user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rsi,%rbp
  lea    -0x3(%rdi),%eax
  cmp    $0x1,%eax
  ja     L60
  mov    %edi,%r12d
  mov    0x8(%rsi),%r13
  mov    0x10(%rsi),%rdi
  call   <parse_gpio_pin@plt>
  mov    %eax,%ebx
  cmp    $0x4,%r12d
  jne    L89
  mov    0x18(%rbp),%rsi
  lea    D154(%rip),%rdi
  call   <strcmp@plt>
  mov    $0x2,%r12d
  test   %rax,%rax
  jne    L29
L37:
  lea    D119(%rip),%rsi
  mov    %r13,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L17
  mov    %ebx,%esi
  lea    D22(%rip),%rdi
  call   <write_pin_to_path@plt>
  lea    D25(%rip),%rsi
  mov    %ebx,%edi
  call   <allow_access_by_user@plt>
  lea    D116(%rip),%rsi
  mov    %ebx,%edi
  call   <allow_access_by_user@plt>
  lea    D6(%rip),%rsi
  mov    %ebx,%edi
  call   <allow_access_by_user@plt>
  lea    D15(%rip),%rsi
  mov    %ebx,%edi
  call   <allow_access_by_user@plt>
  mov    %r12d,%esi
  mov    %ebx,%edi
  call   <set_pullupdown@plt>
  jmp    L5
L60:
  mov    %rsi,%rdi
  call   <usage_error@plt>
  mov    0x8(%rbp),%r13
  mov    0x10(%rbp),%rdi
  call   <parse_gpio_pin@plt>
  mov    %eax,%ebx
L89:
  lea    D119(%rip),%rsi
  mov    %r13,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L90
L17:
  lea    D38(%rip),%rsi
  mov    %r13,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L18
  mov    %ebx,%esi
  lea    D86(%rip),%rdi
  call   <write_pin_to_path@plt>
  jmp    L5
L29:
  mov    0x18(%rbp),%rsi
  lea    D107(%rip),%rdi
  call   <strcmp@plt>
  mov    $0x1,%r12d
  test   %rax,%rax
  je     L37
  mov    %rbp,%rdi
  call   <usage_error@plt>
  jmp    L89
L18:
  mov    %rbp,%rdi
  call   <usage_error@plt>
  jmp    L5
L90:
  mov    %ebx,%esi
  lea    D22(%rip),%rdi
  call   <write_pin_to_path@plt>
  lea    D25(%rip),%rsi
  mov    %ebx,%edi
  call   <allow_access_by_user@plt>
  lea    D116(%rip),%rsi
  mov    %ebx,%edi
  call   <allow_access_by_user@plt>
  lea    D6(%rip),%rsi
  mov    %ebx,%edi
  call   <allow_access_by_user@plt>
  lea    D15(%rip),%rsi
  mov    %ebx,%edi
  call   <allow_access_by_user@plt>
L5:
  mov    $0x0,%eax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

tool_calls: name: retrieve_data
arguments: data_label: D154
datatype: string
name: retrieve_data
arguments: data_label: D119
datatype: string
name: retrieve_data
arguments: data_label: D22
datatype: string
name: retrieve_data
arguments: data_label: D25
datatype: string
name: retrieve_data
arguments: data_label: D116
datatype: string
name: retrieve_data
arguments: data_label: D6
datatype: string
name: retrieve_data
arguments: data_label: D15
datatype: string
name: retrieve_data
arguments: data_label: D38
datatype: string
name: retrieve_data
arguments: data_label: D86
datatype: string
name: retrieve_data
arguments: data_label: D107
datatype: string

tool: D154: pullup

tool: D119: export

tool: D22: /sys/class/gpio/export

tool: D25: direction

tool: D116: value

tool: D6: active_low

tool: D15: edge

tool: D38: unexport

tool: D86: /sys/class/gpio/unexport

tool: D107: pulldown

assistant: ```c
int main(int argc, char **argv) {
  int pullupdown = -1;
  if (argc != 3 && argc != 4) {
    usage_error(argv);
  }
  const char *command = argv[1];
  const char *pin_str = argv[2];
  unsigned int pin = parse_gpio_pin(pin_str);
  if (argc == 4) {
    if (strcmp("pullup", argv[3]) == 0)
      pullupdown = 2;
    else if (strcmp("pulldown", argv[3]) == 0)
      pullupdown = 1;
    else {
      usage_error(argv);
    }
  }
  if (strcmp(command, "export") == 0) {
    write_pin_to_path(("/sys/class/gpio/"
                       "export"),
                      pin);
    allow_access_by_user(pin, "direction");
    allow_access_by_user(pin, "value");
    allow_access_by_user(pin, "active_low");
    allow_access_by_user(pin, "edge");
    if (pullupdown != -1) {
      set_pullupdown(pin, pullupdown);
    }
  } else if (strcmp(command, "unexport") == 0) {
    write_pin_to_path(("/sys/class/gpio/"
                       "unexport"),
                      pin);
  } else {
    usage_error(argv);
  }
  return 0;
}
```