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LibC: Implement getgrgid_r() and getgrnam_r()

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We currently don't have those 2 functions so let's add them
This commit is contained in:
hanaa12G 2023-12-24 16:26:11 +07:00 • committed by Andrew Kaster
parent 3dfd8defa9
commit 3c52c25515
4 changed files with 125 additions and 0 deletions
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102
Tests/LibC/TestLibCGrp.cpp Normal file
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/*
* Copyright (c) 2018-2023, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteString.h>
#include <AK/HashTable.h>
#include <LibTest/Macros.h>
#include <LibTest/TestCase.h>
#include <grp.h>
void check_correctness(struct group* gr);
void check_correctness(struct group* gr)
{
EXPECT_NE(gr, nullptr);
EXPECT_EQ(gr->gr_gid, (gid_t)3);
EXPECT_EQ(gr->gr_name, "phys"sv);
EXPECT_EQ(gr->gr_passwd, "x"sv);
HashTable<ByteString> members;
for (char** mem = gr->gr_mem; *mem; ++mem) {
members.set(ByteString(*mem));
}
EXPECT_EQ(true, members.contains("window"sv));
EXPECT_EQ(true, members.contains("anon"sv));
}
TEST_CASE(getgrid_returns_correct_value)
{
// From Base/etc/group
// phys:x:3:window,anon
struct group* gr = getgrgid(3);
check_correctness(gr);
gr = getgrgid(99999);
EXPECT_EQ(gr, nullptr);
}
TEST_CASE(getgrid_r_uses_provided_buffer)
{
// From Base/etc/group
// phys:x:3:window,anon
struct group g;
struct group* res;
AK::Array<char, 1024> buffer;
setgrent();
int rc = getgrgid_r(3, &g, buffer.data(), buffer.size(), &res);
endgrent();
EXPECT_EQ(rc, 0);
check_correctness(&g);
EXPECT_EQ(res, &g);
auto is_pointer_in_range = [&buffer](void* ptr) {
return (buffer.data() <= ptr) && (ptr < buffer.data() + buffer.size());
};
EXPECT(is_pointer_in_range(g.gr_mem));
EXPECT(is_pointer_in_range(g.gr_name));
char** mem = g.gr_mem;
for (; *mem; ++mem) {
EXPECT(is_pointer_in_range(mem));
EXPECT(is_pointer_in_range(*mem));
}
EXPECT(is_pointer_in_range(mem));
}
TEST_CASE(getgrname_r_uses_provided_buffer)
{
// From Base/etc/group
// phys:x:3:window,anon
struct group g;
struct group* res;
AK::Array<char, 1024> buffer;
setgrent();
int rc = getgrnam_r("phys", &g, buffer.data(), buffer.size(), &res);
endgrent();
EXPECT_EQ(rc, 0);
check_correctness(&g);
EXPECT_EQ(res, &g);
auto is_pointer_in_range = [&buffer](void* ptr) {
return (buffer.data() <= ptr) && (ptr < buffer.data() + buffer.size());
};
EXPECT(is_pointer_in_range(g.gr_mem));
EXPECT(is_pointer_in_range(g.gr_name));
char** mem = g.gr_mem;
for (; *mem; ++mem) {
EXPECT(is_pointer_in_range(mem));
EXPECT(is_pointer_in_range(*mem));
}
EXPECT(is_pointer_in_range(mem));
}