b33ae5ba7d
Systems like FreeBSD's Capsicum and Nuxi CloudABI apply the concept of capability-based security on the way processes can interact with the filesystem API. It is no longer possible to interact with the VFS through calls like open(), unlink(), rename(), etc. Instead, processes are only allowed to interact with files and directories to which they have been granted access. The *at() functions can be used for this purpose. This change adds a new config switch called _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE. If set, all functionality that requires the global filesystem namespace will be disabled. More concretely: - fstream's open() function will be removed. - cstdio will no longer pull in fopen(), rename(), etc. - The test suite's get_temp_file_name() will be removed. This will cause all tests that use the global filesystem namespace to break, but will at least make all the other tests run (as get_temp_file_name will not build anyway). It is important to mention that this change will make fstream rather useless on those systems for now. Still, I'd rather not have fstream disabled entirely, as it is of course possible to come up with an extension for fstream that would allow access to local filesystem namespaces (e.g., by adding an openat() member function). Differential revision: http://reviews.llvm.org/D8194 Reviewed by: jroelofs (thanks!) git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@232049 91177308-0d34-0410-b5e6-96231b3b80d8
99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// Define a bunch of macros that can be used in the tests instead of
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// implementation defined assumptions:
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// - locale names
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// - floating point number string output
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#ifndef PLATFORM_SUPPORT_H
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#define PLATFORM_SUPPORT_H
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#include <__config>
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// locale names
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#ifdef _WIN32
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// WARNING: Windows does not support UTF-8 codepages.
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// Locales are "converted" using http://docs.moodle.org/dev/Table_of_locales
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#define LOCALE_en_US_UTF_8 "English_United States.1252"
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#define LOCALE_cs_CZ_ISO8859_2 "Czech_Czech Republic.1250"
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#define LOCALE_fr_FR_UTF_8 "French_France.1252"
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#define LOCALE_fr_CA_ISO8859_1 "French_Canada.1252"
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#define LOCALE_ru_RU_UTF_8 "Russian_Russia.1251"
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#define LOCALE_zh_CN_UTF_8 "Chinese_China.936"
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#elif defined(__CloudABI__)
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// Timezones are integrated into locales through LC_TIMEZONE_MASK on
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// CloudABI. LC_ALL_MASK can only be used if a timezone has also been
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// provided. UTC should be all right.
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#define LOCALE_en_US_UTF_8 "en_US.UTF-8@UTC"
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#define LOCALE_fr_FR_UTF_8 "fr_FR.UTF-8@UTC"
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#define LOCALE_fr_CA_ISO8859_1 "fr_CA.ISO-8859-1@UTC"
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#define LOCALE_cs_CZ_ISO8859_2 "cs_CZ.ISO-8859-2@UTC"
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#define LOCALE_ru_RU_UTF_8 "ru_RU.UTF-8@UTC"
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#define LOCALE_zh_CN_UTF_8 "zh_CN.UTF-8@UTC"
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#else
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#define LOCALE_en_US_UTF_8 "en_US.UTF-8"
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#define LOCALE_fr_FR_UTF_8 "fr_FR.UTF-8"
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#ifdef __linux__
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#define LOCALE_fr_CA_ISO8859_1 "fr_CA.ISO-8859-1"
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#define LOCALE_cs_CZ_ISO8859_2 "cs_CZ.ISO-8859-2"
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#else
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#define LOCALE_fr_CA_ISO8859_1 "fr_CA.ISO8859-1"
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#define LOCALE_cs_CZ_ISO8859_2 "cs_CZ.ISO8859-2"
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#endif
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#define LOCALE_ru_RU_UTF_8 "ru_RU.UTF-8"
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#define LOCALE_zh_CN_UTF_8 "zh_CN.UTF-8"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string>
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#if defined(_LIBCPP_MSVCRT) || defined(__MINGW32__)
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#include <io.h> // _mktemp
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#else
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#include <unistd.h> // close
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#endif
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#if defined(_NEWLIB_VERSION) && defined(__STRICT_ANSI__)
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// Newlib provies this, but in the header it's under __STRICT_ANSI__
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extern "C" {
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int mkstemp(char*);
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}
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#endif
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#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
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inline
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std::string
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get_temp_file_name()
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{
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#if defined(_LIBCPP_MSVCRT) || defined(__MINGW32__)
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char Path[MAX_PATH+1];
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char FN[MAX_PATH+1];
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do { } while (0 == GetTempPath(MAX_PATH+1, Path));
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do { } while (0 == GetTempFileName(Path, "libcxx", 0, FN));
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return FN;
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#else
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std::string Name;
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int FD = -1;
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do {
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Name = "libcxx.XXXXXX";
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FD = mkstemp(&Name[0]);
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if (FD == -1 && errno == EINVAL) {
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perror("mkstemp");
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abort();
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}
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} while (FD == -1);
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close(FD);
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return Name;
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#endif
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}
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#endif // _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
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#endif // PLATFORM_SUPPORT_H
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