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Implement filesystem::perm_options specified in NB comments.

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The NB comments for filesystem changed permissions and added
a new enum `perm_options` which control how the permissions
are applied.

This implements than NB resolution

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@328476 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2018-03-26 06:23:55 +00:00
parent f1471a367b
commit f2c93738b8
6 changed files with 119 additions and 60 deletions
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64
include/experimental/filesystem
View File

@@ -68,6 +68,7 @@
enum class file_type;
enum class perms;
enum class perm_options;
enum class copy_options;
enum class directory_options;
@@ -178,8 +179,11 @@
void last_write_time(const path& p, file_time_type new_time,
error_code& ec) _NOEXCEPT;
void permissions(const path& p, perms prms);
void permissions(const path& p, perms prms, error_code& ec) _NOEXCEPT;
void permissions(const path& p, perms prms,
perm_options opts=perm_options::replace);
void permissions(const path& p, perms prms, error_code& ec) noexcept;
void permissions(const path& p, perms prms, perm_options opts,
error_code& ec);
path read_symlink(const path& p);
path read_symlink(const path& p, error_code& ec);
@@ -290,10 +294,6 @@ enum class _LIBCPP_ENUM_VIS perms : unsigned
sticky_bit = 01000,
mask = 07777,
unknown = 0xFFFF,
add_perms = 0x10000,
remove_perms = 0x20000,
symlink_nofollow = 0x40000
};
_LIBCPP_INLINE_VISIBILITY
@@ -324,6 +324,41 @@ _LIBCPP_INLINE_VISIBILITY
inline perms& operator^=(perms& _LHS, perms _RHS)
{ return _LHS = _LHS ^ _RHS; }
enum class _LIBCPP_ENUM_VIS perm_options : unsigned char {
replace = 1,
add = 2,
remove = 4,
nofollow = 8
};
_LIBCPP_INLINE_VISIBILITY
inline _LIBCPP_CONSTEXPR perm_options operator&(perm_options _LHS, perm_options _RHS)
{ return static_cast<perm_options>(static_cast<unsigned>(_LHS) & static_cast<unsigned>(_RHS)); }
_LIBCPP_INLINE_VISIBILITY
inline _LIBCPP_CONSTEXPR perm_options operator|(perm_options _LHS, perm_options _RHS)
{ return static_cast<perm_options>(static_cast<unsigned>(_LHS) | static_cast<unsigned>(_RHS)); }
_LIBCPP_INLINE_VISIBILITY
inline _LIBCPP_CONSTEXPR perm_options operator^(perm_options _LHS, perm_options _RHS)
{ return static_cast<perm_options>(static_cast<unsigned>(_LHS) ^ static_cast<unsigned>(_RHS)); }
_LIBCPP_INLINE_VISIBILITY
inline _LIBCPP_CONSTEXPR perm_options operator~(perm_options _LHS)
{ return static_cast<perm_options>(~static_cast<unsigned>(_LHS)); }
_LIBCPP_INLINE_VISIBILITY
inline perm_options& operator&=(perm_options& _LHS, perm_options _RHS)
{ return _LHS = _LHS & _RHS; }
_LIBCPP_INLINE_VISIBILITY
inline perm_options& operator|=(perm_options& _LHS, perm_options _RHS)
{ return _LHS = _LHS | _RHS; }
_LIBCPP_INLINE_VISIBILITY
inline perm_options& operator^=(perm_options& _LHS, perm_options _RHS)
{ return _LHS = _LHS ^ _RHS; }
enum class _LIBCPP_ENUM_VIS copy_options : unsigned short
{
none = 0,
@@ -1286,7 +1321,7 @@ _LIBCPP_FUNC_VIS
void __last_write_time(const path& p, file_time_type new_time,
error_code *ec=nullptr);
_LIBCPP_FUNC_VIS
void __permissions(const path& p, perms prms, error_code *ec=nullptr);
void __permissions(const path&, perms, perm_options, error_code* = nullptr);
_LIBCPP_FUNC_VIS
path __read_symlink(const path& p, error_code *ec=nullptr);
_LIBCPP_FUNC_VIS
@@ -1664,13 +1699,20 @@ void last_write_time(const path& __p, file_time_type __t, error_code& __ec) _NOE
}
inline _LIBCPP_INLINE_VISIBILITY
void permissions(const path& __p, perms __prms) {
__permissions(__p, __prms);
void permissions(const path& __p, perms __prms,
perm_options __opts = perm_options::replace) {
__permissions(__p, __prms, __opts);
}
inline _LIBCPP_INLINE_VISIBILITY
void permissions(const path& __p, perms __prms, error_code& __ec) {
__permissions(__p, __prms, &__ec);
void permissions(const path& __p, perms __prms, error_code& __ec) _NOEXCEPT {
__permissions(__p, __prms, perm_options::replace, &__ec);
}
inline _LIBCPP_INLINE_VISIBILITY
void permissions(const path& __p, perms __prms, perm_options __opts,
error_code& __ec) {
__permissions(__p, __prms, __opts, &__ec);
}
inline _LIBCPP_INLINE_VISIBILITY

