#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ getchar();
int getegid();
int geteuid();
int /*<<< orphan*/ getpid();
int getsid(int /*<<< orphan*/);
int getuid();
int /*<<< orphan*/ printf(char *, int);
int main(int argc, char **argv) {
  printf("uid: %d\n", getuid());
  printf("gid: %d\n", getegid());
  printf("sid: %d\n", getsid(getpid()));
  printf("euid: %d\n", geteuid());
  getchar();
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    $0x0,%al
call   1040 <getuid@plt>
mov    %eax,%esi
lea    0xe7d(%rip),%rdi
call   1050 <printf@plt>
mov    $0x0,%al
call   1090 <getegid@plt>
mov    %eax,%esi
lea    0xe55(%rip),%rdi
call   1050 <printf@plt>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,%edi
call   1060 <getsid@plt>
mov    %eax,%esi
lea    0xe42(%rip),%rdi
call   1050 <printf@plt>
mov    $0x0,%al
call   1070 <geteuid@plt>
mov    %eax,%esi
lea    0xe36(%rip),%rdi
call   1050 <printf@plt>
mov    $0x0,%al
call   1080 <getchar@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
xor    %eax,%eax
call   1040 <getuid@plt>
lea    0xe94(%rip),%rdi
mov    %eax,%esi
call   1050 <printf@plt>
xor    %eax,%eax
call   1090 <getegid@plt>
lea    0xe6c(%rip),%rdi
mov    %eax,%esi
call   1050 <printf@plt>
xor    %eax,%eax
call   1030 <getpid@plt>
mov    %eax,%edi
call   1060 <getsid@plt>
lea    0xe59(%rip),%rdi
mov    %eax,%esi
call   1050 <printf@plt>
xor    %eax,%eax
call   1070 <geteuid@plt>
lea    0xe4d(%rip),%rdi
mov    %eax,%esi
call   1050 <printf@plt>
xor    %eax,%eax
call   1080 <getchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [9 x i8] c"uid: %d\0A\00"
@.str.1 = [9 x i8] c"gid: %d\0A\00"
@.str.2 = [9 x i8] c"sid: %d\0A\00"
@.str.3 = [10 x i8] c"euid: %d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = call i32 (...) @getuid()
%7 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 %6)
%8 = call i32 (...) @getegid()
%9 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %8)
%10 = call i32 (...) @getpid()
%11 = call i32 @getsid(i32 %10)
%12 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %11)
%13 = call i32 (...) @geteuid()
%14 = call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), i32 %13)
%15 = call i32 (...) @getchar()
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"uid: %d\0A\00"
@.str.1 = [9 x i8] c"gid: %d\0A\00"
@.str.2 = [9 x i8] c"sid: %d\0A\00"
@.str.3 = [10 x i8] c"euid: %d\0A\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 (...) @getuid()
%4 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 %3)
%5 = tail call i32 (...) @getegid()
%6 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %5)
%7 = tail call i32 (...) @getpid()
%8 = tail call i32 @getsid(i32 %7)
%9 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %8)
%10 = tail call i32 (...) @geteuid()
%11 = tail call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), i32 %10)
%12 = tail call i32 (...) @getchar()
ret i32 0
}