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CMake/libarchive/archive_util.c

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/*-
* Copyright (c) 2009-2012,2014 Michihiro NAKAJIMA
* Copyright (c) 2003-2007 Tim Kientzle
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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.
*/
#include "archive_platform.h"
__FBSDID("$FreeBSD: head/lib/libarchive/archive_util.c 201098 2009-12-28 02:58:14Z kientzle $");
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#if defined(HAVE_WINCRYPT_H) && !defined(__CYGWIN__)
#include <wincrypt.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
#ifdef HAVE_LZMA_H
#include <lzma.h>
#endif
#ifdef HAVE_BZLIB_H
#include <bzlib.h>
#endif
#ifdef HAVE_LZ4_H
#include <lz4.h>
#endif
#include "archive.h"
#include "archive_private.h"
#include "archive_random_private.h"
#include "archive_string.h"
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
static int archive_utility_string_sort_helper(char **, unsigned int);
/* Generic initialization of 'struct archive' objects. */
int
__archive_clean(struct archive *a)
{
archive_string_conversion_free(a);
return (ARCHIVE_OK);
}
int
archive_version_number(void)
{
return (ARCHIVE_VERSION_NUMBER);
}
const char *
archive_version_string(void)
{
return (ARCHIVE_VERSION_STRING);
}
const char *
archive_version_details(void)
{
static struct archive_string str;
static int init = 0;
if (!init) {
archive_string_init(&str);
archive_strcat(&str, ARCHIVE_VERSION_STRING);
#ifdef HAVE_ZLIB_H
archive_strcat(&str, " zlib/");
archive_strcat(&str, ZLIB_VERSION);
#endif
#ifdef HAVE_LZMA_H
archive_strcat(&str, " liblzma/");
archive_strcat(&str, LZMA_VERSION_STRING);
#endif
#ifdef HAVE_BZLIB_H
{
const char *p = BZ2_bzlibVersion();
const char *sep = strchr(p, ',');
if (sep == NULL)
sep = p + strlen(p);
archive_strcat(&str, " bz2lib/");
archive_strncat(&str, p, sep - p);
}
#endif
#if defined(HAVE_LZ4_H) && defined(HAVE_LIBLZ4)
archive_string_sprintf(&str, " liblz4/%d.%d.%d",
LZ4_VERSION_MAJOR, LZ4_VERSION_MINOR, LZ4_VERSION_RELEASE);
#endif
}
return str.s;
}
int
archive_errno(struct archive *a)
{
return (a->archive_error_number);
}
const char *
archive_error_string(struct archive *a)
{
if (a->error != NULL && *a->error != '\0')
return (a->error);
else
return (NULL);
}
int
archive_file_count(struct archive *a)
{
return (a->file_count);
}
int
archive_format(struct archive *a)
{
return (a->archive_format);
}
const char *
archive_format_name(struct archive *a)
{
return (a->archive_format_name);
}
int
archive_compression(struct archive *a)
{
return archive_filter_code(a, 0);
}
const char *
archive_compression_name(struct archive *a)
{
return archive_filter_name(a, 0);
}
/*
* Return a count of the number of compressed bytes processed.
*/
int64_t
archive_position_compressed(struct archive *a)
{
return archive_filter_bytes(a, -1);
}
/*
* Return a count of the number of uncompressed bytes processed.
*/
int64_t
archive_position_uncompressed(struct archive *a)
{
return archive_filter_bytes(a, 0);
}
void
archive_clear_error(struct archive *a)
{
archive_string_empty(&a->error_string);
a->error = NULL;
a->archive_error_number = 0;
}
void
archive_set_error(struct archive *a, int error_number, const char *fmt, ...)