19
src/experimental/filesystem/operations.cpp
View File

@@ -178,7 +178,7 @@ bool copy_file_impl(const path& from, const path& to, perms from_perms,
ec, "copy_file", from, to);
return false;
}
__permissions(to, from_perms, ec);
__permissions(to, from_perms, perm_options::replace, ec);
// TODO what if permissions fails?
return true;
}
@@ -635,14 +635,17 @@ void __last_write_time(const path& p, file_time_type new_time,
}
void __permissions(const path& p, perms prms, std::error_code *ec)
void __permissions(const path& p, perms prms, perm_options opts,
std::error_code *ec)
{
const bool resolve_symlinks = !bool(perms::symlink_nofollow & prms);
const bool add_perms = bool(perms::add_perms & prms);
const bool remove_perms = bool(perms::remove_perms & prms);
_LIBCPP_ASSERT(!(add_perms && remove_perms),
"Both add_perms and remove_perms are set");
auto has_opt = [&](perm_options o) { return bool(o & opts); };
const bool resolve_symlinks = !has_opt(perm_options::nofollow);
const bool add_perms = has_opt(perm_options::add);
const bool remove_perms = has_opt(perm_options::remove);
_LIBCPP_ASSERT(
(add_perms + remove_perms + has_opt(perm_options::replace)) == 1,
"One and only one of the perm_options constants replace, add, or remove "
"is present in opts");
bool set_sym_perms = false;
prms &= perms::mask;

12
test/std/experimental/filesystem/class.rec.dir.itr/rec.dir.itr.members/increment.pass.cpp
View File

@@ -255,8 +255,8 @@ TEST_CASE(test_PR35078)
// Change the permissions so we can no longer iterate
permissions(permDeniedDir,
perms::remove_perms|perms::group_exec
|perms::owner_exec|perms::others_exec);
perms::group_exec|perms::owner_exec|perms::others_exec,
perm_options::remove);
const std::error_code eacess_ec =
std::make_error_code(std::errc::permission_denied);
@@ -329,8 +329,8 @@ TEST_CASE(test_PR35078_with_symlink)
// Change the permissions so we can no longer iterate
permissions(permDeniedDir,
perms::remove_perms|perms::group_exec
|perms::owner_exec|perms::others_exec);
perms::group_exec|perms::owner_exec|perms::others_exec,
perm_options::remove);
const std::error_code eacess_ec =
std::make_error_code(std::errc::permission_denied);
@@ -413,8 +413,8 @@ TEST_CASE(test_PR35078_with_symlink_file)
// Change the permissions so we can no longer iterate
permissions(permDeniedDir,
perms::remove_perms|perms::group_exec
|perms::owner_exec|perms::others_exec);
perms::group_exec|perms::owner_exec|perms::others_exec,
perm_options::remove);
const std::error_code eacess_ec =
std::make_error_code(std::errc::permission_denied);

