// Copyright (c) Microsoft. All rights reserved.

// Licensed under the MIT license. See LICENSE file in the project root for full license information.

#include "pal_config.h"

#include "pal_uid.h"

#include "pal_utilities.h"

#include <assert.h>

#include <errno.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/types.h>

#include <pwd.h>

extern "C" int32_t GetPwUidR(uint32_t uid, Passwd* pwd, char* buf, int32_t buflen)

{

assert(pwd != nullptr);

assert(buf != nullptr);

assert(buflen >= 0);

if (buflen < 0)

return EINVAL;

struct passwd nativePwd;

struct passwd* result;

int error = getpwuid_r(uid, &nativePwd, buf, UnsignedCast(buflen), &result);

// positive error number returned -> failure other than entry-not-found

if (error != 0)

{

assert(error > 0);

*pwd = {}; // managed out param must be initialized

return error;

}

// 0 returned with null result -> entry-not-found

if (result == nullptr)

{

*pwd = {}; // managed out param must be initialized

return -1; // shim convention for entry-not-found

}

// 0 returned with non-null result (guaranteed to be set to pwd arg) -> success

assert(result == &nativePwd);

pwd->Name = nativePwd.pw_name;

pwd->Password = nativePwd.pw_passwd;

pwd->UserId = nativePwd.pw_uid;

pwd->GroupId = nativePwd.pw_gid;

pwd->UserInfo = nativePwd.pw_gecos;

pwd->HomeDirectory = nativePwd.pw_dir;

pwd->Shell = nativePwd.pw_shell;

return 0;

}

extern "C" uint32_t GetEUid()

{

return geteuid();

}

extern "C" uint32_t GetEGid()

{

return getegid();

}