{
va_list ap;
a->archive_error_number = error_number;
if (fmt == NULL) {
a->error = NULL;
return;
}
archive_string_empty(&(a->error_string));
va_start(ap, fmt);
archive_string_vsprintf(&(a->error_string), fmt, ap);
va_end(ap);
a->error = a->error_string.s;
}
void
archive_copy_error(struct archive *dest, struct archive *src)
{
dest->archive_error_number = src->archive_error_number;
archive_string_copy(&dest->error_string, &src->error_string);
dest->error = dest->error_string.s;
}
void
__archive_errx(int retvalue, const char *msg)
{
static const char *msg1 = "Fatal Internal Error in libarchive: ";
size_t s;
s = write(2, msg1, strlen(msg1));
(void)s; /* UNUSED */
s = write(2, msg, strlen(msg));
(void)s; /* UNUSED */
s = write(2, "\n", 1);
(void)s; /* UNUSED */
exit(retvalue);
}
/*
* Create a temporary file
*/
#if defined(_WIN32) && !defined(__CYGWIN__)
/*
* Do not use Windows tmpfile() function.
* It will make a temporary file under the root directory
* and it'll cause permission error if a user who is
* non-Administrator creates temporary files.
* Also Windows version of mktemp family including _mktemp_s
* are not secure.
*/
int
__archive_mktemp(const char *tmpdir)
{
static const wchar_t *prefix = L"libarchive_";
static const wchar_t *suffix = L"XXXXXXXXXX";
static const wchar_t num[] = {
L'0', L'1', L'2', L'3', L'4', L'5', L'6', L'7',
L'8', L'9', L'A', L'B', L'C', L'D', L'E', L'F',
L'G', L'H', L'I', L'J', L'K', L'L', L'M', L'N',
L'O', L'P', L'Q', L'R', L'S', L'T', L'U', L'V',
L'W', L'X', L'Y', L'Z', L'a', L'b', L'c', L'd',
L'e', L'f', L'g', L'h', L'i', L'j', L'k', L'l',
L'm', L'n', L'o', L'p', L'q', L'r', L's', L't',
L'u', L'v', L'w', L'x', L'y', L'z'
};
HCRYPTPROV hProv;
struct archive_wstring temp_name;
wchar_t *ws;
DWORD attr;
wchar_t *xp, *ep;
int fd;
hProv = (HCRYPTPROV)NULL;
fd = -1;
ws = NULL;
archive_string_init(&temp_name);
/* Get a temporary directory. */
if (tmpdir == NULL) {
size_t l;
wchar_t *tmp;
l = GetTempPathW(0, NULL);
if (l == 0) {
la_dosmaperr(GetLastError());
goto exit_tmpfile;
}
tmp = malloc(l*sizeof(wchar_t));
if (tmp == NULL) {
errno = ENOMEM;
goto exit_tmpfile;
}
GetTempPathW((DWORD)l, tmp);
archive_wstrcpy(&temp_name, tmp);
free(tmp);
} else {
if (archive_wstring_append_from_mbs(&temp_name, tmpdir,
strlen(tmpdir)) < 0)
goto exit_tmpfile;
if (temp_name.s[temp_name.length-1] != L'/')
archive_wstrappend_wchar(&temp_name, L'/');
}
/* Check if temp_name is a directory. */
attr = GetFileAttributesW(temp_name.s);
if (attr == (DWORD)-1) {
if (GetLastError() != ERROR_FILE_NOT_FOUND) {
la_dosmaperr(GetLastError());
goto exit_tmpfile;
}
ws = __la_win_permissive_name_w(temp_name.s);
if (ws == NULL) {
errno = EINVAL;
goto exit_tmpfile;
}
attr = GetFileAttributesW(ws);
if (attr == (DWORD)-1) {
la_dosmaperr(GetLastError());
goto exit_tmpfile;
}
}
if (!(attr & FILE_ATTRIBUTE_DIRECTORY)) {
errno = ENOTDIR;
goto exit_tmpfile;
}
/*
* Create a temporary file.
