user: Demonstrate the C code that generates the assembly output below:

```asm
<authmod_fail_completely>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  lea    D54(%rip),%rax
  mov    %rax,%rdi
  call   <getenv@plt>
  mov    %rax,-0x40(%rbp)
  cmpq   $0x0,-0x40(%rbp)
  je     L21
  lea    -0x48(%rbp),%rdx
  mov    -0x40(%rbp),%rax
  lea    D16(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sscanf@plt>
  test   %rax,%rax
  jle    L21
  mov    -0x48(%rbp),%eax
  test   %eax,%eax
  jg     L72
L21:
  mov    $0xc,%edx
  lea    D48(%rip),%rax
  mov    %rax,%rsi
  mov    $0x2,%edi
  call   <write@plt>
  mov    $0x1,%edi
  call   <authexit@plt>
L72:
  mov    -0x48(%rbp),%eax
  add    $0x1,%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x38(%rbp)
  cmpq   $0x0,-0x38(%rbp)
  jne    L22
  lea    D17(%rip),%rax
  mov    %rax,%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <authexit@plt>
L22:
  movl   $0x0,-0x44(%rbp)
  jmp    L68
L25:
  mov    -0x44(%rbp),%edx
  lea    -0x30(%rbp),%rax
  lea    D20(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  mov    -0x44(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  lea    (%rdx,%rax,1),%rbx
  lea    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <getenv@plt>
  mov    %rax,(%rbx)
  mov    (%rbx),%rax
  test   %rax,%rax
  jne    L77
  mov    $0x1,%edi
  call   <authexit@plt>
L77:
  addl   $0x1,-0x44(%rbp)
L68:
  mov    -0x48(%rbp),%eax
  cmp    %eax,-0x44(%rbp)
  jl     L25
  mov    -0x44(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  movq   $0x0,(%rax)
  lea    D18(%rip),%rax
  mov    %rax,%rdi
  call   <getenv@plt>
  mov    %rax,-0x40(%rbp)
  cmpq   $0x0,-0x40(%rbp)
  jne    L48
  mov    $0x1,%edi
  call   <authexit@plt>
L48:
  mov    -0x38(%rbp),%rdx
  mov    -0x40(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <execv@plt>
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <authexit@plt>
  nop
  mov    -0x18(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L16
  call   <__stack_chk_fail@plt>
L16:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

tool_calls: name: unpack_data
arguments: data_label: D54
type_infered: string
name: unpack_data
arguments: data_label: D16
type_infered: string
name: unpack_data
arguments: data_label: D48
type_infered: string
name: unpack_data
arguments: data_label: D17
type_infered: string
name: unpack_data
arguments: data_label: D20
type_infered: string
name: unpack_data
arguments: data_label: D18
type_infered: string

tool: D54: AUTHARGC

tool: D16: %d

tool: D48: AUTHFAILURE


tool: D17: malloc

tool: D20: AUTHARGV%d

tool: D18: AUTHUSER

assistant: ```c
void authmod_fail_completely() {
  char **argv;
  int argc, n;
  const char *p = getenv("AUTHARGC");
  char buf[20];
  if (!p || sscanf(p, "%d", &argc) <= 0 || argc <= 0) {
    write(2, "AUTHFAILURE\n", 12);
    authexit(1);
  }
  if ((argv = (char **)malloc((argc + 1) * sizeof(char *))) == 0) {
    perror("malloc");
    authexit(1);
  }
  for (n = 0; n < argc; n++) {
    sprintf(buf, "AUTHARGV%d", n);
    if ((argv[n] = getenv(buf)) == 0)
      authexit(1);
  }
  argv[n] = 0;
  p = getenv("AUTHUSER");
  if (!p)
    authexit(1);
  execv(p, argv);
  perror(p);
  authexit(1);
}
```