user: What is the c source code of the assembly code below:

```asm
<find_intf>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x468,%rsp
  mov    %rdi,(%rsp)
  mov    %rsi,0x8(%rsp)
  mov    %edx,%ecx
  mov    %fs:0x28,%rax
  mov    %rax,0x458(%rsp)
  xor    %eax,%eax
  lea    0x10(%rsp),%rbx
  lea    D23(%rip),%rdx
  mov    $0x40,%esi
  mov    %rbx,%rdi
  call   <snprintf@plt>
  lea    D61(%rip),%rsi
  mov    %rbx,%rdi
  call   <popen@plt>
  test   %rax,%rax
  je     L12
  mov    %rax,%r15
  mov    $0x0,%r13d
  lea    0x50(%rsp),%r14
  jmp    L18
L12:
  mov    %rbx,%rsi
  lea    D86(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0xffffffff,%eax
  jmp    L104
L38:
  lea    D15(%rip),%rdi
  call   <puts@plt>
  mov    %r15,%rdi
  call   <pclose@plt>
  mov    $0xffffffff,%eax
  jmp    L104
L35:
  sub    %rbp,%rbx
  add    $0x1,%ebx
  mov    %ebx,%edi
  call   <malloc@plt>
  mov    %rax,%r12
  mov    %rbp,%rcx
  lea    D43(%rip),%rdx
  mov    %ebx,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <snprintf@plt>
  mov    (%rsp),%rax
  mov    %r12,(%rax,%r13,8)
  add    $0x1,%r13
L18:
  mov    %r15,%rdx
  mov    $0x400,%esi
  mov    %r14,%rdi
  call   <fgets@plt>
  test   %rax,%rax
  je     L53
  lea    D2(%rip),%rsi
  mov    %r14,%rdi
  call   <strstr@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L38
  lea    D81(%rip),%rsi
  mov    %r14,%rdi
  call   <strstr@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  jne    L35
  lea    D15(%rip),%rdi
  call   <puts@plt>
  mov    %r15,%rdi
  call   <pclose@plt>
  mov    $0xffffffff,%eax
  jmp    L104
L53:
  cmp    $0x4,%r13d
  jne    L1
  mov    0x8(%rsp),%rax
  movl   $0x4,(%rax)
  mov    %r15,%rdi
  call   <pclose@plt>
  mov    $0x0,%eax
L104:
  mov    0x458(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L56
  add    $0x468,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L1:
  lea    D6(%rip),%rdi
  call   <puts@plt>
  mov    %r15,%rdi
  call   <pclose@plt>
  mov    $0xffffffff,%eax
  jmp    L104
L56:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: label: D23
datatype: string
name: read_data
arguments: label: D61
datatype: string
name: read_data
arguments: label: D86
datatype: string
name: read_data
arguments: label: D15
datatype: string
name: read_data
arguments: label: D43
datatype: string
name: read_data
arguments: label: D2
datatype: string
name: read_data
arguments: label: D81
datatype: string
name: read_data
arguments: label: D6
datatype: string

tool: D23: grep -r '%x' /sys/class/net/*/device/device

tool: D61: r

tool: D86: Failed open pipe to run cmd : %s


tool: D15: Error in parse interface name

tool: D43: %s

tool: D2: eth

tool: D81: /device

tool: D6: Failed to find all ethernet interface

assistant: ```c
int find_intf(char **intf, uint8_t *size, int did) {
  char cmd[64];
  snprintf(cmd, 64, "grep -r '%x' /sys/class/net/*/device/device", did);
  FILE *fp = popen(cmd, "r");
  if (fp == NULL) {
    printf("Failed open pipe to run cmd : %s\n", cmd);
    return -1;
  }
  char buf[1024];
  uint8_t index = 0;
  while (fgets(buf, sizeof(buf), fp) != NULL) {
    char *start = strstr(buf, "eth");
    if (start == NULL) {
      printf("Error in parse interface name\n");
      pclose(fp);
      return -1;
    }
    char *end = strstr(buf, "/device");
    if (end == NULL) {
      printf("Error in parse interface name\n");
      pclose(fp);
      return -1;
    }
    uint8_t len = end - start;
    char *interf = (char *)malloc(sizeof(char) * (len + 1));
    snprintf(interf, len + 1, "%s", start);
    intf[index] = interf;
    index++;
  }
  if (index != 4) {
    printf("Failed to find all ethernet interface\n");
    pclose(fp);
    return -1;
  }
  *size = 4;
  pclose(fp);
  return 0;
}
```