strings[i], pivot) < 0)
|
|
{
|
|
lesser_count++;
|
|
tmp = (char **)realloc(lesser,
|
|
lesser_count * sizeof(char *));
|
|
if (!tmp) {
|
|
free(greater);
|
|
free(lesser);
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
lesser = tmp;
|
|
lesser[lesser_count - 1] = strings[i];
|
|
}
|
|
else
|
|
{
|
|
greater_count++;
|
|
tmp = (char **)realloc(greater,
|
|
greater_count * sizeof(char *));
|
|
if (!tmp) {
|
|
free(greater);
|
|
free(lesser);
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
greater = tmp;
|
|
greater[greater_count - 1] = strings[i];
|
|
}
|
|
}
|
|
|
|
/* quicksort(lesser) */
|
|
retval1 = archive_utility_string_sort_helper(lesser, lesser_count);
|
|
for (i = 0; i < lesser_count; i++)
|
|
strings[i] = lesser[i];
|
|
free(lesser);
|
|
|
|
/* pivot */
|
|
strings[lesser_count] = pivot;
|
|
|
|
/* quicksort(greater) */
|
|
retval2 = archive_utility_string_sort_helper(greater, greater_count);
|
|
for (i = 0; i < greater_count; i++)
|
|
strings[lesser_count + 1 + i] = greater[i];
|
|
free(greater);
|
|
|
|
return (retval1 < retval2) ? retval1 : retval2;
|
|
}
|
|
|
|
int
|
|
archive_utility_string_sort(char **strings)
|
|
{
|
|
unsigned int size = 0;
|
|
while (strings[size] != NULL)
|
|
size++;
|
|
return archive_utility_string_sort_helper(strings, size);
|
|
}
|