user: What would the C source look like for the assembly code provided here?

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %edi,0xc(%rsp)
  mov    %rsi,%r15
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  cmp    $0x2,%edi
  jle    L145
L134:
  lea    0x10(%rsp),%rsi
  mov    0x10(%r15),%rdi
  call   <stat@plt>
  test   %rax,%rax
  jne    L179
L3:
  mov    0x10(%rsp),%r13
  mov    %r13,%rdi
  call   <malloc@plt>
  mov    %rax,%r12
  test   %rax,%rax
  je     L195
L84:
  mov    0x10(%r15),%rdi
  lea    D28(%rip),%rsi
  call   <fopen@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L41
L219:
  mov    %rbx,%rcx
  mov    %r13,%rdx
  mov    $0x1,%esi
  mov    %r12,%rdi
  call   <fread@plt>
  cmp    %r13,%rax
  jne    L73
L160:
  mov    %rbx,%rdi
  call   <fclose@plt>
  test   %rax,%rax
  je     L217
  lea    D73(%rip),%rdi
  call   <barf@plt>
  jmp    L217
L145:
  mov    (%rsi),%rdi
  call   <usage@plt>
  jmp    L134
L179:
  lea    D91(%rip),%rdi
  call   <barf@plt>
  jmp    L3
L195:
  lea    D41(%rip),%rdi
  call   <barf@plt>
  jmp    L84
L41:
  lea    D128(%rip),%rdi
  call   <barf@plt>
  jmp    L219
L73:
  lea    D22(%rip),%rdi
  call   <barf@plt>
  jmp    L160
L35:
  lea    D34(%rip),%rdi
  call   <croak@plt>
  call   *%r12
L217:
  lea    D112(%rip),%rdx
  mov    %r15,%rsi
  mov    0xc(%rsp),%edi
  call   <getopt@plt>
  cmp    $0xffffffff,%eax
  je     L47
  cmp    $0x65,%eax
  je     L35
  cmp    $0x70,%eax
  je     L30
  mov    (%r15),%rdi
  call   <usage@plt>
  jmp    L217
L30:
  lea    D129(%rip),%rdi
  call   <puts@plt>
  test   %r13,%r13
  jle    L55
  mov    $0x0,%ebx
  mov    $0xf,%ebp
  lea    D21(%rip),%r14
  jmp    L164
L149:
  lea    D102(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x0,%ebp
L82:
  add    $0x1,%ebp
  movzbl (%r12,%rbx,1),%esi
  mov    %r14,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  add    $0x1,%rbx
  cmp    %rbx,%r13
  je     L55
L164:
  cmp    $0xe,%ebp
  jle    L82
  test   %ebx,%ebx
  je     L149
  lea    D95(%rip),%rdi
  call   <puts@plt>
  jmp    L149
L55:
  lea    D124(%rip),%rdi
  call   <puts@plt>
  jmp    L217
L47:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L81
  mov    $0x0,%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L81:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_label: D28
type: string
name: unpack_data
arguments: data_label: D73
type: string
name: unpack_data
arguments: data_label: D91
type: string
name: unpack_data
arguments: data_label: D41
type: string
name: unpack_data
arguments: data_label: D128
type: string
name: unpack_data
arguments: data_label: D22
type: string
name: unpack_data
arguments: data_label: D34
type: string
name: unpack_data
arguments: data_label: D112
type: string
name: unpack_data
arguments: data_label: D129
type: string
name: unpack_data
arguments: data_label: D21
type: string
name: unpack_data
arguments: data_label: D102
type: string
name: unpack_data
arguments: data_label: D95
type: string
name: unpack_data
arguments: data_label: D124
type: string

tool: D28: rb

tool: D73: failed to close file

tool: D91: failed to stat file

tool: D41: failed to grab required memeory

tool: D128: failed to open file

tool: D22: failed to slurp file

tool: D34: Calling code ...

tool: D112: e:p:

tool: D129: 

char shellcode[] =

tool: D21: \x%02x

tool: D102: 	"

tool: D95: "

tool: D124: ";



assistant: ```c
int main(int argc, char **argv) {
  FILE *fp;
  void *code;
  int arg;
  int i;
  int l;
  int m = 15;
  struct stat sbuf;
  long flen;
  void (*fptr)(void);
  if (argc < 3)
    usage(argv[0]);
  if (stat(argv[2], &sbuf))
    barf("failed to stat file");
  flen = (long)sbuf.st_size;
  if (!(code = malloc(flen)))
    barf("failed to grab required memeory");
  if (!(fp = fopen(argv[2], "rb")))
    barf("failed to open file");
  if (fread(code, 1, flen, fp) != flen)
    barf("failed to slurp file");
  if (fclose(fp))
    barf("failed to close file");
  while ((arg = getopt(argc, argv, "e:p:")) != -1) {
    switch (arg) {
    case 'e':
      croak("Calling code ...");
      fptr = (void (*)(void))code;
      (*fptr)();
      break;
    case 'p':
      printf("\n\nchar shellcode[] =\n");
      l = m;
      for (i = 0; i < flen; ++i) {
        if (l >= m) {
          if (i)
            printf("\"\n");
          printf("\t\"");
          l = 0;
        }
        ++l;
        printf("\\x%02x", ((unsigned char *)code)[i]);
      }
      printf("\";\n\n\n");
      break;
    default:
      usage(argv[0]);
    }
  }
  return 0;
}
```