5
test/std/experimental/filesystem/fs.enum/enum.perms.pass.cpp
View File

@@ -59,9 +59,6 @@ int main() {
E::set_gid == ME(02000) &&
E::sticky_bit == ME(01000) &&
E::mask == ME(07777) &&
E::unknown == ME(0xFFFF) &&
E::add_perms == ME(0x10000) &&
E::remove_perms == ME(0x20000) &&
E::symlink_nofollow == ME(0x40000),
E::unknown == ME(0xFFFF),
"Expected enumeration values do not match");
}

2
test/std/experimental/filesystem/fs.op.funcs/fs.op.create_directory/create_directory_with_attributes.pass.cpp
View File

@@ -60,7 +60,7 @@ TEST_CASE(create_directory_one_level)
{
scoped_test_env env;
// Remove setgid which mkdir would inherit
permissions(env.test_root, perms::remove_perms | perms::set_gid);
permissions(env.test_root, perms::set_gid, perm_options::remove);
const path dir = env.make_env_path("dir1");
const path attr_dir = env.create_dir("dir2");

69
test/std/experimental/filesystem/fs.op.funcs/fs.op.permissions/permissions.pass.cpp
View File

@@ -11,8 +11,11 @@
// <experimental/filesystem>
// void permissions(const path& p, perms prms);
// void permissions(const path& p, perms prms,
// perm_options opts = perm_options::replace);
// void permissions(const path& p, perms prms, std::error_code& ec) noexcept;
// void permissions(const path& p, perms prms, perm_options opts, std::error_code);
#include "filesystem_include.hpp"
@@ -30,17 +33,19 @@ TEST_SUITE(filesystem_permissions_test_suite)
TEST_CASE(test_signatures)
{
const path p; ((void)p);
const perms opts{}; ((void)opts);
const perms pr{}; ((void)pr);
const perm_options opts{}; ((void)opts);
std::error_code ec; ((void)ec);
ASSERT_NOT_NOEXCEPT(fs::permissions(p, opts));
// Not noexcept because of narrow contract
LIBCPP_ONLY(
ASSERT_NOT_NOEXCEPT(fs::permissions(p, opts, ec)));
ASSERT_NOT_NOEXCEPT(fs::permissions(p, pr));
ASSERT_NOT_NOEXCEPT(fs::permissions(p, pr, opts));
ASSERT_NOEXCEPT(fs::permissions(p, pr, ec));
ASSERT_NOT_NOEXCEPT(fs::permissions(p, pr, opts, ec));
}
TEST_CASE(test_error_reporting)
{
auto checkThrow = [](path const& f, fs::perms opts, const std::error_code& ec)
auto checkThrow = [](path const& f, fs::perms opts,
const std::error_code& ec)
{
#ifndef TEST_HAS_NO_EXCEPTIONS
try {
@@ -61,15 +66,17 @@ TEST_CASE(test_error_reporting)
const path dne = env.make_env_path("dne");
const path dne_sym = env.create_symlink(dne, "dne_sym");
{ // !exists
std::error_code ec;
std::error_code ec = GetTestEC();
fs::permissions(dne, fs::perms{}, ec);
TEST_REQUIRE(ec);
TEST_CHECK(ec != GetTestEC());
TEST_CHECK(checkThrow(dne, fs::perms{}, ec));
}
{
std::error_code ec;
std::error_code ec = GetTestEC();
fs::permissions(dne_sym, fs::perms{}, ec);
TEST_REQUIRE(ec);
TEST_CHECK(ec != GetTestEC());
TEST_CHECK(checkThrow(dne_sym, fs::perms{}, ec));
}
}
@@ -81,43 +88,52 @@ TEST_CASE(basic_permissions_test)
const path dir = env.create_dir("dir1");
const path file_for_sym = env.create_file("file2", 42);
const path sym = env.create_symlink(file_for_sym, "sym");
const perms AP = perms::add_perms;
const perms RP = perms::remove_perms;
const perms NF = perms::symlink_nofollow;
const perm_options AP = perm_options::add;
const perm_options RP = perm_options::remove;
const perm_options NF = perm_options::nofollow;
struct TestCase {
path p;
perms set_perms;
perms expected;
perm_options opts = perm_options::replace;
