user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<main>:
  endbr64
  push   %r12
  lea    D88(%rip),%rdi
  lea    D20(%rip),%r12
  push   %rbp
  lea    D120(%rip),%rbp
  sub    $0x18,%rsp
  call   <puts@plt>
  lea    D24(%rip),%rdi
  call   <puts@plt>
  xor    %eax,%eax
  call   <show_env@plt>
  lea    D81(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <setenv@plt>
  xor    %eax,%eax
  call   <show_env@plt>
  lea    D141(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%edx
  lea    D64(%rip),%rsi
  mov    %rbp,%rdi
  call   <setenv@plt>
  xor    %eax,%eax
  call   <show_env@plt>
  lea    D5(%rip),%rdi
  call   <puts@plt>
  xor    %edx,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <setenv@plt>
  xor    %eax,%eax
  call   <show_env@plt>
  lea    D45(%rip),%rdi
  call   <puts@plt>
  xor    %edx,%edx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <setenv@plt>
  xor    %eax,%eax
  call   <show_env@plt>
  lea    D38(%rip),%rdi
  call   <puts@plt>
  lea    D6(%rip),%rdi
  call   <getenv@plt>
  test   %rax,%rax
  je     L4
  xor    %eax,%eax
  call   <oops@plt>
L4:
  lea    D32(%rip),%rdi
  call   <puts@plt>
  mov    %rbp,%rdi
  call   <getenv@plt>
  mov    %rax,%rsi
  test   %rax,%rax
  je     L15
L16:
  lea    D16(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  lea    D152(%rip),%rdi
  call   <puts@plt>
  lea    D155(%rip),%rdi
  call   <putenv@plt>
  xor    %eax,%eax
  call   <show_env@plt>
  lea    D101(%rip),%rdi
  call   <puts@plt>
  lea    D40(%rip),%rdi
  call   <putenv@plt>
  xor    %eax,%eax
  call   <show_env@plt>
  xor    %edi,%edi
  call   <exit@plt>
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
L15:
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  call   <oops@plt>
  mov    0x8(%rsp),%rsi
  jmp    L16
```

tool_calls: name: unpack_data
arguments: label: D88
type: string
name: unpack_data
arguments: label: D20
type: string
name: unpack_data
arguments: label: D120
type: string
name: unpack_data
arguments: label: D24
type: string
name: unpack_data
arguments: label: D81
type: string
name: unpack_data
arguments: label: D141
type: string
name: unpack_data
arguments: label: D64
type: string
name: unpack_data
arguments: label: D5
type: string
name: unpack_data
arguments: label: D45
type: string
name: unpack_data
arguments: label: D38
type: string
name: unpack_data
arguments: label: D6
type: string
name: unpack_data
arguments: label: D32
type: string
name: unpack_data
arguments: label: D16
type: string
name: unpack_data
arguments: label: D152
type: string
name: unpack_data
arguments: label: D155
type: string
name: unpack_data
arguments: label: D101
type: string
name: unpack_data
arguments: label: D40
type: string

tool: D88: test environment variables

tool: D20: /boot

tool: D120: PATH

tool: D24: show env

tool: D81: setenv-1

tool: D141: setenv-2

tool: D64: /boot:/bin

tool: D5: setenv-3

tool: D45: setenv-4

tool: D38: getenv-1

tool: D6: TMP

tool: D32: getenv-2

tool: D16: PATH=%s


tool: D152: putenv-1

tool: D155: TMP=/tmp

tool: D101: putenv-2

tool: D40: ABC=/abc

assistant: ```c
int main(int argc, char *argv[]) {
  char *val;
  printf("test environment variables\n");
  printf("show env\n");
  show_env();
  printf("setenv-1\n");
  setenv("PATH", "/boot", 1);
  show_env();
  printf("setenv-2\n");
  setenv("PATH", "/boot:/bin", 1);
  show_env();
  printf("setenv-3\n");
  setenv("PATH", "/boot", 0);
  show_env();
  printf("setenv-4\n");
  setenv("PATH", "/boot", 0);
  show_env();
  printf("getenv-1\n");
  val = getenv("TMP");
  if (val != NULL)
    oops();
  printf("getenv-2\n");
  val = getenv("PATH");
  if (val == NULL)
    oops();
  printf("PATH=%s\n", val);
  printf("putenv-1\n");
  putenv("TMP=/tmp");
  show_env();
  printf("putenv-2\n");
  putenv("ABC=/abc");
  show_env();
  exit(0);
}
```