user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<readconf>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  lea    -0x4000(%rsp),%r11
L135:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L135
  sub    $0x40,%rsp
  mov    %rdi,-0x4038(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movq   $0x0,-0x4028(%rbp)
  mov    -0x4038(%rbp),%rax
  lea    D21(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x4018(%rbp)
  cmpq   $0x0,-0x4018(%rbp)
  je     L132
  jmp    L137
L154:
  lea    -0x4010(%rbp),%rax
  mov    $0xb,%edx
  lea    D4(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L137
  movzbl -0x4005(%rbp),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %rax,%rax
  je     L137
  lea    -0x4010(%rbp),%rax
  mov    $0xa,%esi
  mov    %rax,%rdi
  call   <strrchr@plt>
  mov    %rax,-0x4030(%rbp)
  cmpq   $0x0,-0x4030(%rbp)
  je     L45
  mov    -0x4030(%rbp),%rax
  movb   $0x0,(%rax)
L45:
  lea    -0x4010(%rbp),%rax
  add    $0xb,%rax
  mov    %rax,-0x4030(%rbp)
  jmp    L74
L141:
  addq   $0x1,-0x4030(%rbp)
L74:
  mov    -0x4030(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L153
  mov    -0x4030(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %rax,%rax
  jne    L141
L153:
  mov    -0x4030(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L3
  mov    -0x4030(%rbp),%rax
  mov    %rax,-0x4028(%rbp)
  jmp    L3
L137:
  mov    -0x4018(%rbp),%rdx
  lea    -0x4010(%rbp),%rax
  mov    $0x4000,%esi
  mov    %rax,%rdi
  call   <fgets@plt>
  test   %rax,%rax
  jne    L154
  jmp    L140
L3:
  nop
L140:
  mov    -0x4018(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  jmp    L2
L132:
  mov    -0x4038(%rbp),%rax
  mov    %rax,%rsi
  lea    D26(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  mov    $0xffffffff,%edi
  call   <exit@plt>
L2:
  cmpq   $0x0,-0x4028(%rbp)
  je     L11
  mov    -0x4028(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    $0x1,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x4020(%rbp)
  cmpq   $0x0,-0x4020(%rbp)
  je     L11
  mov    -0x4028(%rbp),%rdx
  mov    -0x4020(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcpy@plt>
L11:
  mov    -0x4020(%rbp),%rax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L155
  call   <__stack_chk_fail@plt>
L155:
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D21
data_type: string
name: extract_symbolic_data
arguments: data_label: D4
data_type: string
name: extract_symbolic_data
arguments: data_label: D26
data_type: string

tool: D21: r

tool: D4: queuebounce

tool: D26: SYMPA internal error : unable to open %s

assistant: ```c
char *readconf(char *file) {
  FILE *f;
  char buf[16384], *p, *r, *s;
  r = NULL;
  if ((f = fopen(file, "r")) != NULL) {
    while (fgets(buf, sizeof buf, f) != NULL) {
      if (strncmp(buf, "queuebounce", 11) == 0 && isspace(buf[11])) {
        if ((p = strrchr((char *)buf, '\n')) != NULL)
          *p = '\0';
        p = buf + 11;
        while (*p && isspace(*p))
          p++;
        if (*p != '\0')
          r = p;
        break;
      }
    }
    fclose(f);
  } else {
    printf("SYMPA internal error : unable to open %s", file);
    exit(-1);
  }
  if (r != NULL) {
    s = malloc(strlen(r) + 1);
    if (s != NULL)
      strcpy(s, r);
  }
  return s;
}
```