} cases[] = {
// test file
{file, perms::none, perms::none},
{file, perms::owner_all, perms::owner_all},
{file, perms::group_all | AP, perms::owner_all | perms::group_all},
{file, perms::group_all | RP, perms::owner_all},
{file, perms::group_all, perms::owner_all | perms::group_all, AP},
{file, perms::group_all, perms::owner_all, RP},
// test directory
{dir, perms::none, perms::none},
{dir, perms::owner_all, perms::owner_all},
{dir, perms::group_all | AP, perms::owner_all | perms::group_all},
{dir, perms::group_all | RP, perms::owner_all},
{dir, perms::group_all, perms::owner_all | perms::group_all, AP},
{dir, perms::group_all, perms::owner_all, RP},
// test symlink without symlink_nofollow
{sym, perms::none, perms::none},
{sym, perms::owner_all, perms::owner_all},
{sym, perms::group_all | AP, perms::owner_all | perms::group_all},
{sym, perms::group_all | RP , perms::owner_all},
{sym, perms::group_all, perms::owner_all | perms::group_all, AP},
{sym, perms::group_all, perms::owner_all, RP},
// test non-symlink with symlink_nofollow. The last test on file/dir
// will have set their permissions to perms::owner_all
{file, perms::group_all | AP | NF, perms::owner_all | perms::group_all},
{dir, perms::group_all | AP | NF, perms::owner_all | perms::group_all}
{file, perms::group_all, perms::owner_all | perms::group_all, AP | NF},
{dir, perms::group_all, perms::owner_all | perms::group_all, AP | NF}
};
for (auto const& TC : cases) {
TEST_CHECK(status(TC.p).permissions() != TC.expected);
// Set the error code to ensure it's cleared.
std::error_code ec = std::make_error_code(std::errc::bad_address);
{
std::error_code ec = GetTestEC();
permissions(TC.p, TC.set_perms, TC.opts, ec);
TEST_CHECK(!ec);
auto pp = status(TC.p).permissions();
TEST_CHECK(pp == TC.expected);
}
if (TC.opts == perm_options::replace) {
std::error_code ec = GetTestEC();
permissions(TC.p, TC.set_perms, ec);
TEST_CHECK(!ec);
auto pp = status(TC.p).permissions();
TEST_CHECK(pp == TC.expected);
}
}
}
TEST_CASE(test_no_resolve_symlink_on_symlink)
@@ -130,10 +146,11 @@ TEST_CASE(test_no_resolve_symlink_on_symlink)
struct TestCase {
perms set_perms;
perms expected; // only expected on platform that support symlink perms.
perm_options opts = perm_options::replace;
} cases[] = {
{perms::owner_all, perms::owner_all},
{perms::group_all | perms::add_perms, perms::owner_all | perms::group_all},
{perms::owner_all | perms::remove_perms, perms::group_all},
{perms::group_all, perms::owner_all | perms::group_all, perm_options::add},
{perms::owner_all, perms::group_all, perm_options::remove},
};
for (auto const& TC : cases) {
#if defined(__APPLE__) || defined(__FreeBSD__)
@@ -148,8 +165,8 @@ TEST_CASE(test_no_resolve_symlink_on_symlink)
const auto expected_link_perms = symlink_status(sym).permissions();
std::error_code expected_ec = std::make_error_code(std::errc::operation_not_supported);
#endif
std::error_code ec = std::make_error_code(std::errc::bad_address);
permissions(sym, TC.set_perms | perms::symlink_nofollow, ec);
std::error_code ec = GetTestEC();
permissions(sym, TC.set_perms, TC.opts | perm_options::nofollow, ec);
TEST_CHECK(ec == expected_ec);
TEST_CHECK(status(file).permissions() == file_perms);
TEST_CHECK(symlink_status(sym).permissions() == expected_link_perms);