*/
archive_wstrcat(&temp_name, prefix);
archive_wstrcat(&temp_name, suffix);
ep = temp_name.s + archive_strlen(&temp_name);
xp = ep - wcslen(suffix);
if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT)) {
la_dosmaperr(GetLastError());
goto exit_tmpfile;
}
for (;;) {
wchar_t *p;
HANDLE h;
/* Generate a random file name through CryptGenRandom(). */
p = xp;
if (!CryptGenRandom(hProv, (DWORD)(ep - p)*sizeof(wchar_t),
(BYTE*)p)) {
la_dosmaperr(GetLastError());
goto exit_tmpfile;
}
for (; p < ep; p++)
*p = num[((DWORD)*p) % (sizeof(num)/sizeof(num[0]))];
free(ws);
ws = __la_win_permissive_name_w(temp_name.s);
if (ws == NULL) {
errno = EINVAL;
goto exit_tmpfile;
}
/* Specifies FILE_FLAG_DELETE_ON_CLOSE flag is to
* delete this temporary file immediately when this
* file closed. */
h = CreateFileW(ws,
GENERIC_READ | GENERIC_WRITE | DELETE,
0,/* Not share */
NULL,
CREATE_NEW,/* Create a new file only */
FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE,
NULL);
if (h == INVALID_HANDLE_VALUE) {
/* The same file already exists. retry with
* a new filename. */
if (GetLastError() == ERROR_FILE_EXISTS)
continue;
/* Otherwise, fail creation temporary file. */
la_dosmaperr(GetLastError());
goto exit_tmpfile;
}
fd = _open_osfhandle((intptr_t)h, _O_BINARY | _O_RDWR);
if (fd == -1) {
CloseHandle(h);
goto exit_tmpfile;
} else
break;/* success! */
}
exit_tmpfile:
if (hProv != (HCRYPTPROV)NULL)
CryptReleaseContext(hProv, 0);
free(ws);
archive_wstring_free(&temp_name);
return (fd);
}
#else
static int
get_tempdir(struct archive_string *temppath)
{
const char *tmp;
tmp = getenv("TMPDIR");
if (tmp == NULL)
#ifdef _PATH_TMP
tmp = _PATH_TMP;
#else
tmp = "/tmp";
#endif
archive_strcpy(temppath, tmp);
if (temppath->s[temppath->length-1] != '/')
archive_strappend_char(temppath, '/');
return (ARCHIVE_OK);
}
#if defined(HAVE_MKSTEMP)
/*
* We can use mkstemp().
*/
int
__archive_mktemp(const char *tmpdir)
{
struct archive_string temp_name;
int fd = -1;
archive_string_init(&temp_name);
if (tmpdir == NULL) {
if (get_tempdir(&temp_name) != ARCHIVE_OK)
goto exit_tmpfile;
} else {
archive_strcpy(&temp_name, tmpdir);
if (temp_name.s[temp_name.length-1] != '/')
archive_strappend_char(&temp_name, '/');
}
archive_strcat(&temp_name, "libarchive_XXXXXX");
fd = mkstemp(temp_name.s);
if (fd < 0)
goto exit_tmpfile;
__archive_ensure_cloexec_flag(fd);
unlink(temp_name.s);
exit_tmpfile:
archive_string_free(&temp_name);
return (fd);
}
#else
/*
* We use a private routine.
*/
int
__archive_mktemp(const char *tmpdir)
{
static const char num[] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
'u', 'v', 'w', 'x', 'y', 'z'
};
struct archive_string temp_name;
struct stat st;
int fd;
char *tp, *ep;
fd = -1;
archive_string_init(&temp_name);
if (tmpdir == NULL) {
if (get_tempdir(&temp_name) != ARCHIVE_OK)
goto exit_tmpfile;
} else
archive_strcpy(&temp_name, tmpdir);
if (temp_name.s[temp_name.length-1] == '/') {
temp_name.s[temp_name.length-1] = '\0';
temp_name.length --;
}
if (stat(temp_name.s, &st) < 0)
goto exit_tmpfile;
if (!S_ISDIR(st.st_mode)) {
errno = ENOTDIR;
goto exit_tmpfile;
}
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; /* UNSED */
#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);
}
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